Shibaura N843, Руководство по ремонту

Страница: 29 / 75

109823 2/09 3-11
Inspection
1. To measure run-out of the crankshaft, support the
crankshaft using a V block as shown inFig. 3-28.
Using a dial indicator as shown, measure the run-out
of the center to the crankshaft center journal, by
slowly rotating the shaft through one revolution. If
the service limit is exceeded, correct or replace.
2. Check the crankshaft oil seal for damage or wear on
the contact surface and oil hole for clogging.
3. Check the crankshaft journal and pin for damage,
irregular wear (ellipticity, conicalness), and shaft
diameter. If service limit is exceeded replace the
bearing (bushing) and/or crankshaft. Measure the
dimensions of the journal and pin in the AA and BB
directions at positions 1 and 2 (Fig. 3-29) avoiding
the oil holes.
Flywheel and ring gear
Irregular wear limit of crankshaft journal and
pin ø in(mm)
More than 0.0020(0.05)
Shaft dia. At crankshaft journal ø in(mm)
Size Outside dia. Fin-
ished dimension
Repair value
STD. 1.8883-1.8888
(47.964-47.975)
Less than
1.886(47.9)
Shaft dia. At crankshaft pin ø in(mm)
Size Outside dia. Fin-
ished dimension
Repair value
STD. 1.6128-1.6132
(40.964-40.975)
Less than
1.6102(40.90)
Crankshaft run-out in(mm)
Standard assembling
value
Service limit
Less than 0.0012(0.03) More than 0.0024(0.06)
Fig. 3-28
Fig. 3-29
A
B
A
B
2 1
2 1
Pin
Journal