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Operation
Operation
Pressure Relief Procedure
Follow the Pressure Relief Procedure
whenever you see this symbol.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing
fluid and moving parts, follow the Pressure Relief
Procedure when you stop spraying and before
cleaning, checking, or servicing the equipment.
1. Close the supply line shutoff valve, and then the
return line shutoff valve.
2. Open the dispensing valve to relieve the pressure.
3. Place a container under the drain valve to catch any
drainage. Open the pump outlet drain valve.
4. Leave the drain valve open until you are ready to
dispense again.
If you suspect that the dispensing valve, extension, or
grease fitting coupler is clogged, or that the pressure
has not been fully relieved after following the steps
above, VERY SLOWLY loosen the coupler or hose end
coupling and relieve pressure gradually, then loosen
completely and clear the clog.
Before Starting the Pump
Recommended Hydraulic Oil
Use a Graco-approved Hydraulic Oil or a premium, ISO
grade 46 petroleum-based hydraulic oil containing rust
and oxidation inhibitors and anti-wear agents.
Before using any other type of oil in this motor contact
your Graco distributor. Unauthorized use of lesser
grade oil or substitutes may void the warranty.
8
1. Check the hydraulic fluid level in the hydraulic
power supply before each use, and add fluid as
necessary to fill the lines.
2. Flush the pump before using it for the first time to
remove the light oil that was left in after factory
testing to protect the pump from corrosion. Be sure
the solvent used is compatible with the fluid to be
pumped and the pump's wetted parts. See
Technical Data, page 20. Flush until clean solvent
comes from the outlet hose.
To Start the Pump
1. Turn on the hydraulic power supply.
2. Open the return line shutoff valve (H) first, and
slowly open the hydraulic supply line shutoff valve
(K). (F
. 2)
IG
3. Adjust the hydraulic inlet pressure from 500 to 1500
psi (3.5 to 10.3 MPa, 35 to 103 bar) with the
regulator control adjustment (M) on the hydraulic
fluid control (A).
Increasing the inlet pressure increases the outlet
pressure. Decreasing the inlet pressure decreases
the outlet pressure. Always use the lowest pressure
possible to obtain the desired results. This reduces
pump wear.
NOTICE
Never allow a pump to run dry of the fluid being
pumped. A dry pump quickly speeds up and can
damage itself. If it speeds up, shut off the power
supply to the reciprocator immediately. Refill the
supply container and prime the pump to eliminate
air.
To prevent the pump from running dry, use a low-level
cutoff valve.
308391P
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