GROUP 5 SWING DEVICE
1. REMOVAL AND INSTALL OF MOTOR
1) REMOVAL
(1) Lower the work equipment to the ground
and stop the engine.
(2) Operate the control levers and pedals
several times to release the remaining
pressure in the hydraulic piping.
(3) Loosen the breather slowly to release the 13031GE18
pressure inside the hydraulic tank.
Escaping fluid under pressure can
penetrate the skin causing serious injury.
ö When pipes and hoses are disconnected, 24
the oil inside the piping will flow out, so
MU
catch it in oil pan.
A
B
(4) Disconnect hose assembly(78, 102, 103).
1
(5) Disconnect pilot line hoses(27, 29, 32).
78
(6) Sling the swing motor assembly(1) and
remove the swing motor mounting bolts 103
102
(24). R35Z77SM44
ö Motor device weight : 39kg(86lb)
(7) Remove the swing motor assembly.
ö When removing the swing motor
assembly, check that all the piping have
been disconnected.
DB
2) INSTALL PB
(1) Carry out installation in the reverse order
to removal. 27
(2) Bleed the air from the swing motor.
29 32
Η Remove the air vent plug.
Θ Pour in hydraulic oil until it overflows from R35Z77SM45
the port.
Ι Tighten plug lightly.
Κ Start the engine, run at low idling and
check oil come out from plug.
Λ Tighten plug fully.
(3) Confirm the hydraulic oil level and check
the hydraulic oil leak or not.
7-47
2. DISASSEMBLY AND ASSEMBLY OF SWING MOTOR
1) STRUCTURE
2-45 2-12 2-14 2-1 2-3 7 2-5 2-13 2-25 2-11 2-3 2-12 2-4 2-2 1-37 1-22 1-21 1-19 1-20 1-18 1-14 1-13 1-11
1-12
2-23 1-10
1-35
1-36
2-24
1-1
2-6
2-46 2-7
1-16
2-22
2-8 1-8
2-6 2-9
2-10 1-4
2-10
2-18
2-15 1-2
2-19
2-16 2-15 1-3
2-7 2-27 1-5
2-41
2-9 2-42 2-21
2-5 2-8 2-4 2-2 2-11 2-13 2-39 2-40 2-26 2-43 2-44 2-20 2-17 2-28 2-16 2-14 2-1 1-23 1-24 1-15 1-17 1-9 1-7 1-6
R35Z72SM12
1 Gear box 1-11 Thrust washer 1-22 Planetary gear 2-5 Cylinder block 2-16 O-ring 2-27 Socket head bolt
1-1 Housing 1-12 Inner race 1-23 Thrust plate 2-6 Collar 2-17 O-ring 2-28 Orifice
1-2 Pinion shaft 1-13 Needle bearing 1-24 Drive gear 2-7 Spring 2-18 Spring seat 2-38 Relief valve assy
1-3 Plate 1-14 Planetary gear B 1-35 Plug 2-8 Washer 2-19 Spring 2-39 Check valve
1-4 Collar 1-15 Thrust plate 1-36 O-ring 2-9 Snap ring 2-20 O-ring 2-40 Spring
1-5 Tapper roller bearing 1-16 Screw 1-37 O-ring 2-10 Pin 2-21 Cover 2-41 Plug
1-6 Oil seal 1-17 Sun gear B 2 Axial motor piston 2-11 Retainer holder 2-22 Ball bearing 2-42 O-ring
1-7 Tapper roller bearing 1-18 Holder 2-1 Case 2-12 Retainer plate 2-23 Pin 2-43 Plug
1-8 Plate 1-19 Thrust washer 2-2 Ball bearing 2-13 Piston assy 2-24 Valve plate 2-44 O-ring
1-9 Collar 1-20 Inner race 2-3 Shaft 2-14 Disc 2-25 Pin 2-45 Plug
1-10 Holder 1-21 Needle bearing 2-4 Thrust plate 2-15 Brake piston 2-26 O-ring 2-46 O-ring
7-48
2) DISASSEMBLY
Disassemble the parts by the following
procedure.
(1) Separating the motor and the reduction 3
gear
Secure the motor assembly in a vice and
remove the socket head bolt (3).
R35Z77SM01
(2) Disassembling the motor
Η Secure the motor assembly in a vice. 2-21
Remove the socket head bolts (2-27) and 2-27
separate the cover (2-21).
ö When separating the cover (2-21), be
careful not to drop the valve plate (2-24).
R35Z77SM02
Θ Remove the valve plate (2-24) and the
pin (2-23).
2-24
ö The valve plate (2-24) may remain on the
motor side. 2-23
R35Z77SM03
Ι Remove the bearing (2-22). Remove the
O-ring (2-26).
2-22
2-25
2-26
2-21
R35Z77SM04
7-49
Κ Disassemble the check valve.
a. Loosen to remove the plug (2-41).
2-41
R35Z77SM05
b. Remove the spring (2-40) and the
check valve (2-39).
2-39
2-40
R35Z77SM06
Λ Remove the relief valve.
a. Loosen the plug (2-38-6) to remove the
relief valve assembly (2-38).
ö Do not move the adjuster kit (2-38-7).
Otherwise, the set pressure will change.
ö Do not disassemble the relief valve 2-38-6
assembly (2-38) because it is a
functional component. 2-38
2-38-7 R35Z77SM07
Μ Remove the disc spring assembly (2-19)
and the spring seat (2-18), and utilizing 2-18
2-19
the gage port of the case (2-1), remove 2-18
the parking brake piston (2-15).
2-15
ö The piston may be ejected by the air
pressure. Exercise sufficient care during
removal. At the beginning of the work, set
a lower air pressure and adjust it while
checking the piston for ejection. R35Z77SM08
7-50
Ν Remove the cylinder block and other
associated parts.
2-5
(2-5) Cylinder block
(2-6) Collar
(2-7) Spring
(2-8) Washer
(2-9) Snap ring
(2-10) Pin
(2-11) Retainer holder
R35Z77SM09
(2-12) Retainer plate
(2-13) Piston assembly
(2-14) Disc(Parking brake spec. only)
Ξ Remove the retainer plate (2-12) and the
piston assembly (2-13).
2-12
2-13
R35Z77SM10
Ο Remove the pin (2-10) and the retainer
holder (2-11).
2-10
2-11
R35Z77SM11
Π While pushing the washer (2-8), remove
the snap ring (2-9). 2-9
Ρ Remove the collar (2-6), the spring (2-7) 2-8
and the washer (2-8). 2-7
2-6
R35Z77SM12
7-51
Remove the thrust plate (2-4).
2-4
R35Z77SM13
Σ Lightly strike the end of the shaft (2-3)
2-3
with a plastic hammer to remove the
shaft.
2-2
R35Z77SM14
Τ Disassemble the bearing (2-2) and the
ball bearing (2-3).
ö The disassembled bearing must not be 2-3
used.
2-2
R35Z77SM15
(3) Disassembling the reduction gear
Η Remove the following parts.
(1-37) O-ring 1-23
(1-23) Thrust plate
1-20
(1-24) Drive gear 1-21 1-24
(1-22) Planetary gear 1-22
(1-21) Needle bearing 1-19
1-18
(1-20) Inner race
(1-19) Thrust washer
1-37
(1-18) Holder
R35Z77SM20
7-52
Θ Remove the sun gear (1-17).
1-17
R35Z77SM21
Ι Remove the holder (1-11) and other
associated parts.
1-10
R35Z77SM22
¤Œ Secure the holder (1-11) in a vice and 1-16
loosen the screw (1-16) to remove the
thrust plate (1-15). 1-15
ö The screw is hard to remove because
loctite was used during assembly. To 1-12
facilitate the removal of the screw, warm 1-13
the screw with a drier. 1-14
Λ Remove the following parts. 1-10
1-11
R35Z77SM23
(1-14) Planetary gear
(1-13) Needle bearing
(1-12) Inner race
ö When replacing the taper roller bearings 1-8
(1-6) and (1-8), the collar (1-3) and the
1-9
plate (1-4), they are to be replaced by the
body assembly.
Μ Remove the following parts.
(1-9) Plate
(1-10) Collar
R35Z77SM24
7-53
Ν Remove the pinion shaft (1-2)
ö When removing the shaft, be careful not
to drop it. If it is hard to remove, lightly 1-1
strike it with a plastic hammer.
1-2
R35Z77SM25
Ξ Remove the inner race of the taper roller
bearing (1-7). 1-7
R35Z77SM26
Ο Break the oil seal (1-6) to remove it.
ö The removed oil seal must not be used 1-6
again.
When removing it, exercise care to
prevent damage to the outer races of the
taper roller bearing (1-8) and (1-6).
R35Z77SM27
Π Remove the outer race of the taper roller
bearing (1-8) and the plug (1-35). 1-7
1-35
R35Z77SM28
7-54
3) ASSEMBLY
Assemble the parts by the following
procedure.
(1) Assembling the motor
Η Install the relief valve assembly (2-38).
ÂTightening torque : 157Ü10 NÂm
161Ü1 kgfÂm
2-38
R35Z77SM30
Θ Assemble the check valve (2-39) and the
spring (2-40).
2-39
2-40
R35Z77SM31
Ι Install the plug (2-41).
ÂTightening torque : 39.2Ü2.0 NÂm
4.0Ü0.2 kgfÂm
2-41
R35Z77SM32
Κ Assemble the collar (2-6), the spring (2-
7) and the washer (2-8) in the cylinder 2-8
block (2-5). 2-7
ö Be sure to assemble the collar (2-6) in 2-6
the correct direction.
Tapered side 2-6
Cylinder block
R35Z77SM33
7-55
Λ While pushing the washer (2-8),
assemble the snap ring (2-9).
2-9
2-8
R35Z77SM35
Μ Apply grease to the pin (2-10) and
assemble it in the cylinder block (2-5).
Ν Assemble the retainer holder (2-11).
2-10
2-11
R35Z77SM11
Ξ Set the piston assembly (2-13) on the
retainer plate (2-12) and assemble it in
the cylinder block (2-5).
ö Apply an ample amount of hydraulic fluid
to the sliding part before assembly.
2-12
2-13
R35Z77SM10
Ο Press-fit the ball bearing (2-2) on the
shaft (2-3).
2-3
ö Press-fit the ball bearing (2-2) with the
attached snap ring facing as shown in
the figure.
2-2
Snap ring
R35Z77SM36
7-56
Π Press-fit the shaft (2-3) and the ball
2-3
bearing (2-2) in the case (2-1).
2-2
R35Z77SM14
Ρ Apply grease to the back side of the
thrust plate (2-4) and assemble it. 2-4
ö The thrust plate must be assembled in
the correct direction.
R35Z77SM13
Assemble the cylinder block (2-5) and
other associated parts.
2-5
ö During assembly, be sure that the pin (2-
10) will not come out.
ö The disk(2-14) is assembled only for the
parking brake spec only.
R35Z77SM09
Σ Apply grease to the O-ring (2-16) and the
O-ring (2-17) and assemble them on the
brake piston (2-15).
Τ While paying attention to the location of 2-15
the hole of the pin (2-25), assemble the
2-17
brake piston (2-15) in the case (2-1).
2-16
R35Z77SM37
7-57
Υ Assemble the spring seat (2-19) and the
disc spring assembly (2-18) in the correct 2-18
2-19
direction. 2-18
2-15
2-18
2-19
2-18
R35Z77SM08
§ Apply grease to the O-ring (2-20) and
assemble it in the case (2-1). 2-20
Check to see if the pin (2-25) can be
assembled in the brake piston and case 2-25
hole. If not, remove the brake piston (2-
15) and re-orient it, then reassemble.
ö Assemble the pin (2-25) while being
attached on the cover.
R35Z77SM39
§æ Apply grease to the O-ring (2-26) and the
pin (2-25), then assemble them in the
2-22
cover (2-21). 2-25
2-26
Press-fit the ball bearing (2-22).
2-21
R35Z77SM04
§ Install the pin (2-23), then install the valve
plate (2-24).
To prevent it from falling, apply grease to 2-24
the back side. 2-23
R35Z77SM03
7-58
§ While paying attention to the location of
the pin (2-25), install the cover (2-21) and 2-21
other associated parts to the case (2-1).
2-27
ö Exercise care so that the pin (2-25) and
the valve plate (2-24) will not fall.
§ Loosely tighten the socket head bolts (2-
27), then using a torque wrench, tighten
them to the specified torque.
R35Z77SM02
ÂTightening torque : 13Ü0.7 kgfÂm
(94.4Ü5 lbfÂft)
(2) Assembling the reduction gear
1-6
Η Press-fit the oil seal (1-7).
ö Prior to press-fit, apply grease to the oil
seal mounting area of the housing and
the periphery of the oil seal.
R35Z77SM27
Θ Press-fit the taper roller bearing (1-8) and
install the plug (1-35). 1-7
1-35
R35Z77SM28
Ι Apply grease to the inner race of the
taper roller bearing (1-6) assembled on 1-7
the pinion shaft (1-2).
1-2
R35Z77SM41
7-59
Κ Install the pinion shaft (1-2) and other
associated parts. Install the taper roller
bearing inner race (1-7).
1-1
ö Prior to assembling the pinion shaft (1-2),
etc. apply grease to the lip of the oil seal
(1-6).
1-2
R35Z77SM25
Λ Install the collar (1-9) and the plate (1-8).
1-8
1-9
R35Z77SM24
Μ Install the following parts on the holder
1-16
(1-10).
(1-11) Thrust washer 1-15
(1-12) Inner race
(1-13) Needle bearing 1-12
(1-14) Planetary gear B 1-13
(1-15) Thrust plate
1-14
(1-16) Screw 1-10
1-11
ö Apply loctite 242 to the screw prior to R35Z77SM23
tightening it.
ÂTightening torque : 0.4Ü0.05 kgfÂm
2.9Ü0.3 lbfÂft
Ξ Install the holder (1-10) and other
associated parts.
1-10
R35Z77SM22
7-60
Ο Install the sun gear (1-17).
ö Install the sun gear (1-17) with the snap
ring facing as shown in the figure. 1-17
R35Z77SM21
Π Install the holder (1-18).
1-18
R35Z77SM42
Ρ Install the following parts.
(1-19) Thrust washer 1-23
(1-20) Inner race 1-20
(1-21) Needle bearing 1-21 1-24
(1-22) Planetary gear A 1-22
1-19
(1-23) Thrust plate 1-18
(1-24) Drive gear
(1-37) O-ring
1-37
R35Z77SM20
ö Selection for thrust plate (15).
When any consisting parts of reduction
unit were changed, select and install
thrust plate corresponding to the E
measured value "E" referring to the
below table.
E dimension Less than More than
(measured value) 6.6 6.6~7.2
7.2
Part no. of thrust
plate 1-23 XJBV-00129 XJBV-00130 XJBV-00131 R35Z77SM43
(plate thickness) (3.2 mm) (2.8 mm) (2.3 mm)
7-61
(3) Assembling the whole motor assembly
Place the reduction gear assembly on the
motor assembly and loosely tighten the
socket head bolt (3), then tighten it to the 3
specified torque.
ÂTightening torque : 13Ü0.7 kgfÂm
(94.4Ü5 lbfÂft)
R35Z77SM01
7-62
