Graco 226-167 SERIES"A" - Manual (Page 8)

5, Tf surge tank 205-/4.76 is being used with­
out filter parts installed, it should be drained
as often as experience indicates necessary. Stop
pump and open dump valve. After material has
drained completely from tank, close dump valve.
6. Shut off air pressure to unit and relieve,
nrpssure in air line, before removing screen
156-967 in air linestrainer 204-999 (accessory if
used). Daily, clean this screen and at reassembly
add light oil to screen cavity in nut 156-944. Re­
fer to Fig. 4.
FLUSHING UNIT
The freouency with which unit should be flush­
ed depends upon type or types of material pumped,
general operating conditions, and usage of unit.
It Is wise to establish a regular flushing sched­
ule. In some instances it may be desirable to
flush unit daily while in other cases less freouent
flushing may prove satisfactory. Unit must be
flushed at the end of each working week. Thorough­
ly flush unit with thinner or solvent of type re­
commended for use with the material, as follows;
1. Remove spray tip and g'jn filter cartridge.
If used, from spray gun and soak in clean recommend­
ed .type solvent.
2. With air supply to unit turned on, dis­
connect air hose to agitator and connect it to
elevator to raise unit or manually raise and
hook hanger over truck handle.
3. With pump air petcock 202-338 open, direct
spray gun into material container and start pump
operating by squeezing trigger of spray gun. Unit
v/ill pump air, forcing the material out of the
system back into container. When the air has
flushed out as much material as possible, stop pump
and open manifold dump valve. Drain excess materi­
al from all loops in hose. After material has
stopped draining, close manifold dump valve.
4. Remove container of material from base and
position in its place a pail containing- approxi­
mately 2 gallons of compatible solvent. Lower pump
into pail of solvent.
5. Set air to pump at approximately 20 p.s.i.,
direct gun to material container and trigger gun
to start pump. Pump will move the solvent, under
pressure through the system, flushing the internal
cavities of manifold and filter or surge tank. When
solvent appears at gun, stop pump, release pressure
in system and remove spray gun.
6. Remove spray gun from hose and thoroughly
clean in accordance with procedure outlined in
separate Instruction Sheet for the spray gun. Keep
spray gun head immersed in solvent until attached
to hose again.
7. Direct end of material hose into pail of
solvent and start pump by opening air line petcock
202-338. Allow thinner or solvent to circulate
through system and back into pail for a period of
10 to 15 minutes. Wash material from exterior of
lower immersion pump.
3. After thoroughly flushing unit stop pump
an.d connect material hose to spray gun. Squeeze
trigger of spray gun and open air line petcock to
start pump. Allow pump to operate long enough to
fill hose and spray gun with solvent. Keep unit
filled -ivlth solvent overnight or weekend until
ready to spray again.
9* Recirculate solvent for about 5 minutes
prior to charging unit with material.
10. Close spray gun and raise pump. Start
pump operating, by squeezing trigger of spray gun
and continue operating until most of solvent has
been blown out of system. Drain excess solvent '
from loops in hose and filter or surge chamber,
if used. After draining tank of filter or surge
chamber, close its dump valve.
11. Replace container of material upon base,
lower pump into container, connect air hose to
agitator and charge unit with properly mixed
material,
NOrS; When changing colors or incompatible
types of material, flush unit as described, HOW­
EVER, a longer circulation period will necessarily
be required and in some cases a second flushing
using clean thinner or solvent may be necessary.
^Iso ii manufacturer of another type of material
to be sprayed recommends using a different type of
thinner or solvent, the thinner or solvent used in
the first flushing must be flushed out to eliminate
the possibility of separation or jelling of ma­
terial components. The surge tank or tank of
manifold or filter should be removed and parts
thoroughly scrubbed clean. Surge tank is equipped
id-th a removable plug to facilitate cleaning.
AGITATOR
Agitator air motor 101-687 must be properly
oiled with a light air motor oil, whenever unit
is shutdown or is not to be operated for a period
of 8 ho\irs or more. All compressed air contains
some moisture and if air motor is not properly
lubricated before shutdown, rust may result. To
oil motor;
1. Remove oiler screw from air motor top.
2. Apply 3 to 4 drops of oil to oiler. ■
3. Replace oiler screw and run motor for
' about 1/2 minute.
Air motor should require no attention other
than to be oiled. However, if too heavy an oil
has been used or other improper oiling practices
have been followed gumming of rotor may result,
in-i4iich case air motor should be flushed as
follows;
161-415
\ ^
IS
8. , »J
F I G . 5
OILER SCREW
1. Remove exhaust muffler 161-415. Fill to
overflowing with kerosene. Replace muffler.