Husqvarna DXR140 Operator's Manual page 46

Welding work on the machine
Only qualified welders should carry out welding
operations on the machine.
WARNING! Risk of fire. The machine
!
contains flammable liquids and
components. Do not undertake any
welding in direct connection with
flammable liquids, e.g. in the vicinity of
tanks, fuel lines or hydraulic pipes.
Ensure that there is a fire-extinguisher
on site at the workplace.
Risk of inhaling harmful substances.
Toxic gases can be formed. When
welding indoors, use equipment to
extract welding fumes. Never weld in the
vicinity of rubber or plastic material. Use
a breathing mask.
Components that should not be welded
The following components should not be repaired but
replaced:
• Tool attachment
• Cotters
• Mounting plate
• Cylinders
• Hydraulic tank
• Cast parts
Recommended welding wire
Type Recommended wire
Flex cored Esab OK 14.03 Tubrod Class: AWS A5.28
wire E110C-G
Elgamatic 100 Class: AWS A5.18 ER70S-
Solid
6
Esab OK 75.75 Class: AWS A5.5 E11018-
Rod
G
Functional inspection
General
Functional inspections must ensure that the machine's
functions are intact.
Brake functions
WARNING! Exercise great caution during
!
the inspection to ensure that nobody is
injured.
Check the drive brake's function by operating the machine
on a slope. Release the joysticks. The machine should
then be braked and remain stationary.
Check the slew brake's function by rotating the arm on a
slope. Release the joysticks. The arm should then be
braked and stop gently.
46 – English
MAINTENANCE AND SERVICE
Cooler
Overheating has a negative effect on the service life of the
machine's components. Clean the cooler when
necessary. Refer to "Cleaning the machine" in the
"Maintenance and service" section.
Cylinders
Checking cylinder tubes and piston rods must be done
with the cylinders extended to the end position. Replace
damaged components immediately.
Check that the cylinder tubes are not dented or cracked.
Check that the piston rods are undamaged and straight. A
damaged piston rod causes contamination in the
hydraulic system, resulting in mechanical damage.
Check the scraper
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.
• Extend the outriggers. Let the machine rest on its
outriggers.
• Remove the inspection door.
• 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. Refit
the inspection door.
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 are up. Operate the outriggers up
and then down. Wait 15 minutes and then check.
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.