Graco Music Mixer 24C728 B User Manual

Instructions/Parts  
AEIRxDRpIVEaN nding Blade Mixer  
313643G  
EN  
Expanding blade bung-mounted agitator for maintaining suspension and even mixing in  
industrial paints and coatings. For professional use only.  
Not approved for use in European explosive atmosphere locations.  
Model 24C728, Series B  
Low Viscosity, up to 1000 centipoise  
Model 24C729, Series B  
High Viscosity, up to 2000 centipoise  
100 psi (0.7 MPa, 7 bar) Maximum Working Pressure  
Important Safety Instructions  
Read all warnings and instructions in this manual.  
Save these instructions.  
Contents  
ti14646A  
 
Warnings  
313643G  
3
 
Installation  
Installation  
NOTE: Reference numbers and letters in parentheses in  
the text refer to the callouts in the figures and in the  
parts drawing.  
Air Line Accessories  
Install the following accessories in the order shown in  
FIG. 2, using adapters as necessary.  
Grounding  
Bleed-type master air valve (A): to isolate the air line  
components for servicing.  
Air filter (B): removes harmful dirt and moisture from  
the compressed air supply. Order part 106148 for  
3/8 npt or 106149 for 1/2 npt.  
The equipment must be grounded. Grounding reduces  
the risk of static and electric shock by providing an  
escape wire for the electrical current due to static build  
up or in the event of a short circuit.  
Air regulator and gauge (C): to control air motor and  
agitator speed.  
See FIG. 1. Loosen the grounding screw (GS). Insert  
one end of a 12 ga. minimum ground wire behind the  
grounding screw and tighten the screw securely.  
Connect ground clamp to a true earth ground. A ground  
wire and clamp, Part 238909, is available from Graco.  
Air line lubricator (D): Downstream from the filter,  
install an air line lubricator for automatic air motor lubri-  
cation. 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, page 6. A 3/8 in. npt air line lubricator, Part  
214847, is available from Graco.  
NOTICE  
Not lubricating the air motor will cause air motor failure.  
E
GS  
ti14647a  
FIG. 1. Ground Screw  
C
A
B
D
Air Requirements  
F
To help prevent component rupture, do not exceed  
100 psi (0.7 MPa, 7 bar) maximum air working  
pressure.  
ti14648a  
FIG. 2. Typical Installation  
Key:  
Typical air requirements for continuous use at 400 rpm  
and 100 psi (0.7 MPa, 7 bar) inlet pressure:  
A
B
C
D
E
F
Bleed-type master air valve  
Air filter  
Air regulator and gauge  
Air line lubricator  
Agitator motor  
Mix tank (reference only)  
3
low viscosity air motor -- 12 scfm (0.34 m /min)  
3
high viscosity air motor -- 22 scfm (0.62 m /min)  
4
313643G  
 
       
Installation  
Install the Agitator  
NOTICE  
Keep the agitator tightly mounted to the drum bung  
to prevent damage to the threads from vibration.  
When using a modified drum, check that there is no  
interference between the base of the drum and the  
shaft of the agitator to prevent blade or shaft dam-  
age and to avoid sparks from contact (see Warning  
Always maintain a minimum of 1 in. (25.4 mm) clear-  
ance between rotating agitator parts and container to  
prevent sparks from contact.  
1. Due to variability in drum heights the lowest set of  
blades may contact the bottom of the drum. If the  
bung adapter will not fully seat, or if resistance is felt  
when installing the agitator, move the blades up the  
shaft. To move the blades, loosen the setscrew on  
the hub and slide the assembly up or down to the  
desired position. The setscrew must always remain  
on the top, with the blades hanging down, so the  
blades will pass into and out of the bung hole.  
3. Position the air motor so the air line can be attached  
easily to the needle valve’s 1/8 npt inlet, without  
obstructing any other system components.  
4. Attach an air line quick disconnect valve or ball  
valve for main air shutoff. Order Part 208536,  
Coupler, and Part 169969, fitting.  
5. Attach the air line between the needle valve’s  
1/8 npt inlet and the 1/8 npt air supply manifold  
outlet.  
To avoid personal injury, never operate the agitator  
outside of a drum.  
Angled Adaptor  
If the agitator is used on a drum with an off-center bung  
and the blades would contact the side of the drum, the  
angled adaptor must be used to avoid this contact.  
1. Thread the locking ring onto the angled adaptor by  
hand, as far as it will go.  
2. Thread the angled adaptor into the bung until it bot-  
toms out, then back it out until the widest portion on  
of the adaptor top is pointing just to the left of the  
center of the drum (Fig. 4).  
3. Turn down the locking ring until it contacts the drum.  
Use an appropriately sized pipe wrench or adjust-  
able wrench to tighten the adaptor down until the  
widest portion of the adaptor top is in line with the  
drum.  
ti14650a  
FIG. 3. Adjust Location of Hub/Blade Assemblies  
2. To install the agitator on the container cover, drop  
the folding blade sections through the drum bung  
hole, then screw the bung adapter into the bung  
hole. See Dimensions, page 9.  
Adaptor  
ti16998a  
FIG. 4. Angled Adaptor  
313643G  
5
 
 
Operation  
Operation  
5. To stop the agitator, close the air valve in the air  
supply line (if you have one), or close the agitator  
needle valve (11).  
Pressure Relief Procedure  
Check Fluid Viscosity  
If the agitator is in a closed drum, remove the agitator to  
check fluid viscosity or siphon some fluid from the  
3/4 npt drum port.  
1. Turn off the air regulator and close main air shutoff  
valve.  
Maintenance  
2. Disconnect the air line from the motor air inlet.  
Lubricate the Air Motor  
Operate the Agitator  
1. Fill the fluid supply container.  
2. Start the agitator and run it slowly.  
NOTICE  
Not lubricating the air motor will cause air motor failure.  
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 10 to 20 drops of SAE #10  
lightweight oil in the motor’s air inlet. Run the agitator for  
about 30 seconds.  
3. Use the needle valve (11) to regulate the agitator  
speed. Set the agitator at a speed that minimizes  
vibration.  
NOTE: If an air shutoff valve is installed in the supply  
line and used to stop the agitator, the same agitator  
speed will be set each time the agitator is used. Part  
numbers for Graco air shutoff valves are listed below:  
Air Shutoff Valve  
Part  
Description  
1/4 npt(m) x 1/4 npt(m)  
208390  
208391  
208392  
208393  
3/8 npt(m) x 3/8 npt (f)  
3/8 npt(f) x 1/4 npt(m)  
3/8 npt(m) x 3/8 npt (m)  
4. Operate the agitator continuously while supplying  
paints or other fluids to the system.  
NOTICE  
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 agitate the fluid  
only enough to maintain even mixing.  
6
313643G  
 
       
Repair  
Repair  
Shaft and Agitator Blades  
1. Remove the shaft (2) from the drum. Clean with a  
compatible solvent and inspect the shaft (2) and  
blades (6, 7) for wear or damage.  
Flush the Air Motor  
If the motor is sluggish or inefficient, flush it with  
non-flammable solvent in a well-ventilated area.  
2. If parts need replacing, follow steps 1-4 under Air  
Motor to remove the air motor.  
3. Use the 1/8 hex to remove the other two setscrews  
(8) on the coupler.  
1. Follow the Pressure Relief Procedure. See  
page 6.  
4. Slide the shaft off (2).  
2. Add several teaspoons of solvent, or spray the sol-  
vent directly into the motor.  
5. If needed, use a 3 mm (1/8 in.) hex to remove the  
setscrew (8) on the hub assembly (6 or 7). Slide the  
hub/blade assembly off of the shaft.  
3. Rotate the shaft by hand in both directions for a few  
minutes.  
6. To install a new hub/blade assembly, slide it onto the  
shaft. The setscrew must always remain on the top,  
with the blades hanging down, so the blades will  
pass into and out of the bung hole.  
4. Reconnect the air line and slowly apply pressure  
until there is no trace of solvent in the exhaust air.  
5. Lubricate the motor with a squirt of lightweight oil in  
the chamber.  
NOTE: Air Motor Repair Kits are available. Order Part  
207335 for Model 24C728 (low viscosity) or Part 224954  
for Model 24C729 (high viscosity).  
Service  
Reassembly  
Air Motor  
1. Slide the shaft (2) into the coupler (3). Use a 1/8 hex  
to tighten the setscrews (8). Torque to 65 in-lb  
(7.3 N•m).  
1. To remove the air motor for service, use a 3/16 hex  
to remove the three setscrews (9) on the bung  
adapter (4).  
2. Raise the bung adapter (4) on the shaft (2) to recon-  
nect to the air motor. Use a 3/16 hex to tighten the  
three setscrews (9) on the bung adapter. Torque to  
80 in-lb (9 N•m).  
2. Lower the adapter (4) on the shaft (2) so coupler (3)  
is accessible.  
3. Use a 1/8 hex to remove the top two setscrews (8)  
on the coupler (3).  
4. Lift the air motor (1) straight up off the coupler (3).  
If the air motor (1) requires more than installation of  
a service kit, it is usually quickest and easiest to  
send it to the Graco distributor for repair or replace-  
ment.  
If the air motor blades need replacing or foreign  
material is present in the motor chamber, an experi-  
enced mechanic may remove the end plate opposite  
the drive shaft end. 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.  
313643G  
7
 
   
Parts  
Parts  
1
2
Torque to 65 in-lb (7.3 N•m)  
Torque to 80 in-lb (9 N•m)  
2
12  
1
1
8
7
11  
13  
16  
4
9
2
1
15  
3
8
7
6
ti14649a  
8
313643G  
 
 
Parts  
Part No/Description  
Ref.  
No. Part No. Description  
Qty.  
1*  
MOTOR, air  
Low Viscosity (Model 24C728)  
High Viscosity (Model 24C729)  
1
1/8 npt  
16A871  
111310  
2
3
16A867 SHAFT, drive  
24D686 COUPLER, agitator; includes 4 set-  
screws (Item 8)  
1
1
A
4
24D687 ADAPTER, bung, double; includes  
3 setscrews (Item 9) and ground  
screw (Item 15)  
24C861 HUB, assembly, with 3.5 in. blades;  
includes setscrew (Item 8)  
24C860 HUB, assembly, with 2.5 in. blades;  
includes setscrew (Item 8)  
102207 SETSCREW, 1/4-20, sst (included  
with Items 3, 6, and 7)  
1
B
2 in.  
npsm  
6
7
8
9
1
2
7
3
1-1/2 in.  
npsm  
101679 SETSCREW, 3/8-24, sst (included  
with Item 4)  
11  
12  
13  
15  
16  
17  
18  
206264 VALVE, needle  
169969 FITTING, air line  
113779 MUFFLER  
116343 GROUND SCREW  
113082 O-RING  
16H294 ADAPTOR, angled (not shown)  
16H295 RING, locking (not shown)  
1
1
1
1
1
1
1
*
Air Motor Repair Kits may be purchased separately.  
Order Kit 207335 for Model 24C728 (low viscosity) or  
Kit 224954 for Model 24C729 (high viscosity).  
C
E
D
F
Dimensions  
2 in. Bung Adapter  
Model 24C728  
(low viscosity)  
Model 24C729  
(high viscosity)  
Dimension  
A
4.2 in. (107 mm)  
5.1 in. (130 mm)  
C (Minimum)  
29.8 in. (757 mm) 29.8 in. (757 mm)  
D (Maximum) 32.8 in. (832 mm) 32.8 in. (832 mm)  
1-1/2 in. Bung Adapter  
Model 24C728  
(low viscosity)  
Model 24C729  
(high viscosity)  
Dimension  
B
5.2 in. (132 mm) 6.1 in. (155 mm)  
28.8 in. (730 mm) 28.8 in. (730 mm)  
31.8 in. (807 mm) 31.8 in. (807 mm)  
E (Minimum)  
F (Maximum)  
ti14646a  
313643G  
9
 
 
Technical Data  
Technical Data  
Maximum working pressure  
100 psi (0.70 MPa, 7.0 bar)  
Maximum recommended agitator speed . . . . . . . . . . . . . 500 rpm  
Air consumption at 400 rpm with 100 psi (0.7 MPa, 7 bar)  
air inlet pressure  
3
Model 24C728 (low viscosity) . . . . . . . . . . . . . . . . . .  
Model 24C729 (high viscosity). . . . . . . . . . . . . . . . . .  
12 scfm (0.34 m /min)  
3
22 scfm (0.62 m /min)  
Noise Level at 100 psi (0.7 MPa, 7 bar), maximum load*  
Model 24C728 (low viscosity)  
Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.32 dB  
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 dB  
Model 24C729 (high viscosity)  
Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75.74 dB  
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.32 dB  
Wetted Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303, 18-8, and 304 stainless steel  
Bung adapter thread sizes . . . . . . . . . . . . . . . . . . . . . . . . 1 1/2-11.5 npsm and 2-11.5 npsm  
Weight  
Model 24C728 (low viscosity) . . . . . . . . . . . . . . . . . . 9.6 lb (4.4 kg)  
Model 24C729 (high viscosity). . . . . . . . . . . . . . . . . . 13.1 lb (5.9 kg)  
* Tested in water to ISO 9614-2.  
10  
313643G  
 
 
Technical Data  
313643G  
11  
 
Graco Standard Warranty  
Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in  
material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty  
published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by  
Graco to be defective. This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco’s written  
recommendations.  
This warranty does not cover, and Graco shall not be liable for general wear and tear, or 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 of Graco equipment with  
structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, installation, 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 claimed defect. 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.  
THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED  
TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.  
Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other remedy  
(including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any other incidental or  
consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the date of sale.  
GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A  
PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS SOLD BUT NOT  
MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors, 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.  
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment hereunder, or  
the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract, breach of warranty, the  
negligence of Graco, or otherwise.  
FOR GRACO CANADA CUSTOMERS  
The Parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings entered into,  
given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties reconnaissent avoir convenu que la  
rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures judiciaires exécutés, donnés ou intentés, à la suite  
de ou en rapport, directement ou indirectement, avec les procédures concernées.  
Graco Information  
TO PLACE AN ORDER, contact your Graco distributor or call to identify the nearest distributor.  
Phone: 612-623-6921 or Toll Free: 1-800-328-0211 Fax: 612-378-3505  
All written and visual data contained in this document reflects the latest product information available at the time of publication.  
Graco reserves the right to make changes at any time without notice.  
Original instructions. This manual contains English. MM 313643  
Graco Headquarters: Minneapolis  
International Offices: Belgium, China, Japan, Korea  
GRACO INC. AND SUBSIDIARIES • P.O. BOX 1441 • MINNEAPOLIS MN 55440-1441 • USA  
Copyright 2009, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.  
Revised December 2012  
 
   

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