Graco BULLDOG 222248 - Manual (Page 6)

6 306–646
MAINTENANCE
Shutdown and Care of the Pump
Always follow the Pressure Relief Procedure Warning
on page 7 whenever you shut of f the pump. Stop the
pump at the bottom of its stroke to keep fluid from drying
on the exposed displacement rod and damaging the
throat packings.
Every 40 hours of operation, check that the packing nut/
wet–cup (21) is tight. Follow the Pressure Relief Proce-
dure Warning on page 7 first. Tighten just snug – do not
overtighten or the packings may be damaged.
Always flush the pump before the fluid dries in the pump
and hoses. If the pump is to be stored for any period of
time, and you are pumping water–based fluid, first flush
the pump with water, then with mineral spirits to protect
the pump parts.
Flushing
To reduce the risk of fluid injection injury, static sparking,
or splashing in the eyes or on the skin, follow the Pres-
sure Relief Procedure Warning on page 7, and remove
the spray tip (spray guns only) before flushing . Hold a
metal part of the gun/valve firmly to the side of a
grounded metal pail and use the lowest possible fluid
pressure during flushing.
Lubrication
The accessory air line lubricator (E) provides automatic
air motor lubrication. For daily , manual lubrication, dis-
connect the air regulator (C), place about 15 drops of light
machine oil in the pump air inlet, reconnect the regulator
and turn on the air supply to blow oil into the motor.
Corrosion Protection
Water, or even moist air, can cause your pump to
corrode. To help prevent corrosion, never leave the
pump filled with water or air. After normal flushing,
flush the pump again with mineral spirits or oil–
based solvent, relieve pressure, and leave the min-
eral spirits in the pump. Be sure to follow all steps
of the Pressure Relief Procedure W arning on
page 7.
WARNING