METHOD FOR CHECKING AND ADJUSTING
• Adjust the track tension to the proper level.
Check the tension by measuring clearance (A) between
the idler and carrier roller shown in the figure. This clear-
ance should be 30 to 40 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.
In addition, whenever jobsite or ground condition is
changed, Komatsu recommend customer to adjust track
tension.
For an inspection and maintenance method, see “METH-
OD FOR CHECKING AND ADJUSTING TRACK TENSION (4-23)”, and perform an inspection and adjust-
ment of track tension..
• Check the idler and rollers for oil leakage and loose bolts and nuts.
Repair abnormality immediately, if any.
• Check clearance (B) between 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 checking method, see “METHOD FOR CHECKING
IDLER CLEARANCE (4-26)”.
METHOD FOR CHECKING AND REPAIRING
METHOD FOR MEASURE LINK PITCH
1.
Put a wooden block, etc. between the track shoe and
sprocket to eliminate the sag of the track.
2.
Measure length (L) of 4 link pitches in a straight portion at
least 2 links apart from master link (A).
1/4 of the measured value is the link pitch.
Standard link pitch (P): 228.85 mm
Turning limit link pitch of bushing: 231.85 mm
The master link has no link window.
MACHINE OPERATIONS AND CONTROLS
OPERATION
3-204
Summary of Contents for D155AX-8E0
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