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PROBLEM
POSSIBLE CAUSE
Pump won't prime
1. Suction line problem
2. Bypass valve open
3. Vanes sticking
4. Gasket leakage
5. Excessive rotor or vane wear
6. Outlet blocked
7. Vapor Lock
Pump hums but will
1. Dirt in pump cavity
not operate
2. Broken key
3. Motor failure
Low capacity
1. Excessive dirt in screen
2. Suction line problem
3. Bypass valve sticking
4. Vanes sticking
5. Excessive rotor or vane wear
6. Hose or nozzle damage
7. Plugged filter
8. Low fluid level
Pump runs slowly
1. Incorrect voltage
2. Vanes sticking
3. Wiring problem
4. Motor problem
Motor stalls
1. Bypass valve sticking
2. Low voltage
3. Excessive rotor or vane wear
4. Debris in pump cavity
Motor overheats
1. Pumping high viscosity fluids
2. Clogged screen
3. Restricted suction pipe
4. Pump rotor lock-up
5. Motor failure
Motor will not turn on
1. No power
2. Incorrect/loose wiring
3. Switch failure
4. Motor failure
5. Thermal protector failure
Fluid leakage
1. Bad o-ring gasket
2. Dirty shaft seal
3. Bad shaft seal
4. Incompatible fluid
5. Loose fasteners
115 VOLT WIRE DIAGRAM
ORANGE
AUX.*
BLACK
115V
WHITE
NEUTRAL
GREEN
GROUND
ORANGE
AUX.*
BLACK
115V/230V
BLACK/WHITE
115V/NEU
GREEN
GROUND
TROUBLESHOOTING
SOLUTION
Check for leaks in suction line
Remove and inspect valve; must move freely & be free of debris
Check vanes and slots for nicks, burrs and wear
Tighten covers and joints
Check rotor & vanes for excessive wear or damage
Check pump outlet, hose, nozzle & filter for blockage
Reduce vertical and horizontal distance from pump to liquid;
Remove automatic nozzle
Clean out pump cavity
Remove all debris & replace key
Return to place of purchase
Remove and clean screen
Check suction line for leaks or restrictions; it may be too small, too long or not airtight
Remove and inspect valve, must move freely & be free of debris
Check vanes and slots for wear
Check rotor & vanes for excessive wear or damage
Replace hose or nozzle
Replace filter
Fill tank
Check incoming line voltage while pump is running
Check vanes and slots for nicks, burrs and wear
Check for loose connections
Return to place of purchase
Remove and inspect valve; must move freely & be free of debris
Check incoming line voltage while pump is running
Check rotor & vanes for excessive wear or damage
Clean pump cavity
These fluids can only be pumped for short periods of time (less than 30 minutes duty cycle)
Remove and clean screen
Remove and clean pipe
Clean and check pump rotor and vanes
Return to place of purchase
Check incoming power
Check wiring
Return to place of purchase
Return to place of purchase
Return to place of purchase
Check all o-ring gaskets
Clean seal & seal cavity
Replace seal
Refer wetted parts list to fluid manufacturer
Tighten fasteners
MOTOR
IF UNSURE OF THE MOTOR VOLTAGE, PLEASE REFER TO THE VOLTAGE
RATING ON THE MOTOR NAMEPLATE (ITEM 29 ON PARTS LIST).
MOTOR
WIRE DIAGRAM
*WARNING: AUX. WIRE (orange) IS A LIVE WIRE!
The AUX. lead wire is insulated and enclosed when shipped. Do not
connect this wire without first verifying the 'ON' line voltage of the wire
for compatibility to the equipment to be installed. Maximum amperage
on wire is 1 ampere. The wire must be insulated and enclosed in the
junction box if not used.
6
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