50 Disassembly and assembly SEN01055-01
PC800, 850-8
11
Removal and installation of swing
motor and swing machinery
assembly 1
Removal
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.
k Release the residual pressure from the
hydraulic circuit. For details, see Testing
and adjusting, “Releasing residual pres-
sure from hydraulic circuit”.
a Before disconnecting the hoses, make match
marks on them. After disconnecting them,
install oil stopper plugs to them and swing
motor assembly.
a Prepare an oil receiver.
a Rear side
1. Disconnect hoses (1) and (2) coming from the
control valve and hoses (3) and (4) going to
the swing motor on the front side of the
machine.
2. Remove swing holding brake hose (5) and
drain hose (6).
3. Remove the mounting bolts and lift off swing
motor and swing machinery assembly (7). [*1]
4 Swing motor and swing machinery
assembly: 570 kg
a Front side
1. Disconnect hoses (8) and (9) coming from the
swing motor at the middle of the machine.
2. Remove swing holding brake hose (10) and
drain hose (11).
3. Disconnect hose (12) from the swivel joint.
4. Disconnect horn assembly (13).
5. Remove spacer (14).
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