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Figure 4.
Maintenance
Inspection
All parts in the unit must be kept clean
during the overhaul. Handle each part with
care and always work in a clean area.
Periodic inspection of the fluid condition
and tube or piping connections can save
time consuming breakdowns and
unnecessary parts replacement. The
following should be checked regularly:
1. All hydraulic connections must be
kept tight. A loose connection in a
pressure line will permit the fluid to
leak out. If the fluid level becomes so
low as to uncover the inlet pipe
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opening in the reservoir, extensive
damage to the pump can result. In
suction or return lines, loose
connections permit air to be drawn
into the system resulting in noisy
and/or erratic operation.
2. Clean fluid is the best insurance for
long service life. Therefore, the
reservoir should be checked
periodically for dirt or other
contaminants. If the fluid becomes
contaminated, the system should be
drained and the reservoir cleaned
before new fluid is added.
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3. Filter elements also should be
checked and replaced periodically. A
clogged filter element results in a
higher pressure drop. This can force
particles through the filter which would
ordinarily be trapped, or can cause the
by-pass to open, resulting in a partial
or complete loss of filtration.
4. Air bubbles in the reservoir can ruin
the pump and other components. If
bubbles are seen, locate the source
of the air and seal the leak.
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