Kubota M108S, Workshop Manual

Page: 131 / 523

1-S8
M108S, WSM ENGINE
ENGINE BODY (Continued)
W1013874
Item Factory Specification Allowable Limit
Timing Gear
Idle Gear 1 to Crank Gear
Idle Gear 1 to Cam Gear
Idle Gear 1 to Idle Gear 2
Idle Gear 2 to Supply Pump Gear
Cam Gear to Balancer Gear 1
Idle Gear 1 to Balancer Gear 2
Backlash
Backlash
Backlash
Backlash
Backlash
Backlash
0.0490 to 0.193 mm
0.00193 to 0.00759 in.
0.0490 to 0.189 mm
0.00193 to 0.00744 in.
0.0440 to 0.185 mm
0.00174 to 0.00728 in.
0.0440 to 0.177 mm
0.00174 to 0.00696 in.
0.0470 to 0.182 mm
0.00185 to 0.00716 in.
0.0440 to 0.183 mm
0.00174 to 0.00720 in.
0.22 mm
0.0087 in.
0.22 mm
0.0087 in.
0.22 mm
0.0087 in.
0.22 mm
0.0087 in.
0.22 mm
0.0087 in.
0.22 mm
0.0087 in.
Idle Gear Shaft 1, 2 to Idle Gear 1, 2
Bushing
Idle Gear 1, 2 Bushing
Idle Gear 1, 2 Shaft
Oil Clearance
I.D.
O.D.
0.050 to 0.091 mm
0.0020 to 0.0035 in.
45.025 to 45.050 mm
1.7727 to 1.7736 in.
44.959 to 44.975 mm
1.7701 to 1.7706 in.
0.10 mm
0.0039 in.
–
–
Idle Gear Side Clearance 0.15 to 0.30 mm
0.0059 to 0.011 in.
0.9 mm
0.04 in.
Balancer Shaft Side Clearance 0.070 to 0.22 mm
0.0028 to 0.0086 in.
0.3 mm
0.01 in.
Balancer Shaft Alignment – 0.02 mm
0.0008 in.
Balancer Shaft
Balancer Shaft Journal
Balancer Bearing
Oil Clearance
O.D.
I.D.
0.0700 to 0.159 mm
0.00276 to 0.00625 in.
50.920 to 50.940 mm
2.0048 to 2.0055 in.
51.01 to 51.08 mm
2.009 to 2.011 in.
0.2 mm
0.008 in.
–
–
Piston Pin Bore I.D. 30.000 to 30.013 mm
1.1811 to 1.1816 in.
30.05 mm
1.183 in.
Top Ring to Ring Groove Clearance 0.05 to 0.09 mm
0.002 to 0.003 in.
0.15 mm
0.0059 in.
Second Ring to Ring Groove Clearance 0.0930 to 0.120 mm
0.00366 to 0.00472 in.
0.20 mm
0.0079 in.
Oil Ring to Ring Groove Clearance 0.020 to 0.060 mm
0.00079 to 0.0023 in.
0.15 mm
0.0059 in.
KiSC issued 06, 2007 A