How Thick Should Brake Shoe LIning Be On A 3,500 lb Axle

Question

Question:

Hi, can you tell me how thick the brake lining should be on 3500lb axel with electric brakes? I think they are Dexter brand.

asked by: John H

1

Helpful Expert Reply:

Hey John, thanks for reaching out. The brake shoe lining on a 3,500 lb axle brake assembly should be like 0.18" when brand new. Dexter recommends replacing the shoes when they get down to about 0.0625 or 1/16". Let me know if you need anything else.

expert reply by: Jesse M

1

Jesse M.

11/17/2025

Hey John, how did things go checking the brake lining thickness on your 3,500 lb Dexter axle? Your update could make it easier for the next person working on the same brakes.

Answer 1

To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. The most common size is 2-1/4 inch wide like the #T4071600-500 that you…

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Answer 2

On Dexter 12" Nev-R-Adjust Electric Brake Assembly #23-458 the shoe pad thickness is 3/16 of an inch. Dexter says that you should replace the shoes if the material gets down to 1/16 of an inch thick or less.

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Answer 3

Typically as long as you're staying at or below 200 degrees you're doing fine. The fact that one hub is hotter than the other could just mean that you had more weight over that one hub or that the brake setting was more aggressive on that hub…

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Answer 4

Though I was unable to find out anything about your current 12534 motor, we may still have a more heavy duty option available for you. The Lippert HD 6,500 lb Motor #LC196308 will fit the standard gearbox that is on most landing gear, like the…

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Answer 5

Given the issue you described and the fact that you have done a good job of troubleshooting and checking other potential sources for the issue, it sounds like the motor is going bad. Since you mentioned the landing gear working fine for a little bit…

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Answer 6

Hey David, thanks for reaching out! A new motor like the Tuson High Speed 5th Wheel RV Landing Gear Motor #TUS57FR could definitely improve the performance of your landing gear, but before replacing the motor I recommend trying to manually operate…

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Answer 7

Hey Michael, so based on what you mentioned it sounds like you have a standard Lippert/Venture/LCI style landing gear and you have the 5,500 RPM motor. We do have a higher RPM motor that you can replace it with with the part #LC141893 which turns…

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Answer 8

The price difference does seem backwards, but the faster speed part #LG-141893 has the same weight capacity as the lower speed part #LG-142178 that you also referenced. It's a difference of 5,500 RPM and 7,140 RPM so you would definitely see a…

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Answer 9

We have the same part number basically twice through two different vendors here that are the exact replacement motor you are looking for. The Lippert part #LC142178 and the Stromberg part #LG-142178. They are the exact same motors and if I were you I…

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Answer 10

The part number 125340 you referenced is actually a motor, and the correct replacement for that is Replacement Motor #LG-142178. However, since you mentioned gears in the gearbox, you will need to replace the entire thing, which for your landing gear…

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Answer 11

In case you want to just service your existing Venture VMC940 5th wheel landing gear driver leg you can use gearbox #LG-179015. For a complete replacement lead jack use Replacement Lead Jack with Drop Leg #LG-179013 which is a universal fit that…

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Answer 12

The correct gear box to replace a Venture VMC940RB is the Replacement Gearbox for Venture Aluminum Electric 5th Wheel RV Landing Gear Assemblies #LC276602.

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How Thick Should Brake Shoe LIning Be On A 3,500 lb Axle

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