Flushing The Pump; Problem / Cause - Solutions - Simplex G4 Series Quick Start Manual

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. 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.
7.0 TROUBLESHOOTING
PROBLEM
Sporadic Cylinder Action:
Motor Will Not Start:
Noisy Operation:
Pump Oil is Over Heating:
Pump Runs But Will Not Pump Oil:
••• 7 •••
CAUSE-SOLUTION
• Air in the hydraulic system. Bleed the hydraulic circuit.
• Check reservoir oil level.
• Have motor checked for proper operation.
• Check manufacturers operating instructions.
• Air in system.
• Be sure the oil reservoir is filled to normal level.
• Check all points where air might leak into system.
• Clogged or blocked intake screen.
• Inspect for high pressure leakage at the pump (leaking at plug or
relief valve).
• Oil level is low. Fill reservoir to normal level, or retrofit the pump with
larger reservoir.
• Pump is not primed. Run pump a few minutes tipping from side to
side.
• Inspect to make sure that external adjustable relief valve is set
properly.
• Defective control valve, take to nearest Simplex Authorized Service
Center for repair.
• Check to make sure the intake screen is not clogged. Clean if
needed.
• Check oil reservoir is low. Fill as needed.
• Oil viscosity is too high. Replace with SIMPLEX oil.
www.tksimplex.com