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Operation
311304H 9
Priming Pump
All pump models should prime within 5 seconds after
pump is turned on up to a height of 36 in. (91 mm).
Pumps installed at height up to 5 ft. (1.52 m) may have
difficulty priming. Follow procedure below to initiate
prime. Pumps installed at suction height above 5 ft.
(1.52 m) will have difficulty in holding prime. It is recom-
mended that check valve (Graco part no. 260217) be
added to the bottom of the suction tube to help maintain
prime.
If prime in not achieved in 30 seconds after turning the
pump on use the following procedure to initiate prime;
1. Remove 90° Union Swivel (15) from ¾” Inlet Nipple
(14).
2. Pour fluid being pumped into pump outlet until com-
pletely filled.
3. Re-assemble Union Swivel (15) back onto nipple
(14). Turn pump on. The pump should gain prime in
under 5 seconds.
4. If pump still does not gain prime check for any major
leaks in the system. If no leaks are found then the
pump is mechanically defective and should be
reported to Graco Product Service for disposition.
It is important that the swivel end of the 90° union
swivel (15) is assembled to the ¾” outlet nipple (14)
for proper sealing (see fig. 6). Also, if the pump has
difficulty priming it is easy to remove the swivel and
pour fluid into the pump outlet cavity when assem-
bled this way.
If prime is lost
1. First make sure there are no fluid leaks from the
pump outlet out to the fuel nozzle. Any leaks after
the outlet will allow air to push the fluid column back
to the tank and prime will be lost.
2. If no leaks are detected on the outlet side of the
pump, remove the pump from the tank and inspect
the suction tube and pump inlet for leaks.
3. If the system is leak free and the suction height
guidelines are followed the pumping system should
not lose prime.
Operation
On/Off switch lever (8d) is located under nozzle holder.
Remove nozzle before turning pump on.
1. Move switch lever (8d) on.
2. Insert nozzle into tank and actuate nozzle lever to
dispense fuel.
3. Immediately after fueling turn switch lever (8d) off.
Maintenance
1. Clean inlet strainer (3b) after every 50 hours of
operation.
2. To remove inlet strainer (3b), remove four screws
(3c) and strainer cover (3a). Remove and clean
strainer.
3. If strainer is excessively dirty, clean tank to protect
pump and the equipment being fueled.
4. After cleaning strainer, replace strainer and cover.
Make sure cover seal (3d/7e) is in place.
All guidelines and procedures are based on pump-
ing diesel fuel. If pumping gasoline priming may be
more difficult due to the lift of gasoline dependent
on Reid's vapor pressure of the gasoline and it's
temperature. The lower the vapor pressure and
temperature, the higher the possible lift.
Before servicing, turn pump off and open the
nozzle to relieve pressure.
CAUTION
Do not operate pump dry. Do not run pump for more
than 5 minutes with nozzle closed. Do not operate
pump for more than 30 minutes continuously in 1 hour.