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••• 7 •••
5.5 AFTER COMPLETING THE JOB
Before disconnecting hoses, fittings, etc., first be sure the ram is unloaded and retracted, then unplug the power
cord and shift the hydraulic controls several times to release system pressure. Store the pump in a clean, dry area.
6.0 PERIODIC MAINTENANCE
Completely change the hydraulic oil and clean the intake screen and magnet (located in the reservoir) twice a year. If
equipped, change the external oil filter twice a year (Use Simplex oil only, Model # AO1, 1 gallon). Change the oil
more frequently when used in extremely dusty areas or when the oil has been overheated. Using oil other than
Simplex Brand may void the pumpʼs warranty.
The following conditions require more frequent oil changes.
• Rigorous duty, where oil temperature may reach 150°F.
• High humidity environment and extreme changes in temperature that can result in condensation inside the
reservoir.
• Dirty or dusty environments that may contaminate the oil.
• Frequent connection and disconnection of hydraulic hoses and components.
WARNING: The electrical power cord must be disconnected from the electrical outlets before performing
maintenance or repair procedures.
6.1 MAINTAIN OIL LEVEL
Check hydraulic oil level every 30 hours of operation (sight gauge should be completely covered in oil when all tools
are retracted. Add Simplex oil (Model # AO1 – 1 gallon) when necessary. Oil level should be no more than 1” from
top of reservoir plate – with cylinders retracted and motor off.
6.2 CLEAN OIL INTAKE SCREEN ONCE A YEAR
Loosen and remove reservoir plate bolts. Lift pump unit off the reservoir, being careful not to damage the gasket.
Applies to 1, 1.5, 2, 2.5 gallon reservoirs:
Remove the 5 Allen socket head cap screws securing the screen
to the 1st stage gear pump. Care should be taken not to remove
the center plate and gears. Remove and clean with nonflammable
solvent, blow dry clean. Reinstall in reverse order and torque bolts
to 75 inch pounds. Keep the motor and pump as clean as possible.
Applies to the 5 and 10 gallon reservoirs:
Unscrew screen from bottom of pump unit and clean with
nonflammable solvent. 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.
6.3 FLUSH THE PUMP
If you suspect your pump has been contaminated or discover
sludge or other deposits on internal components, you should
thoroughly flush the pump. Remove the old oil from the reservoir,
then thoroughly clean the reservoir and refill with a clean,
nonflammable flushing oil. Reassemble the pump and motor to
the reservoir. Now run the pump in no load condition for 1 or 2 minutes maximum. Unplug the pump and remove
the motor and pump assembly again. Now drain the flushing oil and re-clean 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.
/IL&ILL'AL-ODELS
3IGHT'AUGE
$RAIN0LUG'AL
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