53
TROUBLESHOOTING
3.1 TROUBLESHOOTING TABLE (continued)
PROBLEMS POSSIBLE CAUSES REMEDY
5. Ball valve partly closed
4. Suction hose blocked
3. Dirty strainer
2. Oil too thick
1. Low oil level 1. Refill the reservoirCavitation, excessive noise from
the pump
2. Change oil for an appropriate
grade of oil according to the
ambiant temperature.
3. Clean and/or change the strainer.
4. Unblock the hose.
5. Open the valve completely
2. Check if the relief valve is
working properly.
3. After any repairs was the
hydraulics properly cleaned?
2. Is the hydraulic oil clean?2. Invisible miniature particles.
1. Have the strainer, return filter
canister been changed as
required?
1. Abrasive wear caused by small
particles.
The diaphragm (wear end plate)
and/or pump casing and/or gear
teeth have grooves on them (Do
not take apart a pump that is still
covered by warranty).
2. Over pressure.Pump casing is cracked.
1. Check to see if the suction on the
reservoir is opened.
1. Oil overheating more than 77 C
(180
o
F).
Blue or black valve diaphragm.
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