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Shutdown and Care of the Pump
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
Always stop the pump at the bottom of its stroke to
prevent fluid from drying on the rod and damaging the
throat packings. When you finish pumping always
Relieve the Pressure.
If you are pumping fluid which dries, hardens, or sets
up, flush the system with a compatible solvent as often
as necessary to prevent build up in the pump or hoses.
Every 40 hours of operation, Relive the Pressure and
remove either the warning plate (135) or the identifica-
tion plate (120) to check that the packing nut (132) is
tight. Use a 1/4 in. rod or spanning wrench. Tighten
just snug – do not overtighten or the packings may be
damaged.
WARNING
Never operate the pump with the air motor warning
plate (135) or the identification plate (120) re-
moved. These plates enclose the piston which
moves when air is supplied to the motor, and
protect your fingers from serious injury, including
amputation.
Flushing
Relieve the Pressure, then remove the spray tip
before flushing. Hold a metal part of the gun firmly to
the side of a grounded metal waste container. Use the
lowest possible fluid pressure when flushing.
Maintenance
Corrosion Protection
Never leave water or water-base fluid in the pump
overnight. If you are pumping water-base fluid, flush
with water first, then with a rust inhibitor such as
mineral spirits. Relieve the Pressure, but leave the
rust inhibitor in the pump to protect the parts from
corrosion.
Lubrication
The accessory air line lubricator (D) provides automat-
ic air motor lubrication. For daily, manual lubrication,
disconnect the regulator, place about 15 drops of light
machine oil in the pump air inlet, reconnect the regula-
tor, and turn on the air supply to blow oil into the motor.
Filter Service
Clean the filter regularly, as needed. Dried fluid can
clog the screen and greatly reduce filtering ability. To
clean, Relieve the Pressure, then open the system
drain valve and wait a few minutes for the filter to
drain. Have a bucket and solvent available.
Unscrew the bowl from the head (13). Pull the
screen (9) out of the bowl. Remove the spring (12)
from the bottom of the screen, and gently push in on
the stud to remove the support (10). If the parts are
stuck together, soak them in a compatible solvent
before disassembling. To avoid damaging the parts,
never force them apart.
Clean all parts thoroughly with a compatible solvent.
Improper reassembly prevents filtering and damages
the parts. Be sure the drain plug (27) is in place before
starting the unit.
CAUTION
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Troubleshooting
