Kubota M105S, Workshop Manual

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1-S59
M105S, WSM ENGINE
Valve Spring Setting Load
1. Place the valve spring on a tester and compress it to the same
length it is actually compressed in the engine.
2. Read the compression load on the gauge.
3. If the measurement is less than the allowable limit, replace it.
W1062321
Oil Clearance between Rocker Arm Shaft and Bearing
1. Measure the rocker arm bearing I.D. with an inside micrometer.
2. Measure the rocker arm shaft O.D. with an outside micrometer,
and then calculate the oil clearance.
3. If the clearance exceeds the allowable limit, replace the rocker
arm and measure the oil clearance again. If it still exceeds the
allowable limit, replace also the rocker arm shaft.
W1062503
Push Rod Alignment
1. Place the push rod on V blocks.
2. Measure the push rod alignment.
3. If the measurement exceeds the allowable limit, replace the push
rod.
W1062712
Setting load / Setting
length
Factory
spec.
Intake
valve
63.547 N / 31.5 mm
6.48 kgf / 31.5 mm
14.256 lbs. / 1.2401 in.
Exhaust
valve
63.547 N / 31.5 mm
6.48 kgf / 31.5 mm
14.256 lbs. / 1.2401 in.
Allowable
limit
Intake
valve
45.864 N / 31.5 mm
4.68 kgf / 31.5 mm
10.296 lbs. / 1.2401 in.
Exhaust
valve
45.864 N / 31.5 mm
4.68 kgf / 31.5 mm
10.296 lbs. / 1.2401 in.
Oil clearance of rocker
arm shaft and bearing
Factory spec.
0.016 to 0.045 mm
0.00063 to 0.00177 in.
Allowable limit
0.15 mm
0.0059 in.
Rocker arm shaft O.D. Factory spec.
15.973 to 15.984 mm
0.6289 to 0.6293 in.
Rocker arm I.D. for shaft Factory spec.
16.000 to 16.018 mm
0.6299 to 0.6306 in.
Push rod alignment Allowable limit
0.25 mm
0.0098 in.
KiSC issued 03, 2007 A