Service manual

ENGINE INSPECTION
PUSH ROD
1. Visual Inspection. Check the push rod for damage on
both ends.
If it is severe, replace it.
2. Bend Inspection. Check the push rod for bend and, if
it exceeds the limit, replace it. Place the push rod on a flat
surface and measure the clearance between the center
of the
push rod and the flat surface. Replace the push rod
if the
wear limit is exceeded.
71 B171C Bend limit: 0.19 mm (0.0075 in)
. TESTING THE
PUSH ROD
TIMING GEAR COVER
PUSH RODS
1. Inspecting timing gear cover. Check the timing gear
cover and oil seal for any damage.
If necessary, replace the
cover or oil seal.
2. Oil seal replacement. To remove the oil seal, use the
oil seal puller and installer and pull out the oil seal.
To install,
apply the engine oil on the outer periphery of the oil seal,
then press in the oil seal with oil seal puller and installer.
OIL SEAL PULLER AND INSTALLER
',. ~ OIL SEAL
~ TIMING GEAR COVER
----IIV~--~--l~~III~I--
TIMING GEAR OIL SEAL
REPLACEMENT
Dll
OIL SEAL INSET
6.35·7.62 MM
(0.250 • 0.300 IN)
REAR OIL SEAL
1. Inspecting oil seal. Check the oil seal lip for wear or
other damage and,
if necessary, replace it.
2. Oil seal replacement. Upon inspection, finding the
existing seal worn or frayed,
pick the old seal halves out of
their grooves and thoroughly clean the half-housings.
a. With half-housing held in a soft-jawed vise and the
seal recess uppermost, settle one inch (25 mm)
of the
seal wick at each
end into the groove. Make certain
that each end
of the seal projects 0.25/0.51 mm
(0.010/0.020 in) beyond the joining faces of the
two-piece housing.
b. Press the remainder of the seal wick into the groove
starting from the
center and working outwards.
c. Using a suitable round bar, roll and press the seal into
place in
both half-housings.
REAR OIL SEAL
o
MAIN CAP BOLT
LOWER SEAL
HOUSING BOLT
SEAL HOUSING
CLAMP BOLT
3. To refit the assembly: Thoroughly clean the butt joint
between the half-housings.
a. Lightly coat the butt joint faces with a liquid gasket
compound similar
to Dow Corning Silastic 732 RTV
adhesive/sealant.
Lubricate the exposed diameter of the
wick seals with
graphite grease.
b. Oil the crankshaft at the oil return groove. Place the
half-housings in
position against the gasket and the
engine block
and locate all the bolts into the block and
bearing cap face finger tight only.
c. Tighten the clamping bolts to a temporary torque of
0.55 - 0.83 kg m (4 - 6 lb ft).
d. Tighten the bolts in the block and cap to a torque of
1.66 kgfm (121b ft).
e. Finally, tighten the clamping bolts to a torque of 1.66
kgf m (12 lb ft).
Engines & Generators
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