Removal And Installation Of Swing Motor And Swing Machinery Assembly - Komatsu ecot3 PC300LC-8 Shop Manual

50 Disassembly and assembly
Removal and installation of swing
motor and swing machinery assembly
Removal
k
Release the remaining pressure in the
hydraulic circuit. For details, see Testing
and adjusting, "Release of remaining pres-
sure in hydraulic circuit".
k
Lower the work equipment to the ground
for safety. After stopping the engine, loosen
the oil filler cap on the hydraulic tank to
release the residual pressure inside the
tank.
k
Move the work equipment lock lever to the
LOCK position.
k
Disconnect the negative (–) terminal from
battery.
1. Disconnect 5 swing motor hoses (1) through (5).
q (1): Between the swing motor and con-
trol valve (port MA)
q (2): Between the swing motor and con-
trol valve (port MB)
q (3): Suction hose (port S)
(4): Drain hose (port T)
q
q (5): Pilot hose for relieving swing brake
(port B)
2. Disconnect arm cylinder hoses (6).
3. Remove the mounting bolts.
4. Tighten a forcing screw in position (a) shown in
the following figure to separate the swing
motor and swing machinery assembly.
PC300, 350-8
5. Lift and remove swing motor and swing
machinery assembly (7).
a When lifting off the swing motor and swing
machinery assembly for removal, do so
slowly so that the hoses and other parts
may not be damaged.
a Take care in the lift until you can pull out
the pilot.
4
Swing motor and swing machinery
assembly: 550 kg
Installation
q Installation is done in the reverse order of
removal.
[*1]
3
Mounting bolt:
[*1]
q Refilling with oil (hydraulic tank)
Refill hydraulic oil through the oil filler port to
the specified level. Let the oil circulate in the
hydraulic system by starting the engine. Then
check the oil level again.
q Air bleeding
Bleed the air from the circuit between the valve
and the hydraulic cylinder. For details, see
Testing and adjusting, "Bleeding air from vari-
ous parts".
SEN02637-02
824 – 1,030 Nm {84 – 105 kgm}
11