Autoquip VERTICAL RAM LIFTS - DUAL RAM - Manual (Page 30)

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CAUTION!
Never run the pump for more than a couple of seconds without pumping
oil. This applies to low oil conditions, improper motor rotation, running the
pump against the relief pressure after the lift is fully raised against the
physical stops, running overloaded beyond capacity, or running at reduced
speed because of pinched or obstructed hydraulic lines.
PUMPS
Pumps cannot be field repaired, nor should they be taken apart. Wear or any internal
damage occurs to the gears and to the pump body, making pump repair impractical.
Complete replacement is necessary when the pump becomes defective.
GOULD SOLENOID VALVES
Piston pilot operated Gould solenoid valves should last for years in general applications.
The coil assemblies are replaceable by removing one screw. Should the lift “creep”
down, the valve seat can be cleaned by removing the bonnet nut without taking the
valve from the pipeline. Take care not to damage or force the plunger stem over which
the coil is assembled. The lift must be fully lowered to relieve all pressure before
dismantling. When removing the bonnet, the valve should be restrained by using a
wrench on the hex flats at the pipe ports, not on the body. Oil that is too heavy for
existing temperature will cause a sluggish valve action or refusal to open when under
full-load pressure. These valves need a minimum pressure drop of 5 psi across the
valve to operate.
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GENERAL MAINTENANCE