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Installation and Maintenance Manual, Compact CA
All hydraulic fluids are affected
differently. Obtain the advice of
your oil supplier or by Hägglunds
representative.
Contamination of the oil by water can be
detected by sampling from the bottom of the
tank. Most hydraulic oils repel the water, which
then collects at the bottom of the tank. This
water must be drained off at regular intervals.
Certain types of transmission oils and engine
oils emulsify the water; this can be detected
by coatings on filter cartridges or a change in
the colour of the oil. Obtain the advice of your
oil supplier in such cases.
Water content
Maintenance
4.5 Oil inspection
Purpose
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 re-fittings or overhauls,
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 an analysis and from the laboratory you get
a report, which follow a specific international
standard.
You have to select what analysis the laboratory
should take, but the most used analysis are particle
count, water content, oxidation and viscosity.
Another method is to install an inline particle
counter direct in your hydraulic system which
give you the contamination level according
to the international rules, the disadvantage
with this method is that you only get the
contamination level in the oil.
General
The intention is to verify the condition of the oil
during operation. The motors should be running
at normal operation while the sample is taken.
The cleanliness is extremely important during
sampling.
Always use bottles adapted to oil samples,
they can be ordered from any fluid analysis
laboratory.
Never try to clean your own bottle if you want
a true value of the result.
The sample should be taken by using a mini-
mess hose connected to a mini-mess coupling.
Always clean the connections carefully before
you connect the mini-mess hose to the
coupling.
Be careful when connecting the mini-mess
hose because the oil beam can be dangerous
and should never point against any person or
other sensible object. Check and be aware of
the pressure you may have on the connection
before you connect.
Degree of contamination
Heavy contamination of the oil causes in-
creased wear of the hydraulic system compo-
nents. The cause of the contamination must be
immediately investigated and remedied.
Summary of Contents for Compact CA
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