Bennett 111103, Operation, Service & Parts Manual

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Bennett T140 Operation, Service, & Parts Manual Troubleshooting
17
PROBLEM 2: THE PUMP RUNS BUT DELIVERY IS SLOW.
Refer to the table below for a description of various causes of the problem and the solution.
Cause Solution
The fuel supply level is low. Fill the storage tank.
The storage tank vent pipe is partially obstructed. Clean the vent pipe.
The strainer screen is partially plugged. Remove obstructions from the screen or filter assembly
The pump bypass valve is not seated properly. Remove and clean the strainer screen.
The V-Belt is loose. Adjust the V-Belt
The motor voltage is too low. Check the power supply voltage. Check for too many pieces of equipment on
one electrical line.
A blade or blades in the pump are worn or broken. Check the blades and replace if necessary.
An automatic nozzle has been installed. Delivery speed will be reduced by 10-25%. If maximum speed is desired,
replace with a manual nozzle.
The motor is defective. Inspect the motor for loose connections. If no loose connections are found,
the motor is defective. Repair or replace.
There is a slow leak in the suction line. Start the pump and open the nozzle. If bursts of air are felt while holding a
finger on the vent tube, the suction line is damaged. Repair or replace.
The suction line is obstructed or the foot valve, angle, or vertical
check valve is partially stuck and will not open fully. Connect a vacuum gauge to the ¼’plug on the filter cover. Turn the pump on
and open the nozzle. A reading of 11 to 14 inches of mercury indicates a
partial obstruction in the suction line. Clean or replace the suction line
components.
The pump control valve is partially stuck and will not open fully. Remove the valve and clean thoroughly.
The nozzle check valve is sticking. Clean or replace the nozzle check valve.
The hose is defective (Flattened) Replace the hose.
PROBLEM 3: THE MOTOR WILL NOT R UN
Refer to the table below for a description of various causes of the problem and the solution.
Cause Solution
The power is off. Check the circuit breaker in the station.
The motor is defective. Disconnect the power supply. Inspect the motor for loose connections. If
none are found, repair or replace the motor.
PROBLEM 4:THE DISPENSER DOES NOT DELIVER AN ACCURATE AMOUNT OF PRODUCT
Refer to the table below for a description of various causes of the problem and the solution.
Cause Solution
There is an obstruction in the control valve. Clean the control valve. It must slide freely in the valve cavity.
There is an obstruction in the air eliminator vent tube. Clean the vent tube.
The meter needs calibration. Check calibration test equipment for accuracy. Calibrate the meter.
PROBLEM 5:THERE IS FUEL RUNNING OUT OF THE VENT TUBE OPENING WHEN THE PUMP IS IN OPERATION
Refer to the table below for a description of various causes of the problem and the solution.
Cause Solution
There is an obstruction in the atmospheric float valve. The valve is
being held closed. Clean the float and valve area. Make sure the float opens completely.
The suction chamber in the pump is flooded. *(Above ground tank)
* Not Recommended
Check the storage tank level. If it is higher than the pumping unit (*above
ground tank), the condition will continue. Install a Tokheim 52 valve.
* Not Recommended
PROBLEM 6:THE COMPUT ER JUMPS WHEN THE PU MP IS TURNED ON
Refer to the table below for a description of various causes of the problem and the solution.
Cause Solution
The control valve is not seated properly Check the valve for an obstruction between the O-ring and the seat. Inspect
the O-ring for damage. Replace the valve or O-ring, if needed.
There is an obstruction in the expansion relief dill valve Check the valve by pulling the spring-loaded seat. Clean any foreign matter
from the valve. To install the dill valve in the control valve, use a valve tool.
The gaskets are leaking. Replace worn gaskets.
There is a worn nozzle. Replace the nozzle.
There is a leak in the hose. Replace the hose.
Temperature extremes cause the liquid to expand or contract. Problem will be solved when the pump begins to operate.