Cylinder - Komatsu PC20R-8 Shop Manual

CYLINDER

PC20R-8
Boom:
Arm:
Bucket:
Boom swing: 539w54 Nm
Blade:
2
No. Check item
Clearance
between
1
piston rod and
cylinder
Clearance
between
2
cylinder head
bushing and pin
Clearance
between
3
cylinder bottom
bushing and pin
40-28
490w49 Nm
490w49 Nm
412w41 Nm
490w49 Nm
1
Stan-
Cylinder
dard size
Boom 40
Arm 40
Bucket 35
Boom swing 40
Blade 35
Boom 35
Arm 35
Bucket 30
Boom swing 40
Blade 35
Boom 35
Arm 35
Bucket 30
Boom swing 40
Blade 35
M The figure represent arm cylinder
Boom: 618w62 Nm (Wrench size: 41 mm)
Arm: 785w78 Nm (Wrench size: 46 mm)
Bucket: 412w41 Nm (Wrench size: 36 mm)
Boom swing: 539w54 Nm (Wrench size: 46 mm)
Blade: 618w62 Nm (Wrench size: 41 mm)
Criteria
Tolerance
Standard
clearance
Shaft Hole
± 0.025 + 0.039 0.025 ±
± 0.087 0
± 0.025 + 0.039 0.025 ±
± 0.087 0
± 0.025 + 0.039 0.025 ±
± 0.087 0
± 0.025 + 0.039 0.025 ±
± 0.087 0
± 0.025 + 0.039 0.025 ±
± 0.087 0
± 0.090 + 0.142 0.170 ±
± 0.130 + 0.080
± 0.090 + 0.142 0.170 ±
± 0.130 + 0.080
± 0.090 + 0.117 0.170 ±
± 0.130 + 0.080
± 0.010 + 0.134 0.082 ±
± 0.050 + 0.072
± 0.090 + 0.142 0.170 ±
± 0.130 + 0.080
± 0.090 + 0.142 0.170 ±
± 0.130 + 0.080
± 0.090 + 0.142 0.170 ±
± 0.130 + 0.080
± 0.090 + 0.117 0.170 ±
± 0.130 + 0.080
± 0.010 + 0.134 0.082 ±
± 0.050 + 0.072
± 0.090 + 0.142 0.170 ±
± 0.130 + 0.080
Loctite 262
RKP01480
Limit
clearance
0.426
0.126
0.426
0.126 Replace
cylinder head
0.426
0.126
0.426
0.126
0.426
0.126
1.0
0.272
1.0
0.272
1.0
0.247
1.0
0.184
1.0
0.272
Replace
bushing
1.0
0.272
1.0
0.272
1.0
0.247
1.0
0.184
1.0
0.272
PC20R-8 PC27R-8
3
Unit: mm
Remedy