50 Disassembly and assembly SEN01057-01
PC800, 850-8
25
Removal and installation of swing
motor assembly 1
Removal
k Lower the work equipment to touch the
ground completely and stop the engine.
k 1) Referring to the section “Releasing
remaining pressure from hydraulic cir-
cuit” on PPC valve installed machines
in the “Testing and adjusting”, release
the remaining pressure from the
hydraulic circuit.
2) Slowly loosen the cap of the hydraulic
oil tank to release the inside pressure
of the hydraulic oil tank.
Center side of the machine body
1. Separate hoses (1) and (2) from the control
valve and separate hoses (3) and (4) from the
swing motor positioned in the front section of
the machine body.
2. Separate swing holding brake hose (5) and
drain hose (6).
3. Remove U-bolt (7) of the oil gauge tube,
remove bolt (8) and remove bracket (9).
Front side of the machine body
1. Separate the hoses (10) and (11) from the
swing motor positioned in the central section of
the machine body.
2. Separate the swing holding brake hose (12)
and the drain hose (13).
3. Remove bolt (15) and remove bracket (16).
4. Separate the swivel joint section hose (14).
5. Loosen 4 bolts (17) and remove swing motor
assembly (18), (19).
4 Swing motor assembly: 57 kg × 2
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