SEN01057-01 50 Disassembly and assembly
2 PC800, 850-8
Hydraulic system 1
Removal and installation of
hydraulic tank assembly 1
Removal
k Swing the frame to set the hydraulic tank
between the right and left track shoes.
k Lower the work equipment to the ground
and stop the engine.
k Loosen the cap of the hydraulic tank gradu-
ally to release the internal pressure of the
hydraulic tank.
a Before disconnecting the hoses, make match
marks on them.
a Install oil stopper plugs to the disconnected
tubes and hoses.
1. Drain the hydraulic oil.
6 Hydraulic oil: 470 l
2. Remove control valve cover (1).
3. Remove control valve cover bracket (2).
4. Disconnect piping clamps (3) and (4).
5. Disconnect brackets (5).
6. Disconnect drain filter assembly bracket (6)
from the hydraulic tank.
7. Disconnect pilot filter bracket (7) from the
hydraulic tank.
8. Disconnect hoses (8) – (10).
9. Disconnect tube (11).
10. Disconnect hose (12) from the oil cooler.
11. Disconnect hose (13) between the return filter
and oil cooler.
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