General Description; Track Tension - Doosan DX140R Shop Manual

GENERAL DESCRIPTION

The track assembly is composed of the following major
components:
1. Track
2. Front Idler Roller
3. Upper Roller
4. Lower Roller
5. Track Spring and Track Adjustment Cylinder

TRACK TENSION

Safely measuring track tension requires two people. One
person must be in the operator's seat, running the controls
to keep one side frame in the air, while the other person
makes dimensional checks. Take all necessary precautions
to make sure the machine won't move or shift position
during service. Warm up the engine to prevent stalls, travel
the excavator to an area that provides level, uniform ground
support and/or use support blocks when necessary.
The track adjusting mechanism is under very high-
pressure. NEVER release pressure too suddenly. The
grease cylinder valve should never be backed off more than
1 complete turn from the fully tightened down position.
Bleed off pressure slowly and keep your body away from
the valve at all times.
Track shoe link pins and bushings wear with normal usage,
reducing track tension. Periodic adjustment is necessary to
compensate for wear and it may also be required by working
conditions.
1. Track tension is checked by jacking up one side of the
excavator. See Figure 1. Place blocking under frame while
taking measurement.
Track Assembly
Page 6
WARNING
Figure 1
FG000345
SP001941