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Idiomas disponibles
Idiomas disponibles
6 HP Pump G Series • MLP-28/46S
TROUBLE SHOOTING GUIDE
Pump will not cycle
Check to make sure air supply inlet is adequate and that the air exhausts and pilot vent are not plugged.
Check for blocked outlet line. Check that the air cycling valve spool moves freely in the sleeve and the
two pilot valves are functioning correctly.
Pump cycles without pumping
Check for air or excessive restriction in hydraulic inlet system. Check for suction leak if hydraulic supply
tank is remote or below pump. Inspect hydraulic inlet for blockage and hydraulic check valves for
contamination on valve seats.
External leakage
Leakage around the hydraulic end cap would indicate that the end cap seals need replacing.
There are (2) seals separating the high pressure fluid and drive air. A vent hole has been placed between
these seals so as not to contaminate either chamber, (or a complete distance piece with vent holes on
distance piece models). This hole vents out of the side of the end cap on which the air valve is mounted
(both end caps on -12 double ended models). The hydraulic seal is a heavy duty, long life seal. When first
starting to pump, a moderate amount of leakage may occur. This will diminish quickly after a few minutes
of pumping at an 80% load and will continue to get better with usage. A very slight amount of air leakage
from the drive section out this vent is normal when the pump is at stall.
Air leakage
Tighten necessary fittings. Check and replace seals where leakage occurs.
Excess liquid in air exhaust
Check for water and/or air in the air system. Clean and drain filter. If liquid in air exhaust is the fluid being
pumped, first make sure the vent hole is not obstructed and then check the piston rod seals. If the seals
are worn and need replacing, check the hydraulic fluid for abrasive contaminants. When ordering spare
parts advise pump serial number, model, spare part number and description. To protect the Haskel pump
during non-operational periods, fill the hydraulic barrel with oil and plug the inlet and outlet ports.
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