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Pressure Relief Procedure
WARNING
SKIN INJECTION HAZARD
Fluid under high pressure can be injected
through the skin and cause serious injury.
To reduce the risk of an injury from
injection, splashing fluid, or moving parts,
follow the Pressure Relief Procedure whenever you:
•
are instructed to relieve the pressure,
•
stop spraying/dispensing,
•
check or service any of the system equipment,
•
or install or clean the spray tip/nozzle.
1. Lock the gun/valve trigger safety.
2. Shut off the air or hydraulic supply to the pump
3. In air-powered systems, close the bleed-type master
air valve (required in your system). In
hydraulic-powered systems, close the hydraulic
supply line valve first, then the return line valve.
4. Unlock the gun/valve trigger safety.
5. Hold a metal part of the gun/valve firmly to the side
of a grounded metal pail, and trigger the gun/valve to
relieve pressure.
6. Lock the gun/valve trigger safety.
7. Open the drain valve (required in your system)
and/or the pump bleeder valve, having a container
ready to catch the drainage.
8. Leave the drain valve open until you are ready to
spray/dispense again.
If you suspect that the spray tip/nozzle or hose is
completely clogged, or that pressure has not been fully
relieved after following the steps above, very slowly
loosen the tip guard retaining nut, nozzle, or hose end
coupling and relieve pressure gradually, then loosen
completely. Now clear the tip/nozzle or hose.
PACKING NUT/WET-CUP
Fill the packing nut/wet-cup (3) 1/3 full with Graco Throat
Seal Liquid (TSL) or compatible solvent. See Fig. 6.
Using the supplied wrench (104), adjust the packing nut
weekly so it is just snug; do not overtighten. Follow the
Pressure Relief Procedure Warning above before
adjusting the packing nut.
Operation/Maintenance
(ALL PUMPS)
FLUSHING THE PUMP
The pump is tested with lightweight oil, which is left in to
protect the pump parts. If the fluid you are using may be
contaminated by the oil, flush it out with a compatible
solvent before using the pump.
WARNING
For your safety, read the warning section, FIRE AND
EXPLOSION HAZARD on page 5 before flushing, and
follow all recommendations given there.
Model 24Y192
Shown
Bleed hole must
face down.
104
Fig. 6
3
308148
13
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