User's Manual

7308059
Operation
CAUTION
The pump is designed for continuous operation.
Regular shutdown at night or on weekends may
cause premature bearing wear and invalidate the
warranty.
Do not let the pump run dry. Operating the pump for
more than 10 seconds without fluid circulating
through it will overheat the pump and damage it.
Flushing and Priming System
(See the Typical Installation and Fig. 3.)
The procedure given here is for a stand-mounted
pump, two mix tank system as shown in the Typical
Installation on page 4. Some specific instructions
may not apply to other systems; consult your plant’s
flushing procedures.
Flushing is important; it cleans all equipment and lines
of impurities. Following these instructions will help
assure satisfactory operation with quality control.
CAUTION
1. Be sure the motor rotates in the correct direction
and the drive coupler clearance is set at 0.094
in. (2.39 mm). See Fig. 3.
2. If the motor labors or the pump does not run
smoothly, check the motor for high amp draw
and check the thrust bearing for overheating.
The normal operating temperature is from 120
to 150 F (49 to 65 C). If the temperature is
higher than 150 F (65 C), consult a qualified
Graco representative after a repair check of the
drive coupler clearance.
3. Be sure the circulating lines are flushed and
primed with fluid as instructed below. Do not
flush the pump with any acid, caustic or abrasive
flush solution (line stripper) of any type. The
pump is designed to circulate automotive paint
coatings only.
1. Preparing to flush the inside of the mix tanks
a. Close the outlet valves (W) of both tanks.
b. Pour about 100 gallons (380 liters) of the
appropriate solvent into each tank.
c. Open the outlet (W) and return valves (K) on
one tank only.
2. Starting the pump
(Always use this procedure to start the pump)
a. Close the isolation valves (Q) on one filter.
b. Use the valve (Q) in front of the other filter to
control the pump flow to 50 psi (3.5 bar) until
the lines are full. Then completely open the
valve.
c. Run the pump for several minutes, and then
shut off the pump.
d. Recheck the drive coupler for 0.094 in. (2.39
mm) clearance.
CAUTION
The pump coupler and bearing could move up during
shipment and then, when the pump is operated, it
could move down, leaving too much clearance. This
could damage both the coupler insert and the cou-
pler.
3. Checking the system for leaks
a. Restart the pump and check the entire system
for leaks.
b. Tighten leaking joints as necessary.
c. Periodically check for leaks during flushing.
4. Continue flushing
a. Continue circulating the solvent, changing the
solvent as needed until the system is thor-
oughly flushed.
b. When the system is clean, stop the pump.
c. Drain all filtered residue from the filters (P).
d. Reconnect the return line (E) to the back
pressure valve (F).