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TM 9-2320-360-34-1
3-27. ENGINE TUNE-UP SERVICE/ADJUST/CALIBRATE
This task covers:
a. Exhaust Valve Clearance Adjustment
c. Fuel Injector Timing Adjustment
b. Engine Brake Retarder Adjustment
d. Follow-On Maintenance
INITIAL SETUP
Equipment Condition
Tools and Special Tools
Engine temperature 100F (38C) or less
Tool Kit, Genl Mech (Item 202, Appendix E)
Rocker covers removed (TM 9-2320-360-20)
Timing Gage, Injector (Item 194, Appendix E)
Wrench Set, Socket, 3/4 In. Drive (Item 231,
Appendix E)
Wrench, Torque, 0-300 Lb-In. (Item 235,
Appendix E)
NOTE
·
To reduce maintenance time, para
3-27a and 3-27b may be done for
each cylinder at the same time
without rotating engine.
·
Exhaust valve and brake retarder
adjustments for all cylinders can
be
completed
during
one
revolution of the crankshaft if
para
3-27a
and
3-27b
are
performed in cylinder sequence
shown.
a.
Exhaust Valve Clearance Adjustment
CAUTION
Do
not
turn
camshaft
pulley
counterclockwise. Failure to comply
may result in engine damage. If
pulley loosens during procedure, it
must be torqued.
NOTE
Exhaust valves are fully closed when
push rod sides of rocker arms are at
their
lowest
point
and
injector
follower is fully depressed.
(1)
Rotate crankshaft by turning camshaft
pulley (1) clockwise until exhaust valves
(2) are fully closed.
3-136 Change 1
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