What kind of brakes do GMC master cylinders have?
The 34mm type master cylinders have the rear brakes attached to the rear reservoir. The difference is in the size of the fitting where the brake lines attach. You can either bend the brake lines to reverse where the front and rear lines attach, or use adapters on the brake line fittings.
What was the original GMC master cylinder number?
The cross reference is GM part number 14009146, or a 1979-1995 GMC/Chevy P30 or P3500 van with all wheel disc brakes. NOTE: The original master cylinder had the rear brake lines coming off the front reservoir.
What kind of master cylinder does a GMC motorhome use?
Here are the two most common choices: Both Manny’s brake kit and the TSM kit, which has the same size calipers, have been successfully used with the standard 1-1/4″ master cylinder such as the Wagner F79821, Raybestos MC39075, or ACDelco 18M92.
What kind of push rod does a GMC master cylinder use?
The push rod can easily be fabricated from steel rod stock. The end of the rod that goes into the brake booster sleeve is flat, with a slight chamfer of the edge so it’s not sharp. The side that fits against the master cylinder is rounded so that it seats properly into the conical depression on the back of the master cylinder piston.
Where are the brake calipers and rotors located?
The brake calipers and rotors should not be ignored when servicing the brake system. The calipers use hydraulic pressure from the brake fluid to squeeze the brake pads against the rotors. Rotors are installed on the wheel hub and rotate as the wheel spins while providing a contact surface for the brake pads.
Why is there no pedal on my new master cylinder?
No Pedal with New Master Cylinder Installation – Quick Fix or Check? A “no brake pedal” condition can be encountered after a new master cylinder is installed, leading the technician to believe that the master cylinder is defective.
When do you need to replace a brake caliper?
Replacing a caliper if it is leaking brake fluid or if the piston seizes is important to continue braking safely, and these failures should be addressed as soon as a problem is detected. Brake fluid transfers the hydraulic pressure from the brake master cylinder to the brake calipers and wheel cylinders.
What causes brake drag when replacing master cylinder?
This situation is usually remedied by replacing the master cylinder. We see a lot of brake drag problems caused by a master cylinder that is too full of fluid. If the system is overfull, there may not be enough room in the reservoirs for the fluid to return.