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DISASSEMBLY, REASSEMBLY, INSPECTION, AND MAINTENANCE 3-45
Cylinder Block and Crankcase Cover
Replace a ball bearing in the following manner:
•
Remove the oil seal. Do not reuse an oil seal once it has been
removed.
•
Using a bearing puller as shown in the diagram on the right, remove
the bearing.
•
Clean the bearing housing and allow it to dry.
•
Apply oil to a new bearing.
•
Using a bearing driver, drive the bearing in until it is flush with the
end face of the housing.
Oil Seal
•
Once an oil seal is removed, replace it with a new one.
•
To install an oil seal, use a press or a seal driver.
•
Only on the PTO side of the type D engine, the oil seal must be
driven in 4 mm lower than the crankcase cover surface as shown in
the diagram. Other oil seals must be installed flush with the case
surface.
1. Oil Seal
2. Crankcase Cover
•
Fill the area between oil seal lips [A] and [B] with high-temperature
grease before installing the oil seal.
NOTE
Use a guide jig to install the oil seal without damaging its lip.
A: Lip A
B: Lip B
C: Crankcase or Crankcase Cover
Plain Bearing Area Inspection
•
Using a cylinder gauge, measure the bore of the plain bearing areas
of the cylinder block and the crankcase cover.
Plain Bearing Area Bore Service Limit (maximum) (Unit: mm)
FE120 FE170 FE250 FE290 FE350, 400
Type D Type G Type D Type G Type D Type G Type D Type G Type D Type G
30.075 30.075 35.075 35.075
Crankshaft
(1.184 in) (1.184 in) (1.381 in) (1.381 in)
15.063 15.063 16.063 16.063 20.063 20.063 23.063 23.063 23.063 23.063
Camshaft
(0.593 in) (0.593 in) (0.632 in) (0.632 in) (0.790 in) (0.790 in) (0.908 in) (0.908 in) (0.908 in) (0.908 in)
Flywheel Side
(cylinder block)
15.063 15.063
Balancer Shaft –
(0.593 in) (0.593 in)
– – – – – –
Crankshaft
15.063 16.063 20.063 23.063 23.063
Camshaft
(0.593 in) (0.632 in) (0.790 in) (0.908 in) (0.908 in)
PTO Side
(crankcase
cover)
Balancer Shaft – – – – – – – –
Note: An empty area signifies that a ball bearing is used.
If the measured value is greater than the service limit, replace the part with a new one.