Gasboy 580 - Manual (Page 23)

Maintenance and Troubleshooting
03/07/03 5-3
TROUBLESHOOTING
If problems are encountered in operation of the pump, follow the procedures below in an attempt
to isolate the problem.
Pump Won't Start
✓
Is the breaker at the panel turned on?
✓
Is there power at pump? Check at junction box. Voltage cannot be below 104 volts on a 115V pump;
204 on a 230V pump.
✓
Is motor overheated (thermal switch cutoff)? Be careful, the external motor surface could be hot
enough to be painful or cause injury. Let cool and re-try.
! Replace motor if above checks do not solve the problem.
Pump hums but won't start.
✓
Is voltage adequate? Check voltage with pump on bypass with nozzle closed. Voltage cannot be
below 104 volts on a 115V pump; 204 on a 230V pump.
✓
Check pump drive shaft for free operation.
!
Replace motor if above checks do not solve the problem.
Pump runs but won't prime or deliver product.
✓
Is there fuel in the tank?
✓
If register is recording but no product is being dispensed, you may have a supply line air leak.
✓
Check for an air leak on suction side of pump. Is check valve seated properly? Reassemble and prime
pump using liberal quantity of motor oil in pump cavity; if it primes, run pump full flow and snap nozzle
closed; shut off motor and check for leak on suction side of pump above check valve. Any observed
liquid leakage would indicate an air leak when pump is running with nozzle open and would prevent
priming when pump was empty.
✓
Is there an air leak in the suction line below check valve. Make accuracy check using 5 gal Seraphin
test can. Any clock fast error (see Inaccurate Delivery) in excess of 2-1/2% indicates an air leak in
the suction line. The most common source of an air leak in the suction line is the union - check union
for alignment and tightness before checking balance of suction line. If pump does not prime using oil,
suction line is blocked or has a severe air leak.
Pump delivers product but won't register.
✓
Is main totalizer recording? If yes, problem is in the register assembly. Check to be sure that the
reset mechanism is working properly. Reset button should return fully to its original position after
being pressed. The reset lever (that is activated by the reset button) should also return to its original
position.
✓
If the main totalizer is not working, the problem could be a broken/jammed measuring chamber or a
jammed pulser drive. If the unit has a pulser, check to ensure that the pulser drive operates freely.
Excessive drag exerted by this assembly will lock up the register and totalizer.
Pump delivery is slow.
✓
Check for dirty strainer.
✓
If pump has a filter, change filter.
✓
Check for supply line restriction by testing the pump with a vacuum gauge. If vacuum is abnormally
high, there is a restriction.