MAINTENANCE
WARNING: THE ELECTRICAL POWER CORD MUST BE DISCONNECTED FROM ELECTRICAL
OUTLETS BEFORE PERFORMING MAINTENANCE OR REPAIR PROCEDURES.
Maintain oil level:
Check hydraulic oil level every 30 hours of operation. Add SIMPLEX oil when necessary. Oil level should be no
more than 2” from top of reservoir plate.
Completely change oil at least twice a year. The following conditions require more frequent oil changes:
a. Rigorous duty, where oil temperature may reach 140 F.
b. High humidity environment and extreme changes in temperature that can result in condensation inside
the reservoir.
c. Dirty or dusty environments that may contaminate the oil.
Clean oil Filter Screen Once a Year
a. Loosen and remove reservoir plate bolts. Lift pump unit off the reservoir, being careful not to damage
the gasket.
b. Unscrew screen from the bottom of pump unit and clean with nonflammable solvent.
c. Blow dry and reassemble.
Keep areas around pump unobstructed to provide good air flow around the motor and pump.
Keep the motor and pump as clean as possible.
Flushing the Pump:
If you suspect your pump has been contaminated or discover sludge or other deposits on internal components, you
should toughly flush the pump.
a. Remove the old oil from the reservoir, than toughly clean the reservoir and refill with a clean,
nonflammable flushing oil.
b. Reassemble the pump and motor to the reservoir.
c. Now run the pump in no pressure for 1 or 2 minutes maximum.
d. Unplug the pump and remove the motor and pump assembly again. Now drain the flushing oil and
reclean the inside of the reservoir. (Make sure flushing fluid is also drained from pump assembly).
Refill the reservoir with SIMPLEX hydraulic oil and reassemble the pump.
