Hydraulics - Seafish

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• Metal wear particles
• Packing and gasket fragments - due to wear in the seals
and wrong assembly of the seals
• Paint flakes-these occur if protecting paints have not been
applied properly
• Pipe scale-due to the pipes not being cleaned internally
when the system was made or repaired
• Pipe thread compound - excessive amounts of sealing
paste used when making joints
• Rust particles -from corrosion or poor internal cleaning of
pipes
• Weld spatter-small droplets of weld metal in the region of
a welded joint can become loose.
• Water-taken in through seals and breathers
• Wrong oil -the wrong type of oil used when re-filling or
making up the oil level
The remaining 30% of faults are divided into:
10% - Mechanical failures such as bearing failure and seal
failures.
10% - Improper diagnosis of trouble or faulty repair.
5% - Overloading of equipment
5% - Miscellaneous causes
The oil being added to the system should be carefully filtered,
even from a new unopened drum. The area around the filling
plug should be cleaned before the filling plug is removed and
only clean containers used for filling.
Since all contamination cannot be prevented, the system must
be constantly filtered in such a way that the dirt entering the
system is removed by the filters at the same rate.
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