FRONT
CASE
I
COUNTERBALANCE
SHAFT
AND
OIL
PUMP
4. Using a special tool drive the counterbalance shaft front
bearing from the cylinder block.
EARING
REMOVER
TOOL
5. Use the same tool and drive the counterbalance shaft rear
bearing from the cylinder block.
OIL
PUMP
ASSEMBLY·
INSPECTION
Fit the oil pump gear into the cylinder block, then, using a
feeler gauge, check the clearance with the body at the points
indicated in the diagram below.
DRIVEN
GEAR
BODY
CLEARANCE
STANDARD
A.
0.0161
-
0.0266in
(0.410
-
0.675mm)
B.
0.0051
-
0.0069in
(0.130
-
0.175mm)
DRIVE
GEAR
BODY
CLEARANCE
STANDARD
C.
0.0173
-
0.0276in
(0.44
-
0.70mm)
D.
0.0059
-
O.077in
(0.150
-
0.195mm)
DRIVEN
GEAR
SIDE
CLEARANCE
.0024
-
0.0047in
(0.06
-
0.12mm)
DRIVE
GEAR
SIDE
CLEARANCE
0.0027
-
0.0051
in
(0.07
-
0.13mm)
Using a straight edge, check the side clearance at the point
indicated in the illustration with a feeler gauge.
There should be no uneven wear on the contact surfaces
of
the cylinder block
or
on the pump gear side
of
the pump
DRIVEN
~~~ANCE.~.Ar
GEAR
ot1---DRIVE
GEAR
FRONT
CASE·
INSPECTION
Check
the front case for cracks
or
other damage also inspect
the oil holes.
If
the oil holes are clogged, use compressed air
or
solvent to clean them out.
CRANKSHAFT
FRONT
OIL
SEAL
CRANKSHAFT
FRONT
OIL
SEAL·
INSPECTION
Check
the oil seal for wear and damage. Inspect the oil seal
lip for hardening.
If
there any signs
of
wear, replace the seal.
COUNTERBALANCE
SHAFT
COUNTERBALANCE
SHAFT·
INSPECTION
Inspect the oil holes for clogging and clean
if
necessary.
Inspect the shaft journal for seizure, damage and its contact
with the bearing. Check the counterbalance shaft oil
clearance. Replace the counterbalance shaft
if
it fails to meet
the standards.
COUNTERBALANCE
SHAFT
STANDARDS
Front
Journal
Diameter
Rear
Journal
Diameter
Front
Journal
Oil
Clearance
Rear
Journal
Oil
Clearance
0.7869
-
0.7B74in
(19.987
-
20.000mm)
1.7317
-1.7322in
(43.984
-
44.000mm)
0.0014
-
0.0027in
(0.035
-
0.068mm)
0.0014
-
0.0028in
(0.035
-
0.071mm)
Engines & Generators
27
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