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5.3 DISASSEMBLY AND ASSEMBLY OF SWING
REDUCTION UNIT
5.3.1 TOOLS AND JIGS
(Tools
NAME, REMARKS
Allen wrench Opposing flats 6,10mm
Socket wrench
Adjust wrench
Double ended wrench
Hammer
Plastic mallet
Screwdriver
‘Torque wrench
Liquid packing ‘Three-Bond #1104B
Oil container for
shrinkage fit work
80~100T (176~212"F)
@ digs 2) Roller bearing (401) removing jig
1) Oil seal fitting jig
993(3.66°)
125 (492°)
9 (0.35)
8) Roller bearing (402) fitting jig
ae 65")
138 (5.43°)
742.917)
9140 (5.517
I-5-15 5.3.2 DISASSEMBLY PROCEDURE
(2) Remove swing motor unit and drain oil
Remove the swing motor unit from the
machine, loosen plug (902) at the oil outlet,
discharge the gear oil and place the unit on a
work bench.
© Receive gear cil in a clean container
and inspect for the presence of worn
particles.
(2) Remove hydraulic motor
Loosen socket bolts (602) and remove the
hydraulic motor.
$7 10mm
(8) Remove No.1 sun gear (211)
(4) Remove No.1 carrier assy
Remove the No.1 carrier assy with the No.1
planetary gear (210) and others,
(@) Disassembly No.1 carrier assy
© Put a matching mark on each of the
planetary gears and pins so
combination and pairing do not
change.
1) Remove snap ring (911). Then remove side
plate (287) at the top.
2) Remove No.1 planetary gear (210) and needle
bearing (408).
15-16
403 210
Fig. 5-44 Removing needle bearing 3) Remove side plate (285) under the planetary
gear.
4) After removing three No.1 planetary gears
(210), remove thrust washer (286) in the
center.
© Do not remove No.1 pin (283) from
No.1 carrier (231) unless there is
anything wrong.
If the No.1 pin is removed, you need
a special caulking tool at reassembly.
the 22 are)
(OIL HOLE}
However, make sure that
20.079") oil hole of No.1 pin (283)
is directed outwards with respect to
the center of No.1 carrier (231).
(Refer to Fig.5-46 below.)
@ Remove No.2 sun gear (204)
(2) Remove No.2 carrier assy
Fig. 5-48 Removing No.2 carrier assy
1-8-17 (8) Disassembly No.2 carrier assy
© Do not disassemble the No.2 carrier
assy further unless there is anything
wrong. In this condition, inspect the
parts according to the inspection
procedure specified under 5.4.2 (1)
As mentioned above, it is
recommended that the No.2 carrier
assy be replaced as a pair, but in case
part of it must be replaced for an
unavoidable reason, do it as below:
1) Push spring pin (910) in further and draw out
No.2 pin (282).
© Do not reuse the removed No.2 pin.
2) Draw out No.2 planetary gear (203) and side
plate (285) sideways
‘Remove ring gear (202)
‘The bottom of the two holes is provided with
M12 screw threads to draw out the ring gear.
Utilise motor mounting socket bolts (602) to
draw it out.
7 10mm
(10) Separate snap ring (913) from drive shaft
201).
Fig. 5-51 Removing snap ring
