Service Manual

Crankshaft Inspection
1. Inspect crankshaft journal and pin areas for streaking
or
seizure. Measure outside diameter of journal and in-
side diameter of main bearing. If clearance exceeds the
limit replace main bearing. If installing new bearing does
not reduce clearance to within service limit, crankshaft
must be reground and undersize bearings installed.
Standard value 0.021 – 0.045 mm (.0008 – .0018 in.)
Limit 0.1 mm (.004 in.)
Figure 227
Figure 228
When grinding crankshaft to undersize, note ”
R” dimen-
sions of fillets on journal and pin areas.
1.5 mm (.059 in.) R
1.5 mm (.059 in.) R
1.5 mm (.059 in.) R
Figure 229
Liquid Cooled
Gas Engine
Workman 3000/4000 Series
Page 3 – 105
Liquid Cooled Gas Engine