Maintenance - Graco Fast-Flo 226-943 Instructions-Parts List Manual

WARNING
Pressure Relief Procedure
To reduce the risk of serious bodily injury, in-
jury from moving parts, always follow this pro-
cluding splashing in the eyes or on the skin, or in-
cedure whenever you shut off the pump, when
checking or servicing any part of the system, when
whenever you stop dispensing.
installing, cleaning or changing nozzles, and
1. Shut off the air to the pump.
2. Close the bleed-type master air valve (required
in your system).
3.
Hold a metal part of the dispensing valve firmly
to the side of a grounded metal pail, and ac-
4. Open the drain valve (required in your system),
tuate the valve to relieve pressure.
5.
Leave the drain valve open until you are ready
having a container ready to catch the drainage.
to dispense again.
If
you
suspect that the nozzle or hose is completely
clogged, or that pressure has not been fully reliev-
ed after following the steps above, VERY SLOW-
LY loosen the hose end coupling and relieve
clear the nozzle or hose.
pressure gradually, then loosen completely. Now
Flush Pump Before Using
Pumps are tested with lightweight oil, which is left in to
fluid you are pumping, flush the pump with
a
compatible
protect pump parts. To prevent contamination of the
solvent before using
it.
To flush pump, connect short hose to pump outlet, in-
sert pump intake into a pail of compatible solvent, direct
hoso into pail and start pump
as
explained below.
Allow pump to cycle slowly for at least
5
minutes, then
stop and disconnect air hose. Push up on the ball of in-
take valve (N) to drain lower part of pump. See Fig 4.
Turn pump over to drain upper pan of pump.
Starting end Operating Pump
With the air valve (K) or regulator (CC) closed, turn on
air supply and connect air line coupler (L). See Fig 2 or
3.
Make sure all valves used in dispensing are open.
cycles
5
to 20 cycleslmin. The pump itself only takes a
Slowly open air valve (K) or regulator (CC) until pump
few strokes to prime. In a large system, however, the
of the lines. Once the pump and system is primed, use
pump may have to be cycled for several minutes to fill all
the air valve or regulator to control pump speed and cy-
cle rate: always use the lowest pressure needed to get
the desired result.
On Models 226-949.226-950 or 226-951 (or other models
using an accessory dispensing valve), pump will start
and stop as the dispensing valve
IS
opened and closed.
When used for transfer and supply operations with no
dispensing valve, pump will run whenever air
is
sup-
plied.
Fig
3
MAINTENANCE
Fill the wet-cup (P) 112 full of Graco Throat Seal Liquid
(TSL) or compatible solvent and keep
it
112 full to keep
fluid from drying on the displacement rod and damaging
pump throat packings. See Fig
3.
Lubricate the throat packings frequently when you
are
for more than a few days. Some pumps have a grease
pumping a non-lubricating fluid, or are shutting down
fitting (DD) for this purpose. See Fig
3.
The accessory air line lubricator (C) shown on page
30
provides automatic air motor lubrication. Install the
lubricator downstream from all other accessories. To
the air motor inlet, put about 15 drops of lightweight oil
manually lubricate the motor, disconnect the air line at
in the inlet, reconnect the air line and turn on the air to
blow oil into the motor.
Never allow the pump to run dry of fluid being pumped.
A dry pump will quickly accelerate to
a
high speed;
possibly damaging itself. If your pump accelerates
quickly, or is running too fast, stop
it
immediately and
check the fluid supply. If the supply container is empty
and air has been pumped into lines, prime pump and
lines with fluid, or flush and leave filled with compatible
solvent. Be sure to eliminate all air from fluid system.
To shut down, disconnect the air line coupler (L). Follow
the Pressure Relief Procedure Warning above
whenever you stop pumping.
Periodically, check the tightness of the packing nut (P).
tighter. See Fig 3.
Nut should be tight enough to prevent leakage: no
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