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TM 10-4320-343-14
4.10.23 Valve Clearance Adjustment.
This task covers: Valve Clearance Adjustment
INITIAL SETUP
Tools
Equipment Conditions
General Mechanic's Tool Kit (appendix B,
Equipment shut down, refer to
Section III, Item 1)
paragraph 2.5.1.2 or 2.5.2.2.
V-belt guard removed,
Material/Parts
paragraph 4.10.6.
Washers (TM 10-4320-343-24P)
General Safety Instructions
Gaskets (TM 10-4320-343-24P)
Sealant Adhesive (appendix E, Section II,
To prevent rolling or sliding, do not
Item 2)
work on equipment that is not
securely stabilized.
Do not work on equipment without
following standard shop safety
precautions.
WARNING
To prevent rolling or sliding, do not work on equipment that is not securely
stabilized. Ensure both wheels are secure. Failure to obey this warning may result
in serious personal injury.
a.
Remove bolts (figure 4-33, 1), washers (2), covers (3), and gaskets (4).
b.
Turn crankshaft (5) in direction of rotation until valves of number 1 cylinder (6) overlap (pushrods move freely).
c.
Adjust cylinder number 2 intake valve (7) and cylinder number 3 exhaust valve (8) as follows:
(1)
Loosen slotted adjusting screw locknut (9).
(2)
Adjust rocker arm/valve stem clearance to 0.006 in (015mm) by turning slotted adjusting screw.
(3)
While holding slotted adjusting screw, tighten locknut (9).
(4)
Recheck clearance and readjust if necessary.
d.
Rotate crankshaft one complete revolution (3600).
e.
Adjust remaining valves as in step c.
f.
Apply adhesive sealant to new gaskets (4) and place into position on cover (3).
g.
Install covers (3), washers (2), and bolts (1).
4-62
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