Maintenance - Graco Series B Instructions-Parts List Manual

Shutdown and Care of the Pump
For overnight shutdown, follow the Pressure Relief Pro-
cedure Warning, below.
Always stop the pump at the bottom of the stroke to pre-
vent the fluid from drying on the exposed displacement
rod and damaging the throat packings.
Check the tightness of the pump packing nut periodically.
The nut should be tight enough to prevent leakage, but no
tighter. Always follow the Pressure Relief Procedure
Warning, below, before adjusting the packing nut.
WARNING
Pressure Relief Procedure
To reduce the risk of serious bodily injury, splashing
in the eyes or on the skin, or injury from moving
parts, always follow this procedure whenever you
shut off the pump, when checking or servicing any
part of the system, when installing, cleaning or
changing spray nozzles, and whenever you stop
spraying.
1. Shut off the air to the pump.
2. Close the bleed–type master air valve (required
in your system).
3. Close the pump air valve.
4. Close the pump restrictor valve.
5. Shut off the air to the agitator (if used).
6. Hold a metal part of the spray gun firmly to the
side of a grounded metal pail, and trigger the
spray gun to relieve pressure.
7. Open the drain valve, having a container ready
to catch the drainage.
8. Leave the drain valve open until you are ready to
spray again.
Flush Regularly and Before Storing the Pump
WARNING
To reduce the risk of injury from splashing or static
sparking, always hold a metal part of the spray gun
firmly to the side of a grounded metal pail, and use
the lowest possible fluid pressure when flushing.
If you are pumping fluid which dries, hardens or sets up,
flush the system with a compatible solvent as often as
necessary to prevent a build–up of dried fluid in the pump
or hoses.

MAINTENANCE

Flushing the Agitator Air Motor
To reduce the risk of serious injury, including cuts,
amputation of fingers, or splashing fluid in the eyes
or on skin, always shut off the agitator and discon-
nect the air line before checking or repairing the agi-
tator.
If the agitator operation is erratic or sluggish, clean the air
motor (11) as follows:
1. Remove the muffler and fill the muffler cavity with
kerosene. Screw the muffler back in. Also , fill the oil-
er with kerosene.
2. After soaking for about 10 minutes, cover the agitator
muffler with a rag and operate the agitator slowly until
all the kerosene is blown out.
To reduce the risk of injury from splashing kerosene
in the eyes or on the skin, or inhaling kerosene mist,
cover the agitator muffler with a rag and keep your
face away from the exhaust while flushing.
3. Lubricate the agitator air motor as described below
before using the agitator again.
NOTE: Do not try to repair the air motor yourself. Con-
tact a Graco authorized service depot.
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 flush-
ing, 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 Warning, to the
left.
Lubrication
Pump Air Motor
If you are not using an accessory air line lubricator, manu-
ally lubricate the motor daily. Disconnect the air regulator,
place about 15 drops of light machine oil in the pump air
inlet, and reconnect the regulator. Turn on the air supply
to blow the oil into the motor.
Agitator Air Motor
If you are not using an accessory air line lubricator, manu-
ally lubricate the motor daily. Place 2 or 3 drops of light
machine oil in the agitator air inlet. Cover the agitator
muffler with a rag to avoid contaminating your fluid, then
operate the agitator for about 30 seconds to blow the oil
into the motor.
WARNING
WARNING
CAUTION
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