Graco Twistork Helix 308345T Parts list manual

308345T
EN
Instructions - Parts
BELT-DRIVEN, STAINLESS STEEL, PNEUMATIC
Twistork®Helix Agitator
with Suction Feature
For use in closed-head, bung-type, 55-gallon drums.
100 psi (0.7 MPa, 7 bar) Maximum Working Pressure
See page 2 for model information.
Important Safety Instructions
Read all warnings and instructions in this
manualbeforeusingtheequipment.Save
these instructions.
2575 II 1/2 G Ex h IIB T3 Ga/Gb
ITS03ATEX11226X

2308345T
Contents
Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Component Identification . . . . . . . . . . . . . . . . . . . . 5
Standard Agitator, Model 236629 . . . . . . . . . . . . 5
Oil-less Reversible Agitator, Model 236760. . . . . 5
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Air Line Accessories . . . . . . . . . . . . . . . . . . . . . . 7
Install the Agitator . . . . . . . . . . . . . . . . . . . . . . . . 8
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Find the Proper Agitator Speed . . . . . . . . . . . . . . 9
Pressure Relief Procedure. . . . . . . . . . . . . . . . . . 9
Maximum Siphon Flow Rate . . . . . . . . . . . . . . . . 9
Air Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 9
Nitrogen Charge the Drum. . . . . . . . . . . . . . . . . . 9
Operate the Agitator. . . . . . . . . . . . . . . . . . . . . . . 9
Shutdown Procedure . . . . . . . . . . . . . . . . . . . . . 10
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Flush the Air Motor. . . . . . . . . . . . . . . . . . . . . . . 11
Prolong the Life of the Bearing Nut . . . . . . . . . . 11
Clean the Fluid Tubes . . . . . . . . . . . . . . . . . . . . 12
Agitator Blades. . . . . . . . . . . . . . . . . . . . . . . . . . 13
Lubricate the Air Motor (Model 236629 Only). . . 13
Clean the Air Intake Check Valve. . . . . . . . . . . . 13
Correct a Bad Suction Line Seal . . . . . . . . . . . . 14
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Remove the Siphon and Helix Tubes. . . . . . . . . 15
Remove the Drive Belt . . . . . . . . . . . . . . . . . . . . 16
Assemble the Agitator . . . . . . . . . . . . . . . . . . . . 17
Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Model 236629 Standard Agitator . . . . . . . . . . . . 18
Model 236760 Oil-less Reversible Agitator . . . . 18
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Technical Specifications . . . . . . . . . . . . . . . . . . . . 21
California Proposition 65 . . . . . . . . . . . . . . . . . . . . 21
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 22
Models
Part Series Description
236629 C Standard Agitator, 0.75 HP (0.55 kW)
236760 C Oil-less Reversible Agitator, 0.75 HP (0.55 kW)

Warnings
308345T 3
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The
exclamation point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks.
When these symbols appear in the body of this manual or on warning labels, refer back to these Warnings.
Product-specific hazard symbols and warnings not covered in this section may appear throughout the body of this
manual where applicable.
WARNING
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. Paint or solvent
flowing through the equipment can cause static sparking. To help prevent fire and explosion:
• Use equipment only in well-ventilated area.
• Eliminate all ignition sources, such as pilot lights, cigarettes, portable electric lamps, and plastic drop
cloths (potential static sparking).
• Ground all equipment in the work area. See Grounding instructions.
• Never spray or flush solvent at high pressure.
• Keep work area free of debris, including solvent, rags and gasoline.
• Do not plug or unplug power cords, or turn power or light switches on or off when flammable fumes
are present.
• Use only grounded hoses.
• Hold gun firmly to side of grounded pail when triggering into pail. Do not use pail liners unless they
are anti-static or conductive.
•Stop operation immediately ifstaticsparkingoccursoryoufeelashock.Donotuseequipmentuntil
you identify and correct the problem.
• Keep a working fire extinguisher in the work area.
MOVING PARTS HAZARD
Moving parts can pinch, cut or amputate fingers and other body parts.
• Keep clear of moving parts.
• Do not operate equipment with protective guards or covers removed.
• Do not wear loose clothing, jewelry or long hair while operating equipment.
• Equipment can start without warning. Before checking, moving, or servicing equipment, follow the
Pressure Relief Procedure and disconnect all power sources.
SPECIAL CONDITIONS FOR SAFE USE
• Electrostatic charging hazard. Clean surfaces with a damp cloth and read instructions for additional
techniques to mitigate risk of electrostatic discharge.
• TheAmbientTemperatureRangeofeachagitatordependsontheairmotorincludedintheassembly.
Refer to Models and Technical Specifications in Instruction manual for additional information.

Warnings
4308345T
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not exceed the maximum working pressure or temperature rating of the lowest rated system
component. See Technical Specifications in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical
Specifications in all equipment manuals. Read fluid and solvent manufacturer’s warnings. For
complete information about your material, request Safety Data Sheets (SDSs) from distributor or
retailer.
• Do not leave the work area while equipment is energized or under pressure.
• Turn off all equipment and follow the Pressure Relief Procedure when equipment is not in use.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine
manufacturer’s replacement parts only.
• Do not alter ormodify equipment. Alterations or modifications may void agency approvals and create
safety hazards.
• Make sure all equipment is rated and approved for the environment in which you are using it.
• Use equipment only for its intended purpose. Call your distributor for information.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not kink or over bend hoses or use hoses to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or
swallowed.
• Read Safety Data Sheets (SDSs) to know the specific hazards of the fluids you are using.
• Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.
PERSONAL PROTECTIVE EQUIPMENT
Wear appropriate protective equipment when in the work area to help prevent serious injury, including
eye injury, hearing loss, inhalation of toxic fumes, and burns. Protective equipment includes but is not
limited to:
• Protective eyewear, and hearing protection.
• Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufacturer.
WARNING

Component Identification
308345T 5
Component Identification
The Twistork Helix Agitator is intended to mix and
maintain paints and similar fluids in closed-head,
55-gallon (200-liter) drums with 2 in. npt bung
connections. The Twistork Helix Agitator provides
suction porting through its siphon tube, which allows you
to siphon fluid to a pump while mixing it.
Standard Agitator, Model 236629
The standard agitator operates in a center-lift fluid
rotation mode, which is preferred in most applications
because it minimizes fluid aeration. The helix rotates
counterclockwise and mixes fluid by lifting it up from the
bottom of the drum. See FIG. 1.
Standard agitator Model 236629 cannot reverse its
helix rotation.
FIG. 1: Model 236629: Standard (counterclockwise)
Rotation
Oil-less Reversible Agitator,
Model 236760
The oil-less reversible agitator operates the same as the
standard agitator,but it uses a non-lubricated air supply,
and the helix rotation can be reversed.
NOTE: Although the air motor can operate without oil,
motor life is increased when lubrication is provided.
To reverse the helix rotation on reversible agitator Model
236760, remove the air motor muffler (16a) and needle
valve (18), and switch the ports they are installed into.
See FIG. 2.
When the helix rotation is reversed, the agitator
operates in a pull-down fluid rotation mode, which can
be better for agitating fluids that are difficult to put into
suspension. The helix rotates clockwise and mixes fluid
by pulling it down from the surface. See FIG. 2.
With clockwise (pull-down fluid rotation), care must be
used at high speeds to prevent cavitation, which could
be caused by air being drawn down to the siphon inlet.
FIG. 2: Model 236760: Reversed (clockwise) Rotation
16a
18
18
16a

Installation
6308345T
Installation
Key:
SV: Bleed-type air shutoff valve
AF: Air line filter
AR: Air regulator and gauge
AL: Air line lubricator
AM: Agitator motor
MT: Mix tank (reference only)
Grounding
Check your local electrical code for detailed grounding
instructions for your area and type of equipment.
To ground the Twistork Helix agitator, connect the
ground wire (H) to the grounding lug (J) on the collar.
Connect the grounding wire clamp to a true earth
ground. See FIG. 4.
Order part number 222011, ground wire and clamp.
FIG. 4: Ground the Agitator
To reduce the risk of fire and explosion, always
maintain a minimum of 1 in. (25.4 mm) clearance
between rotating agitator parts and container to
prevent sparks from contact.
FIG. 3: Typical Installation
AM
SV
AL
MT
AR
AF
The equipment must be grounded to reduce the risk
of static sparking. Static sparking can cause fumes to
ignite or explode. To reduce the risk of static sparking,
all electrically conductive objects or devices in the
spray area must be properly grounded.
NOTICE
The bearing nut (8) is made of acetal, which is not
compatible with some of the solvents used in paints or
coatings and is not compatible with acidic fluids and
will be damaged by them. Order part number 189660,
optional Rulon®bearing nut. Check your material data
sheet and/or supplier for compatibility.
J
H

Installation
308345T 7
FIG. 5: Install Flexible Suction Hose
Air Line Accessories
A bleed-type air shutoff valve (SV) is required; it isolates
the air line components for servicing. The air shutoff
valve should be installed in the supply line and can be
used to stop and start the agitator. If the valve is used to
stop and start the agitator, you do not need to set the
agitator speed each time it is used.
Order air shutoff valves by the part numbers listed
below:
110223 1/4” npt(f) x 1/4” npt(f)
110224 3/8” npt(f) x 3/8” npt(f)
113333 3/8” npt(m) x 3/8” npt(f)
The following air line accessorieshelp to increase motor
life and ease of operation.
Air Line Filter
Air line filters remove harmful dirt and moisture from the
air supply. Order one of the following:
106148 3/8 npt(f) air line filter
106149 1/2 npt(f) air line filter
Air Line Lubricator (for Model 236629 only)
Downstream from the filter, install an air line lubricator
for automatic air motor lubrication. Set the lubricator
feed rate at 1 drop of oil per minute for high speed or
continuous duty usage. Do not overfeed oil or exhaust
air may become contaminated. To manually lubricate
the air motor, see Lubricate the Air Motor
(Model 236629 Only), page 13. Order one of the
following:
214847 3/8 npt(f) air line lubricator
214848 1/2 npt(f) air line lubricator
Air Line Quick-Disconnect
Install an air line quick-disconnect (F) or bleed-type air
shutoff valve at the air inlet (D). See FIG. 6. Order one of
the following:
169969 1/8 npt(m) air line quick-disconnect
208536 1/4 npt(f) air line quick-disconnect
NOTICE
To avoid damaging the agitator, do not mount the pump
(G) directly to the agitator outlet fitting (41). Make sure
the pump is properly supported, and install a flexible
suction hose (E) between the agitator outlet fitting and
the pump, as shown in FIG. 5.
G
E
41
NOTICE
Not lubricating the air motor will cause air motor failure.

Installation
8308345T
Install the Agitator
The agitator weighs 24 lb (11 kg). To manually lift it in
and out of the drum, grasp the housing (3), and guide
the helix tube (7) through the drum bung. See FIG. 6.
Order part number 189658, accessory handle, to
connect a lift hook to raise and lower the agitator or
hang the agitator to store it.
1. Hold the agitator by the housing (3) or by the
accessory handle. Lower the helix tube (7) through
the bung using a turning motion until the siphon
tube rests on the bottom of the drum.
NOTE: The tube must rest on the bottom to
evacuate the maximum amount of material from the
drum and to stabilize the agitator.
2. Make sure the gasket (46) is in place, screw the
bung adapter (44) into the bung, and tighten the
bung adapter. See FIG. 6.
3. Make sure the o-ring (20) is in place inside the
lock-ring (45), then tighten the lock-ring (45).
NOTE: To keepthe helix tube pointedstraightdown,
make sure the bung adapter (44) and lock ring (45)
are tight.
4. Position the air motor so the air line (C) can be
attached to the inlet (D) on the needle valve without
obstructing any other system components.
5. When using the agitator suction feature, connect
a suction hose (E) between the agitator fluid outlet
fitting (41) and the pump. See FIG. 6. The hose
connector must have a 30° bevel to match the fluid
outlet fitting with an airtight seal. See Maximum
Siphon Flow Rate, page 9.
When not using the siphon feature, plug the fluid
outlet fitting (41) to prevent excess fluid evaporation.
The air motor exhaust can be piped out as follows:
Remove the air motor muffler (16a), and connect an
exhaust line to the exhaust port.
NOTE: Model 236629 has a 1/4 npt(f) exhaust port.
Model 236760 has a 3/8 npt(f) exhaust port.
FIG. 6: Agitator
NOTICE
To avoid damaging the siphon tube, lower the agitator
to the drum bottom; do not drop it.
Do not install the agitator without the bearing nut (8) in
place. See FIG. 7. If the bearing nut is not installed, the
siphon tube (4) and helix tube (7) will rub against each
other during operation and cause damage. Replace the
bearing nut if damaged or worn.
Model 236629 shown
E41
16a
C
3
45
20
44
46 7
F
D

Operation
308345T 9
Operation
Find the Proper Agitator Speed
NOTE: Attach ground wire before using agitator.
1. Fill the fluid supply container to about 3–4 inches (75–
100 mm) above the agitator blade.
2. Start the agitator, and gradually increase the speed by
turning the needle valve (14) until a vortex begins to
form in the paint.
3. Reduce the speed slightly, then fill the fluid
container. Use the lowest agitator speed needed for
thorough agitation of the paint. Excessive agitator
speed may cause the paint to foam.
Pressure Relief Procedure
1. Close the bleed-type air shutoff valve (SV) to relieve
pressure to the air motor.
2. Disconnect the air line.
Maximum Siphon Flow Rate
The volume of fluid that can be siphoned through the
agitator inlet is determined by the viscosity of the fluid.
• The maximum flow rate is approximately 12 gpm (45
lpm) with 100-centipoise fluid.
• The maximum flow rate is approximately 1.2 gpm
(4.5 lpm) with much heavier 1000-centipoise fluid.
To prevent pump cavitation, avoid flow rates higher than
these. Check the fluid periodically for signs of cavitation.
Air Requirements
For continuous use, the 0.75 HP air motor typically
requires 2.5 scfm (0.071 m3/min.) of air at 400 rpm or
5.7 scfm (0.162 m3/min.) of air at 800 rpm.
Nitrogen Charge the Drum
Operate the Agitator
See FIG. 7.
The bearing nut (8) helps prevent excessive fluid flow
between the siphon tube (4) and helix tube (7), but it is
not intended to be a complete seal. Fluids can pass
through the bearing nut into the gap between the two
tubes. Before you change colors or coatings or store the
agitator, clean the fluid tubes. See Clean the Fluid
Tubes, page 12.
NOTE: Thoroughly agitate the fluid before you use the
suction feature. Agitating maximizes fluid quality and
helps avoid solids getting drawn into the siphon tube
and clogging it. Order part number 236984, strainer inlet
Moving parts, such as an impeller blade, can cut or
amputate fingers. To reduce the risk of serious injury,
always shut off the agitator and disconnect the air line
before moving, checking, or repairing the agitator.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
splashing fluid and moving parts, follow the Pressure
Relief Procedure before cleaning, checking, or
servicing the equipment.
NOTICE
If you are using nitrogen to charge the drum, use a
maximum of 0.25 psi (1.7 kPa, 0.02 bar). Such low
pressure requires special regulation equipment. Use a
passive, non-pressurized system when possible.
Higher pressure could push fluid through the shaft seal
(21) and into the top bearings (11), damaging them.
See Parts, page 18.

Operation
10 308345T
kit, to help prevent thick sediment from being forced into
the siphon inlet.
NOTE: If you install an air shutoff valve, the same
agitator speed is set each time it is turned on without
requiring repeated needle valve adjustments.
You can also use an air line quick-disconnect (F) as a
shutoff. See FIG. 6. See Air Line Quick-Disconnect,
page 7.
FIG. 7: Operate the Agitator
Shutdown Procedure
1. To stop the agitator, close the needle valve (18), or
disconnect the quick-disconnect (F), or close the air
valve in the air supply line.
2. Follow the Pressure Relief Procedure, page 9.
3. If you remove the agitator from the drum, remove
the bearing nut (8), and hang or tilt the agitator
upright over a container to allow it to drain. Order
part number 189658, accessory handle, so you can
connect a lift hook to raise and lower the agitator or
hang the agitator to store it.
Do not let fluid dry in the fluid tubes. See Clean the
Fluid Tubes, page 12.
NOTICE
Do not operate the agitator at a high speed for a long
period of time. Excessive agitator speed can cause the
fluid to foam and can cause vibration and increased
wear on parts and damage to the drum bung. Only
agitate the fluid fast enough to maintain even mixing.
You can view fluid movement through the 0.75-in. port
on the drum cover.
Model 236629 shown 18
F
7
8
4
NOTICE
Keep the agitator upright. Do not lay it on its side or
upside down, because fluid might flow into the beltdrive
area causing damage.
If you use the accessory agitator handle, make sure the
agitator is loosened from the drum before you raise it
with a lift. The handle will not support the weight of the
drum.

Maintenance
308345T 11
Maintenance
Flush the Air Motor
If the air motor is sluggish or inefficient, follow this
procedure.
The recommended solvent for air motors and lubricated
pumps is Gast®Flushing Solvent (Gast part number
AH255 or AH255A) or Inhibisol®Safety Solvent.
1. Disconnect the air line and muffler (16a).See Parts,
page 18.
2. Add several teaspoons of solvent, or spray the
solvent directly into the motor.
3. Rotate the shaft by hand in both directions for a few
minutes.
4. Reconnect the air line, and slowly increase the air
pressure until there is not trace of solvent in the
exhaust air.
5. Re-lubricate the motor with a squirt of lightweight oil
in the chamber.
Prolong the Life of the
Bearing Nut
• Replace the bearing nut (8) if it is damaged or worn.
• Do not allow fluids to dry out in the fluid section. Dry
fluid will adhere to the bearing nut (8) and could
destroy it the next time you start the agitator. Flush
the fluid section before you change colors or
coatings or store the agitator.
• Do not operate the agitator without fluid in the drum
as this can cause excessive bearing nut (8) wear.
Do not use kerosene or other flammable solvents to
flush the air motor. Flushing with flammable solvents
could cause fire or explosion and result in serious
injury or property damage.
Hazardous fluids or toxic fumes can cause serious
injury or death if splashed in the eyes or on the skin,
swallowed, or inhaled. When flushing the air motor:
• Perform the procedure in a well ventilated area.
• Keep your face away from the exhaust port.
• Wear the appropriate protective clothing, gloves,
eyewear, and respirator.
NOTICE
Use a compatible solvent to clean parts. The bearing
nut (8) is made of acetal, which is not compatible with
acidic fluids and will be damaged by them. Check your
material data sheet and/or supplier for compatibility.
Avoid getting any solvent on the air motor belt.

Maintenance
12 308345T
Clean the Fluid Tubes
To prevent fluid from drying on the tubes and interfering
with helix rotation, clean the siphon tube (4) and helix
tube (7) when you change colors or coatings and when
the agitator is removed from the drum long enough for
the fluid to dry. Also, clean the fluid tubes for periodic
maintenance as follows:
1. Remove the bearing nut (8). See FIG. 8.
2. Remove the two diagonal socket-head screws (24)
and lockwashers (25) protruding from the top of the
siphon cover (6).
3. Remove the siphon tube (4) as follows:
a. Rest the agitator on its side on the drive belt
housing so the inlet is lower than the outlet. This
orientation prevents fluid from running into the
bearing and drive belt area.
b. Pull up on the fluid outlet fitting (41) to remove
the siphon tube (4).
4. Clean the siphon tube (4), helix tube (7), and
bearing nut (8). The inside diameter of the tubes
can be cleaned by pulling a solvent-soaked rag
through them.
NOTE: After you mix or pump catalyzed materials
that could set up between the tubes without air,
always remove the siphon tube, and clean both
tubes.
5. Apply PTFE spray lubricant to the siphon tube (4)
inlet end only. Install the siphon tube through the top
of the agitator housing (3). Lubricant must have an
auto-ignition rating of 482°F (250°C) or greater.
6. Install the two socket-head screws (24) and
lockwashers (25) into the top of the siphon cover
(6). Torque the screws oppositely and evenly to 60
to 70 in-lbs (6.8 to 7.9 N•m).
7. Apply PTFE spray lubricant to the inside lip of the
bearing nut (8), and tighten it onto the helix tube (7).
Torque oppositely and evenly to 60 to 70 in-lbs
(6.8 to 7.9 N•m).
1
2
Torque oppositely and evenly to 80 to 100 in-lbs
(9 to 11.3 N•m).
Apply PTFE spray lubricant to inside lip of bearing nut
before you install it.
3
Apply PTFE spray lubricant to the siphon tube (4) inlet
end before you install it.
4
FIG. 8: Apply PFTE Spray Lubricant
Model 236629 shown
24
1
25
41
24
2
5
6
4
16a
18
33
4
7
8
3
3

Maintenance
308345T 13
Agitator Blades
Regularly check the agitator for dried material buildup.
Clean using a rag soaked in solvent that is compatible
with the spray material and the surfaces being cleaned.
Additionally, extra precautions need to be taken if using
lower conductive materials (<1000 pS/m) such as:
• Avoid stirring/mixing at high speeds.
• Avoid insoluble mixtures.
• When possible, increase the material conductivity
with additives.
• Use liquids with a high conductivity (>1000 pS/m)
Lubricate the Air Motor
(Model 236629 Only)
If an air line lubricator (AL) is not installed, the air motor
must be manually lubricated every 8 hours. Lubricate
the agitator air motor by placing 10 - 20 drops of SAE
#10 light oil in the motor's air inlet. Oil must have an
auto-ignition rating of (482°F) 250°C or greater. Run the
agitator for about 30 seconds.
Clean the Air Intake Check Valve
The air intake check valve (33) allows make-up air to
enter the closed drum as fluid is drawn out through the
agitator outlet port. See FIG. 8. The air intake check
valve should be inspected and cleaned every 2000
operating hours or when there are any signs of the drum
beginning to collapse as fluid is drawn out.
Pump priming problems can indicate a plugged air
intake check valve. Paint overspray in the air can be
drawn into the valve and cause the ball to stick in the
closed position.
To clean the air intake check valve
1. Remove the seat (33) and ball (34). See Parts,
page 18.
2. Clean the parts with compatible solvent, and
reassemble the valve.
3. Insert the ball (34), and tighten seat (33) until just
snug.
NOTE: The seat should not be flush with the elbow (32).
Installing the seat too tightly could jam the ball against
the seat.
Materials can become electrostatically charged when
stirred or blended. To prevent fire and explosion,
ground equipment and do not allow material buildup
on the agitator. Dried material could allow static build
up and interfere with grounding.
NOTICE
Not lubricating the air motor will cause air motor failure.

Maintenance
14 308345T
Correct a Bad Suction Line Seal
Air that is pulled into the suction line makes the pump
inefficient. This can happen for the following reasons:
• Cavitation is occurring because the pump or helix is
going too fast.
• Siphon hose connection is leaking.
• Nylon rings (22) are not sealing. See FIG. 9.
To correct the problem (see FIG. 9):
1. Torque the four socket-head screws (24) in the
siphon fitting (5) oppositely and evenly to 80 to 100
in-lbs (9.0 to 11.3 N•m).
NOTE: If Step 1 does not correct the problem,
continue with Steps 2 through 5.
2. Replace the rings (22). Make sure the outer lips face
up, as shown in FIG. 9.
3. Insert the inlet tube (4) into the bottom of the siphon
fitting (5).
4. Tap the bottom of the inlet tube (4) to make sure the
tube passes through the rings (22) and seats on the
siphon fitting (5).
5. Torque the four socket-head screws (24) in the
siphon fitting (5) oppositely and evenly to 80 to 100
in-lbs (9.0 to 11.3 N•m).
FIG. 9: Correct a Bad Suction Line
Torque screws oppositely and evenly to 80 to 100 in-lbs (9.0 to 11.3 N•m).
1
2
Install with outer lips facing up.
5
24
1
22
2
4

Service
308345T 15
Service
If the unit requires more than installation of a service kit,
it is usually quickest and easiest to send the unit to the
Graco distributor for repair or replacement.
• If the vanes need replacing, or foreign material is
present in the motor chamber, an experienced
mechanic may remove the end plate opposite the
drive shaft end.
• New vanes should have the edges with cut corners
(or the notched edges, if the vanes are reversible)
pointing toward the bottom of the vane slot.
Remove the Siphon and Helix
Tubes
1. Remove the bearing nut (8). See FIG. 10.
2. Remove the two diagonal socket-head screws (24)
and lockwashers (25) protruding from the top of the
siphon cover (6).
3. Remove the siphon tube (4) as follows:
a. Rest the agitator on its side on the drive belt
housing so the inletis lower than the outlet. This
orientation prevents fluid from running into the
bearing and drive belt area.
b. Pull up on the fluid outlet fitting (41) to remove
the siphon tube (4).
4. Remove the three hex-head screws (14a) from the
bushing (14), and install the screws into the
bushing's threaded holes as shown in Detail A of
FIG. 10. Tighten the screws evenly to loosen the
bushing from the helix tube (7).
5. Pull the helix tube (7) through the bottom of the
agitator housing (3).
Moving parts, such as an impeller blade, can cut or
amputate fingers. To reduce the risk of serious injury,
always shut off the agitator and disconnect the air line
before moving, checking, or repairing the agitator.
NOTICE
Do not pry with a screwdriver. It will dent the surface of
the plate and body, causing leaks. Use a puller tool,
which will remove the end plate while maintaining the
position of the shaft.

Service
16 308345T
FIG. 10: Siphon and Helix Tubes
Remove the Drive Belt
Replace the drive belt (15) if it is cracked or worn.
1. Remove the siphon tube (4) and helix tube (7) as
instructed above.
2. Remove the eight screws (27) and the drive belt
cover (2). See FIG. 11.
3. Remove the three hex-head screws (14a) and the
bushing (14).
4. Slide the drive belt (15) over the smaller pulley (12).
Then remove the larger pulley (13) and the drive
belt (15) as shown in FIG. 11. Belt must have no
tension after installation.
FIG. 11: Drive Belt
Torque oppositely and evenly to 60 to 70 in-lb (6.8 to
7.9 N•m).
1
2
Apply PTFE spray lubricant to inside lip of bearing nut before
you install it.
Apply PTFE spray lubricant to siphon tube (4) inlet end and
to top 6 in. (150 mm) of helix tube before you install them.
3
Detail A
14a
14
24 41
6
25
4
35 14
7 Ref
3
B
8
7
Detail B
1
3
Model 236629 shown
2
3
To avoid static electricity buildup and possible
sparking, which could cause fire and explosion,
replace the drive belt with a genuine ESD rated and
marked belt only. Order part number 112552.
With helix tube (7) flush with top of bushing (14),
torque the screws oppositely and evenly to 55 to
60 in-lbs (6.2 to 6.8 N•m).
1
2
Model 236629 shown
14a
14
13
15
12 227
1
2
Replace with a genuine ESD rated and marked
belt only.

Service
308345T 17
Assemble the Agitator
1. Make sure the spacer (10) is in place (see Parts,
page 18). With its larger-I.D. taper facing up, install
the larger pulley (13) and the drive belt (15) through
the agitator housing. See FIG. 11.
2. Slide the other end of the drive belt over the smaller
pulley (12). The drive belt should not be tight after it
is installed. Make sure the pulleys are aligned, then
secure the small pulley (12) by tightening its
setscrew. Torque setscrew to 45 to 55 in- lbs (5.1 to
6.2 N•m).
3. Place the bushing (14) into the larger pulley (13).
4. Install the screws (14a) in the non-threaded holes in
the bushing (14); do not tighten the screws yet.
5. Place the installation tool (B) on the end of the helix
tube. See FIG. 10.
NOTE: The installation tool (B) is included with
236762, shaft seal kit
6. Apply PTFE spray lubricant to the top 6 in. (150
mm) of the helix tube (7). While holding the pulley
(13) down, push the helix tube and tool (B) up
through the bottom of the agitator housing (3) until
the tube is flush with the top of the bushing (14).
Then remove the installation tool.
Wedge a screwdriver blade into the gap of the
bushing (14) to spread the bushing while inserting
tube (7).
7. Torque the three hex-head screws (14a) oppositely
and evenly to 55 to 60 in-lbs (6.2 to 6.8 N•m). See
FIG. 11.
8. Install the thrust washer (35) flush to the bushing
(14) as shown in Detail B of FIG. 10.
9. Secure the drive belt cover (2) with the eight screws
(27).
10. Apply PTFE spray lubricant to the siphon tube (4)
inlet end only. Install the siphon tube through the top
of the agitator housing (3). See FIG. 10.
11. Install the two socket-head screws (24) and lock-
washers (25) into the top of the siphon cover (6).
Torque the screws oppositely and evenly to 60 to 70
in-lbs (6.8 to 7.9 N•m).
NOTE: The helix tube (7) should move up and down
about 0.05 inch (1.3 mm). If it does not, the bearings
(11) are not fully seated. Push the bearings in until
they are fully seated. See Parts, page 18 for the
location of the bearings.
12. Apply PTFE spray lubricant to the inside lip of the
bearing nut (8), and tighten it onto the helix tube (7).
NOTICE
Use the installation tool (B) to insert the helix tube (7)
through the shaft seal (21) without damaging the seal
lip. See FIG. 10. See Parts, page 18, for the location of
the seal.

Parts
18 308345T
Parts
Model 236629 Standard Agitator
Model 236760 Oil-less Reversible Agitator
11
24
25
24
25
4
27
41
5
22
6
3
3932
34
33
50
45
20
44
46
7
Press into place; lips face down.
Apply high-strength thread sealant to
threads.
Apply anaerobic PTFE pipe sealant to
threads.
With helix tube (7) flush with top of
bushing (14), torque oppositely and evenly
to 55 to 60 in-lbs (6.2 to 6.8 N•m).
Tighten after you align pulleys (12 and 13).
Torque setscrew to 45 to 55 in- lbs (5.1 to
6.2 N•m).
Drive belt must not be tight after it is
installed.
Bend washer tab up to lock.
Apply PTFE spray lubricant to inside lip of
bearing nut before you install it.
Torque oppositely and evenly to 80 to 100
in-lbs (9 to 11.3 N•m).
Torque oppositely and evenly to 60 to 70
in-lbs (6.8 to 7.9 N•m).
Apply PTFE spray lubricant to siphon tube
(4) inlet end and to top 6 in. (150 mm) of
helix tube (7) before you install them.
Install flush with top of nut (8), and torque
to 40 to 45 in-lb (4.5 to 5.1 N•m).
Install with outer lips facing up. See FIG. 9
on page 14.
1
2
3
4
5
6
7
8
9
10
11
12
13
12
12a
27
1
30 26
18
16a
51
16 or 17
15
28
29
31
35
14
13
14a
30
10
21
11
9
11
2
8
56
3
3
3
3
See detail
1
3
3
2
4
Needle Valve (Ref. 18) Detail
51
3
18e18f 18d 18a 18b 18c
Includes items 18a to 18e
10
9
13
7
5
6
12
8
11

Parts
308345T 19
Model 236629 Standard Agitator
Includes items 1 to 16 and 18 to 50, 57–58
Model 236760 Oil-less Reversible Agitator
Includes items 1 to 15 and 17 to 58
* A repair kit is available. Order Repair Kit 207335 for
standard air motor (Part No. 101140).
** A repair kit is available. Order Repair Kit 236996 for
reversible oil-less air motor (Part No. 112723). You
must also order two adapters (Part No. 159841), to
adapt the needle valve and muffler.
^ This part is included in Repair Kit 236762, which may
be purchased separately. The kit also includes an
installation tool, which is needed to insert the helix
tube through the shaft seal without damaging the seal
lip.
‡An optional Rulon bearing nut is available. Order part
number 189660.
Keep these spare parts on hand to reduce down time.
Replacement safety labels, tags, and cards are
available at no cost.
Ref. Part No. Description Qty.
1 236720 BRACKET 1
2 189648 COVER, belt drive 1
3 189649 HOUSING, agitator 1
4 189651 TUBE, siphon 1
5 189653 FITTING, siphon 1
6 189654 COVER, siphon 1
7 236719 TUBE, helix 1
8‡ 189655 NUT, bearing; acetal AF 1
9 189656 SPACER, bearing 1
10 189657 SPACER, pulley 1
11 112548 BEARING, ball 2
12 112549 PULLEY (small), drive Includes
item 12a 1
12a — SETSCREW,pulley;belt,1/4x 20
x 3/16 in. (not a replacement part) 1
13 112550 PULLEY (large), drive belt 1
14 112551 BUSHING, QD taper lock;
includes items 14a 1
14a — SCREW, hex head; #10- 24 x 1
in. (not a replacement part) 3
15112552 BELT, drive; ESD rated / marked 1
16* 101140 AIR MOTOR, standard; 0.75 HP.
Model 236629 only. Includes item
16a
1
16a 113779 MUFFLER, exhaust; 1/4 npt 1
17** 112723 AIR MOTOR, reversible, oil-less;
0.75 HP Model 236760 only;
Includes item 16a
1
18 206264 Valve, needle
Includes items 18a to 18f
1
18a 166529 VALVE, needle 1
18b 166532 NUT, packing 1
18c 164698 KNOB, adjusting 1
18d 157628 O- RING, packing 1
18e 165722 BODY, valve 1
18f 166531 WASHER 1
20112553 O-RING; PTFE 1
21^112555 SEAL, shaft; graphite-filled PTFE 1
22195045 RING, seal, tube support; Nylon 3
24 112556 SCREW, socket-head; M6 x 16 8
25 108050 LOCKWASHER, spring; M6 8
26 112557 SCREW, set; M6 1
27 106084 SCREW, pan-head; M5 x 10 10
28 104029 LUG, grounding 1
29 104582 WASHER, tab 1
30 105332 LOCK NUT, hex 3
31 100718 LOCKWASHER; #10 1
32 100839 ELBOW, street; 1/8 npt 1
33 189659 SEAT, check valve 1
34 105691 BALL; 1/4 in. diameter; SST 1
35 189662 WASHER, thrust 1
41 112572 UNION, swivel; 90°1
44 178575 ADAPTER, bung 1
45 178576 RETAINER, o-ring 1
46106537 GASKET; polyethylene 1
50 189650 TUBE, housing 1
51 159841 ADAPTER; 3/8 npt(m) x
1/4 npt(f); Model 236760 only 2
56 110980 CLAMP, hose Model 236760 only 1
5717P806 KIT, safety tag (not shown) 1
5816A614 LABEL, notice (not shown) 1
Ref. Part No. Description Qty.

Dimensions
20 308345T
Dimensions
7.4 in. (18.8 cm)
48.6 in. (123.4 cm)
32 in. (81.3 cm) minimum
35-1/8 in. (89.2 cm) maximum
3/4- 14 npt(f) fluid outlet
1/8 npt(f)
air inlet
2 npt
bung adapter
NOTE: The bung adapter
adjusts the depth of the
agitator to a minimum of 32 in.
(81.3 cm) and a maximum of
35-1/8 in. (89.2 cm).