Graco 4035BD, 4043BD important safety instructions Operating Instructions, Priming the pump

OPERATING INSTRUCTIONS

Priming the pump

It is essential to prime the pump on initial start-up and each time the water supply is disconnected from the unit after initial use.

1.Lay the high pressure hose out to remove any loops.

Water flow will constrict the hose, creating tight loops if the hose is not straight.

Note: The nozzle assembly should not be connected to the gun assembly at this time. See “Nozzle Connec- tion” pg. 9.

2.With the trigger gun locked in the “OFF” position, turn the water supply completely on. Pointing the gun in a safe direction, unlock the trigger gun and squeeze the trigger.

Low pressure water will begin flowing from the hose/ gun assembly. This allows the unit to prime and purge any air from the system. The unit is primed when water flow is uninterrupted by air.

3.Once the unit is primed, release the trigger and lock the gun in the “OFF” position. Securely connect the nozzle assembly. (See “Nozzle Connection” pg. 9)

NOTICE

Be certain the nozzle is not connected to the unit while priming the pump. Priming allows mineral de- posits to be released from the system which would obstruct or damage the nozzle assembly resulting in costly repairs.

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