Half/Pack
®
Issued April 2018
Pump
Copyright 2018, Heil Environmental
Printed in the U.S.A.
Pump
33
PUMP INSPECTION
Important Inspection Tasks
Check pressure fluid level in tank.
Check cleanliness/condition of the hydraulic fluid.
A check of the hydraulic fluid can be regarded only as a rough indicator for the fluid condition (milky/black appearance,
gumming, sludge at the tank bottom, or smell of burnt oil).
Check filter clogging indicators/difference pressure switches (when apparent) while system is in operation.
Check persistent fluid temperature while system is in operation (usually <140 degrees F, maximum 176 degrees F).
Check operation pressure levels and operation speeds.
Check for external leaks.
Check tubes and hoses for proper mounting and indications of rubbing.
Damaged tubes and hoses should be replaced immediately!
Check visually the hydraulic accumulators.
Check visually all electrical connections of motor, solenoids, sensors, and pressure switches.
PUMP MAINTENANCE
Important Inspection Tasks
A. Hydraulic Fluid
The service life of hydraulic fluids is highly dependent on the operation temperature and the conditions. The maximum
operation temperature usually is 80°C, an increase of 10°C will reduce the service life by 50%.
Different kinds of pressure fluids should not be mixed as this might cause sludge or gumming. It is recommended to flush
the system prior to any change of the fluid type and to contact the fluid manufacturer.
The fluid should be drained while the system is warm. Used oil should be disposed professionally.
Heavily aged or contaminated fluid can't be improved by simply adding fresh fluid.
The hydraulic fluid has to be filled-in via the system filter or via a mobile filtration system. The absolute filter rating for
this initial filtration must be at least as high as the rating of the system filter.
Fluid samples have to taken and tested for contamination kind, size, and level with the results being documented.
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