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OPERATION
•
On slopes, do not work across the slope surface but work
upward or downward. When stopping the machine on a
slope, direct it up or down.
•
If the ground slants to the right or left while the machine is
digging, do not stay there but move back to a level place,
then start digging again.
•
If the idler or sprocket floats because of a hard obstacle
during dozing or ripping work, avoid that obstacle, since it
is "difficult to move it".
METHOD FOR CHECKING AND ADJUSTING
•
Adjust the track tension to a proper level.
Check the tension by measuring clearance (A) between
the idler and carrier roller shown in the figure. This clear-
ance should be 20 to 30 mm usually. However, tense a lit-
tle higher for rocky terrain and a little lower for clay land.
Extremely low track tension can cause abnormal vibration
or abnormal wear of sprocket teeth.
For the testing and adjusting method, see "METHOD FOR
CHECKING AND ADJUSTING TRACK TENSION (4-21)".
•
Check the idler and rollers for oil leakage and loose bolts
and nuts.
Repair any abnormality immediately.
•
Check a clearance (B) between front idler guide plate (1)
and track frame (2).
As clearance (B) becomes larger, it can cause the front id-
ler to sway sideways and cause the track shoe to jump off
rollers.
For the testing and adjusting method, see "METHOD FOR
ADJUSTING IDLER CLEARANCE (4-24)".
METHOD FOR CHECKING AND REPAIRING
Frequent inspection and prompt repair will reduce repair costs.
The following items for inspection will serve as a guide to maintenance service of each undercarriage part. Per-
form periodical inspection and contact the Komatsu distributor in your area when machine has approached re-
pairable limits and reversing limits.
METHOD FOR MEASURE LINK PITCH
1.
Put a wooden block, etc. between the track shoe and
sprocket to eliminate the sag of the track.
MACHINE OPERATIONS AND CONTROLS
3-187
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