Komatsu F30791, Shop Manual

Page: 243 / 298

REMOVAL OF THE BOOM SWING CYLINDER
Swing the work equipment approx. 45ë to the left
and extend completely the boom swing 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 verticalposition.
1 - Stop the engine and move the command pedalboom
swing cylinder several times to release residual pres-
sures.
2 - Remove the pin (1) and disengage the piston rod (2)
from swing support (3).
3 - Start the engine and retract the piston rod (4) comple-
tely.
H Bind the piston rod with wire to secure the fully re-
tracted position.
4 - Stop the engine and move the command pedalboom
swing cylinder several times to release residual pres-
sures. (For details, see «20. CONTROLS AND AD-
JUSTMENTS»).
5 - Only forcab version.
Remove the cab floor (4). (For details, see «RE-
MOVAL OF CAB»).
6 - Remove the accumulator (5).
H Disconnect first the negative terminal(±) and then
the positive te).
7 - Disconnect the hoses (4) and plug them. Also plug
the holes in the cylinder to prevent the entry of impu-
rities.
30-61
REMOVAL AND INSTALLATION BOOM SWING CYLINDER
PC20R-8 PC27R-8
RKPA3610
RKPA3620
3
1
2
RKPA3411
5
4
RKPA3630
6
7