Komatsu PC20R-8 Shop Manual page 255

REMOVAL AND INSTALLATION
REMOVAL OF THE ARM
1 - Remove the bucket. (For details, see «REMOVAL OF
THE BUCKET»).
2 - Remove the pin (1) and completely retract the piston
rod (2).
3 - Put the arm (2) into a vertical position and rest the
boom on a block.
4 - Disconnect the R.H. and L.H. brackets (3).
5 - Disconnect the tubes (4) of bucket cylinder command
(5).
H Plug the tubes and the holes on the cylinder to
prevent entry of impurities.
6 - Put a sling round the cylinder (5).
7 - Remove the pin (6) and take out the cylinder (5) com-
pletely of levels.
Complete cylinder: 35 kg
8 - Position a block «A» beneath the arm cylinder com-
mand (7).
9 - Remove the pin (8) completely retract the piston rod
(9).
10 - Put a sling round the arm (10) and apply a slight ten-
sion to the cables.
11 - Remove the pin (11) and take out the arm (10).
Arm: PC20R-8: 35 kg
PC27R-8: 50 kg
Long arm: PC20R-8: 48 kg
PC27R-8: 70 kg
PC20R-8 PC27R-8
2
6
4
5
7
9
8
10
ARM
1
RKPA3720
3
RKPA3730
A
RKPA3571
11
RKPA3740
30-73