Check And Adjust Track Tension - Komatsu PC15MRX-1 Operation And Maintenance Manual

MAINTENANCE PROCEDURE

CHECK AND ADJUST TRACK TENSION

(Machine equipped with rubber shoe)
The track tension is checked with the machine raised, so it is extremely dangerous if the machine
comes down by mistake during the inspection. Stop the engine and set the safety lock lever to the
LOCK position to prevent the machine from moving. Never put any part of your body under the track
or track frame while measuring, and be extremely careful when taking the measurements.
For details of starting the engine and operating the work equipment, see "BEFORE STARTING
ENGINE (PAGE 3-21)", "STARTING ENGINE (PAGE 3-31)", "AFTER STARTING ENGINE (PAGE 3-34)",
and "WORK EQUIPMENT CONTROLS AND OPERATIONS (PAGE 3-45)" in the OPERATION section.
The wear of the rubber shoe will vary according to the working conditions and type of soil. Therefore, it is neces-
sary to inspect the wear and track tension frequently.
In particular, after fitting new parts, be sure to carry out the first inspection after 30 hours of use.
Checking
1. Move the machine to set the connection (M mark) of the
rubber shoe at the top at a point midway between the
sprocket and idler.
2. Raise the chassis with the boom and arm.
When doing this, operate the levers slowly.
3. The standard clearance is 10 to 15mm (0.40 to 0.60 in)
between the shoulder of the rubber shoe and the tread
surface of the 2nd track roller from the sprocket.
If the track tension is not at the standard value, adjust it in
the following manner.
If operations are carried out with the rubber shoe loose
(when the clearance for the track tension is more than 20
mm(0.8 in)), it will cause the track to come off, and this
will lead to premature wear of the core.
4-34
WARNING
MAINTENANCE