Operation; Starting And Adjusting The Pump; Maintenance; Lubrication - Graco HUSKY 715 Instructions-Parts List Manual

Flushing the Pump Before First Use
The pump was tested in water. If the solution could con-
taminate the fluid you are pumping, flush it thoroughly
with a compatible solvent. Follow the procedure in Start-
ing and Adjusting the Pump.

Starting and Adjusting the Pump

WARNING

To reduce the risk of serious injury, splashing in the
eyes or on the skin, and toxic fluid spills, NEVER
move or lift a pump under pressure. If dropped, the
fluid section may rupture. Always follow the Pres-
sure Relief Procedure Warning on page 12 be-
fore moving or lifting the pump.
NOTE: For Model 223–747 only , refer also to the oper-
ating instructions in Manual 308–035 for addi-
tional information regarding lube evacuation
systems.
1. Be sure the pump is properly grounded. Read and
follow FIRE OR EXPLOSION HAZARD, on page 3.
2. Check all fittings to be sure they are tight. Be sure to
use a compatible liquid thread sealant on all male
threads. Torque the fluid inlet and outlet fittings to 15
ft–lb (20 N.m) maximum, and the air inlet fitting to 100
in–lb (11 N.m) maximum. Do not overtighten the
fittings into the pump.
3. Place the suction tube (if used) in the fluid to be
pumped.
NOTE: This information applies to all models, including
Model 223–747.

Lubrication

After every 500 hours of operation, or monthly , remove
the hose from the pump air inlet and add two drops of ma-
chine oil to the air inlet.

CAUTION

Do not over–lubricate the pump. Excess oil is ex-
hausted through the muffler, which could contami-
nate your fluid supply or other equipment.

Flushing and Storage

Flush the pump often enough to prevent the fluid you are
pumping from drying or freezing in the pump and damag-

OPERATION

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 outlet hose into an appropriate
container.
5. Close the fluid drain valve.
6. With the air regulator closed, open all bleed–type
master air valves.
7. If the outlet hose has a dispensing device, hold it
open while continuing with the following steps.
8. Slowly open the air regulator (D) 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 thor-
oughly clean the pump and hoses. Close the air regu-
lator. Remove the suction hose from the solvent and
place it in the fluid to be pumped.
If you are shutting down the pump , remove the suc-
tion hose from the fluid container and run the pump
until the fluid is forced out of the system. Then shut
off the air supply immediately.
If you are going to use the pump , start the pump
again. Place the suction hose in the supply container.

MAINTENANCE

ing it. Always flush the pump before storing it for any
length of time. Use a compatible solvent.

Tightening Threaded Connections

Before each use, check all hoses for wear or damage and
replace as necessary. Be sure all threaded connections
are tight and leak–free, but do not overtighten.
At least every six months, check and tighten all threaded
connections, including manifold screws, clamps, plugs,
and valve screws. Do not overtighten.

Tightening the Clamps

When tightening the clamps (6), be sure to tighten the
bolts (14) and nuts (15) on both sides of the pump. On the
side with the grounding strip (45), you must loosen the
nuts above the grounding strip first. Torque the nuts un-
derneath the strip to 6–10 ft–lb (8–14 N.m), then retorque
the nuts above the grounding strip. See Fig 11.