Kubota D650-B Handbuch Seite 176

. ­
OOllP08:-t
..
••
1.25 mm
0.0492
in.
.., Checking Piston Ring Clearance
1) Put the piston ring in the cylinder.
2) Turn the piston upside down and push the ring into the
cylinder with the piston head.
3) Insert a feeler gauge into the piston ring gap.
4) If the clearance exceeds the allowable limit, replace.
(Important)
• Measure the piston ring gap at the point of the minimum
inside diameter of the cylinder liner .
0650·B 0750·B 0850·B OH850·B
0950·B
1.25 mm
0.0492
in.
o
Checking Side Clearance of Ring in Groove
1) Remove the piston ring from the piston.
2) Place the ring in its groove as is shown at left, and measure
the clearance.
3) If the clearance is not within the reference value, replace
the ring.
(Note)
• As the top ring is a keystone type, it cannot be measured
by this method.
OOllP087
Second ring
Oil ring
o
Checking Connecting Rod Alignment
1) Remove the connecting rod crank pin bearing and tighten
the rod bolts.
2) Set the connecting rod to a connecting rod aligner.
3) Place the gauge on the piston pin. Measure the gap be·
tween the pin of the gauge and the flat su rface of the
aligner.
4) If the measurement exceeds the allowable limit, replace.
(I mportant)
• Because the 1.0. of the connecting rod small end bushing
is used as the basis for this check, check it is not worn
beforehand.
Reference
Allowable limit
180