Hydraulic Tappets

DISASSEMBLY

CAUTION: The plunger and tappet bodies are not interchangeable. The plunger and valve must always be fitted to the original body. It is advisable to work on one tappet at a time to avoid mixing of parts. Mixed parts are not compatible. Do not disassemble a tappet on a dirty work bench.

Hydraulic Roller Tappet Assembly:

1. Pry out plunger retainer spring clip.
2. Clean varnish deposits from inside of tappet body above plunger cap.
3. Invert tappet body and remove plunger cap, plunger, flat or ball check valve, check valve spring, check valve retainer and plunger spring. Check valve could be flat or ball.

CLEANING AND ASSEMBLY

1. Clean all tappet parts in a solvent that will remove all varnish and carbon.
2. Replace tappets that are unfit for further service with new assemblies.
3. If plunger shows signs of scoring or wear and valve is pitted, or if valve seat on end of plunger indicates any condition that would prevent valve from seating, install a new tappet assembly.
4. Assemble tappets.