Adjustment -706881061

TM 5-4210-233-14&P-1

5-73. DECOMPRESSION RELEASE - Continued

Adjustment.

CAUTION

If the screw is tightened more than 1 turn, the exhaust valve

could hit the piston.

(1)

With the piston 10 to 450 past TDC on the power stroke, hold the arm in the decompression

position (tension against spring). Loosen the lock nut and turn the set screw so it just touches the

exhaust rocker arm. The release arm must be tight against the snap ring during adjustment. Then

turn the screw exactly one revolution clockwise. Original factory setting marked with white or

yellow paint.

(2)

Hold the set screw and lock it in position with the lock nut. Turn the nut hand tight plus 1/4 to 1/2

turn to lock the mechanism.

(3)

Release the mechanism to allow compression. Check the clearance between the screw and rocker

arm. Insert a feeler gauge between valve and rocker arm to take up valve clearance for this check.

If there is no clearance, back off the set screw until it just clears the rocker arm.

(4)

When reassembling the rocker cover, remove the solenoid, dip the plunger O-ring in oil and

reinstall when cover is on the engine. Align solenoid so terminal "SW" is above terminal "IGN".

d. Follow-on Maintenance.

(1)

Connect batteries (see para 4-114).

5-390