Keep The Hydraulic Oil Clean; Working Methods; Component Locations Pr 17, Pf 21 - Husqvarna Rider PR 17 Workshop Manual

Keep the Hydraulic Oil Clean

Dirt and contaminants are the greatest enemies of
a hydraulic system. Moreover, long work sessions
at high power are very dependent on whether the
hydraulic oil has been able to retain its condition.
Only use the type of oil specified in the lubrication
schedule. Ensure that it is checked at regular
intervals and kept at the right level.
All good hydraulic oils are supplied in clean
containers and are filtered so that they are as free
from contaminants as possible. It is when the
container is opened or stored that problems occur.
When a container is opened, one must be sure
that the area around the cap is completely free
from dust, dirt, rag fibres, and water. If a special
container, funnel, or hose is required for filling the
system, ensure that it is clean.
IMPORTANT INFORMATION
Waste oil shall be treated as
environmentally hazardous and turned in
to the workshop or other designated area
for disposal.
Avoid skin contact; wash with soap and
water in case of spills.
106
English-
HYDRAULIC SYSTEM

Working Methods

Cleanliness also applies to components that have
been removed or are to be installed. Keep in mind
that a replaced component should probably be
inspected with the aid of test equipment at a
workshop. It is important that the component is in
the same shape when it is inspected as it was
when it was removed from the machine.
Otherwise, the real reason for the malfunction
cannot be established and the test equipment can
be made dirty. It can also be so that the submitted
component is not faulty and is therefore returned
without action.
The following points should be gone through
routinely when working with the hydraulic system:
1. Clean as necessary.
2. Protect the area where the work is to be
done against dust and other impurities in
the air. Plastic sheets and the like may be
used.
3. Clean thoroughly with white spirit or
equivalent. Remember that it is not
enough to clean only those parts that are
directly attacked. Even areas from where
dirt can fall onto the work area must be
cleaned, as must the tools used. Clean
with a suitable brush, dry with a cloth,
and clean again if needed. Finally, rinse
the dismantling area, tubing equipment,
and so on with pure white spirit.
4. Apply appropriate protection immediately
after all pipes and hoses have been
removed. Components (even those
replaced) as well as pipes and tubing
must be protected.
5. All components included in pipe fixtures
shall be replaced or cleaned in pure white
spirit and blown clean with compressed
air before being refitted.
6. Maintain cleanliness when measuring
pressure. Rinse both parts of the quick
connectors with white spirit before each
connection. Ensure that any protective
components are clean before refitting.

Component Locations PR 17, PF 21