7-54
1. REMOVAL AND INSTALL OF MOTOR
REMOVAL
Lower the work equipment to the ground
and stop the engine.
Operate the control levers and pedals
several times to release the remaining
pressure in the hydraulic piping.
Loosen the breather slowly to release the
pressure inside the hydraulic tank.
Escaping fluid under pressure can
penetrate the skin causing serious injury.
When pipes and hoses are disconnected,
the oil inside the piping will flow out, so
catch it in oil pan.
Disconnect hose assembly(2, 3).
Disconnect pilot line hoses(4, 5, 6, 7, 8).
Sling the swing motor assembly(1) and
remove the swing motor mounting bolts
(9).
Motor device weight : 23kg(51lb)
Remove the swing motor assembly.
When removing the swing motor
assembly, check that all the piping have
been disconnected.
INSTALL
Carry out installation in the reverse order
to removal.
Bleed the air from the swing motor.
Remove the air vent plug.
Pour in hydraulic oil until it overflows from
the port.
Tighten plug lightly.
Start the engine, run at low idling and
check oil come out from plug.
Tighten plug fully.
Confirm the hydraulic oil level and check
the hydraulic oil leak or not.
1)
(1)
(2)
(3)
ö
(4)
(5)
(6)
ö
(7)
ö
GROUP 5 SWING DEVICE
2)
(1)
(2)
Η
Θ
Ι
Κ
Λ
(3)
A
B
Mu
2
3
1
9
PG
SH
RG
4
7
5
6
8
13031GE18
R5577SM01
R5577SM02
7-55
2. DISASSEMBLY AND ASSEMBLY OF SWING MOTOR
STRUCTURE
1)
25
2
1
5
10
7
9 11 26 27
13
28
15 12 32 31 17 24
29
4
6
8
3 14
30 16 22
33 34
42
41
21 20
39 40
23
18
35 36 38 37 19
,
,
R5572SF33
1
Body
2 Oil seal
3
Cylinder block
4
Shaft
5
Taper bearing
6
Bushing
7
Shoe plate
8
Spring
9
Set plate
10 Piston shoe assy
11 Ball guide
12 Rear cover
13 Pin
14 O-ring
15 Taper bearing
16 Valve plate
17 Relief valve assy
18 Socket bolt
19 Plug
20 Plug
21 O-ring
22 Shim
23 Plug
24 Back up ring
25 O-ring
26 Friction plate
27 Plate
28 Parking piston
29 O-ring
30 Spring
31 Time delay valve
32 Socket bolt
33 Plug
34 O-ring
35 Valve
36 Spring
37 Plug
38 O-ring
39 O-ring
40 Back up ring
41 Name plate
42 Rivet
7-56
DISASSEMBLY
Removal of relief valv