TM 9-6115-668-13
5.54 CHECKING AND ADJUSTING VALVES.
This task covers:
a. Removal
b. Adjustment
c. Installation
INITIAL SETUP
Tools
Equipment Conditions
General Mechanic's Tool Kit
Reference
(item 2, appendix B)
Generator Set 150kw shut
Engine Cranking Gear (PN 100300)
down.
Mandrel (PN 190200)
paragraph 2.5.2
WARNING
Disconnect the negative battery cable first and then the positive battery terminal
cables. Failure to observe this warning could result in severe personal injury or
death.
REMOVAL
1.
Remove eight screw caps (1. figure 5-56), eight packing preform (2), eight 0-ring t3), eight valve cover (4), and
eight gaskets (5).
NOTE
Engine must be cooled at least 3 hours.
ADJUSTMENT
1.
Turn engine using Engine Cranking Gear (PN 100300) or Mandrel (PN 190200) until valves of number one
cylinder overlap.
NOTE
Valve overlapping means Exhaust valve is about to close and the Intake valve is
about to open. Both pushrods are now non-rotatable.
2.
Check valve clearance for valves marked in black (fig 5-57), using a feeler gauge (2, fig 5-59). Gauge should just
slide into gap (3, fig 5-60) between rocker arm lug (4) and valve (5):
Intake valve (I) 0.2 mm
Exhaust valve (E) 0.3mm
3.
If gap is too small or too large. loosen locknut (1, fig 5-60) one or two turns and turn adjusting screw and turn
adjusting screw (2) with a screwdriver (1, fig 5-59); once locknut is tightened gauge should slip out with little
resistance.
4.
Turn crankshaft 360 degrees so that number seven cylinder is overlapped.
Change 2 5-239
