Komatsu PC20R-8 Shop Manual page 247

REMOVAL AND INSTALLATION
5 - Raise the cylinder and hook the piston rod to the mo-
bile group of the tool C1.
6 - Extract the piston rod group (4) from the cylinder.
7 - Remove the cylinder (2) and the piston rod group.
8 - Lock the complete piston rod (4) onto the apparatus
C1.
9 - Attach the socket wrench C6 to the lock nut (5) of the
piston (6) and, using the dynamometric tool with a
multiplier C2, remove the nut.
H Socket wrench measurement:
Cylinder
Boom Arm
Model
PC20R-8 41 46
PC27R-8
46 46
10 - Take all the groups to pieces and remove all the
seals, guard rings and guide rings.
The seals, guard rings, and guide rings cannot
be used again.
PC20R-8 PC27R-8
Unit: mm
Boom
Bucket Blade
swing
36 46 41
41 46 41
WORK EQUIPMENT CYLINDERS
4
2
4 6
5
6 2
C C
1
C
RKPA1420
RKPA1430
30-65