5_108.bk Page 167 Thursday, October 4, 2001 11:45 AM
REPAIR INSTRUCTIONS Valve Seat Insert Removal Refer to Figure 219. Valve seat extractor kit PT6391 and collet PT6390-4 are used to remove inlet and exhaust seat inserts.
Collet PT6390-4 is not included in basic kit PT6391. 219
Figure 219 — Valve Seat Extractor Kit PT6391 1. Grinding Wheels 2. T-Handle and Shaft Assembly 3. Collet 4. Allen Wrench 5. Lifting Bridge
6. Grinder Base 7. Grinder 8. Wrenches 9. Dressing Stone
Refer to Figure 220. 1. Using depth measurement tool (1), measure distance from cylinder head surface (2) to point on insert where groove will be ground.
This point should be approximately 0.060 inch (1.524 mm) below any angular face on valve seat insert.
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