D300 MIXERS
ML - 134258
D300 MIXER
701 S. RIDGE AVENUE
TROY, OHIO 45374-0001
937 332-3000
www.hobartcorp.com
F34925 (June 2005)
Model D300 Mixer
© HOBART 2005
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Installation, Operation and Care of
MODEL D300 MIXERS
SAVE THESE INSTRUCTIONS
GENERAL
The D300 Mixer (30 quart) features a 3/4 horsepower motor, a timer and a #12 attachment hub as
standard equipment. The standard 30 quart mixer bowl can be equipped with a variety of agitators. A
20 quart bowl, bowl adapter and agitators are available options on the D300.
Bowl Guard is standard equipment on all D300 models.
Programmable Timer Controller is optional on D300 models.
These mixers can be ordered with deluxe finish, which includes a chrome plated transmission case,
base, bowl support and pedestal.
A variety of attachments and accessories are available for all mixers. These are described in a
separate
Use and Applications Handbook,
which is furnished with each mixer.
INSTALLATION
UNPACKING
Immediately after unpacking the mixer, check for possible shipping damage. If this machine is found
to be damaged, save the packaging material and contact the carrier within 15 days of delivery.
Prior to installation, have the electrical service tested to assure it agrees with the specifications on the
machine data plate.
LOCATION
Place the mixer in its operating location. There should be adequate space around the mixer for the user
to operate the controls and to install and remove bowls.
A Deck Plate Kit is available from Hobart and holes are provided in the base for permanent bolting to
the floor, although this is not necessary in normal installations. Four plastic plugs are supplied with the
mixer to plug these holes if they are not used.
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ELECTRICAL CONNECTION
WARNING: ELECTRICAL AND GROUNDING CONNECTION MUST COMPLY WITH THE
APPLICABLE PORTION OF THE NATIONAL ELECTRICAL CODE AND/OR OTHER LOCAL
ELECTRICAL CODES.
WARNING DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW
LOCKOUT / TAGOUT PROCEDURES.
ELECTRICAL DATA
Models Volts/Hz/Ph Rated Circuit Size Fuse Size* 60°C Copper Circuit Size Circuit Breaker** 60°C Copper
Amps (Amps) (Amps) Wire Size (Amps) (Amps) Wire Size
D300 115/60/1 11.6 15 15 14 20 20 12
D300 200/60/1 6.3 15 6 14 15 10 14
D300 230.60/1 5.8 15 6 14 15 10 14
D300 200/60/3 2.5 15 3 14 15 3 14
D300 230/60/3 2.0 15 3 14 15 3 14
D300 460/60/3 1.0 15 1 14 15 1 14
*Dual Element **Inverse Time
Time-Delay Fuse Circuit Breakers
Circuit size (Minimum) & Fuse/Circuit Breaker Size (Maximum) compiled in accordance with the National Electrical Code (ANSI/NFPA 70), 1993 Edition.
A hole for 3/4" trade size conduit is located at the bottom
of the pedestal (Fig. 1). Make electrical connections to
the pigtail leads per the wiring diagram supplied with the
mixer.
Fig. 1
Check Rotation (Three-Phase Machines Only)
Three-phase machines must be connected so the planetary rotates in the direction of the arrow on the
Drip Cup. To check rotation:
Set the gear shift lever on 1.
Apply power to the mixer, set the Electro-Mechanical Timer on HOLD or, if equipped with a
Programmable Timer Controller, set it on [ – – : – – ]. With the Bowl Support all the way up,
momentarily run the machine by pushing the START and then STOP buttons.
If rotation is incorrect, DISCONNECT ELECTRICAL POWER SUPPLY and interchange any two
of the incoming power supply leads.
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OPERATION
PL-40143-1
Start Button
Timer
Stop Button
Gear Shift Lever
WARNING: MOVING BEATER IN BOWL, KEEP HANDS, CLOTHING AND UTENSILS OUT
WHILE IN OPERATION. DO NOT USE WITHOUT INTERLOCKED GUARD.
Every D300 mixer is equipped with either an Electo-Mechanical Timer Control (described at the bottom
of this page) or a Programmable Timer Controller (described on pages 6 through 8). Also, become
familiar with the other operating parts (Fig. 2) and their functions, which are referenced throughout the
OPERATION section (pages 5 through 11).
The Bowl Guard must be in position or the mixer will not operate. Refer to page 10.
If the Bowl Support is not all the way up, the mixer will not operate unless the START button is held in.
Controls
Attachment Hub
Drip Cup
Bowl Guard
Agitator
Bowl Handle
Bowl Lift Handle
Alignment Pin
Bowl
Bowl Clamp
Bowl Support
Fig. 2
ELECTRO-MECHANICAL TIMER CONTROLS (WHEN EQUIPPED)
The START button is used to start the mixer.
The STOP button is used to stop the mixer.
The TIMER is used in conjunction with the START button
for timed mixing operations and will stop the mixer when a
preset time has elapsed.
For non-timed mixing — Set the timer on HOLD and
use the STOP button to stop the mixer.
PL-40132-1
Fig. 3
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PROGRAMMABLE TIMER CONTROLLER (WHEN EQUIPPED)
At Idle, the time display [ – – : – – ] shows that no time has been set (Fig. 4).
Gear
Shift
Lever
PL-56681
M/C
Indicator
3
2
STOP MIXER
BEFORE
CHANGING SPEEDS
P2
Key
P1
Key
1
TIMER CONTROLLER
P1
123 4
P2
TIME
M/C
START STOP
Start
Button
SAVE
CLEAR
Stop
Button
Time Display
Save Key
Clear key
Knob
Fig. 4
Timer Keys Programming Function (if the mixer is not mixing).
P1 Contains up to four preset times. Displays each preset time sequentially.
P2 Contains up to four additional preset times. Displays each preset time sequentially.
Knob Changes the time as indicated by the display.
Save Replaces the preset time with the indicated time.
Clear Returns to Idle from a programming function.
For Continuous Mixing
START and STOP buttons control mixing operation.
Beginning from the Idle display [ – – : – – ], press START to begin mixing. The M/C indicator will
be lit, and the total mixing time will be indicated (minutes and seconds).
Press STOP when mixing is done. The M/C indicator light goes off and the Idle display
[ – – : – – ] returns.
Using the Dial Timer to set the Mixing Time
Beginning from the Idle display [ – – : – – ], turn the KNOB to set the mixing time. The M/C indicator
will be lit.
START and STOP buttons control mixing operation.
Press START to begin mixing: The timer will count down from the set time to [ 00 : 00 ].
If STOP is pressed, both mixing and timer countdown will be interrupted. After pressing
STOP, press START to resume both mixing and timer countdown; or press CLEAR to return
to the Idle display.
When the timer reaches [ 00 : 00 ] the mixer stops, M/C indicator goes off, a beep tone sounds
for 2 seconds and the Idle display [ – – : – – ] returns.
– 6 –
Using the Preset Keys, P1 or P2, to Set the Mixing Time
Each preset key has four time settings. The indicator above the number 1, 2, 3 or 4 and the P1 or P2
indicator light identifies which preset time is being displayed. The chart below shows the default
settings; the next page shows how to revise these preset times. The Dial Timer KNOB can be used
to adjust the mixing time if the knob is turned prior to pressing START.
Beginning from the Idle display [ – – : – – ], press P1 or P2 to display the #1 preset
P1
mixing time. (Pressing P1 or P2 again will display the next preset time, etc.)
01:00
P2
1 2 3 4
PL-56682
Indicator above P1
and 1 indicates the
first preset time
contained in P1.
☛ The Dial Timer KNOB can adjust the time.
START and STOP buttons control mixing operation.
Press START to begin mixing: The timer will count down from the set time to
[ 00 : 00 ].
If STOP is pressed, both mixing and timer countdown will be interrupted. After
pressing STOP, press START to resume both mixing and timer countdown;
or, press CLEAR to return to the Idle display.
When the mixer is stopped, you may perform any appropriate task, such as the
following: Add ingredients, change speed, reset the timer, continue mixing or unload.
When the timer reaches [ 00 : 00 ], the mixer stops, a beep tone sounds for 2
seconds and the next preset mixing time displays. When the last preset time reaches
[ 00 : 00 ], the P1 or P2 indicator goes off and the Idle display [ – – : – – ] returns.
Repeat from
☛ for each preset time (1, 2, 3 and 4 contained in P1 or P2).
The timer reverts to the Factory-Programmed Preset Times after any power
interruption:
Factory-Programmed Preset Times
Preset Key Indicator
1234
P1 01:00 02:00 10:00 00:00
P2 02:00 01:00 05:00 03:00
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To Revise the Preset Mixing Times Contained in P1 or P2
Each preset key has four preset time settings. The indicator above the number 1, 2, 3 or 4 and the P1
or P2 indicator light identifies which preset time is being displayed.
Beginning from the Idle display [ – – : – – ], press P1 or P2 to display the #1 preset
P1
01:00
P2
1 2 3 4
PL-56682
Indicator above P1
and 1 indicates the
first preset time
contained in P1.
mixing time. (Pressing P1 or P2 again will display the next preset time, etc.)
☞ Turn the KNOB to change the time for the indicated preset.
• Press SAVE to retain the revised time and move to the next preset time.
Repeat from
Pressing CLEAR will retain the saved times and return to the Idle display
[ – – : – – ].
☞ for each preset time (1, 2, 3 and 4 contained in P1 or P2).
The timer reverts to the Factory-Programmed Preset Times after any power
interruption:
Factory-Programmed Preset Times
Preset Key Indicator
1234
P1 01:00 02:00 10:00 00:00
P2 02:00 01:00 05:00 03:00
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CHANGING SPEEDS
The GEAR SHIFT LEVER is used to change speeds. Always stop the mixer before changing speeds.
To change speeds, push the STOP button, move the gear shift lever to the desired speed and restart
the mixer by pushing the START button.
Mixer Speeds
Speed 1 (Low) — This speed is for heavy mixtures such as bread dough, heavy batters and potatoes.
Speed 2 (Medium) — This speed is for light dough which must rise quickly, cake batters and some
whipping operations.
Speed 3 (High) — This is a fast speed for light work, such as whipping cream, beating eggs and mixing
thin batters.
BOWL LIFT HANDLE
The BOWL LIFT HANDLE is used to raise and lower the bowl. To raise the bowl, rotate the Handle
downward; to lower the bowl, rotate the Handle upward.
MIXING
This section explains operation of the mixer and how to install bowls, agitators and attachments. A
separate
Use and Applications Handbook
is provided with the mixer, which contains information on
mixing procedures and outlines specific uses for agitators, attachments and accessories.
Bowl
New mixer bowls and agitators (beaters, whips and dough arms) should be thoroughly washed with hot
water and a mild soap solution, rinsed with either a mild soda or vinegar solution and thoroughly rinsed
with clear water BEFORE being used. This cleaning procedure should also be followed for bowls and
agitators before whipping egg whites or whole eggs.
The bowl must be installed before the agitator.
To install the bowl, fully lower the bowl support. Position the bowl so the alignment bracket on the back
of the bowl is in the bowl retainer on the bowl support and the alignment pins on the front of the bowl
support fit in the holes in the bowl. Lock the bowl in place by rotating the bowl clamps over the ears of
the bowl.
If a bowl adapter is required, install it on the bowl support as you would the bowl and then install the bowl
on the adapter.
Agitator
To install an agitator, the bowl must be installed and fully lowered. Place the agitator in the bowl, push
it up on the agitator shaft and turn it clockwise to seat the shaft pin in the slot of the agitator shank.
To Raise the Bowl While Mixing
To raise the bowl while the agitator is mixing the product (when required by recipe or when using the
Bowl Scraper Attachment), load ingredients, close wire cage assembly and select low speed. To begin
mixing, press and hold the Start button and then raise the bowl.
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Bowl Guard (Fig. 5)
The Wire Cage Assembly on the Bowl Guard can be rotated out of the way to add ingredients or to
access the bowl and agitator.
To Rotate the Wire Cage Assembly to the Rear
Push the Latch in to release the Centering Pin from the Centering Ramp. Note how the grooves on the
nylon Retainers allow the Wire Cage to ride around the circular Ridge of the planetary Drip Cup. The
Wire Cage can rotate 360° left or right. When the Wire Cage returns to the front and center position,
the Centering Pin is captured and held by the Centering Ramp, restricting rotation of the Wire Cage until
the Latch is pressed again.
The Wire Cage must be in the front-center position for the mixer to operate.
To Remove the Wire Cage Assembly for Cleaning
Lower the Bowl. Rotate the Wire Cage to the rear. Remove both Agitator and Bowl. Return the Wire
Cage to the front.
While holding the Wire Cage securely with both hands, use your thumb to push down on the Black
Release Knob. Lower and remove the Wire Cage. Wash it in a sink or dishwasher, rinse with clear water
and dry with a clean cloth.
The stainless steel Splash Guard can be wiped off or washed easily with a cloth or sponge and warm,
soapy water. Rinse with clear water. Dry with a clean cloth.
To Reinstall the Wire Cage Assembly
Hold the Wire Cage so its top ring is positioned around the planetary Drip Cup with the grooves in both
nylon Rear Retainers straddling the Ridge on the Drip Cup. Push in the Front-Center Retainer until it
stays in and so that its grooves also straddle the Ridge on the Drip Cup. The Wire Cage is properly
assembled when all three Retainers straddle the Ridge on the Drip Cup in the three opposed locations.
Rotate the Wire Cage out of the way to install or remove the Agitator and Bowl or to add ingredients.
Return the Wire Cage to its front and center position to operate the mixer.
WIRE CAGE ROTATED LEFT
LATCH
WIRE CAGE FRONT-CENTER POSITION
RIDGE ON DRIP CUP
CENTERING PIN
REAR RETAINER
SPLASH GUARD
CENTERING RAMP
FRONT-CENTER
RETAINER
BLACK RELEASE KNOB
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PL-40071-1
Fig. 5
Attachments
To install an attachment, loosen the attachment hub thumbscrew and remove the plug. Insert the
attachment into the attachment hub, making certain that the square shank of the attachment is in the
square driver of the mixer. Secure the attachment by tightening the thumbscrew.
Move the gear shift lever to the desired speed. With the bowl support all the way up and the wire cage
in the front-center position, start the mixer to operate the attachment.
The meat and food chopper attachment should be operated in second or third speed. If material in the
cylinder stalls the mixer, push the STOP button at once. DO NOT attempt to restart the mixer in a lower
speed — remove the adjusting ring, knife, plate and worm and clear any obstruction. THIS ATTACHMENT
MUST NOT BE USED TO CHOP BREAD CRUMBS.
NOTE: Do not use attachment hub while mixing.
Bowl Scraper Attachment
The Mixer Bowl Scraper Attachment (when ordered) is provided with a separate instruction manual
covering its installation, operation, use and care.
CLEANING
WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW
LOCKOUT / TAGOUT PROCEDURES.
The mixer should be thoroughly cleaned daily.
A flat scraper and a brush are furnished to aid in cleaning bowls and agitators. Bowls and agitators
should be removed and cleaned in a sink.
DO NOT use a hose to clean the mixer — it should be washed with a clean, damp cloth. The apron may
be removed by loosening the thumbscrews.
The base allows ample room for cleaning under the mixer.
The Drip Cup-Splash Guard (which is secured by three screws) should be removed periodically and
wiped clean.
For cleaning the Bowl Guard (including both Wire Cage Assembly and Splash Guard), refer to page 10.
MAINTENANCE
WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW
LOCKOUT / TAGOUT PROCEDURES.
LUBRICATION
Bowl Clamps
The bowl clamp area of the bowl support should be lubricated twice a year. Lightly coat with Lubriplate
630AA (supplied).
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Bowl Lift
The bowl lift mechanism should be lubricated twice a year. Loosen the knob and remove the bowl lift
access cover from the rear of the pedestal. Lightly coat moving parts (Fig. 6) with Lubriplate 630AA
(supplied). Replace access cover and tighten knob.
Bowl Lift Slideways
The slideways (Fig. 7) should be lubricated once each month. Remove the apron (secured by two
thumbscrews) from the front of the pedestal. Lightly coat both slideways with Lubriplate 630AA (supplied).
Replace the apron and thumbscrews.
Bowl Lift Mechanism
PL-40171-1
Fig. 6 Fig. 7
TROUBLESHOOTING
SYMPTOMS POSSIBLE CAUSES
Mixer will not start. 1. Gear shift lever between gears (not fully engaged).
2. Circuit protector in open position — check fuse or disconnect
switch.
3. Mixer or attachment overloaded.
4. Bowl not all the way up.
5. Wire Cage Assembly is not in the front-center position.
SERVICE
If service is needed on this equipment, contact your local Hobart Service Office.
Bowl Lift Slideways
PL-40170-1
FORM 34925 (June 2005) PRINTED IN U.S.A.
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