Checking Oil Clearance Between Piston Pin And Small End Bushing; Replacing Small End Bushing - Kubota WSM 05-E4B Series Workshop Manual

SERVICING
6. Servicing
1. Measure the piston pin bore I.D. in the horizontal
and vertical directions with a cylinder gauge.
NOTE
• If the measurement is more than the service
limit, replace the piston.
Service specifi-
cation
Piston pin bore
I.D.
Service limit
6.25 Checking oil clearance between
piston pin and small end bushing
Tools required
• Outside micrometer
• Inside micrometer or cylinder gauge
1. Measure the piston pin O.D. at where it contacts the
bushing with an outside micrometer.
Service specifi-
Piston pin O.D.
cation
2. Measure the small end bushing I.D. at the small
end of connecting rod with an inside micrometer or
cylinder gauge.
05-E4B SERIES,05-E4BG SERIES
22.000 to 22.013 mm
0.86615 to 0.86665 in.
22.03 mm
0.08673 in.
22.002 to 22.011 mm
0.86622 to 0.86657 in.
Small end bushing Service specifi-
I.D. cation
3. Calculate the oil clearance.
NOTE
• If the oil clearance is more than the service
limit, replace the bushing.
• If the oil clearance is still more than the
service limit, replace the piston pin.
Service specifi-
Oil clearance be-
cation
tween piston pin
and small end
Service limit
bushing

6.26 Replacing small end bushing

Tools required
• Small end bushing replacing tool
Removing small end bushing
1. Press out the used small end bushing with small
end bushing replacing tool.
(A) Removing direction
Installing small end bushing
1. Clean a new small end bushing and bore.
2. Insert the new small end bushing onto the tool.
4. ENGINE
22.025 to 22.040 mm
0.86713 to 0.86771 in.
0.014 to 0.038 mm
0.00056 to 0.0014 in.
0.15 mm
0.0059 in.
4-61
KiSC issued 03, 2023 A