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Expert Answers about Grease Caps


  • Replacement Grease Caps for Trailers Using 2.70 and 3.35 Inch Diameter Caps
  • The best way to determine the grease cap needed would be to measure the inside diameter of the hub bore, where the grease caps sit. Grease caps are meant to fit tightly, and they're made of metal that's softer than the hubs, so they can deform and get bent up and not provide a consistent diameter when you go to measure them. For the 2.70 inch cap, a new cap would probably be just a bit larger, maybe 2.72 inches, as it'll compress a bit as you drive it in. For the 3.35 inch cap, we have...
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  • Choosing the Correct Grease Cap
  • At this time we do not carry a 2-1/8 inch diameter grease cap, however, we do have a few grease caps that are close to that measurement. I recommend using a precise measuring tool such as digital calipers to measure the inner diameter of your hub bore. This will give us an exact measurement as a starting point. Typically, when choosing a grease cap, you want to get an accurate measurement of the inner diameter of your hub bore and then choose a slightly larger grease cap. The next size...
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  • Bearing Buddy Recommendation for a Harbor Freight Trailer
  • I actually called Harbor Freight about your trailer to determine what size dust cap is used on that trailer. I reached a tech and he stated that the dust cap is 52mm or 2.0488 inches. It looks like the best option is # BB2047 or # BB2047SS . However, you normally want them to be slightly larger than the hub bore to fit snugly.
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  • Need Grease Caps With Outer Diameter of 3.350 Inches
  • We do have standard grease caps (aka dust caps) in an outer diameter of 3.355 inches for a Nev-R-Lube axle, part # 75DC, and also in an outer diameter of 3.358 inches for a standard axle, part # F106122. Both are drive-in types whose slightly larger diameter will ensure a snug fit. The linked video may be helpful to you.
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  • Bearing Buddy Recommendation For Kodiak Disc Brake Assembly With 1.98 Inch Hub Bore
  • The Bearing Buddy you will need to order for the Kodiak Disc Brake Assembly, part # K1HR35DS, is part # BB1980A-SS. These are designed to work with a hub bore that measures 1.98 inches, and have a lifetime warranty. I have included a link to an installation video you can check out.
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  • How to Pick Out Bearing Buddy for a 5th Wheel Trailer
  • In order to pick out the correct bearing buddy you will need know the pilot hole of your hub. To do this, remove the wheel and tire and remove the grease cap from the center of the hub. Usually it is a metal cap that is just lightly hammered into place. Use a screwdriver to pry off the cap. Clean the grease off and measure the opening with a mircometer. I have included a video demonstrating the Bearing Buddy. The Bearing Buddies # BB1980A-SS that you referenced are for hubs with a...
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  • Bearing Protector Not Wanting to Fit Into Hub Bore
  • Believe it or not, the outside diameter of the Bearing Buddy is designed to be a bit larger than the inside diameter of the hub bore. Typically, a Bearing Buddy sized to fit a 1.98 hub bore will actually be about 1.986 in diameter, which means yours is about right. As long as the inside diameter of the hub bore is between 1.980 - 1.983, you should be able to drive that bearing into place using a scrap of wood between the bearing protector and the hammer. I've installed a few of the...
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  • Bearing Buddy Recommendation to Replace a 2-3/32 Diameter Grease Cap
  • If the measurement you listed (2-3/32 inches) the only caps we offer that would work would be a Bearing Buddy part # BB2080SS. We do not have any standard grease caps that would fit.
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  • How To Determine Correct Hub Assembly For a 17-Foot Boat Trailer
  • The easiest way to determine what hub assembly you will need is to get the part numbers of the inner and outer bearings and the grease seal part number from the hub assembly that is on the trailer now. If you do not have the old bearings, you will need to measure the spindle on your trailer to determine the size bearings that you will need, and what hub assembly will work. Trailer hub assemblies are not a universal fit. If you can let me know the part numbers of your bearings and grease...
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  • Is 2.33 Inch Grease Cap With Plug Available For Boat Trailer
  • In order to determine the correct size grease cap, the best thing to do would be to take apart one of the hubs and get the outer bearing and race numbers. You can also get the hub bore inner diameter using dial calipers for the most accurate measurement. I have attached a link to the grease caps we offer with the removable plug, but none of these match the 2.33 diameter. The only grease cap we offer that will fit a 2.33 inch opening is the Fulton Grease Cap, part # F001926. This cap...
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  • How to Grease Boat Trailer Wheel Bearings on Trailer that Has Rubber Flange on Grease Cap
  • It is a good idea to inspect and lubricate your trailer bearings at least once per year at the start of the season. If your trailer has a grease cap like # DC200L-DCRP but does not have EZ-Lube spindles with a zerk grease fitting to allow use of a grease gun it may be that these caps were added in place of standard grease caps. In this case you will need to remove and re-pack your bearings with fresh marine grease like # L11404 as outlined in the linked video and article. If you wish...
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  • How to Pick out the Correct Dust Cap Size for a Trailer
  • The Bearing Buddy part # BB2047 is supposed to be a snug fit. If a 2 inch diameter cap is too small the # BB2047 should be the right fit. But without knowing what the diameter of the hub bore its hard to say that definitively. I would recommend you use a micrometer to determine the bore and go from there. I attached a page that has all of the grease caps we offer.
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  • How to Pick out Bearing Buddies
  • Sounds like your trailer has Bearing Buddies like the part # BB1810SS that you referenced. In order to pick out the correct bearing buddy you will need know the pilot hole of your hub. To do this, remove the wheel and tire and remove the grease cap from the center of the hub. Usually it is a metal cap that is just lightly hammered into place. Use a screwdriver to pry off the cap. Clean the grease off and measure the opening. I have included a video demonstrating the Bearing Buddy. The...
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  • Replacement Grease Caps for 2007 Rockwood Freedom Model 2280 Tent Camper
  • Replacement grease caps can be selected by measuring the diameter of your hub's bore. There are also several types offered. Trailer manufacturers may change some of the components they use on any given product; the only way to know the exact original part is to contact Rockwood with your camper's VIN number. An easier way is to use a precision digital caliper to measure the bore of your hubs. Once you know that you can use the link provided to choose both the type and size you need.
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  • EZ-Lube Grease Caps for Travel Trailer
  • It sounds like your travel trailer may use EZ-Lube spindles that have a grease zerk fitting. We offer several sizes of EZ-Lube grease caps. You can use the link provided to see all, and simply then click on the outer diameter that matches your hubs. If you require the actual bearing protectors themselves you can use the other link provided to search based on your hub's bore diameter and whether or not they are threaded. The filters in the left-hand margin will let you sort the results...
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  • Will the Bearing Buddy part # BB2047 fit a Harbor Freight Trailer 5002
  • It should, we have found that the Bearing Buddy part # BB2047 fits several Harbor Freight Trailers. Including the following trailers 90154 42709 90153 42708 2575 2948
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  • Which Bearing Buddy for a 1989 Karavan Jet Ski Trailer with 1.97" Diameter Grease Caps
  • If your existing grease cap is marked 1.97, you're probably needing Bearing Buddies for a 1.98 inch hub bore. The stainless steel model, part # BB1980A-SS would be ideal. Bearing Buddies and grease caps are meant to fit tightly, so be sure to verify the diameter of your hub bore. A digital caliper is best for this, as a ruler or tape measure usually isn't accurate enough. Bearing Buddies are only compatible with standard spindles, not EZ-Lube Spindles with the grease zerk.
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  • How Do I Determine What Bearing Buddy Bearing Protectors I Need for My 2006 Pilgrim Cirrus Camper
  • In order to see if the Bearing Buddy Bearing Protectors, # BB2441, are the correct ones for your trailer, you will need to measure the inner diameter of your hub bore. This measurement needs to be very accurate so you will want to use a dial caliper. If the inner diameter of your hub bore is 2.441 inches, # BB2441 will work for you. If it is not, I am attaching a link to all of the Bearing Buddy Bearing Protectors that we have available. Take your measurement and match it to one...
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  • Are Bearing Buddies Compatible with Standard Trailer Bearings and Seals
  • All you need to do to install and use the Bearing Buddy Protectors part # BB1980A is remove your current caps like you did and install the # BB1980A. This product will work with your current bearings and seals just fine.
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  • Bearing Buddy to Fit Boat Trailer Hub with 1.9-Inch Threaded Hub Bore
  • The Bearing Buddy Threaded Bearing Protectors you referenced, part # BB1980T-SS, are the only ones that are close to your hub bore measurement of 1.9-inches. The other two sizes are both over 2-inches. These should fit your threaded hubs. Please note that the depth of the threaded portion of this part is 5/16ths of an inch. Bearing Buddy recommends using Perma-tex or another grease proof gasket cement when installing these bearing protectors.
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  • Comparing TruRyde and Fulton Grease Caps for Trailer Hubs with 1.988 Inch Bore
  • There is basically no difference between dust cap set # RG04-020 and single cap # F001518 other than # F001518 is a single unit and # RG04-020. They otherwise have the same dimensions just from two different manufacturers.
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  • Will Bearing Buddy Bearing Protectors Fit a Harbor Freight Trailer with 2.0625 Inch Hub Bore
  • The Harbor Freight trailers often have uncommon parts on them. This is likely the case with your trailer since there are no bearing protectors that match the hub bore you mentioned. The closest match is a Model 2080 such as # BB2080SS. They measure 2.080 inches. It may not seem like a big difference but for products like these, it really is. I recommend checking the measurement again, maybe on the other hub, to see if it isn't closer to 2.080. You can also check the outer bearing number...
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  • Looking for Oil Cap to Replace Dexter 21-17
  • I have been unable to find a replacement for a 21-17 Oil Cap (even on Dexter's website), but if you'll use a digital caliper to get the dimension of your hub bore, I'd be happy to continue looking for you. The measurement needs to be precise, a ruler or measuring tape wouldn't be accurate enough. I'll also need to know if your hub bore is threaded.
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  • Which Bearing Buddy Will Fit Trailer With Hub Bore Diameter Of 2.328
  • The Bearing Buddy that has the closest dimension to the size you referenced is part # BB2328. This Bearing Buddy is designed to fit hubs with an inner diameter of 2.328. If you can let me know what the outer bearing number is you have installed on your trailer, we can check to make sure this Bearing Buddy would work for you.
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  • How to Pick out Bearing Buddies
  • In order to pick out the correct bearing buddy you will need know the pilot hole of your hub. To do this, remove the wheel and tire and remove the grease cap from the center of the hub. Usually it is a metal cap that is just lightly hammered into place. Use a screwdriver to pry off the cap. Clean the grease off and measure the opening. I have included a video demonstrating the Bearing Buddy. The Bearing Buddies # BB1980A-SS that you referenced are for hubs with a 1.781 inch hub bore.
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  • Available Wheel Center Caps When Using Grease Cap, # RG04-040
  • The only style cover that we have available for the Grease Cap, # RG04-040, would be wheel center caps. I am including a link to all of the center caps that we currently have available. There are no bra style covers available for the grease cap.
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  • Availability of Grease Caps or Bearing Buddies for Craftsman Lawn Tractor
  • If you can reply with the inside diameter of the hub bore, I'd be happy to check if we offer any grease caps or Bearing Buddies that would work. You'll need to use an accurate measuring device like a digital caliper. A ruler or tape measure wouldn't be accurate enough.
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  • Choosing Bearing Buddies for 2003 Keystone 28 BHS Travel Trailer
  • Bearing Buddies are selected based on a precise measurement of your trailer hubs' bore. It is necessary to take this measurement with a digital caliper since the fit of a Bearing Buddy needs to be quite exact. The link provided will take you to our main page for all sizes. You can use your measurement of the hub bore to match the appropriate set of Bearing Buddies. Sets are available in both chrome-finish and stainless steel versions. Most Bearing Buddy sets are non-threaded, but threaded...
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  • Need a Grease Cap / Hub Dust Cap to Fit Dexter 10 Inch Drums
  • If you have a standard spindle you will use Grease Cap, # RG04-020, on your 10 inch drum. For an E-Z Lube spindle, Grease Cap, # RG04-040, would be used.
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  • How to Measure a Hub to Determine the Right Grease Cap to Use
  • To measure for a grease cap you will need to use something that can provide a very accurate measurement such as dial or digital calipers. Then you will measure the diameter at the center of the hub where the grease cap will fit. Grease cap # DC250L-DCRP would fit a 2.44 hub bore. I have included a picture that shows where to measure. Another way that you can determine the grease cap needed is to pull the hub and get the inner and outer bearing numbers stamped into the metal of the bearings....
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  • How to Determine if the Grease Cap for a Hub
  • If you are looking for a grease cap PLUG with the TRP stamped on it chances are the Grease Cap Plug for E-Z Lube Grease Caps # RG04-010 would work for you, but to be certain you will want to measure the diameter of the grease cap hole. If it is 1.18 inches across then the # RG04-010 would work for you. If you only needed one cap you would want the # DC-RP. If you are looking for the whole cap you would need to check out the picture I attached that shows where exactly to measure to...
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  • Do Tru Ryde Grease Caps come with Grease Plugs
  • I went out to the warehouse and pulled the Tru Ryde Grease Cap # RG04-040 and yes they do come with the black plug. I have made a video which shows the grease caps with and without the plugs installed.
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  • Bearing Buddies for 8000 LB Arctic Trailer
  • In order to choose the correct model Bearing Buddies for your trailer, you would need to determine the inside diameter of the hub bore. You would need to use a digital caliper to get the hub bore measurement, as a ruler or measuring tape would not be accurate enough. Once you know the hub bore, you can use the provided link to find the correct Bearing Buddy. With the hub bore diameter, you can use the link to go to the bearing protector product page, where you can use the filters on...
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  • Determining Bearing Buddy Size For Folding Trailer
  • The best way to find the correct Bearing Buddy for your folding trailer is by checking the numbers on the outer bearing. I have attached a photo that shows where the numbers can typically be found. You can use those numbers to find the correct Bearing buddy that will work for you. Another way to find the correct Bearing Buddy is by measuring the hub bore. You will need a caliper to get an accurate measurement. After getting the measurement you can choose the Bearing Buddy that fits....
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  • Are Other Parts Needed to Install Bearing Buddy Bearing Protectors # BB1980A-SS
  • The Bearing Buddy Bearing Protectors you referenced, part # BB1980A-SS, do not require other parts for installation on your trailer hubs. What is important is that your current trailer hubs have the correct bore for these parts, 1.980-inches as measured with a digital caliper, and that your outer bearing number matches one of the three that are compatible with this Bearing Buddy kit: L-44643, L-44649 or L-44640. Also please note that Bearing Buddies cannot be used on EZ-Lube spindles...
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  • How Does Inner Bearing Get Grease When using Bearing Buddy
  • Bearing Buddy pumps grease into the center of the hub all the way back to the grease seal. A double lip seal should be used to prevent grease from blowing out the seal when added. When the hub and seals and bearings are first assembled, they should be packed. After a period of time and when you want to maintain the grease on the bearings, the grease would travel from the zerk fitting on the Bearing buddy through the outer bearing. It would then fill the cavity inside the hub and continue...
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  • Correct Grease Caps for an Axle Equipped with a Grease Zerk
  • It sounds like you have an EZ Lube type of spindle, that has a grease zerk on the spindle. You are correct that the standard grease caps do not provide the proper clearance for this style of spindle. With the bearing numbers that you provided I was able to determine that outer diameter of the grease cap that you will need is 1.986 inches. Then the correct grease cap fitting for your is the TruRyde EZ Lube Grease Cap # RG04-040. These grease caps have a removable rubber center portion...
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  • Bearing Buddies for a Bearing with 1.625 Inner Diameter on a Motorcycle Trailer
  • Bearing measurements have to be as precise as possible so if you are not using dial or digital calipers you will want to get some. But that is only if you cannot read the bearing number on the outer bearing. It should be stamped into the metal of the bearing. The diameter of the Bearing Buddies is its outer diameter where it fits into the end of the hub. It is actually slightly larger than the opening because you need a very tight fit. If your outer bearing number is # LM-11949 then...
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  • How to Determine Correct Bearing Buddy for 1994 Ranger Trailer with Outer Race # 68110
  • The outer race number you provided, 68110, corresponds to part # L68110 from TruRyde. This race works with bearing # L68149 and has an outer diameter of 2.327 inches. The Bearing Buddy with the closest diameter to this is part # BB2328, which is a chrome-plated pair of bearing protectors that fits a hub bore of 2.328 inches. We also offer a stainless-steel version, part # BB2328SS. You will need to confirm either the outer bearing number from your trailer spindle or take a precise...
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  • Bearing Buddy Recommendation that is the Next Size Smaller than the # BB2240
  • The next smaller size Bearing Buddy from the Bearing Buddy part # BB2240 that you referenced would be the Bearing Buddy # BB2080. I attached a link to a page that has all of the Bearing Buddies we offer.
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  • Does 6 Thousandths of an Inch Difference Matter when Replacing Dust Caps on a Trailer
  • When it comes to hubs 6 thousandths of an inch can make a difference between a fit and not a fit. But for grease caps it is not going to matter much. The fit needs to be tight so they do not fall out. So you can use # RG04-040 that you have referenced. I also recommend driver tool # 290-991 to ensure you get the caps in straight.
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  • How to Determine if the Oil Cap Kit # RG04-270 Would fit Hubs
  • The Oil Cap Kit # RG04-270 that you referenced is designed to fit the following axles: Dexter 9K (after 10/1989), 10K GD (2-piece drum), and 10K to 15K Dexter axles. You will need to confirm that you have one of those axles to know if the # RG04-270 would work for you. There should be a plaque or sticker on the frame of your trailer near the coupler that should list what axles you have. There might also be the same on the axles themselves for you to determine which one.
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  • How Do I Determine Which Bearing Buddy Bearing Protector Will Fit My Aspen Motorcycle Trailer
  • The best way to make sure you receive the correct Bearing Buddy bearing protector is to measure the inner diameter of the hub bore (see photo). Unfortunately, the manufacturer of Aspen trailers does not provide much information about their trailers or replacement parts, so I was not able to obtain the OEM grease cap size that Aspen uses. I strongly recommend measuring the hub bore with a precise measuring tool such as a dial caliper because hub bores can vary down to the thousandths...
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  • How to Determine Which Bearing Buddy Set Will Fit a Boat Trailer
  • There are 2 ways to determine what size Bearing Buddy you will need for a given trailer hub. First and most accurate is to get the outer bearing number off of the bearing. You can do this without removing the hub. You just need to be able to see the outside of the outer bearing. Wipe away the grease to see the number stamped into the side. With that number I can determine if there is an option available. The other way is to measure the hub center hole using a set of dial or digital calipers....
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  • Bearing Buddy for 1.98 and 2.13 Inch Trailer Hub Center Hole
  • First I would get the hubs matched up because if they are different sizes that can lead to uneven wear of the tires and suspension components. Not to mention you would have to buy two sets of replacement parts all the time. But if the 2 hubs are on two different axles, that makes more sense. We have a lot of options for the 1.98 size. I have included a link to them on the right. For just a regular set use # BB1980A. The 2.13 is more difficult because it is in between sizes. If you...
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  • Bearing Buddies for Trailer with Inner Bearing L68149 and Outer Bearing L44649
  • Are you sure the outer bearing is not L44649? If it is then you can use # BB1980A-SS or # BB1980A. With an inner bearing of L68149 the matching outer bearing is most likely L44649.
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  • Can Trailer Dust Caps, Grease Caps, and Bearing Protectors Fall Off By Themselves
  • Dust covers can indeed fall off on their own if they are not driven in correctly. If they are crooked then what happens is when the wheels are turning the cover will look like its wobbling (like a washing machine off balance) and gradually it being off center will cause it to work itself free. It is possible that the shop did not drive them in all the way. This seems to happen more with bearing protectors like # BB1781 that you have referenced because they can be a little more tricky...
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  • What Size Grease Cap Will Fit 1.95-inch Hub and EZ-Lube Spindles
  • You identified the correct grease cap, part # RG04-040. This is sold as a set of two caps. If you ever need replacement rubber plugs we also offer these as a set of two, part # RG04-010. Since your trailer uses EZ-Lube zerk fittings on the spindles you will be better off with a grease cap that has a removable plug. This will enable you to get quick access to the grease fitting without having to take off the grease caps. If you want to simplify installation of the grease caps you might...
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  • Determining Size of Bearing Protector Needed for 2001 Load Rite Trailer
  • The best way to determine the size of bearing buddy needed would be to take a highly accurate measurement of your hub bore using a digital caliper. I have edited a photo for you that shows this dimension. If you happened to know the reference number from your outer wheel bearings, the proper bearing protector could be determined. If you would care to reply with either the hub bore dimension or the outer bearing number, I would be happy to suggest a bearing protector for you.
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  • Outside Dimensions of Trailer Dust Cover
  • The best way to determine which dust cap to consider is by taking apart one of the hubs and to get the numbers off the outer bearing and race. You can also get the hub bore inner diameter using dial calipers to get that measurement. I have linked you to our grease cap product page. The dimensions for the Lubed Dust Cap & Rubber Plug, part # DC200L-DCRP, that you referenced in your question are. Outside diameter is 1.99 inches. The inner diameter of the top hole for the rubber plug is...
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  • What Would Cause Grease to Appear All Over Trailer Wheels on 3 Trailers
  • It sounds like the seals have failed and the grease from the bearings has come out during travel. Also it is possible that if you have an EZ lube axle with a grease zerk at the end to add grease but use a single lip seal, the pressure can blow out the single lip seal. If you have mixed incompatible greases they can break down and could some how evacuate the hub. You will want to inspect the seals on the trailers to see if they are the issue. I can tell you what replacement seals...
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  • Are the Kodiak Red Eye Bearing Protectors # KREB1980AC Drive In or Thread In
  • The Kodiak Red Eye Bearing Protectors, # KREB1980AC, are drive in style bearing protectors. They are not thread in bearing protectors. It looks like there are threads on these bearing protectors, but they are simply raised rings/teeth to provide a secure hold in the hub bore. This bearing protector will fit your Kodiak Disc Brake Assembly, # K1HR35D, and will press into the hub bore.
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  • Does The Bearing Buddy Protect the Bearing from Water
  • When the hubs get hot, and then backed into water for unloading, they have a tendency to suck water into the hub. Normal dust caps will not offer much protection. If you are looking for a bearing cap replacement that keeps out water and dirt, then the Bearing Buddy would be what you need to consider. The Bearing Buddy, like part # BB1980A-SS that fits a 1.980 hub bore, also includes the rubber protectors. You would have to either have the outer bearing number, or take an exact measurement...
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  • Determining the Appropriate Bearing Buddy Size Using Bearing Part Numbers and Existing Measurements
  • To determine which Bearing Buddy would fit your trailer you will need either a measurement of the hub on your trailer, or the bearing part numbers. To measure your existing hub it is recommended to use digital calipers to get a precise measurement. The measurement needs to be of the inner diameter of the hub bore. Once you have that measurement then you can choose the Bearing Buddy that is the next size larger. The most reliable method to identify parts for your trailer is via part...
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  • Rubber Covers for Model 1980 Bearing Buddy
  • Yes, the # BB19B would work with your 1980 model of Bearing Buddy protectors. These covers will keep grease where it belongs, and off the tires and wheels of your trailer. These are sold in packages of 2, so please order accordingly for how many axles your trailer has. I have included a link to the part listed above for your reference.
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  • Do Trailer Hub Bearing Buddies Also Work with Inner Bearings
  • A Bearing Buddy allows you to pump grease into the center of the hub all the way back to the grease seal. A double lip seal should be used to prevent grease from blowing out the seal when added. You can pre-pack the bearings if you wanted to but that would negate the function of the Bearing Buddy. The outer bearing is mentioned because that is how the hub bore size is determined.
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  • How Does a Bearing Buddy Get Installed and Removed
  • Installing Bearing Buddies like # BB1781 is fairly straight forward. I have included a link to a video and if you fast forward to about the 5:20 minute mark, our installer puts one on. He lines it up first and gives it a tap to get started. Then he places a block of wood over the end of the Bearing Buddy. The block of wood disperses the force of the hammer used to tap it into place. To remove a Bearing Buddy I would use a rubber mallet and gently tap it on the sides to unseat it.
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  • How Does an EZ-Lube Axle Work
  • On an EZ-Lube axle, the grease gets inserted at the end of the spindle through a zerk fitting and comes out of a hole that should be in between the bearings, filling them both. You would not be able to use Bearing Buddies because the zerk fitting at the end of an EZ Lube axle would interfere with the installation.
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  • Would the TruRyde Grease Cap Plug # RG04-010 work as a Replacement for AL-KO Cap # 568067
  • I did some checking and it looks like the Al-KO cap # 568067 is designed to fit a 1-3/16 inch hole. The Grease Cap Plug # RG04-010 is also designed to fit this size hole so it should work well for you.
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  • How to Determine the Correct Replacement Grease Cap for a 2013 Outback Trailer
  • The best way to determine which dust cap will work for your 2013 Outback trailer is to measure the inner diameter of the hub where the dust cap presses in. This measurement will have to be precise because dust caps come in many different sizes. I recommend using a dial caliper or another precise measuring tool. Once you have the inner diameter, simply select the dust cap that has the same or a slightly larger outer diameter. For example, if the inner diameter of the opening of your...
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  • How to Determine Correct Bearing Buddy for 1991 Lil Rider Boat Trailer
  • You can determine the correct Bearing Buddy for your 1991 Lil Rider boat trailer by checking the part numbers on the existing outer bearing and race. I have attached a photo showing where these parts numbers are typically found. Trailer manufacturers do not necessarily use the same components on all production runs so a check of your existing parts is called for. You can search our site with the bearing number to find the appropriate Bearing Buddy. An alternative method for identifying...
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  • Bearing Protector Grease Cap Installation on a Boat Trailer with EZ-Lube Spindles and Disc Brakes
  • When installing a disc brake kit, like the Titan Disc Brake Kit, # T4843400, on your boat trailer I recommend staying with the original EZ-Lube grease caps, like part # RG04-040. Bearing protectors are not recommended for use with EZ-Lube spindles because the grease zerk in the end of the spindle will interfere with the inside of the bearing protector when pressed into the hub. Grease zerks are pressed into the end of EZ-Lube spindles and are usually very hard to remove. If you were...
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  • Bearing Buddy Bearing Protectors Keep Falling Off Trailer at Highway Speed
  • First, make sure that you have the correct size Bearing Buddy. It should be slightly larger than the hub bore though it is difficult to tell just by looking. If you can tell me the outer bearing number I can determine which is the correct model. Bearing Buddies and other similar products have to be installed just right. If they are off just a little, when the wheel spins the Bearing Buddy can kind of wobble and work itself loose. The do-it-yourself method is to get the Bearing Buddy...
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  • Zerk Fittings Keep Falling Out on Boat Trailer With EZ-Lube Spindles
  • Because the zerk fitting is a press fit, if they are falling out I would recommend simply leaving them out and replacing your existing grease caps with bearing protectors like Bearing Buddies. The Bearing Buddies you need will depend on your hub bore, or the outer bearing number. Once the fittings start falling out, there is not much that can be done to keep them in place. The holes where the zerk fitting was and the holes in the spindle that the grease passed through will not cause any...
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  • Choosing the Correct Dust Cap with a Drive-In Flange
  • At this time we do not carry a 2-1/8 inch diameter dust cap, however, we do have a few dust caps that are close to that measurement. I recommend using a precise measuring tool such as a dial caliper to measure the inner diameter of your hub bore. This will give us an exact measurement to go off of. Typically, when choosing a dust cap, you want to get an accurate measurement of the inner diameter of your hub bore and then choose a dust cap that is slightly larger. The next size dust...
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  • Choosing Correct Bearing Buddy Size for 2001 Coleman Taos Tent Camper
  • The particular bearing buddy you reviewed, part # BB1781, fits a hub bore of 1.781 inches and an outer bearing number LM-11949 Trailer and camper manufacturers may use different components in their products from one production run to another, so the only sure way to know what bearings are used in your Coleman Taos camper is to pull the wheel and hub and check the outer bearing number. Please refer to the photo provided. The next best method is to measure the hub bore using a digital...
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  • What Size Bearing Buddy to Replace 2-7/16-Inch Grease Cap
  • The best way to measure hub bore to determine which Bearing Buddy size you need is with a digital caliper. If you do not own one you may be able to borrow or rent one from a local auto parts store. Your other option is to obtain the outer bearing number from your trailer. You may be able to obtain the bearing number without having to pull it from the spindle; try wiping it clean of grease to see if the bearing number can be read. The size you quoted, 2-7/16 inches, corresponds to...
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  • Bearing Buddy Recommendation for Trailer with Hub Bore of 1.975
  • It sounds like the Bearing Buddy Bearing Protector # BB1968SS is exactly the Bearing Buddy you would need since it is designed for 1.968 in hub bores and your measurement is very close to that. If you wanted to be absolutely sure I would recommend you pull the outer bearing to see what you have. You most likely will have a M-12649 or 07100 bearing, and if you do then the # BB1968SS would be the correct kit for you.
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  • Bearing Buddy Recommendation for a Springdale 179RD with 363180 Al-Ko Bearings
  • From the research I did it looks like the outer bearing of the Al-Ko bearing number 363180 that you referenced is basically a L-44649, which is what the Bearing Buddy Bearing Protectors # BB1980A-SS that you referenced are designed to work on.
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  • How to Determine the Correct Bearing Buddy for a 2013 Carry-On Trailer
  • There are a few ways to determine which Bearing Buddies will fit your 2013 carry on trailer. The easiest way may be to find the manufacturer and model number of the hubs on your trailer. Since it is new, the trailer dealer or manufacturer may be able to give you this information. I did some research on the Carry-On trailers and found that they do use two different brands of axles and hubs, depending on where the trailer was manufactured. If the trailer manufacturer cannot provide this...
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  • How to Pick out Bearing Buddies
  • In order to pick out the correct bearing buddy you will need know the pilot hole of your hub. To do this, remove the wheel and tire and remove the grease cap from the center of the hub. Usually it is a metal cap that is just lightly hammered into place. Use a screwdriver to pry off the cap. Clean the grease off and measure the opening. I have included a video demonstrating the Bearing Buddy. The Bearing Buddies # BB1980A-SS that you referenced are for hubs with a 1.98 inch hub bore.
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  • Will Bearing Buddy Protectors # BB2047 Work with 25x52 mm Wheel Bearings on a Harbor Freight Trailer
  • For your 25x52 mm wheel bearings, the Bearing Buddy Bearing Protectors # BB2047 is a compatible fit. This product fits a 2.047 inch hub bore and will provide your trailer wheel bearings with premium protection by keeping water and dirt out even when completely submerged.
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  • How to Identify Correct Bearings and Bearing Buddies for a 2007 Carson 20-Foot Tandem Axle Trailer
  • Thank you for providing your trailer year/make/model. In order to know the correct replacement bearings and bearing buddies for your trailer we will need the numbers from your current inner and outer bearings. This is the surest way to identify correct replacements. (Trailer manufacturers may use different bearings from one production run to another so checking the bearings themselves is the best way to know for sure). The only other way is to take exact measurements (with a precision...
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  • How to Determine Which Bearing Buddy Bearing Protectors Will Fit a Boat Trailer
  • The best way to determine what size grease caps or Bearing Buddies will fit your hubs is to pull a hub off of the trailer and get the inner and outer bearing numbers stamped into the metal of the bearings. With those numbers I can determine many replacement parts for your hubs including which Bearing Buddies fit. Another way is to measure the inner diameter of the hub bore (where the Bearing Buddies will fit into). You will need to use a set of digital or dial calipers to get the most...
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  • What Size EZ Lube Hub for a 2990 LB Axle on 2008 6 x 10 Carry-On Trailer?
  • In order to add EZ Lube hubs to your trailer you must already have EZ Lube spindles. If your axles do not have EZ Lube spindles these will first have to be welded on by a qualified service technician (welding spindles is not a task that we recommend for the do-it-yourselfer as alignment of the spindle on the axle is critically important). In some cases it may be more cost-effective to replace the entire axle assembly with one that uses EZ-Lube spindles. Another alternative is to add...
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  • Bearing Buddies for a Utility Trailer with 1.810 Hub Bore
  • The closest Bearing Buddies that we have to the 1.83 measurement you have given are 1.81 protectors # BB1810 and # BB1810SS. Depending on how you measured (using digital dial calipers is the most accurate) and because of subtle differences, these may actually be the correct ones. To be sure, I would need to know the inner and outer bearings numbers stamped into the metal of the bearings. You want to make sure you get the correct fit because if they are too small then you will just end...
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  • Using Double Lip Seals in Place of Single Lip when Using bearing Buddies
  • We will need to use a double lip seal when using Bearing Buddies or a similar product. A single lip seal cannot withstand the pressure and you will have a blowout. For a pair of double lip seals use # RG06-020. These are the same size as your 10-9 seals except they are double lip and not single lip.
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  • How to Install Kodiak Red Eye Trailer Bearing Protectors, # KREB1980AC
  • You would install the Kodiak Red Eye bearing protectors, # KREB1980AC, the same way you would install any drive-in style unit. What many people do is take a block of wood, place it on the outboard side of the protector, and use a mallet to drive it in. The wood will distribute the force of the mallet more evenly so it will drive in straight. If it is not straight it could come out when the wheel is turning. You could also use a special tool, # 290-991, that cups the outboard side of...
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  • Is there a bearing Buddy that Measure 1.786 Inches
  • The closest match bearing protectors we have will be either a 1.781 or 1,810. A 1.786 is not available. Make sure you are getting the most accurate measurement of the hub bore that you can. We use digital dial calipers to take these types of measurements. The outside diameter of the bearing protector is usually slightly larger than the hub bore so there is a tight fit. If you do keep coming up with 1.786 the only option we have is grease cap # F001503 that you referenced. Bearing Buddy...
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  • How to Choose a Grease Cap for a Trailer that Does Not Have Grease Caps
  • To ensure that your spindle is not sticking out of your hub farther than it should, I would recommend verifying that all of your bearings and seals are seated correctly and the hub is tightened down correctly. When tightening the hub to the spindle, the spindle nut should be tightened until it is snug and then backed off slightly until the tang washer or cotter pin will fit through the spindle nut. I have attached a photo showing where the bearings and seal should sit on a spindle for...
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  • Does Lubed Dust Cap and Rubber Plug # DC250L-DCRP Have a Zerk Fitting to Add Grease
  • No, dust cap # DC250L-DCRP, is just a hollow dust cap. The rubber plug on the end can be removed to access the zerk fitting on EZ lube axles. For a cap that you can use to fill in grease you will want to look at bearing protectors, see link.
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  • What are Drive-In Grease Caps
  • Drive-in refers to how they install. These caps would get driven in instead of screwed in like oil-bath caps. One way people use to drive these caps in is to use a 2x4 and a hammer. You would push the caps on as much as possible by hand and then use the 2x4 to cushion the blow of the hammer onto the cap.
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  • Replacement Grease Caps for a Trailer Hub with 2-1/16 Inch Hub Bore
  • Instead of measuring the grease cap, measure the hub bore where the grease cap fits. You will need the most accurate measurement as possible so use dial calipers. You may find that you have a 2.047 inch bore so you could use bearing protectors like # BB2047SS. Or it could slightly larger, 2.080 like # BB2080. These are the 2 most likely sizes if you are coming up with 2-1/16 inches but measuring the hub bore with dial calipers would be the way to go.
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  • Bearing Buddy Bra for Bearing Protector on 2008 Shorelander Galvanized Boat Trailer
  • It looks like you are needing the bra for a bearing protector. We do not carry any bras that say Shorelander on them, but Bearing Buddy makes some that would probably work for you. Part # BB17B are 2 inch diameter, and the # BB19B are 2-1/8 inch in diameter.You would need to measure the outside diameter of your bearing protector to determine which bra is the correct one for you.
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  • EZ Lube Grease Cap Recommendation for the Dexter Trailer Hub Assembly # 8-258-5UC1
  • The Dexter Trailer Hub Assembly, # 8-258-5UC1, uses a grease cap with a 1.986 inch diameter. You could use the Lubed Dust Cap and Rubber Plug, # DC200L-DCRP, that you referenced, but that only comes with one grease cap and plug. You may also be interested in the Grease Caps, # RG04-040, which is the same as # DC200L-DCRP, but comes with two grease caps and plugs.
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  • Replacing Zerk Fitting on # BB2441 Bearing Buddy
  • The zerk fitting is a standard size. The fitting is threaded, and is secured by a nut located on the inside of the bearing buddy. You should be able to obtain a replacement zerk fitting from your local auto parts store.
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  • Does Bearing Buddy Threaded Bearing Protectors # BB2080T-SS Fit Reliable Oil Bath Hubs
  • Bearing Buddy does specify that the Bearing Buddy Threaded Bearing Protectors, part # BB2080T-SS, will fit the Reliable oil bath unit that has a 2.080 hub bore size and is on many of the EZ Loader trailers. Bearing Buddy recommends using Permatex or another grease proof gasket cement when installing a threaded Bearing Buddy.
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  • Comparing Trailer Dust Caps # DC200L-DCRP and # RG04-040
  • The difference is the quantity. If you just need 1 you would use # DC200L-DCRP. If you need to replace 2 you would use # RG04-040. To make installation easier you can use dust cap driver tool # 290-991.
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  • How to Remove Bearing Buddy Trailer Bearing Protectors
  • Bearing Buddies like # BB2441 fit very tight into a trailer hub. In order to get them out, you will need to use a rubber mallet and persuade them out. Once the Bearing Buddy starts to unseat from the hub you can grab it and wiggle it out.
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  • Does the Rubber Cap on a Dust Cover Have to be Removed to Fill EZ Lube Trailer Axles with Grease
  • You will need direct access to the zerk fitting to fill the hub with grease. If there is a rubber cap in the way like # DC-RP, then you will have to take it off, fill the grease, and then replace the cap. I have included a link to our FAQ article on grease for you.
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  • How to Choose the Correct Replacement Bearing Buddy Bra
  • The plastic caps for the Bearing Buddy bearing protectors that you are looking for are the Bearing Buddy Bras. We carry three different bras, # BB17B, # BB19B and # BB23B that fit different ranges of Bearing Buddy sizes. You should choose the Bearing Buddy bra that will fit your model bearing buddy. The model numbers that these bras fit are listed on the product page. If you do not know the model of your Bearing Buddy, then you can measure the bore hole diameter on your hub with a precise...
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  • Oil Cap Replacement for Dexter 21-37 Oil Cap
  • I spoke with my contact at Dexter and he said the 21-37 oil cap is obsolete and was replaced with the 21-36 oil cap, # RG04-270. This cap includes the o-ring and plug.
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  • What is the Diameter of Oil Cap Kit # RG04-250 and What Axles Does it Fit
  • The Oil Cap Kit, # RG04-250, has a outside diameter of 3-3/4 inches. It is specifically designed for 10K or 12K AL-KO/Hayes oil bath axles. If you have a different axle, this is not the right cap.
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  • Bearing Buddy Bearing Protector for a 2012 Karavan WCE-1250-46 PWC Trailer
  • The Bearing Buddy Bearing Protectors are designed to work with standard spindles and makes adding grease to the bearings quick and easy. They come in many different sizes so it is important that you use the correct Bearing Buddy for your hubs. I did some research on your 2012 Karavan WCE-1250-46 and it looks like it should have come with the sure lube system. The sure lube system is identified by a grease fitting at the end of the spindle. It is important to know if you have the sure...
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  • Is there a Trailer oil Bath Hub Oil Cap for a Dexter 6,000 Pound Axle
  • The 21-36 oil cap, # RG04-270, fits 9K (after 10/1989) and 10K GD (2 piece drum), and 10K to 15K Dexter axles. The 21-35, # RG04-230, fits 6K to 8K ( and 9K before 10/1989) Dexter axles. It would be too large with its 2-7/8 inch thread diameter. All of these oil caps are for oil bath hubs. If you are replacing a dust cap, you probably have regular hubs. For bearing protectors measuring 2.441 inches, go with the stainless steel bearing Buddies, # BB2441SS, or, if the hub is threaded,...
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  • Trailer Bearing Protector for a Hub with a 2-1/16 Inch Bore
  • I can determine the correct bearing protector if you can provide me with the inner and outer bearing numbers stamped into the metal of the existing bearings on the trailer. Otherwise, I will need the most accurate measurement possible of the hub bore using dial calipers. We do not have a bearing protector that measures 2.0625 (2-1/16 inches) but normally they are slightly larger than the hub bore for a tight fit. You may need a 2.08 like # BB2080SS. Knowing the inner and outer bearing...
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  • How to Determined the Correct Size Bearing Protectors for a 1996 Lowe Shorelander Boat Trailer
  • There are a couple ways to determine what size bearing protectors will fit on your 1996 Lowe Shorelander boat trailer. The first way is to send me the part numbers of your inner and outer bearings and the grease seal. If it is inconvenient to completely remove the hub and retrieve the bearings and seal part numbers, then you could measure the inside diameter of your hub where the grease cap presses in using a precise measuring tool like a dial caliper. The Kodiak Red Eye Bearing...
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  • How Much Grease To Use when Installing Bearing Buddies on a 1997 Jayco Pop Up Camper
  • Your Bearing Buddy instructions are correct. When installing bearing protectors on a trailer hub, you will want to fill the hub with as much grease as possible, so that you do not have to pump all that grease into the hub with the grease gun after installing the bearings and seals. This also helps to prevent pressure build up in the hub and blow out of the seal in the back of the hub. When using a bearing protector you should always use a double lip seal, like part # RG06-020, which...
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  • How to Determine the Correct Replacement Grease Cap for a 2003 Bayliner 212
  • The main difference between the grease caps, # RG04-080 and # DC250L-DCRP, is that the RG04-080 is for EZ lube axles and DC250L-DCRP is for standard axles. I have created a short video for you showing where to measure on your hub to determine the correct size grease cap. If you measure and determine that these caps will work for you, then I would recommend using the RG04-080 if you have EZ lube spindles with a grease zerk in the end of the spindle. Keep in mind that you will want...
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  • What Size Bearing Buddies Will Fit a Harbor Freight Trailer 94564
  • I actually called Harbor Freight about your trailer to determine what size dust cap is used on that trailer. I reached a tech and he stated that the dust cap is 52mm or 2.0488 inches. It looks like the best option is # BB2047 or # BB2047SS . However, you normally want them to be slightly larger than the hub bore to fit snugly. One thousandth of an inch may not be an issue but you need to be aware that it is not exact.
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