Doosan DX700LC Operation And Maintenance Manual page 285

Track Frame Extension and Retraction
Be sure to clean all off all dirt and mud from tread surface of
center frame, and on side frames; otherwise, it may cause
bolts to loosen.
Operate machine with side frames retracted only when
loading and unloading machine, or during driving for
loading and unloading.
Do not retract side frames for excavating or during normal
driving and operation. If machine is operated with either
side frame retracted, or even one side frame retracted,
during operation, cabin/machine will become unstable. This
can cause damage to, center frame, side frames, bolts, etc.
There are only six bolts holding side frame at each location
instead of nine.
Operation with side frame retracted could even result in a
tip over, serious injury and death.
Track Width Adjustment
The DX700LC has a variable track width device that allows
tracks to be retracted 300 mm on each side of machine.
The retraction device should only be used during transportation.
During machine operation at a work site, track width device
should be adjusted to have widest track width. If not, stability of
machine will be greatly reduced, which could result in fatal
accidents and damage.
Frame Retraction
1. Remove ten bolts, harden washers and spacers (1, Figure
157) from side frame (2) to be retracted.
NOTE:
Do not loosen two bolts (3, Figure 157) on guide
(4).
NOTE: Repeat procedure at other center frame support
(5, Figure 157).
Reference
Number
1
2
3
4
5
Transportation
CAUTION
Description
Bolt
Side Frame
Bolt
Guide
Center Frame Support
1
4
Figure 157
2
5
3
FG016362
OP001124
5-3