Tips For Removing Stuck Master Cylinder Cap On A Dexter T4750820 Actuator

Published 11/02/2023

Products Featured in This Question

Dexter Zinc-Plated Brake Actuator w/ Electric Lockout - Disc - 2-5/16" Ball - 12,500 lbs

(55)

$676.75

Replacement Master Cylinder Cap with Diaphragm for Dexter Model 10 and 20 Brake Actuators

(49)

$21.55

Question:

What’s the trick to getting the master cylinder cap off? I have this coupler on my trailer and the plastic hex just flexes when trying to unscrew counterclockwise using a tight fitting 1-1/16” wrench. Any additional force and the plastic cap will certainly break. Thanks

asked by: RG

Expert Reply:

Sometimes dust and dirt can get down in the threads of the master cylinder cap and they can get stuck on there real good. Unfortunately there is not really a trick to getting it off, other than using force. A little WD40 may help but I would use that as sparingly as possible. If you have no choice but to break the cap, it can be replaced with part # T4830601.

expert reply by: Jesse M