ENGINE SYSTEMS
63
8) Crankshaft bearing (bush)
Inspection
(1) Check the bearing (bush) and replace if peeling,
melting, uneven wear, improper contact, or other
damage is notice.
(2) Measure the oil clearance of the bearing (bush) and
crankshaft journal using a cylinder gauge and
micrometer.
(3) If the oil clearance exceeds the service limit
according to the result of measurement, replace the
bearing (bush).
Clearance between crankshaft journal and bearing
(bush) (oil clearance) (mm)
Model
Standard
assembling value
Service limit
·
S773
0.039 – 0.106 More than 0.2
31 32
Model Bush size
Bush code
No.
Crankshaft journal outside
dia. Finishing dimension
(∅)
S753
·
S773
STD.
198517080 45.964 – 45.975
NOTE:
1. Measure the dimensions in the A and B directions
at the position 1 and 2 in the right figure avoiding
the oil hole of the bearing (bush) and calculate
difference from the maximum value of the
crankshaft journal (oil clearance).
2. When replacing the bush, push it up using a press
or the like. At this time, align the oil holes and
push it up until the bush end surface becomes
level with the outside machined surface of the
cylinder block (see the arrow mark in the right
figure).
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