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REMOVAL (cont) - TM-55-4920-426-13-P0306
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TM-55-4920-426-13-P Gasoline Engine Driven Hydraulic Systems Test Stand Type Type D5-D P/N 79009-100 NSN
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VALVES AND SPRINGS REPLACE
TM 55-4920-426-13&P
4-23
VALVES AND SPRINGS INSPECT
4-23
This task covers:
Inspection
INITIAL SETUP
Personnel Required
Tools
63B Wheel Vehicle Mechanic
INSPECTION
a.
Inspect for burned or pitted
valves, pitted valve seat, worn
valve guide.
b.
Check all components for
foreign deposit buildup.
END OF TASK
4-24
VALVES AND SPRINGS REPAIR
4-24
This task covers:
Replacement and Cleaning (See INITIAL SETUP, Para. 4-23).
(Grinding and Seating)
REPAIR
a.
Grind the valve face at 45 to the vertical center line of valve stem.
b.
Grind the valve seat insert at 45.
c.
Lap valve and insert using lapping compound. Lap the valves by rotating them back and forth with a
reciprocating advance valve tool. After valves are lapped, wash the valve and seat thoroughly with
cleaning solvent.
END OF TASK
4-25

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