| |
TM 10-3930-638-24&P
3-5. ENGINE-MAINTENANCE (cont)
a. Engine Tune-up (cont).
(2) Valve Tappet Clearance Adjustment.
This task covers adjustment of tappet clearance for engine intake and exhaust valves.
INITIAL SETUP
TOOLS
EQUIPMENT CONDITION
Automotive Mechanic’s
Paragraph
Condition Description
Tool Kit
NSN 5180-00-754-0641
Vehicle parked on level surface, engine off,
Extension Wrench
FSCM 10988 P/N M20419
and parking brake applied.
2-53c
Left side panel removed.
MATERIALS/PARTS
2-53d
Top hood removed.
No. 30 engine oil
3-5a(1)
Engine positioned at TDC for No. 1
Rocker arm cover gasket
cylinder.
3-5i
Rocker arm cover removed.
STEP
LOCATION
ITEM
ACTION
REMARKS
TAPPET ADJUSTMENT — COLD SETTING
1
NOTE
The cold setting valve tappet clearance must be adjusted when-
ever arms or push rods have been removed. Do not attempt to
start engine until cold setting tappet clearance adjustment has
been performed.
a. Rocker arm adjusting
Adjust
Loosen adjusting screw until a 0.012 inch
screw for No. 1
feeler gage can be placed between rocker
cylinder intake valve
arm and valve stem as shown, then turn
adjusting screw clockwise until rocker
arm-to-valve stem clearance is 0.012 inch
3-29
|
