VALVES AND SPRINGS INSPECT

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

Inspect for burned or pitted

valves, pitted valve seat, worn

valve guide.

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

Grind the valve face at 45 to the vertical center line of valve stem.

Grind the valve seat insert at 45.

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