Piston And Connecting Rod - Kubota BX24 Workshop Manual

BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM

(3) Piston and Connecting Rod

Piston Pin Bore I.D.
1. Measure the piston pin bore I.D. in both the horizontal and
vertical directions with a cylinder gauge.
2. If the measurement exceeds the allowable limit, replace the
piston.
Factory spec.
Piston pin bore I.D.
Allowable limit
Oil Clearance between Piton Pin and Small End Bushing
1. Measure the piston pin O.D. where it contacts the bushing with
an outside micrometer.
2. Measure the small end bushing I.D. with an inside micrometer,
and calculate the oil clearance.
3. If the oil clearance exceeds the allowable limit, replace the
bushing. If it still exceeds the allowable limit, replace the piston
pin.
Factory spec.
Oil clearance between
piston pin and small end
bushing
Allowable limit
Piston pin O.D. Factory spec.
Small end bushing I.D. Factory spec.
Replacing Small End Bushing
(When removing)
1. Press out the used bushing using a small end bushing replacing
tool. (Refer to "SPECIAL TOOLS")
(When installing)
1. Clean a new small end bushing and small end hole, and apply
engine oil to them.
2. Using a small end bushing replacing tool, press in a new bushing
(service parts) taking care to see that the position of the
connecting rod oil hole matches the bushing hole.
[Servicing parts dimension]
Factory spec.
Oil clearance between
piston pin and small end
bushing (Spare parts)
Allowable limit
Small end bushing I.D.
Factory spec.
(Spare parts)
(1) Seam
(2) Oil Hole
1-S50
ENGINE
20.000 to 20.013 mm
0.78740 to 0.78791 in.
20.05 mm
0.7894 in.
W11406200
0.014 to 0.038 mm
0.00055 to 0.00150 in.
0.10 mm
0.0039 in.
20.002 to 20.011 mm
0.78748 to 0.78783 in.
20.025 to 20.040 mm
0.78839 to 0.78897 in.
W11420110
0.015 to 0.075 mm
0.00059 to 0.00295 in.
0.15 mm
0.0059 in.
20.026 to 20.077 mm
0.78843 to 0.79043 in.
(A) When Removing
(B) When Installing
(a) 0.785 rad (45)
W11437590
KiSC issued 08, 2019 A