Komatsu F30791, Shop Manual

Page: 290 / 298

Unit: mm
No. Check item Criteria Remedy
1
Centering spring
(P3 and P4 port)
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
38.7x15.5 34
9.8 N
(1.0 kg)
Ð
7.8 N
(0.8 kg)
2
Centering spring
(P1 and P2 port)
42.5x15.5 34
17.7 N
(1.8 kg)
Ð
14.1 N
(1.44 kg)
3 Metering spring 26.5x9.2 24.9
16.7 N
(1.7 kg)
Ð
13.7 N
(1.4 kg)
PPC VALVE
FOR BOOM, ARM, BUCKET, SWING
40-26
PC20R-8 PC27R-8
Sezione A - A Sezione B - B
Sezione C - C
Sezione D - D
Sezione E - E
RKP01330
1
3
2
3
112.8 w 14.7 Nm
(11.5 w 1.6 kgm)
44.1 w 4.9 Nm
(4.5 w 0.5 kgm)
13.2 w 1.5 Nm
(1.35 w 0.15 kgm)
8.33 w 2.45 Nm
(0.85 w 0.25 kgm)
6.37 w 2.45 Nm
(0.65 w 0.25 kgm)
SectionA ± A
SectionB ± B
SectionC ± C
SectionD ± D
SectionE ± E