Komatsu PC20R-8 Shop Manual page 293

PC27R-8
Boom:
Arm:
Bucket:
Boom swing: 588w59 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
PC20R-8 PC27R-8
569w57 Nm
539w54 Nm
441w44 Nm
539w54 Nm
1
Misura
Cylinder
standard
Boom 45
Arm 40
Bucket 35
Boom swing 40
Blade 35
Boom 40
Arm 35
Bucket 35
Boom swing 40
Blade 35
Boom 40
Arm 35
Bucket 35
Boom swing 40
Blade 35
M The figure represent arm cylinder
Boom: 785w78 Nm (Wrench size: 46 mm)
Arm: 785w78 Nm (Wrench size: 46 mm)
Bucket: 618w62 Nm (Wrench size: 41 mm)
Boom swing: 912w91 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
± 0.025 + 0.142 0.105 ±
± 0.064 + 0.080
± 0.090 + 0.142 0.170 ±
± 0.130 + 0.080
± 0.090 + 0.142 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
± 0.025 + 0.142 0.105 ±
± 0.064 + 0.080
± 0.090 + 0.142 0.170 ±
± 0.130 + 0.080
± 0.090 + 0.142 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
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
0.206
1.0
0.272
1.0
0.272
1.0
0.184
1.0
0.272
Replace
bushing
1.0
0.206
1.0
0.272
1.0
0.272
1.0
0.184
1.0
0.272
3
RKP01470
Unit: mm
Remedy
40-29