Komatsu Utility PC12R-8 MISTRAL, Shop Manual

Page: 319 / 324

Unit: mm
No. Check item Criteria Remedy
1
Clearance
between
piston rod and
cylinder
Cylinder
Standard
size
Tolerance
Standard
clearance
Repair
limit
Replace
cylinder head
Shaft Hole
Boom 35
±0.025
±0.087
+0.039
0
0.025±
0.126
0.426
Arm 35
±0.025
±0.087
+0.039
0
0.025±
0.126
0.426
Bucket 30
±0.020
±0.072
+0.033
0
0.020±
0.105
0.405
Boom
swing
30
±0.020
±0.072
+0.033
0
0.020±
0.105
0.405
Blade 35
±0.025
±0.087
+0.039
0
0.025±
0.126
0.426
Variable
undercarriage
30
±0.020
±0.072
+0.033
0
0.020±
0.105
0.405
2
Clearance
between
cylinder head
bushing and pin
Boom 35 Ð
+0.134
+0.072
Ð 0.1
Replace
bushing
Arm 30 Ð
+0.099
+0.040
Ð 0.1
Bucket 30 Ð
+0.099
+0.040
Ð 0.1
Boom
swing
30 Ð
+0.099
+0.040
Ð 0.1
Blade 35 Ð
+0.134
+0.072
Ð 0.1
Variable
undercarriage
30 Ð
+0.099
+0.040
Ð 0.1
3
Clearance
between
cylinder bottom
bushing and pin
Boom 35 Ð
+0.134
+0.072
Ð 0.1
Arm 30 Ð
+0.099
+0.040
Ð 0.1
Bucket 30 Ð
+0.099
+0.040
Ð 0.1
Boom
swing
30 Ð
+0.099
+0.040
Ð 0.1
Blade 35 Ð
+0.134
+0.072
Ð 0.1
Variable
undercarriage
30 Ð
+0.099
+0.040
Ð 0.1
CYLINDERS
PC15R-8
40-35
PC12R-8 PC15R-8
RKP00530
3
2
1
Boom: 441 w 44.1 Nm
Arm: 412 w 41.2 Nm
Bucket: 392 w 39.2 Nm
Boom swing: 441 w 44.1 Nm
Blade: 539 w 53.9 Nm
Variable gauge
undercarriage: 392 w 39 Nm
Loctite 262
Boom: 324 w 32.4 Nm (Wrench size: 32 mm)
Arm: 412 w 41.2 Nm (Wrench size: 32 mm)
Bucket: 324 w 32.4 Nm (Wrench size: 32 mm)
Boom swing: 324 w 32.4 Nm (Wrench size: 32 mm)
Blade: 618 w 61.8 Nm (Wrench size: 41 mm)
Variable gauge
undercarriage: 539 w 54 Nm (Wrench size: 32 mm)