Shibaura N843, Руководство по ремонту

Страница: 28 / 75

3-10 109823 2/09
Inspection
1. Check the bearing and replace if peeling, melting,
uneven wear, improper contact, or other damage is
noticed.
2. Measure the oil clearance of the bearing and
crankshaft journal using a cylinder gauge and
micrometer.
3. If out of specification, replace the bearing and/or
crankshaft.
NOTE:
1. Measure the dimensions in the A and B
directions at positions 1 and 2 in
Fig. 3-27 avoiding the oil hole in the
bearing. Calculate the difference
between that measurement and the
maximum diameter of the crankshaft
journal (oil clearance).
2. When replacing the bushing, push it up
using a press or similar method. At this
time, align the oil holes and push it up
until the bushing end surface becomes
flush with the outside machined surface
of the cylinder block (see the arrow
mark in the figure at right).
3. If the crankshaft journal has been
ground, check the oil clearance before
reinstalling it.
Crankshaft
Clearance between crankshaft journal and bearing
(Oil clearance) in(mm)
Standard assembling value Service limit
0.0015-0.0042
(0.039-0.106)
More than
0.008(0.2)
Bearing
size
Bearing part
No.
Crankshaft journal
outside dia. Finish-
ing dimension ø
in(mm)
STD. 198517592 1.8883-1.8888
(47.964-47.975)
Fig. 3-26
Fig. 3-27
1 2
A
B