Replacement Magnet Kit for 10" Electric Trailer Brake Assemblies - 3,500 lbs

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• Should Brake Magnet Chatter if Retaining Clip is Broken
  Regular "chatter" is not a common problem and since the magnet is damaged I strongly recommend replacing it with the Replacement Magnet Kit for 7" Electric Trailer Brake Assemblies # AKBRKR-M7.
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• Are Electric Trailer Drum Brakes Polarized
  You asked a good question. No, electric drum brake magnets are non-polarized, meaning that either of the two leads can be used for grounding to the trailer frame or for connection to the trailer brake controller circuit. This is why brake assemblies and replacement magnets have the same wire color for both leads. You'll want to use 10-gauge wiring for connecting the brake assemblies to the trailer's brake circuit. We offer part # 10-1-1 which is sold by the foot.
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• How to Disconnect Electric Drum Brake from 5th Wheel Trailer Brake Circuit
  An electric drum brake's magnet wires are non-polarized so to disconnect a bad brake assembly from the 5th wheel's brake circuit you can cut either one of the wires leading from the magnet. Once you get the brake repaired you can reconnect the wiring using butt connectors # DW05745-5 and dielectric grease # 11755 to block moisture from entering the connectors. I also linked two articles concerning electric drum brakes that might be helpful to you, as well as our main page that shows...
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• Are Electric Drum Brakes Safe to Submerge and Use on Boat Trailer
  It's no secret that water and electricity do not do well together. That being said, improvements in wiring insulation and heat shrink connectors have made it more and more common for boat trailer manufacturers to use electric brake assemblies instead of the traditional disc or drum hydraulic brakes, which are less cost effective. While electric brake assemblies and the components inside of them, like the # AKBRKR-M10 magnets are not waterproof, they can handle being submerged under water...
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• Replacement Magnet Needed for 10" Brakes on a 1986 Holiday Rambler Alumalite Trailer
  We have 2 different options for a replacement magnet for 10" brakes. I recommend getting the one that has the closest dimensions to what you currently have but either one should be just fine: Replacement Magnet Kit - # AKBRKR-M10 (2" long x 3-1/8" wide x 1" tall) Replacement Magnet Kit # BP01-110 (3-1/2" long x 2-1/8" wide x 7/8" tall)
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• How to Test Brake Magnet Amperage on a Trailer with 4 Brakes
  There are a few different tests that can be done to check the brake magnets individually and as a whole on your trailer. I would first recommend checking the magnets for wear before going on to test for proper amperage. If the magnets show abnormal wear or if you can see the windings beginning to show through the friction surface of the magnet then they will need to be replaced. Testing the magnets as a whole will involve using a multimeter, that can read up to 20 amps, to test the amperage...
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• Can Trailer Brake Assembly Magnets be Grounded to Trailer Frame
  You should be able to ground the brake magnets to the frame of the trailer and have them work fine. Or you can try running a jumper wire back from the ground wire of the magnet back to the main ground of the trailer frame. If you are getting 12 volts into the magnets but they aren't working the problem is that the ground wire isn't properly grounding.
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• I Rewired My Trailer and the Brakes Do Not Work
  Poor or intermittent brake performance can be a result of a few different issues. Poor ground connections, corrosion build up and shorts are the most common culprits. If you are certain that all of your grounds are good, then I would look at the trailer connectors for white or green corrosion build up and clean or replace as necessary. I would also look at the electric brake power wire for any pinched, frayed, or damaged sections that could be causing a short. We had a similar issue...
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• Recommended Brake Magnet Sets that are Compatible with 10 x 2-1/4 Inch Brake Hubs
  The brake magnet that will work with your ALKO 10 x 2-1/4 inch brake hubs, that I recommend is the # AKBRKR-M10. Included with this brake magnet is the retaining clip and spring. The way the brake magnet works is when power is fed to this magnet it's magnetized and will come out and stick to the inner surface of the hub and drum assembly, which will in turn pull the brake arm. Self adjusting will have additional components that keep proper tension on the shoes so you don't have to manually...
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• Replacement Brake Magnets, Bearings and Seals for Al-Ko 3500-lb 8490 Hubs
  We do carry a range of replacement trailer brake magnets and you can use the link provided at right. The best and easiest way to find replacement bearings and seals is to obtain the part numbers from the original parts. My research on your Al-Ko hub 8490 did return results but I could not confirm the bearing set or seals that fit the spindles for this hub. The linked photo shows the typical appearance and location of these part reference numbers. You can search our site directly with...
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• How Many Magnets Are Included with the Replacement Magnet Kit for 10" Electric Brakes
  The Replacement Magnet Kit for 10" Electric Trailer Brake Assemblies part # AKBRKR-M10 only comes with one magnet. Therefore, you will need to order a quantity of two per axle. However, it looks like you have a round magnet not an oval one like the above. Therefore, in order to replace just the magnet we have part # BP01-068 for 7" x 1-1/4" and 10" x 1-1/2" braking assemblies. In regards to the wear on the inside face of your drum, this is not really something that can be resurfaced...
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• Noise from Newly Installed Electric Brake Magnets and Drums on Travel Trailer
  Thank you for your recent purchase from etrailer of brake magnets and hub/drum assemblies. New components will often result in a different sound than what we are accustomed to but there are a few things you can check. If you are referring to any humming type of sound from the magnets this is normal. If the brakes otherwise operate properly and you are hearing scraping sounds this may simply be due to the new parts needing either some break-in or adjustment. If the brakes are making...
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• How to Wire Electric Trailer Brake Magnets to 12 Volt Brake Output and Ground
  No, it does not matter which wire from the magnet is attached to power or ground. Just make sure one wire is properly grounded and the other wire is attached to the electric brake output circuit from the trailer connector. I have linked a video that details replacement and wiring of a trailer brake magnet that should be helpful.
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• Which Wire On the Trailer Brakes is Power And Which One is Ground
  Yes one of the wires will be used for the ground connection. When connecting the wires from the trailer brakes it does not matter which wire you use for the brake feed or ground, the magnet works either way. Just be sure that the wires are clear of any moving parts and that the brake feed is attached to one of the wires and that the other is attached to the trailer frame for a good ground.
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• Will Rust Buildup Prevent Brake Magnets from Functioning in Electric Trailer Brake Assemblies
  Excessive rust would definitely weaken the pull of the magnet, so I would recommended replacing the magnets on your trailer if they are severely corroded. If you have power going into the magnet and it is not engaging at all, this again would be an indicator that the magnet needs to be replaced. I would recommend cleaning your hub drum also when you are checking the magnets--some light sandpaper would work well. I have provided a link below to the trailer magnets we currently...
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• Brake Magnets for Bigfoot Trailer
  The correct brake magnets for your Bigfoot trailer are going to depend on the size of your brake assemblies and weight capacity of your axle. For example, Magnet Kit # AKBRKR-M10 is for 10" brake assemblies with a 3,500 lb axle rating. I have linked our page with each of our brake magnets for you to take a look at.
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• How to Determine What Size Brake Assemblies You Have
  The easiest way to determine exactly what brake assembly you have is to take the hub and drub off of your axle an measure the diameter of the inside of the drum and then measure the depth. This will tell you what size brake assemblies you need. I attached a picture that shows these two dimensions. Between the two sizes you listed I would imagine that you have the 10 inch by 2-1/4 size since we do not carry any 10 inch by 1-1/2 inch assemblies.
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• Troubleshooting Trailer Brakes That Do Not Activate
  The first and easiest part to troubleshoot will be the wiring. I would start by using a circuit tester like part # 40376 on the brake output pin on the trailer connector while activating the manual override on the brake controller to see if you are getting any output at the connector. If you are getting power at the connector then I recommend testing the wires just before the brake assembly to ensure that the power is reaching the brakes. If there is no power then there may be a wiring...
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• Troubleshooting Malfunctioning Trailer Brake Magnets
  You'll need to do a full troubleshoot. With the trailer unplugged, use a voltmeter on the brake pin on the trailer connector while the manual brake switch is actuated. If you have a time delayed controller, you should also get voltage on that pin with the brake pedal pressed. Next, plug the trailer in, and check the voltage on the output circuit as close to the magnets as you can get. With the gain on the controller turned all the way up, you should get around 12 volts at the magnet when...
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• Brake Magnet Replacement Recommendation for a 2007 Dutchman Camper with 10 in Brake Assemblies
  Yes, the fact that your brake assemblies are 10 inch diameter assemblies the Trailer Brake Magnet # AKBRKR-M10 that you referenced would work for you. I attached a replacement video of a similar item for you to check out also.
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• Troubleshooting Trailer Brake Wiring on a Trailer
  The two wires coming from your brake assemblies on your hub are for the brake magnet. One wire is ground and one wire is for power from the brake controller. It doesn't matter which wire goes to what in this situation. Take a look at the video at the 5:45 mark about how to wire up the trailer brakes I included for you too.
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• Replacement Electric Drum Brakes for Dexter 3500-lb Axle
  I recommend replacing the entire brake assembly on your 3500-lb axle if the magnet is so badly corroded that it is now stuck to the actuating arm. We offer cost-effective brakes # AKEBRK-35R-SA and # AKEBRK-35L-SA that are rated appropriately for your Dexter axle. If you prefer to repair it you might try a commonly-available aerosol solvent like PB Blaster or WD-40, but you'll need to take care that none of that lubricant gets on the pads or elsewhere. Allow it to soak in, preferably...
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• Should There Be Power on the Ground Wire for a Brake Magnet
  There should only be power entering the brake magnets, not leaving them through the ground wire. I would first start off by regrounding each brake magnets to a new bare metal surface separately of one another and as close to the brake assembly as possible. Once the above has been completed and the problem still persist then it may be time to replace either the magnets or the entire braking assembly. In order to offer replacement brake magnets I would need to know the brand of brakes...
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• Electric Trailer Brakes on a Jayco Trailer Lock Up Frequently
  Most trailer brake magnets for 10 and 12 inch brake assemblies should draw 3.2 to 4.0 amps at 12 to 13 volts. On a 7 inch assembly it would be 3.0 to 3.2 amps. Since the magnets you have are drawing up to 5.0 amps there is something not quite right with the magnets and they will likely need to be replaced. I have included a link to our help article that explains how to test brake magnets and a link to the magnets we carry.
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• Where to Connect Electric Trailer Brake Controller Red Wire on a 2007 Ford Ranger
  Sometimes, finding and/or connecting to the correct stop light wire on the brake switch can be difficult. There are other places where you may be able to tap into in order to get the correct wire. If your 2007 Ford Ranger has a third brake light on the cab that only comes on when the brake pedal is pushed then you can tap into that wiring. If your brake light signals are separate from the running lights and turn signals, you could tap into the wiring behind the taillight. The best place,...
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• Replacement Brake Magnet and Tire/Wheel Combo for a 1964 Shasta Compact Camper
  I am guessing that your axle weight rating is either 2,000 lbs or 3,500 lbs. You should be able to verify this by looking at the tag/sticker near the trailer tongue or by finding the weight rating stamped in the middle of the axle. We do have replacement brake magnets for each. Simply check to see if you have 7" brake assemblies or 10" assemblies and then use part # AKBRKR-M7 or # AKBRKR-M10 respectively. Since the wheel in your picture has a 4 on 4" bolt pattern I am guessing that you...
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• Replacement Brake Magnets for 10 Inch Brakes on 3500 Pound Trailer Axles
  Based more on the testing you have done than the appearance of the magnets I would say that they would need to be replaced if there isn't a wiring issue somewhere. You can use your meter to make sure that the proper voltage is on the wiring. For 1 replacement magnet for a 10 inch brake assembly I recommend # AKBRKR-M10. It comes with a replacement spring and clip also. I have linked a video review of this magnet for you. I have also linked our help article on testing brake magnets.
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• Replacement Brake Shoes and Magnets for 2800-lbs Welded On Dexter Hubs
  To replace the shoes and magnets on your welded on hubs you can use the # BP04-065 you were looking at since you've got 10-1/4" brakes. For the magnets, you'll want to use the Replacement Magnet Kit for 10" Electric Trailer Brake Assemblies - 3,500 lbs # AKBRKR-M10. If you also need to replace the springs, you can use the Replacement Brake Spring Set for Dexter 10" x 1-1/2" Electric Trailer Brake Assembly # K71-362-00. There is also a brake adjuster available for these brakes with the Brake...
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• Troubleshooting Brake Controller E2 Error Code
  The Hopkins Agility Trailer Brake Controller # HM47294 you asked from is most likely too new to get that E2 code like the older models (it would be SC instead) according to my tech contact at Hopkins. With either the SC or the E2 code, it is showing a short in the blue output wire somewhere between the controller and the brake magnets. This can be due to a pinched or broken wire, a bad ground wire, or it could be from a bad magnet as you stated. I recommend using a circuit tester...
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