Shibaura ST330, Workshop Manual

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7) Disassembly, inspection and reassembly of bearing holder
Disassembly and inspection
Center bearing
(1) Remove the bearing holder, and replace the metal if
peeling, melting, uneven wear, or improper contact is
noticed.
(2) Measure the oil clearance of the crankshaft center journal
and metal using a plasti-gauge.
(3) If the oil clearance exceeds the service limit according to
the result of the measurement, replace the metal and/or
clank shaft.
Clearance between crankshaft center journal and metal
(oil clearance) (mm)
Model
Standard
assembling value
Service limit
N843 0.044 － 0.102 0.2
Thrust washer
Check the thrust washer and replace if wear, improper contact,
seizure, or other damage is noticed, or thickness exceeds the
service limit.
Rear bearing holder thickness (mm)
Model
Standard
assembling value
Service limit
N843 2.95 － 3.00 2.8
Model N843
Metal size Metal code No.
Crankshaft center
journal finishing
dimension (ø)
STD.
198517232 (upper)
198517242 (lower)
67.957 – 67.970
129Y