Bucket Cylinder; Removal; Installation - Komatsu PC20R-8 Shop Manual

REMOVAL AND INSTALLATION
REMOVAL OF THE BUCKET CYLINDER
Completely open the front equipment. Make the ne-
cessary movements to rest the bucket teeth on the
ground with the arm supported on a block «A».
1 - Stop the engine and release the pressures from the
cylinder (1) by moving the right-hand PPC valve lever
several times.
2 - Place a block «B» beneath the cylinder (1) and re-
move the pin (2).
3 - Start the engine and retract the piston rod (3).
H Bind the piston rod with wire to secure the fully re-
tracted position.
4 - Stop the engine and release any residual hydraulic
pressures. (For details, see «20. CONTROLS AND
ADJUSTMENTS»).
5 - Disconnect the hoses (4) and plug them. Also plug
the holes in the cylinder to prevent the entry of impu-
rities.
6 - Put a sling round the cylinder (1).
7 - Remove the pin (5).
8 - Remove the cylinder (1).
Bucket cylinder: PC20R-8: 11 kg
INSTALLATION OF THE

BUCKET CYLINDER

. To install, reverse the removal procedure.
When aligning the positions between the hole and
the pin, do not insert fingers in the holes to check
alignment.
H Adjust the shim thickness so that the clearance be-
tween cylinder and bucket link and between arm
and bucket link is below 1 mm.
Internal bushings: ASL800040
. Start the engine and bleed the air from the cylinder.
(For details, see «20. CONTROLS AND ADJUST-
MENTS»).
H After bleeding the air, check the oil level in the
tank.
30-60
PC27R-8: 12 kg
BUCKET CYLINDER
1
2
A
B
3
MAX.1mm
PC20R-8 PC27R-8
RKPA3590
5
4
RKPA3600
RKP06660