5-14. GEAR COVER MAINTENANCE INSTRUCTIONS - Continued
Measure inside diameter of the camshaft bearing
bore with vernier caliper. Replace gear cover if
bore diameter exceeds 2.4405 in. (61.991 mm).
R E P A I R
Remove defective roll pins (15) by pulling out
with a plier or vice grip. Install replacement roll
pin, tapping gently with hammer.
Replace a worn sleeve bushing (16) as follows:
Using an arbor press and a 18 mm diameter
pressing rod with a 16 mm pilot, press the
sleeve bushing (16) through to the inside of
the gear cover (13).
Using the same pressing rod and arbor press
install replacement bushing (16) into gear
cover (13). Seat the bushing flush with the
outside surface of the gear cover.
I N S T A L L A T I O N
The installation process depends on the
components/parts that were removed from
the gear cover. The procedure below pro-
vides for complete installation to replace
the gear cover itself. Perform only those
If removed, install the primer assembly (Para. 5-
If removed, install the camshaft bearing and cam-
shaft assembly (Para. 5-15).
If removed, install the governor control lever and
shaft mechanism (Para. 5-16).
If removed, install the injector fuel pump (Para.
Turn the flywheel to bring the piston to top dead
center (TDC) by aligning the flywheel timing mark
with the mark stamped on the engine housing at
the 3 oclock position
Rotate the camshaft gear observing for the timing
mark to appear and align with mark in the open-
ing for the compression release on top of gear
Install new gasket (14) to the mounting face of
the gear cover (13).
Lubricate the camshaft gear and exposed shaft
tip with engine lubricating oil, and carefully install
the gear cover (13) onto the engine housing.
Care must be taken to ensure that the tip of the
camshaft engages bore of engine housing, while
engaging camshaft gear teeth with teeth of crank-
shaft gear without changing the alignment of tim-
If the position of the governor should pre-
vent seating of the camshaft gear to the
crankshaft gear, turn the flywheel until its
timing mark aligns with threaded hole, ap-
proximately 1 oclock on the engine hous-
ing. Turn the camshaft gear to offset the
timing mark exactly 3 teeth to the left of
the mark on edge of compression release
opening. Repeat step 8, maintaining this
alignment. Rotate flywheel to TDC and
check camshaft timing mark for alignment
with mark in the opening for the compres-
sion release on top of gear cover (13).
If after installation of the gear cover the tim-
ing mark of the flywheel is within ±0.0787
in. (±2 mm) of the mark on engine hous-
ing, the timing is correct.
After aligning roll pins (15) with respective bores
of the engine housing, gently tap around front
edge of the gear cover with plastic hammer to
seat gear cover (13) to the engine housing.
Secure gear cover with six capscrews (11
and 12), installing the three longer capscrews
into the top two and bottom left holes. Tighten
capscrews in a cross pattern, to 22 - 25 ft-lbs (29 -
34 Nm) with torque wrench fitted with 6 mm hex