Gasboy 70 Series Installation - Manual (Page 20)

Troubleshooting Troubleshooting
Page 16 MDE-4673 Consumer Electric Pumps Installation / Operation / Parts Manual · May 2007
Pump delivery is slow. Check for dirty strainer. Clean the strainer.
Check for clogged or dirty filter. Change the filter.
An automatic nozzle will reduce flow rate about
25%. Check flow rate without the nozzle or with
standard nozzle. A farm type automatic nozzle
(such as Husky 1GS swivel) provides the best
flow. Replace/repair nozzle.
Check for supply line restriction. Test the pump with a vacuum gauge. If
vacuum is abnormally high, there is a
restriction.
Pump loses prime. Inspect the check valve poppet and seat for clean
mating surfaces. Clean, if necessary.
If, after a period of non-use, a pump delivers
product initially, followed by air and then full flow,
there is an air leak in the suction line. Repair the suction line.
Install a pressure gauge between the hose and the
nozzle. Operate the pump at full flow. Close the
nozzle closed and turn off the pump. If pressure falls to zero rapidly, replace
the check valve and clean and inspect
the valve seat.
Inaccurate delivery. Calibrate the meter. (See “Meter Calibration” on page 11 )
A clock-fast error (more on the register than is
delivered) in excess of 2.5% is due to air in the
suction line or vaporization of gasoline in the
pump. Check pump for the loss of prime and
suction line for the air leak.
A clock-slow condition may result from the
following:
• Any slowing of the register or measuring
chamber due to excessive friction resistance
or mechanical failure.
• Inadvertent bypassing of the measuring
chamber.
Check register for zero setback; check
the reset lever return to the top of the
slot in the meter cover after setback;
check for “hang-up” of number wheels
in register or gears not meshing.
Pump delivers product
when not turned on. In aboveground storage tank, if the fluid level is
higher than pump, positive head pressure may
force the product through pump. Install a pressure regulating valve or a
solenoid valve in the supply line to the
pump.
Check for defective vacuum breaker. Replace if necessary
Vacuum breaker spits
product Clean and replace the vacuum breaker. If problem persists, install the return
line kit.
Symptom Checks Corrective Action