Husqvarna DXR250 Operator's Manual page 63

Tool attachment
WARNING! The tool attachment's cotter
!
and pin are important safety
components. A worn or damaged cotter
must be replaced with an original spare
part, manufacturing your own cotters is
not permitted.
• Check that the tool attachment is complete and that all
parts are intact and correctly mounted.
Track tension
Checking automatic track tension
Correct track tensioning is important for the service life of
the track and the track tensioning.
• Lower the outriggers/dozer blades. Let the machine
rest on its outriggers/dozer blades.
• Remove the inspection door. (DXR270, DXR300,
DXR310)
• Pull out the valve and rotate it a quarter turn to lock it
in open position.
• Slide the tensioning wheel towards the center.
• Rotate and release the valve back into position.
Automatic track tensioning can be done in two different
ways.
1 In the service menu under the tab "Track tension" the
tracks can be tensioned automatically. Hold the
selection key down to activate the track tension.
2 The caterpillar tracks are tensioned automatically
when the outriggers/dozer blades are raised.
Should demolition material or suchlike enter into the side
of the tracks during operation, their spring function should
prevent breakdowns and stoppages. The spring function
consists of a hydraulic accumulator.
• If the tracks become slack it can be due to one of the
track tensioning function's non-return valves being
blocked or broken.
• If the belts do not spring, the hydraulic accumulator
may be defective.
MAINTENANCE AND SERVICE
Cleaning non-return valves
• The non-return valves can be cleaned by discharging
the pressure in the accumulator and thus loosening
the tension of the tracks.
• Pull out the valve and rotate it a quarter turn to lock it
in open position.
• Raise and lower the outriggers/dozer blades.
Hydraulic fluid is then pumped around and cleans the
non-return valve.
• Turn and release the valve. Raise and lower the
outriggers/dozer blades to tension the track.
Hammer lubrication
CAUTION! Exercise great caution during
!
the inspection to ensure that nobody is
injured.
• Make sure grease is reaching the hammer by
detaching the lubrication hose from the hammer.
Uncouple the tool hoses. Start the machine and
activate the hammer function.
Tools
• Check that the tool can be used in such a way that
neither the operator nor people in the vicinity are
exposed to unnecessary risks. Refer to the supplier's
Operator's Manual for other checks.
–
English 63