TM 5-3805-280-24-2
Mechanical Drive Elements
CAUTION: The approximate weight of
undercarriage without tracks is 4717 kg (10,400
lb).
Undercarriage Without Tracks--Specification
Weight..................................................... 4717 kg (10,400 lb) approximate
17. Put an 18-t (20-ton) service jack under each end of
undercarriage. Use hardwood blocks is necessary.
18. Remove cap screws (B) from swing bearing (A).
A--Swing Bearing
19. Slowly lower undercarriage onto track chain.
B--Cap Screw (31 used)
20. Lift sprocket end of undercarriage so sprocket clears
track chain.
21. Pull undercarriage out from under the upperstructure.
22. Remove swing bearing. (See procedure in this group.)
TX,43,UU3743
1923SEP988/8
INSTALL UPPERSTRUCTURE
1. Push undercarriage under upperstructure.
2. Install DFT1144 Guide Pins to help align holes in
swing bearing (A) with holes in main frame. (See
Section 99 for instructions to make tool.)
3. Raise undercarriage into position using two 18-t
(20-ton) service jacks. It may be necessary to turn
swing bearing inner race to align teeth on swing motor
pinion shaft.
A--Swing Bearing
4. Install cap screws (B). Tighten cap screws.
B--Cap Screw (31 used)
Swing Bearing-to-Upperstructure Cap Screw--Specification
Torque ......................................................................... 640 Nm (470 lb-ft)
If all cap screws are not accessible, tighten them after the
machine has been lowered and supports have been
43
removed.
4350
25
Continued on next page
TX,43,UU3744
1923SEP981/4
22-24
