Kubota M6800S Workshop Manual page 131

M6800 · M6800S · M8200 · M9000, 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.
Calculate the oil clearance.
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-S46
ENGINE
0.01 mm
0.00039 in.
W1064422
Intake 37.63 mm
valve 1.4815 in.
Exhaust 38.96 mm
valve 1.5338 in.
Intake 37.13 mm
valve 1.4618 in.
Exhaust 38.46 mm
valve 1.5141 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
1.8084 to 1.8091 in.
46.000 to 46.025 mm
1.8110 to 1.8120 in.
W1064798
KiSC issued 03, 2008 A