Kubota M108S Workshop Manual page 180

M108S, WSM
Camshaft Alignment
1. Support the camshaft with V block on the surface plate and set a
dial indicator with its tip on the intermediate journal at right angle.
2. Rotate the camshaft on the V blocks and get the misalignment
(half of the measurement).
3. If the misalignment exceeds the allowable limit, replace the
camshaft.
Camshaft alignment Allowable limit
Cam Height
1. Measure the height of the cam at its highest point with an outside
micrometer.
2. If the measurement is less than the allowable limit, replace the
camshaft.
Factory
spec.
Intake and exhaust cam
height
Allowable
limit
Oil Clearance of Camshaft Journal
1. Measure the camshaft journal O.D. with an outside micrometer.
2. Measure the cylinder block bore I.D. for camshaft with an inside
micrometer.
3. If the clearance exceeds the allowable limit, replace the
camshaft.
Factory spec.
Oil clearance of
camshaft journal
Allowable limit
Camshaft journal O.D. Factory spec.
Camshaft bearing I.D. Factory spec.
1-S57
ENGINE
0.01 mm
0.0004 in.
W1064422
Intake 37.63 mm
valve 1.481 in.
Exhaust 38.96 mm
valve 1.534 in.
Intake 37.13 mm
valve 1.462 in.
Exhaust 38.46 mm
valve 1.514 in.
W1064551
0.050 to 0.091 mm
0.0020 to 0.0035 in.
0.15 mm
0.0059 in.
45.934 to 45.950 mm
1.8085 to 1.8090 in.
46.000 to 46.025 mm
1.8111 to 1.8120 in.
W1064798
KiSC issued 06, 2007 A