Dorman - First Stop Drum Brake Wheel Cylinder Kit P/N:351683
Reseal a leaking rear drum brake wheel cylinder with the Dorman – First Stop Drum Brake Wheel Cylinder Repair Kit (MPN 3633). Its components are a direct replacement designed to match the original parts used to rebuild the wheel cylinder on the listed vintage Chevrolet and Pontiac applications, including the 1936 Chevrolet Standard, 1937-1938 Chevrolet Master, 1941-1942 Chevrolet Fleetline and 1946-1948 Pontiac Torpedo — see the Buyer's Guide tab for the full list.
A rear drum brake wheel cylinder uses hydraulic pressure to push the brake shoes outward against the drum. Over time its internal cups and dust boots wear and can let brake fluid seep past. If worn seals are the cause of the leak, this kit reconditions the existing cylinder rather than replacing the whole unit.
The listed applications use two per vehicle, so order two kits to service both rear wheel cylinders. Country of origin: China.
Interchange: K922719 · WK651760 · 5450429 · WK-9 · WK9 · F3633 · WK3633
Manufacturer part number 3633
This part cross-references / interchanges with the following part numbers:
What's included in this repair kit?
It includes the wheel cylinder cups (seals) and dust boots needed to reseal the cylinder bore. Wheel cylinder pistons, expander spring, bleeder screw, bleeder screw cap and mounting hardware are not included.
What vehicles does it fit?
It's designed for listed vintage Chevrolet and Pontiac models from 1936-1948, such as the Chevrolet Standard, Master and Fleetline and the Pontiac Torpedo. See the Buyer's Guide tab for the full application list.
What bore size does this kit fit?
It is sized for a 1.188 in wheel cylinder bore. Confirm your wheel cylinder's bore size before ordering.
How many kits do I need?
The listed applications use two per vehicle, one for each rear wheel cylinder, so order two kits to service both sides.
How do I know my wheel cylinder needs rebuilding?
Signs it may need service include brake fluid seeping past the cups or dust boots and a low or soft pedal. Diagnose the cause first, since leaks can have other sources.
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.