profluid PF70-30DFS - Troubleshooting the 70-00 DFS(SFS) Pump

PROBLEM
PROBABLE CAUSE
SOLUTION
• Low pressure or surging.
• Inlet filter element clogged.
• Fouled or dirty inlet or discharge
valves
• Pressure Unloader stuck or
plugged
• check and replace filter element.
• Clean inlet and discharge valve
assemblies. Replace it pitted or
gouged.
• Clean and adjust Unloader per
calibration instruction
• Pump runs extremely rough,
pressure low
• Air entering inlet plumbing.
• Filter element dirty.
• Leaking high pressure seals.
• Check for airtight seal.
• Check and replace filter.
• Replace with Seal Kit.
• Coolant leakage from under
the manifold, slight leakage.
• Worn seals.
• Repair with Seal Kit.
• Coolant in crankcase
• Worn crankcase oil seals or oil
seal installed backwards.
• Prolonged operations with worn
Low Pressure Seals, High Pressure
Seals, or worn plunger retainer
o-ring
• Replace oil seals.
• Repair with Seal Kit.
• Frequent or premature
failure of the packing
• Scored or cracked ceramic plungers
• Over pressure to inlet manifold.
• Abrasive material in the fluid
being pimped.
• Excessive discharge pressure.
• Running pump only.
• Replace plungers. Check compati-
bility of fluid being pumped.
• Reduce inlet pressure using an
inlet pressure regulator.
• Do not run system without a
filter.
• Verify setting of unloader valve.
• Do not run pump without coolant.
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Rev.20170601 V1.0E HPC INSTALLATION & OPERATION MANUAL 13
Section Ⅺ - Troubleshooting the 70-00DFS(SFS) Pump
In the event your pump runs bus performance is limited, refer to the chart flow:
< Model PF 70-30 DFS >