Kubota D650-B Handbuch Seite 154

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Checking Oil Clearance between Rocker Arm
Shaft and Bushing
1) Measure the rocker arm 1.0.
2) Measure the rocker arm
0.0.
3) If the clearance exceeds the allowable limit, replace.
to 10.984 mm
to
0.4324
in.
Reference value
Allowable Ii mit
Rocker arm
shaft O.D.
Rocker arm
bushing I.D.
4D
Checking Top Clearance
1) Remove the nozzle holder.
2) Lower the piston in the cylinder to be measured.
3) Insert a high-quality fuse from the nozzle holder hole. Be
careful not to let the fuse touch the valve surface.
4) Rotate the engine with your hand.
5) Take the fuse out carefully.
6) Measure the place where the fuse was crushed with vernier
calipers.
7) If the clearance is not within the reference value, adjust
by inserting a shim between the cylinder head and the
gasket.
Reference value
Thickness of gasket
when tightened
Thickness of gasket shim
158