CHAPTER FIVE
ENGINE LOWER END
This chapter describes the service procedures for
the following lower end components:
1. Crankcase assembly.
2. Crankshaft.
3. Connecting rods.
4. Flywheel and starter clutch.
5. Oil pump.
6. Transmission shaft assemblies (removal and in-
stallation only).
When inspecting lower end components, com-
pare measurements to the specification in
Table 1
at
the end of this chapter. Replace any part that is
worn, damaged or out of specification. During as-
sembly, torque fasteners to the given specification.
The text makes frequent references to the left and
right side of the engine. This refers to the engine as
it sits in the frame not how it may sit on the work-
bench.
Refer to
Basic Service Methods
in Chapter One.
SERVICING THE ENGINE
IN THE FRAME
The following components can be serviced while
the engine is in the frame:
1. External gearshift mechanism.
2. Clutch.
3. Carburetors.
4. Starter.
5. Alternator and starter clutch.
6. Oil pump.
ENGINE
CAUTION
Examine the position of the cam tim
ing marks for each cylinder before re
moving the engine. When a cylinder is
set to TDC on the compression stroke,
the timing mark on the cam sprocket
(rear cylinder) or cam sprocket plate
(front cylinder) may not precisely
align with the pointer on the cylinder
head. Make a drawing of each cam
sprocket (or cam sprocket plate) and
cylinder head pointer so the cam
shafts can be correctly timed during
assembly. Refer to
Cylinder Head Re-
moval
in Chapter Four for checking
the cam timing.
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