Komatsu GALEO BR550JG-1, Operation & Maintenance Manual

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MAINTENANCE
SERVICE PROCEDURE
CHECK AND ADJUST TRACK TENSION
WARNING
Let this job be carried out by two workers in pair. One of the two will serve as an operator and the other as a serviceman. The
operator travels the machine at a signal from the serviceman and must be ready to stop it any moment.
Inspection and tightening works of the track shoe assembly are to be carried out with the machine at a raised position. It is
extremely dangerous to let it fall by accident, so never move the machine, while an inspection is going on.
The wear of pins and bushings on the undercarriage will vary with the working conditions and types of soil. It is thus
necessary to continually inspect the track tension so as to maintain the standard tension.
Carry out the check and adjustment under the same conditions as when operating (on jobsites where the track
becomes clogged with mud, measure with the track clogged with mud).
The standard clearance of A between the track frame lower face
and track shoe upper face is 331
±
20 mm (13.0
±
0.8 in).
The measurement method is as explained below.
1. Place a wooden block of 100 mm i3.9 in) in height on the flat
ground. Back the machine up to climb and rest on the block at
the sprocket.
2. Measure the dimension from the track frame bottom surface to
the top of the track shoe at the midpoint between the sprocket
and the third (center) track roller.
If the track tension is not at the standard value, adjust it in the following manner.
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