Side Clearance Of Crankshaft; Crankshaft Alignment - Kubota D1503-M Workshop Manual

03-M-E3B, 03-M-DI-E3B, 03-M-E3BG WSM
(4) Crankshaft

Side Clearance of Crankshaft

1. Set a dial indicator with its tip on the end of the crankshaft.
2. Measure the side clearance by moving the crankshaft to the front
and rear.
3. If the measurement exceeds the allowable limit, replace the
thrust bearings.
4. If the same size bearing is useless because of the crankshaft
journal wear, replace it with an oversize one referring to the table
and figure.
Factory spec.
Crankshaft side
clearance
Allowable limit
(Reference)
• Oversize dimensions of crankshaft journal
Oversize
0.008 in.
54.50 to 54.70 mm
Dimension A
2.146 to 2.153 in.
26.20 to 26.25 mm
Dimension B
1.032 to 1.033 in.
2.8 to 3.2 mm radius
Dimension C
0.11 to 0.12 in. radius
The crankshaft journal must be fine-finished to higher than ∇∇∇∇

Crankshaft Alignment

1. Support the crankshaft with V blocks on the surface plate at both
end journals.
2. Set a dial indicator with its tip on the intermediate journal.
3. Measure the crankshaft alignment.
4. If the measurement exceeds the allowable limit, replace the
crankshaft.
Crankshaft alignment Allowable limit
S-90
DIESEL ENGINE
0.15 to 0.31 mm
0.0059 to 0.012 in.
0.5 mm
0.02 in.
0.2 mm
54.60 to 54.80 mm
2.150 to 2.157 in.
26.40 to 26.45 mm
1.040 to 1.041 in.
2.8 to 3.2 mm radius
0.11 to 0.12 in. radius
(0.4S)
0.02 mm
0.0008 in.
0.4 mm
0.02 in.
W1032880
W1033001
KiSC issued 07, 2008 A