Komatsu Utility PC12R-8 MISTRAL, Shop Manual, Page: 263 / 324

REMOVAL OF BOOM CYLINDER
Fully extend the arm and open the bucket complete-
ly. Lower the equipment until it rests on the ground.
1 - Remove the protection (1) and the relative shoes.
2 - Stop the engine, release the pressures in the cylinder
by moving the right-hand PPC valve lever several ti-
mes.
3 - Remove the pin (2).
4 - Lower the cylinder (3) until it rests on a stand «A».
H Bind the piston rod with wire to secure the fully re-
tracted position.
5 - Start the engine to retract the piston (4).
6 - Stop the engine and release the residual hydraulic
pressures. (For details, see «20. CONTROLS AND
ADJUSTMENTS»).
7 - Disconnect the tubes (5) and plug them. Also plug the
holes in the cylinder to prevent entry of impurities.
8 - Remove the pin (6).
9 - Remove the cylinder (3).
Boom cylinder:: PC12R: 10.7 kg
PC15R: 12 kg
INSTALLATION OF THE
BOOM CYLINDER
. To install, reverse the removal procedure.
H Check the centering and the smooth movement of
the protection (1) on the shoes (7).
Shoes and guides: ASL800050
H Insert the shims on both sides of the piston rod.
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 align-
ment.
Internalbushings: ASL800050
1 - 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 level of oil in the
tank.
30-63
REMOVAL AND INSTALLATION BOOM CYLINDER
PC12R-8 PC15R-8
RKPA1270
1
2
RKPA1280
6
3
5
4
A
RKPA1290
7
3
1