Komatsu PC20R-8 Shop Manual page 252

REMOVAL AND INSTALLATION
REMOVAL OF THE UPPER WORK EQUIPMENT
Fully extend the arm and open the bucket comple-
tely. Lower the equipment until it rests on the
ground.
Disconnect the negative terminal cable (±) from the
battery.
1 - Remove the protection (1) and the relative shoes.
2 - Remove the working beam (2).
3 - Stop the engine, release the pressures in the cylinder
by moving the PPC valve lever several times.
3 - Remove the pin (3).
5 - Lower the cylinder (2) until it rests on a stand «A».
6 - Start the engine to retract the piston (4).
H Bind the piston rod with wire to secure the fully re-
tracted position.
7 - Stop the engine and release the residual hydraulic
pressures. (For details, see «20. CONTROLS AND
ADJUSTMENTS»).
8 - Disconnect the hoses (5) (N
prevent entry of impurities.
H Remove the fixed working beam clips.
9 - Put a sling around the equipment and apply a slight
tension to the cables.
H Adjust the length of the cables to balance the
load.
30-70
. 10); plug the tubes to
o
UPPER WORK EQUIPMENT
3
4
5
A
7
2
1
4
RKPA3272
RKPA3521
5
RKPA3670
RKPA3680
PC20R-8 PC27R-8