TROUBLE
POSSIBLE CAUSE
PROBABLE REMEDY
PUMP FAILS TO
PRIME
Strainer clogged.
Check strainer and clean if neces
sary.
Leaking or worn seal or pump gasket.
Check pump vacuum. Replace
leaking or worn seal or gasket.
Lining of suction hose collapsed.
Replace suction hose.
Air leak in suction line.
Correct leak.
Suction check valve or foot valve
clogged or binding.
Clean valve.
Discharge head too high.
Measure lift w/vacuum gauge. Re
duce lift and/or friction losses in
suction line.
Suction lift too high.
Install bypass line.
Not enough liquid in casing.
Add liquid to casing. See
PRIMING
.
Suction check valve contaminated or
damaged.
Clean or replace check valve.
Product vapor pressure too high.
Cool pump and product suction line.
Pump speed too slow.
Check engine output; consult en
gine operation manual.
OM-06790
80 SERIES
TROUBLESHOOTING
PAGE D - 1
TROUBLESHOOTING - SECTION D
Review all SAFETY information in Section A.
Before attempting to open or service
the pump:
1. Familiarize yourself with this manual.
2. Shut down the engine and take pre
cautions to ensure that the pump will
remain inoperative.
3. Allow the pump to completely cool if
overheated.
4. Check the temperature before open
ing any covers, plates, or plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cautiously.
7. Drain the pump.
