Track unit, checking tension
Check the track tension every 50 hours.
WARNING
Risk of crushing.
Raised equipment may drop if the hydraulic system
fails or if the control is operated. Falling equipment
may cause serious injury or death.
Always make sure that raised equipment is
supported by a mechanical device before walking
or working under it.
NOTE!
To check the track tension, the track must be raised
off the ground.
When two persons are working, the operator should
follow the sign of the maintenance worker.
The degree of wear condition of track link pins and
bushings varies with the working condition or the
characteristics of soil. Check the track tension often
and keep it to the specified value.
When working in wet sand or clay, it sticks to and
packs between moving undercarriage components.
This can prevent mating parts from properly
engaging each other, which cause interference and
high loads. Due to abrasive particles in the material
it significantly accelerates wear rates of the
sprockets, pins / bushings, idlers and track links as
the track load and tension increase. Generally,
packing effects cannot be controlled except by
constant cleaning or removal of the material.
Therefore thoroughly clean the undercarriage at
least daily or more often according to soil conditions
in job-site.
When working in stony or rocky ground, the track
tension should be adjusted tightly because the tight
tension helps to make contact and matching of
undercarriage components engaged each other. A
loose track is one of the main causes of improper
engaging of undercarriage components, which may
result in following failures; wear of the track link/
roller, loosening of the shoe screw, creeping/
shifting of the track link pin and crack of the track
link. Contact your Volvo dealer for detailed
information.
Maintenance
Maintenance service, every 50 hours
301
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