TM 5-4310-393-14
c.
Check clearance between rocker and valve stem with a feeler gauge. Tappet clearance cold should
be 0.004 inch (0.10mm). To correct clearance, loosen nut (Item 2, figure 4-2).
d.
Adjust screw (Figure 4-2, Item 3) with a screwdriver until feeler gauge can be pulled between rocker
and valve stem with very slight resistance after nut (2) has been tightened.
C.
Check
1.
Checking the Decompression Mechanism Setting
a.
Rotate the decompression lever (Figure 4-2, Item 1) clockwise to START position (see Figure 4-3).
b.
Verify that the engine is decompressed by turning engine clockwise with the crank handle.
c.
If adjustment of decompression mechanism is indicated, refer to Direct Support Maintenance.
D.
Install.
1.
Reinstalling the Valve Cover.
a.
Position a new gasket (Item 7, figure 4-1) on the mating surface of the cylinder head.
b.
Position the valve cover (6) on the cylinder head and secure with washers (5) hex nuts (4) Torque to
35 Nm (25 Ib.-ft) then additional 1/8 turn with T-handle & socket.
c.
With screw (1) and washers (2) reinstall the vent line clamp (3) and tighten with an open-end wrench
Figure 4-3. Decompression Lever Positions
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