Komatsu Galeo PC800-8 Shop Manual page 1069

50 Disassembly and assembly
Removal and installation of arm
assembly
Loading shovel
Removal
1. Remove bucket assembly.
For details, see "Removal and installation of
bucket assembly".
2. Lower the tip of the arm assembly to the ground.
3. Sling arm cylinder assembly (1) temporarily
and disconnect the rod side from the arm.
For details, see "Removal and installation of
arm cylinder assembly".
a Secure the arm cylinder assembly to the
boom with lever block [1].
k
After stopping the engine, release the
residual pressure in the piping. For
details, see Testing and adjusting,
"Releasing residual pressure in PPC
valve hydraulic circuit".
4. Disconnect right and left bottom dump cylinder
hoses (2).
5. Disconnect right and left bucket cylinder hoses
(3) and (4), 2 pieces on each side.
PC800, 850-8
6. Sling arm assembly, and remove 3 mounting
bolts, then using forcing screws (Thread dia. =
1
16 mm, Pitch = 2.0 mm), pull out pin (5).
a Pull out the pin on the other side in the
same way to a position where the arm can
be disconnected from the boom.
4
Pin: 45 kg
7. Lift off arm assembly (6).
4
Arm assembly: 3,100 kg
Installation
Carry out installation in the reverse order to
q
removal.
[*1]
k
When aligning the mounting position of the
pin, do not insert your fingers in the pin hole.
a Bleed the air from the work equipment circuit.
For details, see Testing and adjusting, "Bleed-
ing air from hydraulic cylinder".
After completion of the air bleeding operation,
add engine oil to the hydraulic tank to the
specified level.
SEN01058-00
[*1]
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