Komatsu Galeo PC800-8 Shop Manual page 1062

SEN01058-00
Removal and installation of boom
cylinder assembly
Loading shovel
Removal
k
Extend the arm and bucket fully, lower the
work equipment completely to the ground
and stop the engine. Operate the control
levers several times to release the remain-
ing pressure in the hydraulic piping.
k
Loosen the oil filler cap slowly to release
the pressure inside the hydraulic tank.
a Fit plugs in the hoses after disconnecting them,
to prevent dirt or dust from entering.
1. Disconnect grease hose (1).
2. Remove plate (2).
3. Sling boom cylinder assembly, then using forc-
ing screws (Thread dia. = 16 mm, Pitch = 2.0
mm), pull out pin (3), and disconnect piston rod
from boom.
4. Start engine and retract piston rod fully.
k
Tie the rod with wire to prevent it from com-
ing out.
k
After stopping the engine, release the pres-
sure inside the piping.
For details, see Testing and adjusting,
"Releasing pressure in PPC circuit".
12
5. Lower boom cylinder assembly onto stand,
then disconnect hoses (4).
1
6. Sling boom cylinder assembly, and remove
plate, then using forcing screws (Thread dia. =
16 mm, Pitch = 2.0 mm), pull out foot pin (5).
[*1]
7. Remove boom cylinder assembly (6).
4
Boom cylinder assembly: 750 kg
50 Disassembly and assembly
PC800, 850-8
[*2]