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Hayes/AL-KO 12" x 2" Electric Brake Assembly LH

Hayes/AL-KO 12" x 2" Electric Brake Assembly LH

Item # 185100
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185100 - Electric Drum Brakes Redline Accessories and Parts
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Hayes / AL-KO 12" x 2" Left Hand Electric Brake Assembly Call 800-298-8924 to order Redline accessories and parts part number 185100 or order online at etrailer.com. Free expert support on all Redline products. Guaranteed Lowest Price and Fastest Shipping for Hayes/AL-KO 12" x 2" Electric Brake Assembly LH. Accessories and Parts reviews from real customers.
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  • Reviews (8)
  • Q & A (36)
  • Videos (1)
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  • Used (1)
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Redline Accessories and Parts - 185100

  • Trailer Brakes
  • Electric Drum Brakes
  • Redline
  • Brake Assembly
  • 12 x 2 Inch Drum
  • LH
  • Manual Adjust
  • 7000 lbs

Hayes / AL-KO 12" x 2" Left Hand Electric Brake Assembly


  • 7,000-lb Capacity per pair
  • Mounts with AL-KO/Hayes standard 5-bolt pattern
  • Mounting bolts included
  • Driver side
  • Uses 12" hub/drums

K23-537-00 Left Side Brake Assembly for Hayes, AL-KO 12" x 2" electric brakes

Replaces 60208712, K568106.2, and K363233.2

Video of Hayes/AL-KO 12" x 2" Electric Brake Assembly LH

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

Video Transcript for Redline Trailer Brakes 185100 Review

Today we're going to take a look at the Hayes/AL-KO 12" x 2" Electric Brake Assembly for 7000-Pound Axles. This one is the left-hand driver's side assembly. Electric brakes are easier to install and offer more user control than hydraulic brakes. They require only an electric brake controller, which we so sell separately on our website. There is no actuator or hydraulic lines necessary. This assembly is a 12" x 2" driver's side electric trail brake assembly. The driver's side would be the left-hand side.

There's a sticker on it that says "Left hand," so it's marked; but, if that sticker wasn't there, just a quick tip to let you know how to determine what side this goes on. If you look at the length of the brake shoe . See this one It goes from here to here, and this one goes all the way from here all the way up to here. This is the longer brake shoe. This is the shorter brake shoe.

The shorter brake shoe will always face the front of the trailer. With that facing the front, you can see that this is the left-hand, or driver's side, assembly. These brake shoes are lined with an automotive grade friction material. This friction material is fully bonded. It's not riveted to the shoe, so it gives you a lot longer life, more braking torque. The backing plate it's connected to, that's e-coated, so it helps resist wear and corrosion.

Also, if you notice, at the very bottom the 2 adjuster plugs are included. These are nice to have, because it keeps dirt from getting into your brake assembly. If you notice, it is designed to fit the 5-bolt brake mounting flange. If you notice, the hardware is included. The mounting bolts and nuts are all included to install this. Now, a few dimensions on this.

We already mentioned it's brake assembly size 12" x 2". The measurement you're talking about, the 12", would be the diameter straight across. If we put a ruler on that, you can see there's your 12". The 2" would be the width of the shoe itself. If you put a ruler on the shoe, you can see, right at 2", so 12" x 2". The weight capacity is 3500 pounds per assembly; so, when this is matched with one on the passenger side, it would meet your 7000-pound axle capacity. Again, it is for the 7000-pound axles. This is the left-hand driver's side. It does require the use of 12" brake drums. The last thing I want to mention, too . If you notice on the back, there's 2 green wires that come out. You'll need to connect these to get your electric brakes to work correctly. One would go to your brake feed; the other goes to a ground. They're both green, so it doesn't matter. Either wire can be used for either function. That should do it for the review of the Hayes/AL-KO 12" x 2" Electric Brake Assembly for 7000-Pound Axles. This is the left-hand driver's side assembly.

Customer Reviews

Hayes/AL-KO 12" x 2" Electric Brake Assembly LH - 185100

Average Customer Rating:  4.8 out of 5 stars   (8 Customer Reviews)

Hayes / AL-KO 12" x 2" Left Hand Electric Brake Assembly

- 185100

Aloha, I was very impressed with the quality, shipping, and customer service that I obtained when purchasing my trailer brakes. Rest assure I was guided in the right direction on my purchase making sure that I was ordering the correct product for my trailer. I would recommend everyone who is in need of their trailer brakes to seek this company. They are so very helpful in every way with quality products, Mahalo for everything..... :) 320389

- 185100

Great product, it really holds up well under the harsh conditions I put it through 271915

- 185100

Product arrived as scheduled and was perfect fit. Thanks Etrailer! 271688

- 185100

Easy install. Works well for my trailer. Only complaint is provided mounting hardware is sized for 5 hole mount. Had to go acquire 7/16 bolts for 4 hole install. 199296

- 185100

Easy to install, worked with my oddball offset bolt pattern. Drove 1,000 miles halfway across the country with no problems. 171707

- 185100

great product, quick shipping 139471

- 185100

Very prompt delivery. Purchased two left and two right side assemblies to re-do a 1975 Butler tandem axle equipment trailer. The axle flanges on this trailer had the weird offset 4 hole mounting pattern and these fit perfectly. If you have the 4 hole setup, you will need to remove the studs from your old backing plates and press them into these replacements. They do not come with replacement studs, the bolts they supply are for the 5 hole mounting and should not be used in the larger holes that require studs. 122465

- 185100

Rehabbing a '65 Safari. Breaks and electric brake assembly were shot. Ordered replacements from etrailer. Shipment arrived _ahead_ of promised date. Very happy with both the quality of the product and the service received. We'll definitely be ordering from etrailer again! 46492


Ask the Experts about this Redline Accessories and Parts

  • Is Brake Magnet Supposed to Continuously Ride on Armature Surface of Brake Drum
    The brake magnet can indeed be in direct contact with the armature surface of the brake drum, regardless of whether or not the magnet is energized. This doesn't present a problem unless the drum is worn and has grooves in the armature surface. Because the magnet and the armature are in contact, the grooves can transfer to the magnet, making it less effective. This is why we recommend that folks check the armature surface of the brake drum when they replace the brake magnet. In some...
    view full answer...
  • Do Trailer Drums have to be Turned when Replacing Electric Trailer Brake Assemblies
    If the surface on the inside of the drum where the shoe pads make contact isn't smooth then a brake shop may be able to turn the drums. If that surface or the surface where the magnet makes contact (called the armature surface) is discolored then the drum will need to be replaced. In most cases, unless there is damage or discoloration, the drums will not have to be serviced or replaced. If you are unsure then the safest thing to do is take the drums to a brake shop to have them inspected.
    view full answer...
  • Are Replacement Hubs And Drums Required When Replacing Brakes On Older Trailer
    The Hayes/AL-KO Electric Brake Assembly, part # 185100 is designed to replace Kelsey Hayes brake assemblies with 5-bolt mounting pattern, and is used with a 12 inch hub/drum. The # 185100 is used on the left side of the trailer. For the right hand side you need part # 185150. We do not offer any 12 x 2 brakes for 7,000-lb axles that work with a 4-bolt brake mounting flange. The capacity for these brakes is 7,000 lbs for the pair. As far as the drums and hubs are concerned, you will...
    view full answer...
  • Trailer Brake Assemblies that Fit Older Axles that are 12 inch in Diameter and Attach with 5 Bolts
    Based on the dimensions you listed the etrailer.com brake assembly kit part # AKEBRK-7-SA would be your best option. It is 12 inch by 2 inch and has the 5 bolt mounting pattern. I attached a picture that shows the dimensions of the bolt pattern for you to check out as well.
    view full answer...
  • Procedure for Testing Electric Brake Magnets
    First, do a visual inspection. You should make sure that the front of the magnet is not worn to the point where the interior copper windings are visible. Also, check the armature surface (inside rear of brake drum where magnet rides) is free of grooves and replace if necessary. Next, you can test the voltage at the magnet while the brakes are actuated. Turn your brake controller up to its maximum gain, and have a helper apply the manual override switch. If you use a circuit tester like...
    view full answer...
  • Typical Mileage Lifespan from Magnets in Electric Trailer Brake Assemblies
    The three sizes of electric trailer drum brakes you referenced, 7-, 10- and 12-inch diameters, are intended for different axle weight capacities. Since each size will presumably have a proportionate weight load it has to stop, their wear rates will not vary too much. It cannot be generalized that one size or another will last longer because they are all asked to do about the same work relative to their rated capacity. The term "normal driving" means different things to different people....
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  • What is the Size of the Center Hole for AL-KO 12 x 2 Inch 9-Hole Electric Brake Assembly
    I went out to the warehouse and pulled brake assembly # 185100 to measure the center hole for you. I used a set of digital calipers and came up with 3.24 inches so just a hair under 3-1/4 inches. The matching right hand side assembly is # 185150.
    view full answer...
  • Replacement 12 inch by 2 inch AL KO Brake Assemblies
    Thanks for the picture. I was able to determine that you have Al Ko 12x2 inch brake assemblies. For the left hand side you would need the part # 185100 and for the right hand side part # 185150. AL KO assemblies use a slightly different bolt pattern so you have to stick with ones that are made specifically for them.
    view full answer...
  • Will Brake Magnets Or Brake Shoes Wear Out Faster On Nev-R-Adjust Brakes
    I called my contact at Dexter to ask about the Nev-R-Adjust Electric Brake Assembly like part # 23-459. They told me that most brake assemblies wear at different rates. With the Nev-R-Adjust brakes he said they will wear very well and that if they were to estimate the rate of wear for either component, you would probably need to replace the magnets every other time you replace the shoes. They said that is not a hard and fast rule but it is a pretty good estimate. They said you do...
    view full answer...
  • Size of Center Hole on Hayes/AL-KO 12 x 2 Inch Electric Brake Assembly # 185100
    The center hole diameter on the Hayes/AL-KO 12 x 2 Electric Brake Assembly, part # 185100, is 3-1/4 inches (3.25). This # 185100 brake assembly has the standard 5-bolt mounting pattern. For the standard 5-bolt mounting pattern the distance between the bolt holes is 2-1/8 inches on center except for the bottom 2 holes. The 2 bottom holes are 3 inches apart on center.
    view full answer...
  • Do all Trailer Brake Assemblies Wear Out at the Same Time
    The brake assemblies of all axles should wear at the same rate assuming they are all adjusted the same. All of the wheels would be spinning at the same speed and if the brakes are all applying the same braking pressure they would all wear out at the same time. If any of the assemblies are worn then most likely they all are worn, but if you check the condition of all of them and only a few are worn out somehow you would only need to replace the worn out assemblies.
    view full answer...
  • Replacement Grease Cap and Wheel Studs for a RV Trailer Hub with ALKO Electric Brakes
    The grease cap part number that you referenced cross references to a drive in cap with a 2.44 inch outside diameter. If you have a standard cap then the Grease Cap, 2.44 inch OD Drive In, item # RG04-060, is the correct part. If you have a grease fitting in the end of the spindle then the Grease Cap, 2.44 inch OD Drive In with Plug, item # RG04-080, would be the correct part. These parts are correct only if the 092101 part you mentioned is correct. The correct inner and outer bearing part...
    view full answer...
  • Electric Trailer Brakes More Aggressive After Changing Vehicles and Repacking Bearings
    If you were to get bearing grease on the brake pads then they are pretty much done and would have to be replaced because you will never be able to get all of the grease off of them. It doesn't sound like grease is the problem though because the grease would make the brakes not work as well, not make them more grabby. I think the issue might actually not be an issue at all. I think the newer vehicle and brake controller are working a little better than the old one. It also might take...
    view full answer...
  • Will Out of Adjustment Trailer Brakes Cause a Fault Code on the Electric Trailer Brake Controller
    The brake pads themselves being out of adjustment would not cause a fault code to read on your brake controller. You can check the brake pad adjustment by safely raising the trailer and spinning the tire. If you hear a slight lining drag as the tire spins, and can easily spin the tire your brakes are properly adjusted. If the tire is hard to spin or you hear intermittent or no lining drag the brakes should be adjusted. We have a video that shows how to adjust the trailer brakes at the 4...
    view full answer...
  • Brake Assemblies for 1963 Avion Travel Trailer
    To replace your existing brake assemblies on your Hayes axle, you will want to use compatible brake assemblies. I recommend the Hayes/AL-KO 12 in x 2 in Electric Brake Assembly, # 185100 for the left hand and # 185150 for the right hand. These brake assemblies are rated for up to 7,000 pound axles. I've attached a review video of the brake assemblies for you.
    view full answer...
  • Replacement Trailer Brake Assembly that is 12 inch by 2 inch that Has 5 Bolt Mounting Pattern
    We have exactly what you need. You have the 5 bolt mounting pattern so you would want the Hayes/AL-KO 12" x 2" Electric Brake Assembly LH # 185100 for the left hand side and the part # 185150 for the right hand side. This is a 12 inch by 2 inch brake assembly that would work great for you. I attached a review video for you to check out as well.
    view full answer...
  • Electric Brake Assemblies for Brake Flanges on 1971 Horse Trailer
    Electric trailer brakes should be selected based on your axle's weight capacity, which should be listed on a plate or sticker on the axle itself, and of course based on the brake flange mounting pattern. The electric brakes we offer can have 4-bolt, 5-bolt, or 7-bolt mounting patterns. Some have multiple bolt hole patterns, both 4- and 5-bolt such as the Hayes/Alko # 185100, or both 5- and 7-bolt, such as Dexter # 23-451. We do not offer brakes with a 6-bolt pattern, but that does...
    view full answer...
  • Brake System Recommendation for 5200 lb Trailer
    Electric brakes are typically the most cost effective option. I'll link you to an FAQ article that explains the parts necessary to add brakes to a trailer that doesn't currently have them. In order to spec a braking system for you, I'll need some more information: Reference numbers from inner and outer wheel bearings Wheel bolt pattern (see linked article) Confirmation of axle capacity The existing axles will need to have brake mounting flanges in place, to provide a mounting...
    view full answer...
  • Replacement Electric Brake Assemblies for 2006 Keystone Cougar 5th Wheel Trailer
    If you have the standard 5 bolt flange then I recommend using the etrailer.com # AKEBRK-7-SA. These will self adjust so you don't need to do the routine adjustments to maintain the best braking function. If you want the standard brakes you manually adjust, then use # AKEBRK-6 and you can use the adjustment tool # W80630. AL-KO made a 4 Bolt flange for a while so if you have that then you will use the Dexter Electric Brake Kit for 4 Bolt or 5 Bolt Flange - 12" - Left/Right Hand Assemblies...
    view full answer...
  • Availability of Compatible Electric Brakes for Old Travel Trailer with 7000-lb Axles and 6-Bolt Hubs
    We offer several electric trailer brake assemblies for 7000-lb axles, including the Hayes # 185100 which is a left-hand unit that mates with right-hand brake assembly # 185150. These 12 x 2-inch brakes mount to 5-bolt brake flanges. The link will let you see all electric brakes compatible with 7000-lb axles. If your current hubs use bolts to secure the wheels (rather than the more common lug nuts) you may be able to install screw-in studs in the hub's threaded holes that will then allow...
    view full answer...
  • Is Voltage Drop Normal When Testing Brake Output Wiring of Trailer
    You really should have around 12 volts at the junction box and then about the same at the axles. That amount of voltage drop is most likely due to using wire for the circuit that is too light. Especially since you said you have three axles. I'd replace all of the trailer wiring for the brake output circuit with 10 gauge wire like part # 10-1-1 (sold by foot) or heavier if possible and the decreased resistance will allow the voltage to be where it needs to be. You'll probably notice much...
    view full answer...
  • Is Hayes Al-KO Assembly part # 185100 Just the Brake Assembly
    The Hayes Al-KO Assembly part # 185100 that you referenced is just the brake assembly and does not come with a drum as well. You'd have to pick that out separately. I'd need to know what bolt pattern your current wheels are as well as the dimensions of your trailer spindle or the old bearing numbers.
    view full answer...
  • Replacement Al KO 363233.1 and 363233.2 Brake Assembly Availability
    We have what you are looking for. For the part 363233.1 you are looking for the # 185150 and then for the 363233.2 you would want the part # 185100. These are the exact same as the parts you are looking for. These are 12 inch by 2 inch assemblies with a 7,000 lb capacity.
    view full answer...
  • Brake Assembly Replacement Recommendation for Al-KO 7k Trailer Axles
    Are the brake assemblies 12 inches in diameter and have 5 bolt that secure it to the mounting flange? If so, this is what you need. For a 7,000 lb AL-KO axle you would want a Hayes/AL-KO brake assembly # 185150 for the right side and a Hayes/AL-KO Brake assembly part # 185100 for the left side.
    view full answer...
  • Selecting Correct Replacement 12 x 2 Electric Brake and Drum Assembly for 6000-lb Axle
    The best way to identify the correct replacement components for your trailer is by using the part numbers from your current inner and outer bearings and grease seals (or a spindle measurement where the seal and bearings ride). It is possible to measure the spindles to obtain grease seal dimensions (location B on the photo) but this process requires care and a precision digital caliper like # PTW80157. You will also need to confirm the diameter of your wheel studs. We already know your brakes...
    view full answer...
  • Availability of Old Round-Style Brake Magnets for Hayes 12 x 2 Electric Brakes
    If your trailer has pre-1988 Hayes electric brakes that use the round-style magnets you will have to replace the entire brake assembly. Until a few years ago the old-style round magnets were still available as replacement parts but they are no longer offered. It will therefore be necessary to update your trailer with new brake assemblies. In your case you will also need to replace your hubs/drums in order to use these new brake assemblies. Replacement hubs/drums need to be matched based...
    view full answer...
  • Replacement Brake Assemblies for 7K Axle on RV Trailer
    According the the photo you kindly provided, you need Hayes/Al-KO 12x2 brake assemblies, part # 185100 for the left side and # 185150 for the right side. This assembly will work with an axle that has the AL-KO 4 bolt pattern or the standard 5 bolt. If you can crawl under your trailer, you should be able to see the brake mounting flange from the rear, and see how many bolts it has. I can understand your reluctance to start disassembling things until you have everything in place, but...
    view full answer...
  • Can Dexter Electric Drum Trailer Brakes Replace AL-KO Trailer Brakes
    We actually have 12 x 2 inch electric drum brake assemblies that are replacements for the AL-KO brake assemblies. Take a look at Hayes/AL-KO 12 x 2 Electric Brake Assembly, # 185150. This is the right hand assembly. The left hand assembly is # 185100. The Nev-R-Adjust Electric Brake Assembly, # 23-459, will fit provided that the bolt hole pattern on the brake mounting flange matches your existing set up. It should have a 5 on 3-7/8 inch bolt pattern, like flange # 4-44-1, to work.
    view full answer...
  • Recommended Drums For Hayes Axle On 1983 Carriage Conestoga Fifth Wheel Trailer
    There are a couple things going on you can check. First, your shoes may be adjusted out too far and that is what is causing the fit issue with the drum. You will want to adjust the brakes so that they are not expanded as much and see if that helps. If you are going to replace the drums you will need to know the bearing and seal sizes that fit your spindles. I have attached a photo that shows where the numbers can be found on your old bearing and seal and make sure they are a match with...
    view full answer...

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Condition: Missing Parts

Notes: Missing mounting hardware, otherwise new and unused

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