Underdrive Brake

Disassembly Procedure





1. Remove and discard the snap ring from the underdrive brake piston assembly. Separate the spring, washer and piston rod.





2. Remove and discard the underdrive brake piston O-ring.





3. Inspect the underdrive brake spring.
- Using vernier calipers, measure the free length and outer diameter of the spring. If it does not meet specifications, replace it.





Spring Table

Assembly Procedure
1. Clean the components using a clean, high-quality parts cleaning solvent and use compressed air to dry all parts. Inspect all parts for damage or wear.





2. Assemble the piston rod, washer and compression spring to the piston.





3. Install a new snap ring.