TIPS FOR LONGER UNDERCARRIAGE LIFE
Undercarriage life greatly varies depending on operation method, inspection and maintenance.
For most ef
ficient operation, keep the following points in mind.
OPERATION METHOD
• Use a track shoe suitable for soil condition.
For selection of the shoe, consult your Komatsu distributor.
• Do not let the shoe slip during operation.
If the shoe starts slipping, decrease the load to prevent slipping.
• Avoid rapid start, acceleration, stop, or unnecessary high-speed operation or sharp turn.
• Drive the machine as straight as possible. Do not turn only in either direction but turn in both directions
evenly. Also, secure turning radius as large as possible.
• Clear the travel ground and remove obstacles so that the machine does not ride over large boulders or ob-
stacles.
• 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 {0.8 to 1.2 in} usually. How-
ever, tense a little 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”.
• 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
CHECKING AND ADJUSTING IDLER CLEARANCE”.
OPERATION MACHINE OPERATIONS AND CONTROLS
3-221
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