Komatsu F30791, Shop Manual

Page: 281 / 298

Unit: mm
No. Check item Criteria Remedy
1
Pressure compensation
valve spring
Standard size Repair limit
When
damage or
deformation
is found,
replace the
spring
Free length
x é.D.
Installed
length
Installed
load
Free
length
Installed
load
16.8x8.4 15
7.64 N
(0.78 kg)
Ð
6.11 N
(0.62 kg)
2
Pressure compensation
valve spring
20x8.4 12
6.86 N
(0.7 kg)
Ð
5.49 N
(0.56 kg)
3 Unload valve spring 28.94x11.8 13
22.5 N
(2.3 kg)
Ð
18 N
(1.84 kg)
4
Pressure compensation
valve spring
38.2x9.2 20
30.4 N
(3.1 kg)
Ð
24.3 N
(2.5 kg)
5 Cooler check valve spring 29.1x18.7 18
82.4 N
(8.4 kg)
Ð
65.9 N
(6.7 kg)
6
Back pressure check
valve spring
27.2x13.2 21
78.8 N
(8.04 kg)
Ð
63 N
(6.43 kg)
7 Spool return spring (hammer) 29x17.5 28.5
22.6 N
(2.3 kg)
Ð
18.1 N
(1.84 kg)
40-17
PC20R-8 PC27R-8
RKP01611
Sezione C - C
1
2
3
4
5
6
7
1
1
1
2
2
1.5 w 0.2 Nm
(0.15 w 0.02 kgm)
53.0 w 5.9 Nm
(5.4 w 0.6 kgm)
139.7 w 22.1 Nm
(14.25 w 2.25 kgm)
139.7 w 22.1 Nm
(14.25 w 2.25 kgm)
SectionC ± C