Operation; Pump Shutdown - Graco Husky 715 Instructions And Parts List

Pressure Relief Procedure
WARNING
PRESSURIZED EQUIPMENT HAZARD
The equipment stays pressurized until pressure is
manually relieved. To reduce the risk of serious
injury from pressurized fluid, accidental spray from
the gun or splashing fluid, follow this procedure
whenever you:
Are instructed to relieve pressure,
Stop pumping,
Check, clean or service any system equipment,
Install or clean fluid nozzles.
1. Shut off the air to the pump.
2. Open the dispensing valve, if used.
3. Open the fluid drain valve to relieve all fluid pres-
sure, having a container ready to catch the drain-
age.
Flush the Pump Before First Use
The pump was tested in air, to eliminate possible
contamination of the fluid you are pumping by test
fluids such as water. Prior to use, flush the pump
thoroughly with a compatible solvent. Follow the steps
under Starting and Adjusting the Pump.
Starting and Adjusting the Pump
WARNING
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can
cause serious injury or death if splashed
in the eyes or on the skin, inhaled, or
swallowed. Do not lift a pump under pressure. If
dropped, the fluid section may rupture. Always
follow the Pressure Relief Procedure above
before lifting the pump.
1. Be sure the pump is properly grounded. Read
FIRE OR EXPLOSION HAZARD on page 3.

Operation

2. Check all fittings to be sure they are tight. Use a
compatible liquid thread sealant on all male
threads. Tighten the fluid inlet and outlet fittings
snugly. Do not overtighten the fittings into the
pump.
3. Place the suction tube (if used) in the fluid to be
pumped.
NOTE: If the inlet pressure to the pump is more than
25% of the outlet working pressure, the ball check
valves will not close fast enough, resulting in inefficient
pump operation.
4. Place the end of the fluid hose (K) into an appro-
priate container.
5. Close the fluid drain valve (H).
6. With the pump air regulator (G) closed, open all
bleed-type master air valves (B, E).
7. If the fluid hose has a dispensing device, hold it
open while continuing with the following step.
Slowly open the air regulator (G) until the pump
starts to cycle. Allow the pump to cycle slowly until
all air is pushed out of the lines and the pump is
primed.
If you are flushing, run the pump long enough to
thoroughly clean the pump and hoses. Close the
air regulator. Remove the suction tube from the
solvent and place it in the fluid to be pumped.
NOTE: If the pump does not start, turn the reset shaft
(21) on the air valve (A). See Fig. 4 on page 8.

Pump Shutdown

To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure at left.
At the end of the work shift, relieve the pressure.
WARNING