Komatsu ecot3 PC300LC-8 Shop Manual page 245

10 Structure, function and maintenance standard
Bucket cylinder
No. Check item
Clearance between
1
piston rod and bushing
Clearance between
2
piston rod support
shaft and bushing
Clearance between
3
cylinder bottom support
shaft and bushing
PC300, 350-8
Standard
Cylinder
size
-0.036
Boom 100
-0.090
-0.036
Arm 110
-0.090
-0.030
Bucket 100
-0.076
-0.030
Boom 100
-0.060
-0.030
Arm 100
-0.076
-0.030
Bucket 90
-0.076
-0.030
Boom 90
-0.060
-0.030
Arm 100
-0.076
-0.030
Bucket 90
-0.060
Criteria
Tolerance
Standard
clearance
Shaft Hole
+0.035 0.041 –
+0.005
+0.261 0.083 –
+0.047
+0.257 0.083 –
+0.047
+0.190 0.100 –
+0.070
+0.190 0.105 –
+0.070
+0.190 0.100 –
+0.070
+0.190 0.075 –
+0.070
+0.190 0.105 –
+0.070
+0.190 0.100 –
+0.070
SEN01995-01
Clearance
limit
0.412
0.125
Replace bushing
0.412
0.351
0.447
0.347
—
0.250
—
0.251
—
0.246
Replace pin or
—
0.225
—
0.251
—
0.230
Unit: mm
Remedy
bushing
53