TM 10-4320-309-14
TM 4320-14/1
3-22. REPLACE/INSPECT/ADJUST VALVE ROCKER ARM ASSEMBLY
This task covers:
a) Removal
c) Adjust
b) Inspection
d) Installation
INITIAL SETUP
Tools
Equipment
Tool Kit, General Mechanics (Item 2,
Condition
Appendix B, Section III)
Para
Socket Set, 8 to 19 mm (Item 6,
3-16
Inlet sound enclosure assembly
Appendix B, Section III)
removed.
Wrench, 10 mm (Item 15,
3-16
Outlet sound enclosure assembly
Appendix B, Section III)
removed.
4-20
Cooling case cover removed.
Materials/Parts
Fuel, Diesel (item 4,
Appendix E, Section II)
Cloth, tint-free (item 11,
Appendix E, Section II)
REMOVAL:
a.
Remove two bolts (1) holding rocker arm cover (2) to cylinder head.
b. Remove rocker arm cover(2).
INSPECTION:
a.
Check for loose carbon, oil deposits, or caked dirt. Use clean, lint-free cloth dipped in diesel fuel to
dean area of rocker arm assembly. Wipe dry when thoroughly dean.
ADJUST:
NOTE
• Valve clearance should be adjusted when engine is mid.
• Conduit Table 3-5 for proper valve clearance.
a.
Turn flywheel so "T" mark on flywheel aligns with alignment mark on cylinder block.
b.
Slightly rotate flywheel (approximately 20 degrees in both directions). If valves move up and down, this
is the exhaust top dead center. Do not adjust the valve clearance with the flywheel in this position.
c.
Give flywheel another turn until ‘T’ mark on flywheel aligns with alignment mark on cylinder block.
Slightly rotate flywheel (approximately 20 degrees in both directions). If valves do not move up and
down, the flywheel is in correct position to check valve clearance.
3-33
