Section 03-01D: Engine, Diesel, 7.3L | 1996 F-Series Workshop Manual |
Valve tappets (6500) should be kept in proper sequence to permit installation into original position. Inspect and test each valve tappet separately to prevent intermixture of internal parts. If any part of valve tappet needs replacing, replace the entire valve tappet.
| Item | Part Number | Description |
|---|---|---|
| 1 | — | Plunger (Part of 6500) |
| 2 | — | Plunger Body (Part of 6500) |
| 3 | — | Push Rod Seat (Part of 6500) |
| 4 | — | Retainer (Part of 6500) |
| 5 | — | Metering Valve (Part of 6500) |
| 6 | — | Plunger Spring (Part of 6500) |
| 7 | — | Tappet Body (Part of 6500) |
Disassembly
Remove retainer with small screwdriver.
Remove push rod seat and metering valve.
Remove plunger and plunger spring.
Cleaning
Thoroughly clean all parts in clean solvent and wipe with a clean, lint-free cloth.
Inspection
Inspect parts and discard the entire valve tappet if any part shows excessive wear or damaged roller is evident. Replace entire assembly if the plunger is not free in plunger body. Plunger should drop to bottom of plunger body by its own weight when assembled dry.
Roller should rotate freely, without excessive play. Check for missing or broken needle bearings. Roller should be free of pits or roughness. If present, inspect camshaft lobes for similar condition. If pits or roughness are evident, replace valve tappet.
Assembly
Coat all parts with clean engine oil.
Install plunger spring and plunger into tappet body.
Install metering valve and push rod seat into tappet body and install retainer.
Check for free operation by pressing down on the push rod seat. Valve tappets can also be checked with a hydraulic tester to test leak-down rate. Follow instructions provided with test unit.