RE 15326-WA, Version 06.2020, Bosch Rexroth AB
Maintenance and repair |
Hägglunds DUc Drive unit 69/88
9.4
Inspection of hydraulic fluid
CAUTION
Hot hydraulic fluid.
Risk of injury
▶
Use personal protective equipment
NOTICE
Danger associated to Hydraulic fluid.
Risk of environmental damage
▶ Store up used hydraulic fluid and contamined filter elements for destruction.
Different hydraulic fluids are affected differently - consult the manufacturer.
Oil analysis
The purpose to take an oil sample is to check the condition of the oil.
With scheduled oil analysis, wear products can be identified and corrective
action can be taken before failure occurs. Oil analysis can indicate when an oil
change is required, point out shortcomings in maintenance and keep repair cost
to a minimum. Using oil analysis can create a “window of opportunity”, allowing
the user to schedule, overhaul, maintenance or repairs, thus saving money on
equipment repairs and downtime.
The most used method is to take samples in a special bottle and send it to a fluid
laboratory for a analysis to get a report, following a specific international standard.
The analysis should cover viscosity, oxidation, water content, particle counting
possibly including element analysis of particles.
Another method is to install an inline particle counter direct in your hydraulic
system which give you the contamination level according to international
standards. The disadvantage with this method is that you only get the
contamination level in the oil.
