Graco 260000, 260023, 260025, 260022, 260024, 260021, 260020 Operation, Maintenance, Priming Pump

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.

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.

Operation

Operation

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.

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.

311304H 9