Graco Twistork A Series Operation manual

INSTRUCTIONS–P ARTS LIST 308–246
Rev. B
Supersedes Rev A
This manual contains IMPORT ANT
W
ARNINGS AND INSTRUCTIONS
READ AND RET AIN FOR REFERENCE
AIR DRIVEN
Twistork HELIX MIXER
100 psi (7 bar) MAXIMUM WORKING AIR PRESSURE
Model 235–653, Series A
Stainless Steel Agitator, with suction feature
For use in bung-mounted 55 gallon drum
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
 COPYRIGHT 1992 GRACO INC.
TABLE OF CONTENTS
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation & Maintenance 4. . . . . . . . . . . . . . . . . . . . . .
Accessories 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Drawing 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensional Drawing 7. . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data Back Cover . . . . . . . . . . . . . . . . . . . . . . .
Graco Phone Numbers Back Cover . . . . . . . . . . . . . . .
Warranty Back Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0910A
Patented in the United States and Europe

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SAFETY W ARNINGS
FOR PROFESSIONAL USE ONLY. OBSERVE ALL WARNINGS
Read and understand all instruction manuals before operating equipment.
EQUIPMENT MISUSE HAZARD
General Safety
Any misuse of the equipment or accessories, such as
overpressurizing, modifying parts, using incompatible
chemicals and fluids, or using worn or damaged parts,
can
cause them to rupture and result in serious bodily in -
jury, including splashing in the eyes or on the skin, fire,
explosion
or property damage.
NEVER alter or modify any part of this equipment; doing
so could cause it to malfunction and make it dangerous to
operate.
CHECK all spray equipment regularly and repair or
replace
worn or damaged parts immediately .
System Pressure
The MAXIMUM WORKING PRESSURE of the agitator
is 100 psi (7 bar). Over-pressurizing the agitator or ac-
cessories could cause a part to rupture. To reduce the
risk of serious bodily injury, including splashing in the
eyes or on the skin, and property damage, NEVER ex-
ceed
the maximum air and fluid working pressure of any
component or accessory used in the system.
Fluid Compatibility
BE SURE all fluids and solvents used are chemically
compatible
with the “W etted Parts” shown in the TECH-
NICAL DATA on the back page. Always read the fluid
and solvent manufacturer’s literature before using the
fluid
or solvent with this agitator .
FIRE OR EXPLOSION HAZARD
All electrically conductive objects or devices in the
spray
area MUST be properly grounded.
When operating the system, any ungrounded objects in
the spray area can become electrically charged. Arcing
may
occur if these objects then come in contact or close
to ground. Arcing of suf ficient energy levels can ignite the
fluid being sprayed, fumes from solvents, dust particles,
and other flammable substances. This can cause a fire,
explosion, or electrostatic shock and result in serious
bodily
injury and property damage.
To ground the agitator , remove the grounding screw
(A) and lockwasher (B). See Fig 1. Secure the ground
wire
terminal (C) to the agitator with the screw and lock -
washer. Connect the other end of the ground wire to a
true
earth ground. See page ACCESSORIES to order a
ground wire and clamp.
01089
Fig 1
A
B
C
MOVING P ARTS HAZARD
The rotating helix of the agitator can pinch or amputate
your
fingers or other body parts and can cause splashing
in the eyes or on the skin. T o reduce this risk, always shut
off the agitator and disconnect the air line before check -
ing
or repairing any part of the agitator .
IMPORTANT
United States Government safety standards have been
adopted under the Occupational Safety and Health Act.
These standards – particularly the General Standards,
Part
1910, and the Construction Standards, Part 1926 –
should be consulted.

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INSTALLATION
Air Requirements
For continuous use, the 1/2 HP agitator air motor typically
requires 2 scfm (0.06 m  /min.) of air at 400 rpm and with
100 psi (7 bar) inlet pressure.
Air Line Accessories
Install an air line filter to remove harmful dirt and moisture
from the air supply . See ACCESSORIES.
Downstream
from the filter , install an air line lubricator for
automatic air motor lubrication. Set the lubricator feed
rate
at 1 to 3 drops per hour .
Installing the Agitator
1. If using the agitator suction feature, remove the fluid
tube plug (7) at the bottom of the agitator, before
installing
it into the drum. See P ARTS DRA WING.
NOTE: If there is a thick sediment in the bottom of the
fluid container that could clog the agitator ’ s fluid
tube, thoroughly mix the fluid with the plug (7) still
in place in the agitator before removing it to use
the suction feature.
2. Install the agitator on the container cover by screw-
ing
the helix through the drum bung hole and screw -
ing
the agitator housing into the bung hole. Refer to
the DIMENSION DRA WING.
3. Position the air motor so the air line can easily be
attached
to the needle valve’ s 1/8 npt inlet (B), with -
out obstructing any other system components. See
Fig 2.
4. Attach the air line between the needle valve’ s 1/8 npt
air inlet and the 1/8 npt air supply manifold outlet.
5. If using the agitator suction feature, connect a fluid
line
to the 3/4–14 npt(f) agitator fluid outlet (A).
Fig 2
11
12
0910A
A
1a
KEY
AFluid Outlet
B 1/8 npt Air Inlet
1a Muffler
11
Needle V alve
12 Check Valve
B

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OPERATION & MAINTENANCE
WARNING
To
reduce the risk of serious bodily injury , including
cuts, amputation of fingers, and splashing in the
eyes
or on the skin, always shut of f the agitator and
disconnect the air line before checking or repairing
the
agitator .
Operating the Agitator
NOTE: If there is a thick sediment in the bottom of the
fluid
container that could clog the agitator ’ s fluid
tube, thoroughly mix the fluid with the plug (7) still
in place in the agitator before removing it to use
the suction feature. Refer to the P ARTS DRA W-
ING.
1. Fill
the fluid supply container .
2.
Start the agitator .
3. Use
the agitator needle valve to regulate the agitator
speed. The needle valve has numbered graduations
to refer to when setting the agitator speed.
NOTE: If an air shut-off valve is installed in the supply
line
and used to stop the agitator , the same agita -
tor speed will be set each time the agitator is
used without repeating the above procedure.
See
ACCESSORIES.
CAUTION
DO NOT operate the agitator at a high speed for a
long period of time. Excessive agitator speed can
cause foaming of fluid (making the fluid unusable),
vibration, and increased wear on parts. Always ag -
itate
the fluid only enough to maintain even mixing.
4. Operate the agitator continuously while supplying
paints
or other fluids to the system.
5. To stop the agitator , close the air valve in the air sup -
ply
line if you have one, or close the agitator needle
valve.
NOTE: The
agitator rotation may be reversed by switch -
ing
the muf fler (1a) and needle valve (1 1). Refer
to Fig 2.
Checking Fluid Viscosity
Install a fitting and siphon tube (not provided) into the agi -
tator’s 3/4 npt(f) fluid outlet (A). Refer to Fig 2. With the
siphon tube routed to a separate container, pump the
fluid
out through the agitator outlet port to check viscosity .
Maintaining the Agitator Air Motor
If an air line lubricator is not installed, the air motor must
be manually lubricated every 8 hours. Lubricate the agi -
tator
air motor by placing 2 or 3 drops of SAE No. 10 light
oil in the motor’s air inlet. Run the agitator for about 30
seconds.
The
air check valve (12) allows make-up air to enter the
closed drum as fluid is drawn out through the agitator out -
let
port. Refer to Fig 2. The air check valve should be in -
spected
and cleaned periodically .
If the air motor operation is erratic or sluggish, flush the
motor
as follows:
1. Remove the needle valve and fill the air inlet cavity
with
kerosene. Screw the needle valve back in. See
Fig 2.
2. Soak for about 10 minutes, then run the agitator
slowly
until all the kerosene is blown out. Repeat the
process if the motor still doesn’t run smoothly .
WARNING
To reduce risk of serious bodily injury, including
splashing
kerosene in the eyes or on skin, keep face
and body away from exhaust while flushing.
NOTE: An Air Motor Repair Kit is available. Order part
number
224–954.
Aligning the Outlet Housing after Repairing
or
R eplacin g t h e O utle t H ousin g o r A i r M otor
CAUTION
Improper installation of the outlet housing could
cause the agitator shaft to bind against the outlet
housing
bearing and damage it.
1. Place the agitator in a vertical position and loosen the
three outlet housing screws (17). See the PARTS
DRAWING.
2. Apply
25 psi (1.7 bar) minimum air pressure to the air
motor. Adjust the needle valve so the agitator is bare -
ly
turning.
3. While the agitator shaft is turning, torque the three
outlet housing screws to 80 to 100 in-lbs (9 to
1
1.3 N m).
4. If the agitator shaft still binds, repeat steps 1 to 3
above.

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ACCESSORIES
Must be purchased separately .
AIR LINE LUBRICATOR
250 psi (17.5 bar) MAXIMUM WORKING PRESSURE
214–847 3/8 npt(f); 5 oz. capacity
214–848 1/2 npt(f); 8 oz. capacity; 80 cfm flow rate
AIR FILTER
250 psi (17.5 bar) MAXIMUM WORKING PRESSURE
106–148 Includes 40 micron element, 5 oz bowl;
3/8 npt(f)
106–149 Includes 40 micron element, 8 oz. bowl;
1/2 npt(f)
AIR SHUT–OFF VALVE
500 psi (35 bar) MAXIMUM WORKING PRESSURE
Nickel-plated steel with PTFE  packings
208–390 1/4 npt(m) x 1/4 npt(m)
208–391 3/8 npt(m) x 3/8 npt(f)
208–392 3/8 npt(f) x 1/4 npt(m)
208–393 3/8 npt(m) x 3/8 npt(m)
GROUNDING CLAMP AND WIRE 222–011
12 ga, 25 ft (7.6 m) wire
QUICK DISCONNECT FLUID FITTING
235–221
2500 psi (172 bar) MAXIMUM WORKING PRESSURE
Pin type, push locking; 316 stainless steel; 3/4 npt
Includes the following parts:
111–740 Quick Disconnect Fluid Coupler
111–739 Quick Disconnect Fluid Fitting
111–749 Quick Disconnect Fluid Adapter

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PARTS DRA WING
1
6
Apply medium
grade adhesive to
external threads
1a
3
5
7
*8
9*
11
17
16
T orque to
80–100 in-lbs
(9–1 1.3 N m)
4
15
13
14*
12*
REF NO. 11
Needle V alve
Includes items 1 1a–11e
11a
11b
11c
11e*11d
10
Lubricate,
Lips
face down
Lubricate,
Lips face up
0911
0909A
T orque to
35–40 in-lbs
(4–4.5 N m)
Be sure air motor shaft
bottoms out in mounting
hole before tightening
T orque to
80–100 in-lbs
(9–1 1.3 N m)
22
20
Lubricate,
Lips face up
Lubricate,
Lips
face down
NOTE:Install the seals (23) on the agitator shaft (5)
before installing the shaft into the housing (4).
*23

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PARTS LIST
Model 235–653 TwistorktHelix Mixer
Stainless Steel, with suction feature
Includes items 1 to 23
REF
NO. P ART NO. DESCRIPTION QTY
1** 111–310 MOT
OR, air; Includes item 1a 1
1a 101–709 S
MUFFLER, exhaust 1
3 101–682 SCREW
, cap, sch; 1/4–20 x 0.625 3
4 224–875
HOUSING, outlet, stainless steel 1
5 224–395 SHAFT
, agitator 1
6 224–393
HELIX, agitator 1
7 187–054
PLUG, fluid tube 1
8* 101–946
PIN, cotter 1
9* 111–312
O-RING, V itonr1
10 102–207 SCREW
, set, socket;
1/4–20 UNC 3A 2
11 202–233
NEEDLE V AL VE ASSEMBL Y
Includes items 18a to 18e 1
11a 101–326 SSCREW
, set, sch; #10 1
11b 156–930 S
BARREL, needle 1
11c 159–448 S
HOUSING, valve 1
11d 159–449 S
NEEDLE, valve 1
11e* 159–589 S
O-RING, buna-N 2
12* 187–053 SEAT
, check valve 1
13 187–050
HOUSING, check valve 1
14* 105–691
BEARING, ball 1
15 110–208
PLUG, hdless pipe; 1/8–27 nptf 1
16 187–577 PLA
TE, motor mounting 1
17 102–023 SCREW
, cap, hex hd;
1/4–20 x 0.75 3
20 111–593 SCREW
, grounding; hex, No. 8–32 1
22 157–021 W
ASHER, lock 1
23* 235–994
SEAL KIT ; graphite-filled PTFE 1
* Recommended “tool box” spare part. Keep on hand to
reduce down time.
** An Air Motor Repair Kit is available. Order part no.
224–954.
MANUAL CHANGE SUMMAR Y
The manual was changed from Rev A to Rev B to make the
following changes:
Assembly
Changed Status Ref No. Part No. Name
235–653 DELETED 18 111–923 Seal
DELETED 19 111–922 Seal
ADDED 23 235–994 Seal Kit
DIMENSIONAL DRA WING
8.78 in.
(223 mm)
33.25 in.
(845 mm)
2 – 1 1-1/2 npt
3/4 npt(f)
OUTLET PORT
0910A
T o top
of bung
1/8 npt

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THE GRACO W ARRANTY AND DISCLAIMERS
WARRANTY
Graco
warrants all equipment manufactured by it and bearing its name to be free from defects in material and workmanship on
the date of sale by an authorized Graco distributor to the original purchaser for use. As purchaser ’ s sole remedy for breach of this
warranty, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment proven defec -
tive.
This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco’ s written rec-
ommendations.
This warranty does not cover , and Graco shall not be liable for , any malfunction, damage or wear caused by faulty installation,
misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or substitution of
non–Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility with Graco
equipment of structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, instal -
lation, operation or maintenance of structures, accessories, equipment or materials not supplied by Graco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor
for verification of the claim. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The
equipment will be returned to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any
defect in material or workmanship, repairs will be made at a reasonable charge, which charges may include the costs of parts,
labor and transportation.
DISCLAIMERS AND LIMITATIONS
The terms of this warranty constitute purchaser ’ s sole and exclusive remedy and are in lieu of any other warranties (express or
implied), including warranty of merchantability or warranty of fitness for a particular purpose , and of any non–contractual
liabilities, including product liabilities, based on negligence or strict liability . Every form of liability for direct, special or consequen -
tial damages or loss is expressly excluded and denied. In no case shall Graco’ s liability exceed the amount of the purchase price.
Any action for breach of warranty must be brought within two (2) years of the date of sale.
EQUIPMENT NOT COVERED BY GRACO WARRANTY
Graco makes no warranty
, and disclaims all implied warranties of merchantability and fitness for a particular purpose , with
respect to accessories, equipment, materials, or components sold but not manufactured by Graco. These items sold, but not
manufactured by Graco (such as electric motor , switches, hose, etc.) are subject to the warranty , if any , of their manufacturer .
Graco will provide purchaser with reasonable assistance in making any claim for breach of these warranties.
TECHNICAL DA TA
Maximum W orking Pressure 100 psi (7 bar). . . . . . .
Maximum Recommended Agitator Speed: 800 rpm
Air Consumption
At 800 rpm with 100 psi (7 bar) air inlet pressure:
5 scfm (0.14 m #/min.)
At 400 rpm with 100 psi (7 bar) air inlet pressure:
2 scfm (0.06 m #/min.)
Noise Level at 800 rpm 68 dBA . . . . . . . . . . . . . . . . . .
Wetted Parts 304 & 316 Stainless Steel, . . . . . . . . . . .
Rytonr filled PTFE,r V itonr
Viton r is a registered trademarks of the DuPont Co.
GRACO PHONE NUMBERS
TO PLACE AN ORDER , contact your Graco distributor ,
or call Graco: 1–800–328–0211 T oll Free
FOR TECHNICAL ASSISTANCE ,service repair infor-
mation
or answers about the application of Graco equip -
ment,
call: 1–800–543–0339 T oll Free
Sales Offices: Atlanta, Chicago, Dallas, Detroit, Los Angeles, Mt. Arlington (N.J.)
Foreign Offices: Canada; England; Switzerland; France; Germany; Hong Kong; Japan; Korea
GRACO INC. P .O. BOX 1441 MINNEAPOLIS, MN 55440–1441
PRINTED IN U.S.A. 308–246 9/92 Revised 4/93