Kubota WSM J Series Workshop Manual page 105

J SERIES, WSM
Top Clearance
1. Remove the cylinder head (remove the cylinder head gasket
completely).
2. Bring the piston to its top dead center fasten 1.5 mm dia. 5 to 7
mm long fuse wires to 3 to 4 spots on the piston top with grease
so as to avoid the intake and exhaust valves and the combustion
chamber ports.
3. Bring the piston to its middle position, install the cylinder head,
and tighten the cylinder head screws to specification. (Head
gasket must be changed to new one.)
4. Turn the crank shaft until the piston exceeds its top dead center.
5. Remove the cylinder head, and measure squeezed fuse wires for
thickness.
6. If the measurement is not within the specified value, check the oil
clearance of the crankpin journal and the piston pin.
NOTE

• After checking the top clearance, be sure to assemble the
cylinder head with a new cylinder head gasket.
Top clearance Factory spec.
Tightening
Cylinder head bolt
torque
(1) Fuse
S-59
ENGINE
Z482 0.50 to 0.70 mm
D722 0.0197 to 0.0276 in.
D1005 0.55 to 0.70 mm
V1305 0.0217 to 0.0276 in.
37.2 to 42.1 N·m
Z482
3.8 to 4.3 kgf·m
D722
28.0 to 31.7 ft-lbs
63.7 to 68.6 N·m
D1005
6.5 to 7.0 kgf·m
V1305
47.0 to 50.6 ft-lbs
W10107670
KiSC issued 10, 2016 A