Komatsu Galeo PC800-8 Shop Manual page 1058

SEN01058-00
Removal and installation of arm
cylinder assembly
Loading shovel
Removal
k
Retract boom cylinder fully, and extend arm
cylinder, then set the bottom of the bucket
horizontal, lower the work equipment com-
pletely to the ground and stop the engine.
Operate the control levers several times to
release the remaining pressure in the
hydraulic piping.
k
Loosen the oil filler cap slowly to release
the pressure inside the hydraulic tank.
a Fit blind plugs in the hoses after disconnecting
them, to prevent dirt or dust from entering.
1. Sling arm cylinder assembly, and remove plate,
then using forcing screws (Thread dia. = 16 mm,
Pitch = 2.0 mm), pull out pin (2).
a Pull out the pin to a position where the pis-
ton rod can be disconnected.
4
Pin: 60 kg
2. Start engine and retract piston rod fully.
k
Tie the rod with wire to prevent it from
coming out.
k
After stopping the engine, release the
pressure inside the piping.
For details, see Testing and adjusting,
"Releasing pressure in PPC circuit".
8
3. Disconnect hoses (3).
1
4. Sling piston rod end and bottom end, and
remove plate, then using forcing screws (Thread
dia. = 16 mm, Pitch = 2.0 mm), pull out pin (4).
a Pull out the pin to a position where the cyl-
inder bottom can be disconnected.
4
Pin: 60 kg
[*1]
5. Lift off arm cylinder assembly (5) carefully.
4
Arm cylinder assembly: 900 kg
50 Disassembly and assembly
PC800, 850-8
[*2]