Husqvarna DXR300, Operator'S Manual

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44 –
English
MAINTENANCE AND SERVICE
Leakage
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
Check in particular whether cracks have appeared around
outrigger mountings both on the lower part and on the
outriggers, gear ring mounting and weld seams between the
machine body and the track sides.
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.
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
Functional inspection
General
Functional inspections must ensure that the machine’s
functions are intact.
Brake functions
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.
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
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.
!
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.
Type Recommended wire
Flex cored
wire Esab OK 14.03 Tubrod Class: AWS A5.28
E110C-G
Solid Elgamatic 100 Class: AWS A5.18 ER70S-6
Rod Esab OK 75.75 Class: AWS A5.5 E11018-G
!
WARNING! Exercise great caution during the
inspection to ensure that nobody is injured.