TM 5-3810-300-24&P-3
1.7.3 CAMSHAFT AND BALANCE SHAFT GEARS
6. Start the nuts on their respective shafts by hand.
Tighten the nuts after the shafts have been installed
in the cylinder block.
7. Install the camshaft and balance shaft in the engine
as outlined in Section 1.7.
8. With the shafts and front balance weights in-stalled,
wedge a clean cloth between the cam-shaft and
balance shaft gears, and tighten the gear retaining
nuts to 300-325.1lb-ft torque.
9. Secure the nuts with the retainers, retainer bolts and
lock washers.
10. Check the backlash between the mating gears. The
backlash should be within .003"-.010".
Fig. 2 - Removing Gear (Camshaft or Balance Shaft)
with Tool J 1902-01
washers between the end bearings and thrust shoulders
of the shafts, and between the end bearings and the
gears.
NOTE: Be sure the steel faces of the thrust
washers are next to the bearings.
3. Install the Woodruff keys for the gears in both shafts.
4. Note that the teeth on one gear form a right-hand
helix and on the other a left-hand helix. When
viewing the engine from the flywheel end, the gear
with the right-hand helical teeth is located on the left-
side and the gear with the left-hand helical teeth is
located on the right-side of the engine. With this in
mind, rest the non-gear end of camshaft on a wood
block and start gear onto the other end of shaft by
hand so the keyway aligns with the key and with the
Fig. 3 - Replacing Gear (Camshaft Shown) with Tool J 1903
flat finished face of the gear away from the bearing.
5. Use gear installer, J 1903, as shown in Fig. 3, to
drive the gears on the camshaft and balance shaft
tight against the shoulders on the shafts.
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