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

REMOVAL AND INSTALLATION
REMOVAL OF THE BLADE CYLINDER
Lower the working equipment to the ground with all
safety devices engaged. Rest the back of the bucket
on the ground with the arm in a vertical position.
1 - Remove the protection (1).
H Place a supporting block «A» beneath the cylin-
der.
2 - Stop the engine, release the pressures in the cylinder
(2) by moving the command lever several times in
both directions.
3 - Remove the pin (3).
4 - Start the engine to retract the piston (4).
H Bind the piston rod with wire to secure the fully re-
tracted position.
5 - Stop the engine and release the residual hydraulic
pressures. (For details, see «20. CONTROLS AND
ADJUSTMENTS»).
6 - Disconnect the tubes (5) and plug them. Also plug the
holes in the cylinder to prevent entry of impurities.
7 - Remove the pin (7).
8 - Remove the cylinder (2).
Blade cylinder: 13 kg
INSTALLATION OF THE

BLADE CYLINDER

. To install, reverse the removal procedure.
When aligning the positions between the hole and
the pin, turn the engine over at low idling.
Do not insert fingers in the holes to check alignment.
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.
PC20R-8 PC27R-8
BLADE CYLINDER
2
5
4
A
1
RKPA3650
3
RKPA3660
30-63