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

MAINTENANCE PROCEDURE

CHECK AND ADJUST TRACK TENSION

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 condition of wear of the undercarriage pins and bushings differs according to the working conditions and type
of soil, so check the track tension regularly and be sure to maintain it at the standard value.
Carry out the inspection and maintenance under the same conditions as normal operations (with mud clogging the
parts normally clogged by 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.
3. The standard tension is clearance A (25 to 30mm (1.0 to
1.2 in)) between the roller contact surface of the track link
and the track roller tread at the 2nd track roller from the
sprocket.
If the track tension is not at the standard value, adjust it in the following manner.
4-30
WARNING
MAINTENANCE