Marshalltown 300DD User manual

1 of 14
WS1732
8-2018/Rev.A
Includes Model Number 300DD & 300DD-PL
3 Cubic Foot Direct Drive Mixer
104 S. 8th Ave.
Marshalltown, IA
Phone [phone]
Fax [phone]
www.MARSHALLTOWN.com

2 of 14
104 S. 8th Ave. Marshalltown, IA Phone [phone] • Fax [phone] www. MARSHALLTOWN .com
WS1732
8-2018/Rev.A

3 of 14
104 S. 8th Ave. Marshalltown, IA Phone [phone] • Fax [phone] www. MARSHALLTOWN .com
WS1732
8-2018/Rev.A
INTRODUCTION
TABLE OF CONTENTS
Safety Precautions ................................................................................................………………………………….3-4
Safety Decals ............................................................................................................................................................4
Warranty ...............................................................................................................……………………………………. 5
Product Operation ....................................................................................................................………………………6
Parts Breakdown ................................................................................................................................................7-13
This owner’s manual provides the information needed to operate and maintain MARSHALLTOWN’s 300DD & 300DD-PL
Mixers. Carefully read and follow all safety and operating instructions in this manual. Also, be sure every operator of this
mixer reads this manual before operating the mixer. The replacement of any part on this mixer by parts other than the
manufacturer’s authorized replacement parts may adversely affect the performance, durability, warranty or safety of the
product.
Be sure safety precautions are observed. Read and follow all safety and operating instructions in this operator’s manual.
The manufacturer reserves the right to make changes on, or add improvements to its product at any time without prior
notice or obligation. The manufacturer reserves the right to decide, upon its sole discretion and at any time, to discontinue a
product.
SAFETY PRECAUTIONS
This is the industry’s safety alert symbol. This symbol calls attention to items or operations that could be dangerous. This
symbol can be found throughout this manual and on safety decals on the mixer. Read these messages carefully.
THE FOLLOWING PRECAUTIONS ARE SUGGESTED TO HELP PREVENT ACCIDENTS. A CAREFUL
OPERATOR IS THE BEST OPERATOR. MOST ACCIDENTS CAN BE AVOIDED BY OBSERVING
CERTAIN PRECAUTIONS. READ AND TAKE THE FOLLOWING PRECAUTIONS BEFORE OPERATING
THIS EQUIPMENT TO HELP PREVENT ACCIDENTS. EQUIPMENT SHOULD BE OPERATED ONLY BY
THOSE WHO ARE RESPONSIBLE AND INSTRUCTED TO DO SO.
1. Read all operating and maintenance instructions before operating or servicing mixer. Test run empty prior to actual use.
2. A mixer is only as safe as its operator. Give complete and undivided attention to the operation of the mixer.
3. Know how to stop the mixer and the motor instantly.
4. Always have all guards and safety devices attached and in place before operating mixer.
5. Keep inexperienced and unauthorized people away from the mixer at all times.
6. Never leave the mixer unattended while it is running.
7. Shut off motor or disconnect it before making any adjustments or putting hands or tools in the drum.

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104 S. 8th Ave. Marshalltown, IA Phone [phone] • Fax [phone] www. MARSHALLTOWN .com
WS1732
8-2018/Rev.A
SAFETY PRECAUTIONS CONTINUED
Never reach into the drum or place tools into the drum while the mixer is running
8. Do not overfill the drum. Do not exceed the mixer’s rated capacity.
9. Use a grounded three wire plug-in for all mixers using an electric motor.
10. Keep the mixer in good operating condition. Loose or damaged parts are dangerous.
11. Avoid loose clothing that could get caught in moving parts or on control levers.
Keep hands and feet away from moving parts
12. Do not add material to the drum while stopped. Start the drum before adding material.
13. Keep all warning, caution and safety instruction labels in good condition. Replace missing, damaged or illegible labels.
14. Clear the work area around the machine to prevent tripping or falling onto the mixer.
15. Operate on level ground to prevent the mixer from tipping over.
16. DO NOT OPERATE this mixer under the influence of alcohol or while taking medication that impairs your reactions.
17. Do not pull the cord to disconnect it. Keep the cord away from heat, oil, and sharp edges.
18. Use factory authorized parts for replacement.
19. Wear safety glasses when mixer is in use.
20. Never attempt to move the mixer while the motor is on.
21. With electric motors, properly grounded electric circuit is required to protect the operator from possible electric shock.
NEVER unplug the motor while standing in or around wet ground.
WS1734WS1068
SAFETY DECALS (if applicable)
If your safety and operating decals are damaged, they can be replaced by contacting Customer Service at 800-888-0127 or
MARSHALLTOWN.com
DANGER!
WARNING!
WARNING!

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104 S. 8th Ave. Marshalltown, IA Phone [phone] • Fax [phone] www. MARSHALLTOWN .com
WS1732
8-2018/Rev.A
MIXERS ONE-YEAR WARRANTY
This product is warranted to the original purchaser only, to be free of defects in material and workmanship under normal
use, for one year from purchase date. MARSHALLTOWN shall without charge for parts and labor, repair or replace such
parts which are found to be defective. All transportation charges for replacement parts must be borne by the purchaser.
For warranty service, the product must be delivered, with proof of purchase date, to the dealer of original purchase, or any
factory authorized service dealer.
If difficulty is encountered in having warranty work performed, contact the Customer Service Department.
All implied warranties, including those of merchantability and fitness for a particular purpose, are limited to one year from
date of purchase by the original retail customer and to the extent permitted by law any and all implied warranties are
excluded and disclaimed after the expiration of such period.
Some states do not allow limitations on how long an implied warranty lasts, or the exclusion or limitations of incidental or
consequential damages, so the above limitations or exclusions may not apply to you. This warranty gives you specific legal
rights, and you may also have other rights, which vary from state to state.
Exclusion from this warranty:
1. All consequential damages, including pickup and delivery of the unit, communication, mileage charges and/or
rental of a replacement unit during repairs are not covered under this warranty, nor are any loss of income and/or
other loss resulting from the failure of the product to function due to a warranty defect.
2. This warranty will not apply when the product becomes inoperative due to misuse, normal wear, neglect,
improper maintenance, accident or freight damage, has not been operated and maintained in accordance
with the instructions furnished in the Operator’s Manual, or has been altered or modified without approval
from the Customer Service Department.
3. No parts or products are to be returned to the factory without prior written approval from the factory.
NOTICE: Record the model and serial numbers in the spaces provided.
Product Model Number: ______________________________________________
Product Serial Number: _______________________________________________
Motor Model Number: _________________________________________
Motor Code Number: __________________________________________
Purchase Date: ______________________________________________________
Dealer Purchased From: ______________________________________________
Dealer Address: ______________________________________________________
____________________________________________________________________
Dealer Phone Number: ________________________________________________

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104 S. 8th Ave. Marshalltown, IA Phone [phone] • Fax [phone] www. MARSHALLTOWN .com
WS1732
8-2018/Rev.A
PRIOR TO START UP
1. Examine the mixer carefully to make sure there was no damage during shipment or since the last use. Report any
damage immediately to the transportation company. Repair any damage before using the mixer.
2. Check for free rotation of the mixer drum yoke by rotating the drum through one complete dump-charge-dump cycle.
Make sure no foreign objects or tools are in the drum before starting the motor.
3. Start the motor and check for smooth operation of the drum.
STORAGE
For short term storage, clean the mixer and store in a dry place. If the mixer is not to be used for an extended period of
time, service mixer completely and store it in a dry place.
1. Refer to motor instructions for storage instructions.
2. Cover exposed metal surfaces with a thin coat of SAE 30 engine oil.
GETTING READY FOR MIXING
Lay out forms for your concrete floor, patio, driveway, sidewalk, etc. The quality of concrete is directly related to the quality of
the cement paste. Calculate the proportions of your mix components (cement, sand and coarse aggregate) according to the
job specifications.
LOADING THE MIXER
Start the mixer. Refer to motor instructions. After drum has started rotating, pour about half of the water in the drum.
NOTE: The drum may leak slightly when first used. This will stop after a few batches. Add aggregate (gravel) first then
cement second and sand last. Then add remaining water as needed.
MIXING INSTRUCTIONS
1. Tip and lock the drum in inclined position.
2. Start the drum rotating.
3. Add
1/2water.
4. Add cement and one shovelful of coarse aggregate. The coarse aggregate will break up any lumps in the cement.
5. Add remaining aggregate: crushed stone, pit-run gravel or sand.
6. Add remaining water as needed.
7. Mix batch for approximately one minute. Drum speed should be about 25 r.p.m. (NOTE: Mixing times may vary slightly.)
UNLOADING THE MIXER
Allow the entire mixture to mix for one full minute. Do not stop mixer from rotating.
Hold the tilt handle and unlock the tilt lock pin. Dump concrete to discharge side.
(NOTE: Mixing times may vary slightly.)
EXTENSION CORDS-ELECTRIC MOTOR
The following size extension cords should be used for this mixer: length of cord, up to 100 ft-14 gauge wire; up to 200 ft-12
gauge wire; up to 300 ft – 10 gauge wire; up to 400 ft – 8 gauge wire.
CARE OF MIXER
It is important to keep the inside of the mixing drum free of hardened concrete. After discharging the last batch of concrete
each day, add a pailful of water and two shovelfuls of gravel to the drum. This will scour the inside of the drum. Mix for
about two minutes, discharge and rinse the drum with water. Never permit concrete to harden on either the inside or outside
of drum.

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104 S. 8th Ave. Marshalltown, IA Phone [phone] • Fax [phone] www. MARSHALLTOWN .com
WS1732
8-2018/Rev.A
DESCRIPTIONFILE NAMEQTY.DET.
FRAME, LOWER, 300DD-PC-BLACKR0375.iam21
FRAME, SIDE, 300DD-PC-BLACKR0376.iam22
MOTOR, 1/2HP, LEESONWX2233.ipt13
GEARBOX, GROVE 525 SERIESWX2234.iam14
MOTOR MOUNT, 300DD-PC-BLACKR0377.iam15
TOP BRACKET, 300DD-PC-BLACKR0378.iam26
SASH, 300DD-PC-BLACKR0379.iam17
YOKE WELDMENT, 300DD-PC-BLACKR0381.iam18
BUSHING, POLYMER IGUSWR1249.ipt49
PIN, CLEVIS 1"WR1250.ipt210
RADIAL BEARING, 1.25"WX2238.ipt211
GRIPWL251.ipt112
SCREW, 5/16-18 X 1-3/4 RNDWR1256.ipt1513
WASHER, FLAT, 5/16 IDWR200.ipt2914
NUT HEX 5_16 - 18WR149.ipt1715
BOLT, CARRIAGE 3/8-16 X 2.25WR1258.ipt416
HEX NUT, NYLON INSERT, 3/8-16 UNC, ZINC PLATEDWR263.ipt417
SCREW, 5/16-18 X 3 RNDWR1257.ipt218
HEX CAP SCREW, 3/8-16 X 1.25" ZNWR196.ipt419
TUBE CAP RECT 1.5 X 3 RC1530-1WL677.ipt220
DRUM WELDMENT, 300DD-PC-BLUER0380.iam121
WASHER, 1.312 ID X 2.75 ODWR1252.ipt322
WASHER, IGUS, 1.25 ID GTI-2034-01WR1253.ipt223
SNAP RING, 1-1/4' SHAFTWR1254.ipt124
Clevis Pins and Cotter Pins - Extended Prong Square Cut Type (Inch) - Cotter PinWR1255.ipt425
WIRE HARNESS, F/ELECTRIC MODELWX1388.ipt128
CONNECTOR NUTWX1800.ipt329
ENCLOSURE, SK-13WX2247.iam130
SPRING, CONICALWR1261.ipt131
SWITCH, ON/OFFWX2248.ipt132
CABLE GLANDWR1260.ipt333
300UT BLADEWX1598.ipt235
3/8-16 X 3/4 CARRIAGE BOLTwr1011.ipt436
HEX NUT-FLANGE, 3/8-16WR531.ipt437
DECAL - 300DD MODEL FLAGWS1733.ipt139
DECAL - SAFETY AND OPERATING INSTRUCTIONSWS1734.ipt140
OPERATOR'S GUIDE AND PARTS MANUALWS1732.ipt141
PAINTED HAND TOW WELDMENTR0383.iam142
WHEEL 10 x 2.75WX1124.ipt244
HANDLE HAND TOW, 300DD-PC-BLACKR0384.iam145
TILT LOCK PINR5663.ipt148
FLAT WASHER, 5/8"WR1240.ipt149
NUT, 5/8-11 THIN NYLOCKWR1274.ipt150
TOW KIT HAND GRIPWT923.ipt151
QLT ADJ. BULL FLOAT BRACKET SNAP CLIPWT173.ipt152
CORD-POWER 16-3x12"WX1378.ipt153
HAND TOW FOOT, 300DD-PC-BLACKR0382.iam254
SCREW, SELF-DRILLING #8 X 3/4 HEX HEADWR1273.ipt255
LABEL - BLANK LABEL, 2.5" X 1"WS1302.ipt156
MODEL/SERIAL PLATEWS229.ipt157
RIVET, ABL42 ALUM/STEEL MARSON BLINDWR412.ipt458
BAG - 8" X 12" PLASTICWS932.ipt159
WASHER, EPDM RUBBER SEALING, 0.355" ID X 0.625" ODWR1322.ipt460
1/4" X 1-3/4" L SQUARE KEYWR1162.ipt161
THIS PRINT DISCLOSES SUBJECT MATTER IN WHICH MARSHALLTOWN COMPANY HAS PROPRIETARY RIGHTS. THE RECEIPT OR
POSSESSION OF THIS PRINT DOES NOT CONFER, TRANSFER OR LICENSE THE USE OF THE DESIGN OR TECHNICAL INFORMATION SHOWN
HEREIN. REPRODUCTION OF THIS PRINT OR ANY INFORMATION CONTAINED HEREIN OR MANUFACTURE OF ANY ARTICLE HEREFROM,
FOR DISCLOSURE TO OTHERS, IS FORBIDDEN, EXCEPT BY SPECIAL WRITTEN PERMISSION FROM MARSHALLTOWN COMPANY.
HEAT-TREAT
MATERIAL
APVD.
BY
DATE
CK.
BY
DWN.
BY
DATE DATE
REV.DRAWING NO.
OF
NO.
PART
MACH. NO.
FIXT. NO.NO.
E.D.I. SCALE
DIE NO.
GA. NO.
SHEET
TITLE:
REV. REVISION DESCRIPTION DATE APVD
#
C
UNLESS OTHERWISE SPECIFIED:
ALL DIMENSIONS ARE IN INCHES [MILLIMETERS]
GENERAL UNSPECIFIED TOLERANCES
SUPPLIER VERIFICATION IS
REQUIRED PRIOR TO APPROVAL
CRITICAL DIMENSION / NOTE
FRACTION:
 .5
ANGLE:
 1/32
°
 XXXX
 XX
 XXX
 .020
DECIMAL: in. [mm]
 .010
 .005
 .0005
 - [.5]
 X
-
[.013]
[.12]
[.25]
X
27956
MANUAL -
1 2
-
rstone
3/20/2018
C:\Vault Local\Public\Product\27956 MANUAL.idw
V6
44
25
42
14
15
14
13
18
52 15
14
14
51
45
REF # NAME PART# QTY
1FLAT WASHER, 5/16" * 12
2 HEX NUT, 5/16"-18 * 9
3 SNAP CLIP FOR HANDLE WT173 1
4 TOW HANDLE (does not include grip or snap clip) R0384 1
5 HAND GRIP WT923 1
6 WHEEL/TIRE MIX5290 2
7 FLAT ROUND HEAD SCREW, 5/16"-18 X 1-3/4 * 8
8 FLAT ROUND HEAD SCREW, 5/16"-18 X 3 * 1
9 FOOT CHANNEL R0382 2
10 COTTER PIN * 2
11 PAINTED HAND TOW FRAME R0383 1
TOW KIT EDI# 27961
5
4
71
1
2
8
9
1
3
1
2
11
10
6
1
2
7
*Kits are sold with the parts listed in the table, common hardware is not sold separately and can be picked up at a local hardware store.

8 of 14
104 S. 8th Ave. Marshalltown, IA Phone [phone] • Fax [phone] www. MARSHALLTOWN .com
WS1732
8-2018/Rev.A
DESCRIPTIONFILE NAMEQTY.DET.
FRAME, LOWER, 300DD-PC-BLACKR0375.iam21
FRAME, SIDE, 300DD-PC-BLACKR0376.iam22
MOTOR, 1/2HP, LEESONWX2233.ipt13
GEARBOX, GROVEWX2234.ipt14
MOTOR MOUNT, 300DD-PC-BLACKR0377.iam15
TOP BRACKET, 300DD-PC-BLACKR0378.iam26
SASH, 300DD-PC-BLACKR0379.iam17
YOKE WELDMENT, 300DD-PC-BLACKR0381.iam18
BUSHING, POLYMER IGUSWR1249.ipt49
PIN, CLEVIS 1"WR1250.ipt210
RADIAL BEARING, 1.25"WX2238.ipt211
GRIPWL251.ipt112
SCREW, 5/16-18 X 1-3/4 RNDWR1256.ipt1513
WASHER, FLAT, 5/16 IDWR200.ipt2914
NUT HEX 5_16 - 18WR149.ipt1715
BOLT, CARRIAGE 3/8-16 X 2.25WR1258.ipt416
HEX NUT, NYLON INSERT, 3/8-16 UNC, ZINC PLATEDWR263.ipt417
SCREW, 5/16-18 X 3 RNDWR1257.ipt218
HEX CAP SCREW, 3/8-16 X 1.25" ZNWR196.ipt419
TUBE CAP RECT 1.5 X 3 RC1530-1WL677.ipt220
DRUM WELDMENT, 300DD-PC-BLUER0380.iam121
WASHER, 1.312 ID X 2.75 ODWR1252.ipt322
WASHER, IGUS, 1.25 ID GTI-2034-01WR1253.ipt223
SNAP RING, 1-1/4' SHAFTWR1254.ipt124
Clevis Pins and Cotter Pins - Extended Prong Square Cut Type (Inch) - Cotter PinWR1255.ipt425
WIRE HARNESS, F/ELECTRIC MODELWX1388.ipt128
CONNECTOR NUTWX1800.ipt329
ENCLOSURE, SK-13WX2247.iam130
SPRING, CONICALWR1261.ipt131
SWITCH, ON/OFFWX2248.ipt132
CABLE GLANDWR1260.ipt333
300UT BLADEWX1598.ipt235
3/8-16 X 3/4 CARRIAGE BOLTwr1011.ipt436
HEX NUT-FLANGE, 3/8-16WR531.ipt437
KEY, 5/16 X 1-3/4WR1251.ipt138
DECAL - 300DD MODEL FLAGWS1733.ipt139
DECAL - SAFETY AND OPERATING INSTRUCTIONSWS1734.ipt140
OPERATOR'S GUIDE AND PARTS MANUALWS1732.ipt141
PAINTED HAND TOW WELDMENTR0383.iam142
WHEEL 10 x 2.75WX1124.ipt244
HANDLE HAND TOW, 300DD-PC-BLACKR0384.iam145
TILT LOCK PINWX2274.ipt148
FLAT WASHER, 5/8"WR1240.ipt149
NUT, 5/8-11 THIN NYLOCKWR1274.ipt150
TOW KIT HAND GRIPWT923.ipt151
QLT ADJ. BULL FLOAT BRACKET SNAP CLIPWT173.ipt152
CORD-POWER 16-3x12"WX1378.ipt153
HAND TOW FOOT, 300DD-PC-BLACKR0382.iam254
SCREW, SELF-DRILLING #8 X 3/4 HEX HEADWR1273.ipt255
LABEL - BLANK LABEL, 2.5" X 1"WS1302.ipt156
MODEL/SERIAL PLATEWS229.ipt157
RIVET, ABL42 ALUM/STEEL MARSON BLINDWR412.ipt458
BAG - 8" X 12" PLASTICWS932.ipt159
WASHER, EPDM RUBBER SEALING, 0.355" ID X 0.625" ODWR1322.ipt460
THIS PRINT DISCLOSES SUBJECT MATTER IN WHICH MARSHALLTOWN COMPANY HAS PROPRIETARY RIGHTS. THE RECEIPT OR
POSSESSION OF THIS PRINT DOES NOT CONFER, TRANSFER OR LICENSE THE USE OF THE DESIGN OR TECHNICAL INFORMATION SHOWN
HEREIN. REPRODUCTION OF THIS PRINT OR ANY INFORMATION CONTAINED HEREIN OR MANUFACTURE OF ANY ARTICLE HEREFROM,
FOR DISCLOSURE TO OTHERS, IS FORBIDDEN, EXCEPT BY SPECIAL WRITTEN PERMISSION FROM MARSHALLTOWN COMPANY.
HEAT-TREAT
MATERIAL
APVD.
BY
DATE
CK.
BY
DWN.
BY
DATE DATE
REV.DRAWING NO.
OF
NO.
PART
MACH. NO.
FIXT. NO.NO.
E.D.I. SCALE
DIE NO.
GA. NO.
SHEET
TITLE:
REV. REVISION DESCRIPTION DATE APVD
#
C
UNLESS OTHERWISE SPECIFIED:
ALL DIMENSIONS ARE IN INCHES [MILLIMETERS]
GENERAL UNSPECIFIED TOLERANCES
SUPPLIER VERIFICATION IS
REQUIRED PRIOR TO APPROVAL
CRITICAL DIMENSION / NOTE
FRACTION:
.5
ANGLE: 1/32
°
XXXX
XX
XXX
.020
DECIMAL: in. [mm]
.010
.005
.0005
- [.5]
X
-
[.013]
[.12]
[.25]
X
27956
AARON
PG10A
-
1 2
-
rstone
3/20/2018
C:\Vault Local\Public\Product\27956 AARON PG10A.idw
V3
37
21
36
35
38
22
23
22
11
16
17
60
5
24 22
23
4
3
8
10
11
7
15
4
6
12
5
9
14
3
2
1
9
12
9
13

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104 S. 8th Ave. Marshalltown, IA Phone [phone] • Fax [phone] www. MARSHALLTOWN .com
WS1732
8-2018/Rev.A
REF # NAME QTY
1 MOTOR, 1/2 HP, LEESON 1
2 GEARBOX, GROVE 1
REF # NAME QTY
13 RADIAL BEARING 1
REF # NAME QTY
3 MOTOR MOUNT BRACKET 1
4 CARRIAGE BOLT, 3/8"-16 X 2 1/4" 4
5 LOCKING NYLON NUT, 3/8"-16 4
6RUBBER WASHER 4
REF # NAME QTY
9 WASHER, 1.312ID X 2.75OD 3
12 IGUS WASHER, 1 1/4" (GTI-2034-01) 2
13 RADIAL BEARING 1
14 1 1/4" EXTERNAL RETAINING SNAP RING 1
15 KEY STOCK, 5/16" SQUARE X 1 3/4" 1
REF # NAME PART# QTY
8 MIXER BLADE MIX19911 1
10 CARRIAGE BOLT, 3/8"-16 X 3/4" * 2
11 FLANGED HEX NUT, 3/8"-16 * 2
REF # NAME PART# QTY
6RUBBER WASHER * 4
7DRUM WELDMENT * 1
8 MIXER BLADE MIX19911 2
9 WASHER, 1.312ID X 2.75OD * 3
10 CARRIAGE BOLT, 3/8"-16 X 3/4" * 4
11 FLANGED HEX NUT, 3/8"-16 * 4
12 IGUS WASHER, 1 1/4" (GTI-2034-01) * 2
13 RADIAL BEARING * 2
14 1 1/4" EXTERNAL RETAINING SNAP RING * 1
15 KEY STOCK, 5/16" SQUARE X 1 3/4" * 1
MOTOR/GEARBOX KIT EDI# 27962
BEARING KIT EDI# 27971
MOTOR MOUNTING KIT EDI# 27963
WASHER/BEARING KIT EDI# 27969
BLADE KIT EDI# 27267
METAL DRUM KIT EDI# 27964
*Kits are sold with the parts listed in the table, common hardware is not sold separately and can be picked up at a local hardware store.
*Kits are sold with the parts listed in the table, common hardware is not sold separately and can be picked up at a local hardware store.

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104 S. 8th Ave. Marshalltown, IA Phone [phone] • Fax [phone] www. MARSHALLTOWN .com
WS1732
8-2018/Rev.A
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17
16
15
6
12
5
9
14
3
2
1
9
9
13
12
4