Komatsu PC20R-8 Shop Manual page 286

PC27R-8
177w10 Nm
A
157w10 Nm
8.8w1 Nm
No. Check item
1 Check valve spring
Clearance between
2
piston and cylinder
Clearance between
3
shoe and piston
40-22
2
Section A ± A
Sezione A - A
Standard size
Free
length
30.1
Standard clearance
0.03 ± 0.15
0.01 ± 0.02
39w2 Nm
Criteria
Installed Installed
length load
15.7 2.3 N
A
3
1
RKP01550
Repair limit
Free Installed
length load
25.5 1.6 N
Clearance limit
0.4
0.4
PC20R-8 PC27R-8
Unit: mm
Remedy
When
damage or
deformation
is found,
replace the
spring
Replace