140
10
10
GEAR REDUCTION
Disassemble Gear Reduction
1. Note orientation of gear reduction
assembly on engine. Place an oil
collection pan beneath the assembly.
2. Remove oil vent plug (C, Figure 17) and
set aside.
3. Loosen four cap screws (D) that secure
the gear case cover assembly. Pull cover
(A) away from gear case (B) and allow oil
to drain into pan.
4. After gear case is drained, remove screws
and cover.
Figure 17
5. Remove drive shaft assembly (A, Figure
18) from gear case (B).
6. Bend down two screw locks (C), if
equipped. Remove four cap screws. Slide
gear case off engine.
Figure 18
Inspect Gear Reduction Parts
1. Inspect seals for cracks, tears, or
hardening. Replace seals if necessary.
2. Inspect crankshaft pinion gear and drive
shaft gear for worn, cracked, or chipped
teeth. Replace if damaged or worn.
3. Inspect gear case and cover for cracks,
damaged mounting, or damaged gasket
surfaces. Replace if damaged.
Assemble Gear Reduction
1. If replacing seals, install with sealing lip
(A, Figure 19) toward engine side of gear
case (B) or cover (C) until seal is flush
with gear case or cover.
Figure 19
NOTE: The gear reduction assembly must be
installed in the same orientation as noted prior to
removal.
1. Insert two long screws and screw locks
(A, Figure 20), if equipped, with tabs
against the ribs of gear case.
2. Install new gasket, if used, on outside of
gear case.
3. Slide gear case over crankshaft and
against crankcase cover.
4. Hand tighten two long screws inside gear
case.
5. Install and hand tighten two short screws
with lock washers to the outside of gear
case (B).
6. Torque the four screws to values listed in
Section 12 - Engine Specifications.
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