Dorman - First Stop Brake Master Cylinder P/N:M630623
Give your brake system a fresh start with the Dorman First Stop Brake Master Cylinder M2796. It is a new cast iron master cylinder that converts the force on the brake pedal into the hydraulic pressure that applies the brakes. It is listed for many models, among them the 1963-1966 Jeep DJ3, 1959-1966 Jeep CJ3 and 1959-1966 Jeep CJ5. See the Buyer's Guide tab for the full list.
Dorman precision-engineers this master cylinder to match the original unit's design, function and performance on the listed applications. It is built from new, high-quality materials for a safe, durable replacement.
Specifications: 1 in bore diameter; one outlet with a 1/2-20 rearward outlet size; reservoir included; sensor not included; mounting hardware not included. Country of origin: Taiwan.
Signs a master cylinder may need replacing include a soft or sinking brake pedal, brake fluid leaking at the cylinder, and a pedal that slowly drops under steady pressure. If a worn master cylinder is the cause, M2796 replaces it. Diagnose the brake system before replacing parts, and consult the vehicle service information for the correct fasteners and the bleeding procedure.
Interchange: 83-32003 · 100-2368 · M-83003 · 13-32796 · 10-57585 · 130.63003 · 355-42013
8332003 · 1002368 · M83003 · 1332796 · 1057585 · 13063003 · 35542013 · M900008 · 11053 · 3116920 · 3127138 · 3132994 · 642994 · 649294 · 805348 · 909583 · J812637 · J8126738 · MC250080 · 2622896 · 5461280 · MC2796 · F14055 · F2796 · MC14055
This part cross-references / interchanges with the following part numbers:
Is this the right 1959-1966 Jeep CJ5 master cylinder?
M2796 is listed for the 1959-1966 Jeep CJ5, the 1959-1966 Jeep CJ3 and the 1963-1966 Jeep DJ3. Check the Buyer's Guide tab to confirm your exact vehicle.
What does a brake master cylinder do?
It converts force from the brake pedal into hydraulic pressure and pushes brake fluid through the brake lines to apply the brakes.
What comes in the box?
The package contains the master cylinder with its reservoir. Mounting hardware and a sensor are not included.
What are the key specs of Dorman M2796?
It has a cast iron housing, a 1 in bore diameter and one outlet with a 1/2-20 rearward outlet size. All of its rubber components are made from EPDM compound to resist glycol-based brake fluid.
Do I need to bleed the brakes after installing it?
Yes. A master cylinder is typically bench-bled before installation, and the brake system is bled afterward. Follow the vehicle service procedure for your application.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.