Komatsu PC20R-8 Shop Manual page 281

1.5w0.2 Nm
(0.15w0.02 kgm)
53.0w5.9 Nm
(5.4w0.6 kgm)
139.7w22.1 Nm
(14.25w2.25 kgm)
No. Check item
Pressure compensation
1
valve spring
Pressure compensation
2
valve spring
3 Unload valve spring
Pressure compensation
4
valve spring
5 Cooler check valve spring
Back pressure check
6
valve spring
7 Spool return spring (hammer)
PC20R-8 PC27R-8
7
Section C ± C
Sezione C - C
Free length
x é.D.
16.8x8.4
20x8.4
28.94x11.8
38.2x9.2
29.1x18.7
27.2x13.2
29x17.5
Criteria
Standard size
Installed Installed
length load
7.64 N
15
(0.78 kg)
6.86 N
12
(0.7 kg)
22.5 N
13
(2.3 kg)
30.4 N
20
(3.1 kg)
82.4 N
18
(8.4 kg)
78.8 N
21
(8.04 kg)
22.6 N
28.5
(2.3 kg)
1
1
1
1
2
2
2
3
4
139.7w22.1 Nm
(14.25w2.25 kgm)
5
6
RKP01611
Repair limit
Free Installed
length load
6.11 N
Ð
(0.62 kg)
5.49 N
Ð
When
(0.56 kg)
damage or
18 N
Ð deformation
(1.84 kg)
is found,
24.3 N
replace the
Ð
(2.5 kg) spring
65.9 N
Ð
(6.7 kg)
63 N
Ð
(6.43 kg)
18.1 N
Ð
(1.84 kg)
Unit: mm
Remedy
40-17