Komatsu F30791, Shop Manual

Page: 292 / 298

Unit: mm
No. Check item Criteria Remedy
1
Clearance
between
piston rod and
cylinder
Cylinder
Stan-
dard size
Tolerance
Standard
clearance
Limit
clearance
Replace
cylinder head
ShaftHole
Boom 40
± 0.025
± 0.087
+ 0.039
0
0.025 ±
0.126
0.426
Arm 40
± 0.025
± 0.087
+ 0.039
0
0.025 ±
0.126
0.426
Bucket35
± 0.025
± 0.087
+ 0.039
0
0.025 ±
0.126
0.426
Boom swing 40
± 0.025
± 0.087
+ 0.039
0
0.025 ±
0.126
0.426
Blade 35
± 0.025
± 0.087
+ 0.039
0
0.025 ±
0.126
0.426
2
Clearance
between
cylinder head
bushing and pin
Boom 35
± 0.090
± 0.130
+ 0.142
+ 0.080
0.170 ±
0.272
1.0
Replace
bushing
Arm 35
± 0.090
± 0.130
+ 0.142
+ 0.080
0.170 ±
0.272
1.0
Bucket30
± 0.090
± 0.130
+ 0.117
+ 0.080
0.170 ±
0.247
1.0
Boom swing 40
± 0.010
± 0.050
+ 0.134
+ 0.072
0.082 ±
0.184
1.0
Blade 35
± 0.090
± 0.130
+ 0.142
+ 0.080
0.170 ±
0.272
1.0
3
Clearance
between
cylinder bottom
bushing and pin
Boom 35
± 0.090
± 0.130
+ 0.142
+ 0.080
0.170 ±
0.272
1.0
Arm 35
± 0.090
± 0.130
+ 0.142
+ 0.080
0.170 ±
0.272
1.0
Bucket30
± 0.090
± 0.130
+ 0.117
+ 0.080
0.170 ±
0.247
1.0
Boom swing 40
± 0.010
± 0.050
+ 0.134
+ 0.072
0.082 ±
0.184
1.0
Blade 35
± 0.090
± 0.130
+ 0.142
+ 0.080
0.170 ±
0.272
1.0
CYLINDER
PC20R-8
M The figure representarm cylinder
40-28
PC20R-8 PC27R-8
RKP01480
3
2
1
Boom: 490 w 49 Nm
Arm: 490 w 49 Nm
Bucket: 412 w 41 Nm
Boom swing: 539 w 54 Nm
Blade: 490 w 49 Nm
Boom: 618 w 62 Nm (Wrench size: 41 mm)
Arm: 785 w 78 Nm (Wrench size: 46 mm)
Bucket: 412 w 41 Nm (Wrench size: 36 mm)
Boom swing: 539 w 54 Nm (Wrench size: 46 mm)
Blade: 618 w 62 Nm (Wrench size: 41 mm)
Loctite 262