Bennett 3000 Spec 300 Series Instruction Manual Service & Troubleshooting
62
HOW TO TEST THE VALVE
To test the two-stage valve follow the testing procedures below.
CHECK FOR PROPER FUEL FLOW
The best way to check a valve is to pump fuel and see if you are getting full flow. You can do this by pumping into a test bucket as shown
below. Normal flow on a standard dispenser is generally 10 - 12 gallons per minute in the United States and 30+ gallons for the Little
Squirt / Big Squirt.
FEEL THE SOLENOID FOR “CLICKS”
Test to see if the valve is opening is by placing your hand on the solenoid portion of the valve and pumping fuel as shown below. If the
solenoids are working properly, you should feel two distinct “clicks” as the solenoids are energized. One “click” for the slow flow and one
“click” for the fast flow solenoid. You will not feel the second click until the system sees nine pulses. Make sure that the small hole (in the
center of the fast flow plunger) in the fast flow valve is not restricted. You can do this with by a visual inspection. Note: The plunger must
be removed from the body of the coil section of the valve for inspection.
REMOVE THE FAST AND SLOW FLOW PLUNGERS
You can remove both the fast flow and the slow flow plungers as shown below from the solenoid by unscrewing the solenoid from the
valve casting and the two plungers should slide out. Make sure the fast flow (grooves along the sides) is the first one that comes out and
that the slow flow is after that. Be careful not to lose the spring in the slow flow plunger.
OPEN THE VALVE BODY TO CHECK THE DIAPHRAGM
Open the valve body and check the diaphragm to make sure that there are no loose or foreign objects, any tears in the diaphragm and
that the spring is in place properly as shown below. Note: Always carry extra O-rings because if you open a valve that has had fuel pass
through it the O-ring will “swell” and you will not be able to get it back in its groove.
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