Instructions / Assembly

Troubleshooting
This Troubleshooting guide provides basic diagnostic assistance. If you have further questions, contact us at 1-800-634-
2695 (M-F 8 AM–5 PM ET), or on the web at “www.llrite.com”.
DANGER! DO NOT open or attempt to repair the motor on your Tuthill pump. Return it to the place
of purchase for service. Opening the motor case will compromise the integrity of the Explosion Proof
construction and void any existing warranty, approvals, and certications (i.e.: ATEX, UL listing, CE, etc.).
DANGER! Disconnect all power prior to performing any service or maintenance. Failure to disconnect the
power may cause electrical shock, or unexpected starting of the motor, resulting in injury or death.
Symptom Cause Cure
Pump won’t prime. Suction line problem. Check suction line for leaks or restrictions; it may be
too small in diameter, too long, not air tight, or too low
vertically.
Vanes sticking. Check vanes for nicks, damage, obstructions, or
excess wear. Replace as necessary.
Excessive rotor, vane, rotor cover,
or housing wear.
Inspect rotor, vanes, rotor cover, and housing for
excess wear; replace as necessary.
Inlet / Outlet blocked. Check pump, hose, nozzle, and lter / strainer for
blockage.
Vapor lock. Reduce vertical or horizontal distance from pump to
liquid.
Power connections reversed. Correct power connections.
Motor stalls / fuse blows. Short in wiring. Inspect electrical cable for shorts and replace as
necessary.
Excess rotor or vane wear. Check vanes for nicks, damage, obstructions, or
excess wear. Replace as necessary.
Pump rotor lock-up. Clean and inspect rotor and vanes.
Debris in pump cavity. Clean debris from pump cavity.
Components swell from pumping
water.
Let pump dry completely.
Low capacity. Excessive dirt in screen. Remove and clean screen.
Suction line problem. Check suction line for leaks or restrictions; it may be
too small in diameter, too long, not air tight, or too low
vertically.
Excessive rotor, vane, rotor cover,
or housing wear.
Inspect rotor, vanes, rotor cover, and housing for
excess wear; replace as necessary.
Hose or nozzle damage. Replace hose or nozzle.
Low uid level. Rell tank.
Pump runs slowly. Incorrect voltage. Check incoming line voltage while pump is running.
Vanes sticking. Check vanes for nicks, damage, obstructions, or
excess wear. Replace as necessary.
Wiring problem. Check for loose connections.
Motor problem. Return to place of purchase.
Bold text indicates repairs that are not serviceable by the owner; pump must be returned to the point of purchase for repairs.
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