TM 9-4940-421-14
(4) Examine the camshaft thrust-plunger spring
(2) lnstall the thrust-plunger spring (6) and the
for pits or breaks. Replace a defective spring.
thrust-plunger (7) in the hollow end of the camshaft.
(5) Check the hardware for rust or bad threads.
(3) Slide the idler gear over the idler gear stud
Replace any defective hardware.
with the timing marks toward the shoulder of the idler
d. Installation.
gear shaft. Using a suitable fiber hammer, carefully
(1) Position the camshaft gear (3, fig 6-13) on the
drive the idler gear shaft into the case. Be sure that the
end of the camshaft. The three holes in the camshaft
oil groove is facing upward. Take care to allow 0.003 to
and the gear are staggered in such a manner that they
are lined up in only one position, which will automat-
0.004 inch clearance between the idler gear and stud
ically time the gear to the shaft. Secure the camshaft
collar. Install the setscrew in the crankcase to secure
gear in place with three lockwashers (2) and three
the idler gear shaft.
capscrews (1). Tighten to 14-18 lbs. ft.
(4) Check the position of all the gears and install
NOTE
the gear cover (para 6- 15c.(A)).
Be sure the timing marks on the camshaft gear and
crankshaft gear are lined up.
