Checking The Rubber Track Tension - Komatsu PC27R-8 Operation & Maintenance Manual

MAINTENANCE PLAN
4.7.1.f

CHECKING THE RUBBER TRACK TENSION

DANGER
This operation must be carried out by two persons. One operator must sit in the cab and move the ma-
chine according to the signals of the operator who carries out the check and the adjustment.
The shoe tension must be checked with the frame lifted from the ground. Do not operate any control le-
ver while the operator is carrying out the check.
CHECK (for PC20R only)
Stop the machine on a firm and level surface.
1 - Position the joint of the rubber track marked with M on the
upper part of the track, mid-way between the two axes.
2 - Lower the equipment to the ground and lift each track by
means of boom and arm.
When carrying out this operation, move the control levers
slowly.
3 - Measure the distance between the track and the second roll-
er, starting from the sprocket.
If the distance is included between 10 and 15 mm, the ten-
sion is normal.
If the clearance exceeds the standard value, adjust the ten-
sion and restore the correct value.
CHECK (for PC27R only)
Stop the machine on a firm and level surface.
1 - Position the joint of the rubber track marked with M on the
upper part of the track, mid-way between the two axes.
2 - Lower the equipment to the ground and lift each track by
means of boom and arm.
When carrying out this operation, move the control levers
slowly.
3 - Measure the distance between the track and the third roller,
starting from the sprocket.
If the distance is included between 10 and 15 mm, the ten-
sion is normal.
If the clearance exceeds the standard value, adjust the ten-
sion and restore the correct value.
IMPORTANT
If the machine is operated with loose rubber tracks, the
shoes may come off their seats and consequently off the
track, or the steel reinforcement units may wear too
quickly.
142
M
10 15 mm
RWA09330
RWA06380
RWA09340