Maintenance
2751−3/A1
Winterthur Gas & Diesel Ltd.
1/ 5
Valve Seat − Replace / Grind
Tools:
1 Feeler gauge 94122
1 Valve seat dismantling device 94261
1 Template 94279
1 Tool, grinding 94291
1. General 1..........................................................
2. Preparation 1.......................................................
3. Valve Seat − Removal 1.............................................
3.1 Recommended Procedure 2...................................
3.2 Alternative Procedure 2.......................................
4. Valve Seat − Grind 3................................................
5. Valve Seat − Check 4................................................
6. Valve Seat − Installation 5...........................................
1. General
You must replace the valve seat when:
D The seating surface has too much damage, or
D Frequent grinding has worn the valve seat to more than the specified limit.
2. Preparation
1) Disassemble the valve and remove the valve spindle, refer to 2751−2.
3. Valve Seat − Removal
If a valve seat is removed e.g. to replace an unserviceable O-ring, you must:
D Grind the valve seat before installation (paragraph 4), or
D Mark the position of the valve seat in the valve cage before you start the removal
procedure.
2016
5
Exhaust Valve
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