Komatsu PC20R-8 Shop Manual page 280

1
1
1
1
2
2
3
3
8.3w1.5 Nm
(0.85w0.15 kgm)
1
8.3w1.5 Nm
(0.85w0.15 kgm)
No. Check item
Spool return spring
1
(arm, swing, arm, bucket)
Spool return spring
2
(boom, blade)
Spool return spring
3
(travel)
40-16
Section B ± B
Sezione B - B
Standard size
Free length Installed
x é.D. length
29x17.5 28.5
46.2x20 25.4
42x20 25.4
RKP01621
Criteria
Repair limit
Installed Free
load length
22.6 N
Ð
(2.3 kg)
98 N
Ð
(10 kg)
74.5 N
Ð
(7.6 kg)
Unit: mm
Remedy
Installed
load
When
damage or
18.1 N
deformation
(1.84 kg)
is found,
replace the
78.4 N
spring
(8 kg)
59.6 N
(6.1 kg)
PC20R-8 PC27R-8