REPAIR INSTRUCTIONS, PART 1
Page 221
Timing Gear Train Installation
Apply a light coat of clean engine oil to all parts
before assembly.
Do NOT overtighten the mounting flange
fasteners when installing any of the gears in the
timing gear train. Overtightening the fasteners
can cause stripped threads in the cylinder block.
1. Assemble a new O-ring on the crankshaft
rear hub.
2. Apply a film of engine oil to the O-ring and
assemble the crankshaft gear on the
crankshaft hub. Install two Allen-head bolts
through the crankshaft gear and tighten to
specification.
Leave two fasteners loose enough to aid in
turning the crankshaft with a lever for gear
alignment purposes.
297
Figure 297 — Crankshaft Gear-to-Hub Assembly
3. Assemble the adjustable idler gear (item 3 in
Figure 298), hub, bushing, thrust washer
and fasteners on the timing gear plate. Hand
tighten the fasteners.
298
Figure 298 — Adjustable Idler Gear
4. Check that the camshaft is positioned at
TDC by having the TDC marking on the
camshaft aligned with the markings on the
No. 7 camshaft bearing cap.
299
Figure 299 — Camshaft Positioning
1. Crankshaft Rear Hub
2. O-Ring
3. Crankshaft Gear
1. Crankshaft Gear
2. Intermediate Idler
Gearset
3. Adjustable Idler Gear
4. Camshaft Gear
5. Lower Idler Gear
6. Tandem Pump Drive
Gear
7. Air Compressor Drive
Gear
8. PTO Drive Gear
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