DOC-20230111-WA0038.

UNDERCARRIAGE / Travel Device
Disassemble Travel Device
• Be sure to read “Precautions for Disassembly and
Assembly” thoroughly on page W1-1-1 before
starting the disassembly work.
6. Remove nut (9) from travel motor (1) using
special tool (ST 4128).
CAUTION: High pressure may remain in the
travel device. After gradually loosening the
air vent plug to release any remaining
pressure thoroughly, remove the drain plug
to drain the gear oil. If the air vent plug is
quickly loosened, the plug may fly off or the
gear oil may spout out. Keep the body (parts)
and the face away from the plug.
1. Remove plug (33) (3 used) from cover (32). Drain
the gear oil from the travel device.
: 10 mm
2. Remove ring (34) from ring gear (28) with a screw
driver. Remove cover (32) from the ring gear.
3. Remove the first stage carrier (20) assembly and
shaft (27) from ring gear (28).
4. Remove sun gear (17) and the second stage
carrier (11) assembly from ring gear (28).
5. Remove socket bolts (29) (16 used) to remove
ring gear (28) from drum (5).
: 10 mm
ST 4128
W152-03-02-005
CAUTION: Sprocket (6) weight: 24 kg
(53 lb)
IMPORTANT: As for handling the nylon sling, refer
to “the Precautions for Handling
Nylon Sling” on page W1-1-5.
7. Remove bolts (8) (12 used) from sprocket (6).
Attach a nylon sling on the sprocket. By crane,
remove sprocket (6) from drum (5).
: 24 mm
CAUTION: Drum (5) weight: 29 kg (64 lb)
8. Install eye bolts (M12, pitch 1.75) to the socket
bolt (29) holes on drum (5). By crane, remove the
drum from travel motor (1).
1
9. Place drum (5) with ring gear (28) side facing
downward.
IMPORTANT: Do not remove bearing (4) remaining
in the travel motor unless necessary.
10. Remove the outer race of bearing (7) from drum
(5) with a bar.
W3-2-5