Kubota WSM STa-30, Workshop Manual

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1-S22
ST
α
-30 · ST
α
-35, WSM ENGINE
Top Clearance
1. Remove the cylinder head.
2. Move the piston up and stick a strip of fuse on the piston head at
three position with grease.
3. Lower the piston and install the cylinder head. (Use a new
cylinder head gasket and tighten with a specified tightening
torque.)
4. Turn the flywheel until the piston passes through the T.D.C..
5. Remove the cylinder head and measure the thickness of the
fuses.
6. If the measurement is not within the factory specifications, check
the oil clearances between the crankpin and bearing and
between the piston pin and bushing.
W1020190
(2) Disassembling and Assembling
(A) Cylinder Head and Valves
Cylinder Head Cover
1. Remove the breather hose.
2. Remove the head cover screws.
3. Remove the cylinder head cover (1).
(When reassembling)
• Check to see if the cylinder head cover gasket is not defective.
W1020618
Injection Pipes
1. Loosen the screws on the pipe clamps.
2. Detach the injection pipes.
(When reassembling)
• Sent compressed air into the pipes to blow out dust. Then,
reassemble the pipes in the reverse order.
W1020811
Top clearance Factory spec.
0.55 to 0.70 mm
0.0217 to 0.0276 in.
Tightening torque Cylinder head screws
93.1 to 98.0 N·m
9.5 to 10.0 kgf·m
68.7 to 72.3 ft-lbs
(1) Piston (2) Fuse
Tightening torque Cylinder head cover screw
6.9 to 11.3 N·m
0.7 to 1.15 kgf·m
5.1 to 8.32 ft-lbs
(1) Cylinder Head Cover
Tightening torque Injection pipe retaining nut
24.5 to 34.3 N·m
2.5 to 3.5 kgf·m
18.1 to 25.3 ft-lbs
KiSC issued 11, 2006 A