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Dump Door Hinge - Steel

Dump Door Hinge - Steel

Item # PLR1904-Z
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Dump Door Hinge - Steel Door Hardware PLR1904-Z
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Polar Hardware Enclosed Trailer Parts - PLR1904-Z

  • Doors
  • Ramps
  • Door Hardware
  • Ramp Hardware
  • Hinge
  • Dump Door Hinge
  • Polar Hardware


Steel dump door hinge for ramps or heavy access doors.

  • Bracket and leaf constructed of 1/4" thick steel
  • Plain finish for easier welding
  • Comes with grease fitting for long life & smooth operation

1904-Z Polar Hardware Dump Door Hinge - Steel





Video of Dump Door Hinge - Steel

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Polar Hardware Enclosed Trailer Parts - Doors - PLR1904-Z Review

Today we're going to be taking a look at a dump door hinge from Polar Hardware. This door hinge is designed for ranch or heavy access doors. It's also known as a barn door hinge. The bracket and leaf are constructed of 1/4 inch thick steel. Very strong, durable, design. It does have a plain, also known as a raw finish, which is going to allow for easier welding when it comes to the installation.

The bracket is the portion that gets welded to the trailer. The leaf, or plate, gets mounted to the door. It does come with a grease fitting. That's a Grease Zerk fitting for longer life as well as smoother operation. What you can do is, you can frequently pump grease in by attaching a grease gun. Pump the grease in.

That's going to lubricate the pin, or that bolt that runs through. It's going to allow for easy operation, and overall it's going to extend the life of the hinge. In this position, so this would be what's considered the mounted position with the door in the closed position. If we measure from the back of the bracket to the end of the plate, in this position, that's going to give us a measurement of about 4 inches. If it's a little bit more squared off like as if it was actually installed, we're looking at a length measurement of right around 4 inches going that direction. That's measuring from the back of the bracket to the end of the plate.

If we stretch it all the way out to where it's as flat as can be, and go edge to edge, that's going to give us a measurement of something a little bit closer to 5 inches long. The plate portion. This is going to have a width measurement of 2 7/8 of an inch. Again, 1/4 inch thick steel. If we measure that flat side right there, that's going to give us a measurement pretty close to an inch and a half, right in that area, as you can see. Maybe 1 9/16 of an inch.

The bolt, that's going to give us a length measurement from end to end of 4 3/4 of an inch. The bracket, that's going to measure 3 5/8 by 1 inch. That's going to do it for today's look at the dump door hinge from Polar Hardware.


Customer Reviews

Dump Door Hinge - Steel - PLR1904-Z

Average Customer Rating:  4.8 out of 5 stars   (62 Customer Reviews)


- PLR1904-Z
by:

These hinges are great. I welded 2 of them onto each side of my custom barn doors on my dump trailer. The doors also fold down for a ramp. I ran my 11,000lb skid steer up the ramps and these hinges did end up bending or flattening out a little. So I cut them off and reinforced them a little with a side gusset plate so they couldn't stretch. I have since added 2 more on each side for added strength. Needless to say, they are built very well, grease zerk too. I would recommend them. 745773



- PLR1904-Z
by:

Great parts, fast shipping, we use etrailer for all our trailer projects 728855



- PLR1904-Z
by:

When installing drop down gates on a trailer or deck, these are handy little hinges. They weld easily, move smoothly, and with the lube zerk fitting, should last pretty well. My installation is on the rear of a tilt down trailer deck, with a "2x4" steel rear gate that drops down to drive over for loading. These hinges look strong enough to hold up to the job. 560728


Comments
All is good one year later! Tilt deck trailer and flip down back gate that gets driven on by cars and tractor. Hinges have held up well as have my welds!. Very versatile and useful hinges.
Carl - 09/01/2019

60672

- PLR1904-Z
by:

These worked Wonderful cut the old bent up ones off tacked up the new ones and bam job done !! 715816



- PLR1904-Z
by:

Product shipped in a timely manner and was exactly what we were looking for to make the necessary repairs. 508659



- PLR1904-Z
by:

I have not done a review before; however the shipping and the quality of the items is unbelievable it force me to make the time. I am not making this statement based on just one order but on three over the last year. So with this statement etrailer.com is now the first place that we look. The promptness of the shipping is fantastic. On a scale from 1 to 10 on the shipping & quality they both are a 10! As for the price, they are very very good, you may save a buck or two but the quality is well worth every cent and when towing equipment id rather be safe than sorry!!!! 344888



- PLR1904-Z
by:

Wow! This little hinge is amazing! Please buy 50 of them right now! Stock up! The apocalypse is coming and you will need these. The picture is my backhoe and has absolutely nothing to do with this part. 664160


Comments
Nice backhoe! It looks like youre well-equipped for any future apocalypse!
-- Mike L - 07/01/2019

57343

- PLR1904-Z
by:

I own a custom shop where we work on furniture and fixtures mostly for restaurants and bars - so I may not be the typical customer looking for trailer parts, but I do have a fair amount of experience in fabrication. These hinges are going into a large sign out front of a high end restaurant holding a steel door and will see a good amount of use. The pics on the site looked ok, but when the hinges showed up at my shop, I don't know how eTrailer puts out this level of quality at this low of a price. Hope they don't catch on to how great of deal these are ! Lol. I'd recommend these to anyone looking for rock solid greaseable hinges. 574973



- PLR1904-Z
by:

I used these hinges to attach a spare tire rack to the back of our Toy Hauler. The effort of crawling under a trailer and wrestling a 70 pound spare tire out didn't make sense. So I attached a set of these to a tire carrier for a Chevy Astro Van. Bolted it all together and still have easy access to the back garage door/ramp. 541900


Comments
Absolutely great!
Larry A - 07/15/2019

57820

- PLR1904-Z
by:

Very nice hinges! well made and will have many uses in my industrial facility! 766960



- PLR1904-Z
by:

Works great and you can lube hinges old one could not be lube unless you took them apart 764262



- PLR1904-Z
by:

Product should function as expected, however we were disapointed in how rusty the product was when it arrived. Not a huge issue but we were expecting a product that was a little more ready for finish. 748851



- PLR1904-Z
by:

Heavy Duty hinge. Easy to weld and align. Reasonable price formality product. 747177



- PLR1904-Z
by:

Cam latch and dump gate 270 hinges worked out great. Delivery was on time! 746420



- PLR1904-Z
by:

Shipped really fast! Exactly what I w anted! 716503



- PLR1904-Z
by:

Product is working well and as intended. Thank you. 704353



- PLR1904-Z
by:

Used to put a new gate on my dump trailer. Very good quality and has held up over the year. As always great customer service from etrailer! 699032



- PLR1904-Z
by:

Your product worked out great. If I need future products from e- trailer I will order from you guys. Just perfect. You guys did good !!! Thanks again !! But the way, hinges were used to build a enclosed trailer ramp on a 5x10 trailer. 682498



- PLR1904-Z
by:

Was in need of a set of hinges for my dump trailer, first place i thought to look was etrailer. Found them ordered them , perfect fit! Thank etrailer! 679298



- PLR1904-Z
by:

Nice hinges fast shipping 669947



- PLR1904-Z
by:

This part is a great design and will be great for my application. This part came with sharp edges and splatter from the welding. I will need to clean this up before installing these. If they came in better shape I would have rated these 5 stars. 667893



- PLR1904-Z
by:

So far they appear to be heavy duty. Good quality product 667237



- PLR1904-Z
by:

Nicely Built product. Fast shipping. Should weld onto the the dump trailer gates easily and hold up for a long time, includes grease fittings built in. 662945



- PLR1904-Z
by:

Service was great. Parts arrived very q uickly. 657105



- PLR1904-Z
by:

Nice heavy duty door hinge. Easy to weld on. 628511


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Ask the Experts about this Polar Hardware Enclosed Trailer Parts

  • Door Hinge Bracket with 4 Inch Width
    We don't have exactly what you are looking for. The # PLR1904-Z you referenced is 3-1/8 inch without the strap. The best other option is the Ramp Door Hinge - Steel # PLR1902 which utilizes as different hinge style and welds flat. It is 4 inches wide but without the bend. These are the only ramp door and dump door hinges we carry.
    view full answer...
  • Ramp Hinge PLR1902 For Making Swing Out Trailer Barn Doors
    The Ramp Door Hinge # PLR1902 that you referenced could swing out as far as you are needing so it would work well for you. The slide door bar lock assembly part # 305736 can also be cut down as needed as well. Then for a mechanism to lock the door open you could use a rubber socket and plunger set like the part # PLR64-66.
    view full answer...
  • Does Dump Door Hinge PLR1904-Z Have Weight Capacity
    The Polar Hardware Dump Door Hinge, Steel # PLR1904-Z that you referenced does not have a weight rating. I spoke with my contact at Polar, and he confirmed that they do not have a weight rating for this hinge. The capacity of this hinge will largely depend on the installation and how the hinge is welded. My contact at Polar confirmed that the hinge is constructed of 1/4 inch thick steel and has a pin with a diameter of 1/2 inches. While speaking with my contact at Polar, I mentioned the...
    view full answer...
  • Dimensions of the Polar Steel Dump Door Hinge PLR1904-Z
    I took a piece of the Polar Steel Dump Door Hinge # PLR1904-Z from our warehouse so that I could take a series of measurements for you. I have applied these dimensions to the linked photo, which will be added to the item's product page. Both the bracket and leaf portions are made of 1/4-inch thick steel with a raw finish. This item includes a grease zerk fitting to simplify the process of adding grease to the hinge by using a grease gun such as # L30132.
    view full answer...
  • Can Bolt of Dump Door Hinge # PLR1904-Z Be Removed
    Not super easily as it wasn't designed for that to happen regularly, but the bolt of the Dump Door Hinge # PLR1904-Z could be removed and the two pieces of the hinge could separate.
    view full answer...
  • What is the Weight Capacity of the Polar Hardware Dump Door Hinge?
    The Polar Hardware Dump Door Hinge, Steel # PLR1904-Z that you referenced does not have a weight rating according to my contact at Polar. The installation will largely dictate the weight this hinge will be able to handle. This hinge is made of 1/4 inch thick steel, so you most likely will be held to the strength of your weld on the 1 inch wide bracket. I've attached a video to help further.
    view full answer...
  • Dimensions of Polar Steel Dump Door Hinge PLR1904-Z
    Most dimensions of the Polar Steel Dump Door Hinge # PLR1904-Z do appear on the photo from our website, which I linked for you, but I also went to our warehouse and measured the item to give two additional dimensions. These are shown on the second photo. If you need another dimension please feel free to tell me which specific measurement you need.
    view full answer...
  • Hinge Recommendation for Converting Gate of Dump Trailer to Barn Doors
    I recommend part # PLR1904-Z. This is a barn door hinge for dump trucks and is made of 1/4 inch steel. I don't have a drawing or install instructions I can send you, but if you take these hinges to a qualified fabricator in your area he would be would able to install them on your trailer without needing instructions.
    view full answer...
  • Can Barn Doors of Trailer Ramp be Changed to Ramp Door
    Most likely it's possible but the level of modification you'll need to do is hard to say. We have ramp door hinge kits like the part # PLR1904-Z which you'd weld to the back of the trailer and then attach a ramp door to. But most likely you won't be able to reuse the barn doors and you'll have to come up with a ramp.
    view full answer...
  • Replacement Hinge Recommendation for MAXXD Dump Trailer
    That's a pretty hard question to answer, but most likely the Dump Door Hinge # PLR1904-Z that you referenced would be exactly what you'd need. This hinge setup is very heavy duty and basically can be made to work on any standard dump as long as you have access to a welder.
    view full answer...
  • Does Polar Hardware Dump Door Hinge, Steel # PLR1904-Z Have Weight Capacity
    The Polar Hardware Dump Door Hinge, Steel # PLR1904-Z that you referenced does not have a weight rating according to my contact at Polar. The installation will largely dictate the weight this hinge will be able to handle. This hinge is made of 1/4 inch thick steel, so you most likely will be held to the strength of your weld on the 1 inch wide bracket.
    view full answer...
  • Recommended Hinges And Ramp Assist For Steel Ramp
    For your ramp, I recommend a hinge like the Ramp Door Hinge - Steel # PLR1902 or the Dump Door Hinge - Steel # PLR1904-Z. Both of these have a built in zerk grease fitting. Then you can use springs like # RS16933RH and # RS16933LH. If you want further help in lifting and lowering, I recommend the Rack'Em Double Barrel Utility Trailer Tailgate Lift Assist w/ Chain - 200 lbs # RA-27C that can be used on either side or both.
    view full answer...
  • Recommendation for Trailer Ramp Hinge that Can Handle a 500 Pound Motorcycle
    For your ramp and 500 pound motorcycle I recommend using a couple of ramp hinges, # PLR1902, sold in quantities of 1. This is a heavy duty ramp hinge and has a grease fitting so you can easily keep It lubricated. I am not sure how wide your ramp is or the available space you have to mount a hinge but the overall length of this hinge is 8-3/16. For something a little shorter we have dump door hinge # PLR1904-Z which is under 5 inches wide. I have linked videos on both of these hinges for you.
    view full answer...
  • Recommended Replacement Hinges For Barn Doors On Dump Truck
    We do offer a hinge that may work well for you. I recommend part # PLR1904-Z. This is a barn door hinge for dump trucks and is made of 1/4 inch steel. This has a smooth surface that is designed for welding. I have also attached a photo of this hinge you can take a look at. I have also attached a photo of the four strap hinges that might work for you. As you can see, these have holes drilled in them so they can be bolted in place for both the door and the trailer. If you choose a hinge...
    view full answer...

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Info for this part was:

Expert Research:
Jameson C
Expert Research:
Adam R
Installed by:
Cole B
Written by:
Amanda M

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