Komatsu PC400LC-5 Operation & Maintenance Manual page 178

24. SERVICE PROCEDURE
24.2.4 CHECK AND ADJUST TRACK TENSION
A
WARNING
Carry out this operation with two workers. The operator must
move the machine in accordance with the signals from the other
worker. The track tension is checked with the chassis raised, so
it is extremely dangerous if the machine is lowered by mistake
during the inspection. Never move the machine while anyone is
carrying out measurements.
The wear of pins and bushings on the undercarriage will vary
with the working conditions and soil properties. It is thus necessary
to continually inspect the track tension so as to maintain the stand-
ard tension.
Carry out the check and adjustment under the same conditions
as when operating (on job sites where the track becomes clogged
with mud, measure with the track clogged with mud).
Inspection
1. Raise the chassis with the boom and arm.
When doing this, operate the levers slowly.
2. Measure the clearance between the bottom of the track frame
and the top of the track shoe at a position that is safe even if
the chassis should come down.
Standard clearance: 358 2 20 mm (14.1 + 0.8 in.)
Places to measure:
PC400-5, 5 MIGHTY: 4th track roller from sprocket
PCIOOLC-5, 5 MIGHTY: Between 4th and 5th track roller from sprocket
PCIOOHD-5: 8th track roller from sprocket
I I
,Trackframe
yTrack shoe x,_,,
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