Husqvarna DXR250 Operator's Manual page 62

Leakage
NOTICE! Leakage can cause serious mechanical
breakdowns and an increased risk of slipping. Wash the
machine regularly to increase the chance of detecting
leakage at an early stage. Deal with leaks as quickly as
possible and refill if necessary.
Hydraulic fluid
Leakage of hydraulic fluid leads to an increased risk of dirt
getting into the hydraulic system which can lead to
breakdowns and mechanical damage. If you detect
hydraulic fluid underneath the machine or on the base
plate it is probably due to leakage.
Check for leakage at the hose connectors, couplings and
cylinders. Leakage can also occur at other hydraulic
components and can manifest itself with a strip of dirt.
Cracks
General
A clean machine makes it easier to detect cracks.
The greatest risk of crack formation is:
• At weld seams
• At holes or sharp corners
Lower part
First check if there are any cracks around the outrigger
mounting/dozer blade mounting both on the
undercarriage and on the outriggers/dozer blades, gear
rings fitting and welded joints between the machine body
and the side of the track.
Arm system
Check in particular whether cracks have appeared on the
arm system's joints, cylinder mountings and weld seams.
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.
62 – English
MAINTENANCE AND SERVICE
Components that should not be welded
The following components should not be repaired but
replaced:
• Tool attachment
• Link
• Cotters
• Mounting plate
• Cylinders
• Hydraulic tank
• Cast parts
Recommended welding wire
Type Recommended wire
Esab OK 14.03 Tubrod Class: AWS
Flex cored wire
A5.28 E110C-G
Elgamatic 100 Class: AWS A5.18
Solid
ER70S-6
Esab OK 75.75 Class: AWS A5.5
Rod
E11018-G
Functional inspection
General
Functional inspections must ensure that the machine's
functions are intact.
WARNING! Exercise great caution during
!
the inspection to ensure that nobody is
injured.
Brake functions
Check the drive brake's function by operating the machine
on a slope. Release the joysticks. The machine should
then break 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.
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