Graco HIGH–FLO 243737 Instructions Manual page 14

Starting and Adjusting the Pump
1. Fill the wet-cup/packing nut (12) one half full with
Graco Throat Seal Liquid (TSL). See Fig. 7.
2. Charge the surge tank, if you are using one. See
the separate instruction manual, 307707.
3. Open the shutoff valves between the pump and
supply tanks, and between the pump and surge
tank.
4. Open the dispensing valve(s) or spray gun(s).
5. To adjust the system, perform the following appli-
cable procedure:
In an air-powered system:
a. Open the bleed-type master air valve.
b. Adjust the air regulator to the minimum pres-
sure necessary for the pump to cycle slowly.
c. Operate the pump slowly until all air is purged
from the fluid lines.
d. Close the gun or valve.
e. Adjust the setting on the pump runaway valve,
if used.
In a hydraulic-powered system:
f. Turn on the hydraulic power supply.
g. Open the flow control valve all the way.
14 309136
Operation
h. Adjust the pressure-reducing valve until you
get the desired fluid pressure. Run the pump
until all air is purged from the fluid lines.
i. Count the cycle rate of the pump.
j. Close the flow control valve until the cycle rate
and fluid pressure start to drop.
k. Open the flow control valve slightly until the
cycle rate and fluid pressure return to the
desired level. This method of setting the hy-
draulic controls ensures proper pump opera-
tion and will prevent pump runaway and dam-
age if the fluid supply runs out.
l. Close the gun or valve.
In a circulating system, the pump operates continu-
ously until the power supply is shut off. In a direct
supply system, the pump starts when the gun or
valve is opened, and stops when the gun or valve is
closed.
ceed the maximum air/hydraulic and fluid working
pressure of the lowest rated component in your
system. See EQUIPMENT MISUSE HAZARD,
System Pressure, on page 3.
WARNING
COMPONENT RUPTURE HAZARD
To reduce the risk of serious injury, in-
cluding splashing in the eyes or on the
skin, and property damage, never ex-