Piston And Connecting Rod Servicing; Balancer Shaft Side Clearance; Balance Shaft Alignment; Oil Clearance Of Balancer Shaft Journal - Kubota KX080-3 Workshop Manual

WSM KX080-3 Service
(3) Piston and Connecting Rod

Balancer Shaft Side Clearance

1. Set a dial indicator with tip on the balancer shaft.
2. Measure the side clearance by moving the balancer shaft to the
front and rear.
3. If the measurement exceeds the allowable limit, replace the
balancer shaft.
Factory spec.
Side clearance
Allowable limit

Balance Shaft Alignment

1. Support the balancer shaft with V blocks on the surface plate
and set a dial indicator with its tip on the intermediate journal at
high angle.
2. Rotate the balancer shaft on the V block and get the
misalignment (half of the measurement).
3. If the misalignment exceeds the allowable limit, replace the
balancer shaft.
Balancer shaft
Allowable limit
alignment

Oil Clearance of Balancer Shaft Journal

1. Measure the balancer shaft journal O.D. with an outside
micrometer.
2. Measure the cylinder block bore I.D. (A), (B) for balancer shaft
with an inside micrometer.
3. If the clearance exceeds the allowable limit, replace the balancer
shaft.
Factory spec.
Oil clearance of
balancer-shaft journal
Allowable limit
Balancer-shaft journal
Factory spec.
O.D.
Balancer-shaft bearing
Factory spec.
I.D. (A), (B)
(A) Balancer-shaft Bearing I.D.
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
III-S-155
0.070 to 0.22 mm
0.0028 to 0.0087 in.
0.3 mm
0.0118 in.
W1065273
0.02 mm
0.0008 in.
W1065448
0.070 to 0.159 mm
0.0028 to 0.0063 in.
0.2 mm
0.0079 in.
50.92 to 50.94 mm
2.0047 to 2.0055 in.
51.01 to 51.08 mm
2.0083 to 2.0110 in.
(B) Balancer-shaft Bearing I.D.
W1065581
30.000 to 30.013 mm
1.1811 to 1.1816 in.
30.05 mm
1.1831 in.
W1065759
Engine