22
KI-OM-0591 Rev 3
Troubleshooting
5
Troubleshooting
The tables in this section are designed as a troubleshooting guide to aid in the identification of
faults and outline possible corrective action.
5.1
Pump Specific Fault Diagnosis and Maintenance
Problem
Possible Cause
Solution
Pulsation
Faulty Pulsation Damper
Check pre-charge of pulsation
Damper; if low, recharge or install a
replacement component.
Low Pressure
Belt slippage.
Tighten or replace; use correct belt.
Air leak in inlet plumbing.
Disassemble, reseal and re-
assemble.
Pressure gauge inoperative or not
registering accurately.
Check with new gauges, replace faulty
gauge.
Relief valve stuck, partially plugged
or improperly adjusted, valve seat
worn.
Clean and adjust relief valve; check
for worn and dirty valve seats.
Replace worn parts.
Inlet filter clogged or improperly
size.
Clean. Use 50 micron filter element.
Check more frequently.
Worn packing. Abrasives in
pumped fluid or severe cavitation.
Inadequate water supply.
Install proper filter. Check fluid supply
available to the pump.
Low Pressure
Fouled or dirty inlet or discharge
valves.
Clean inlet and discharge valve
assemblies.
Worn inlet or discharge valves.
Replace worn valves, valve seats and
/ or discharge hose.
Leaking discharge hose.
Pump runs extremely
rough, pressure very low
Restricted inlet or air entering the
inlet plumbing.
Size inlet plumbing correctly; check for
air tight seals.
Inlet restrictions or stuck inlet or
discharge valve.
Clean out foreign material.
Leaking HP seals.
Replace worn seals.
Water leakage from under
the inlet manifold
Worn packing.
Install new packing.
Worn male and female adaptor.
Install new male and female adaptor.
Oil leak between
crankcase and pumping
section.
Worn crankcase piston rod seals.
Replace crankcase piston rod seals.
Summary of Contents for WHE - 3
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