After Completing The Job; Periodic Maintenance; Maintain Oil Level; Clean Oil Intake Screen - Simplex G1 Manual

5.3 AFTER COMPLETING THE JOB

Before disconnecting hoses, fittings, etc., first be sure the tool is unloaded and retracted, then unplug the power
cord.

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 pump's 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 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.
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.
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.
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.
••• 6 •••
Sight Gauge
Drain Plug
Oil Fill
Sight Gauge