20 Quart MIXER
MODEL
L20 ML-104591
FORM 19467 Rev. A (11-96) Printed In U.S.A.
20 Quart MIXER
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Installation, Operation, and Care of
20 Quart MIXER
SA VE THESE INSTRUCTIONS
GENERAL
The 20 quart mixer has an electric motor, belt drive, and a #12 attachment hub. A 20 quart bowl, B-Flat
beater, and D wire whip are shipped as standard equipment. A 0 - 15 minute timer is optional.
Available attachments and accessories include the following: 9" vegetable slicer, VS9 dicer attachment,
power dicer attachment, meat chopper attachment, and splash cover. With the use of special agitators,
an optional 12 quart bowl may be used on the 20 quart mixer.
INSTALLATION
UNPACKING
Immediately after unpacking the mixer, check for possible shipping damage. If the mixer is found to
be damaged, save the packaging material and contact the carrier within 15 days of delivery.
Prior to installation, test the electrical service to assure that it agrees with the specifications on the
machine data plate.
LOCATION
Remove shipping bolts that attach the four legs to the base-frame of the carton.
A plastic boot is provided for the bottom of each leg; a plastic plug is provided for the top of each leg.
Assemble boots and plugs to the four legs.
Place the mixer on a suitable sturdy level surface. There should be adequate space around the mixer
for the user to operate the controls and install and remove bowls.
Holes are provided in the bottom of the legs to permanently secure the mixer to the countertop,
although this is not necessary in normal installations. If you decide to attach the mixer permanently,
use the holes in the bottoms of the legs (where the shipping bolts were removed), drill through the
plastic boots, and use suitable fasteners (not provided).
ELECTRICAL CONNECTIONS (Cord Connected Mixers)
WARNING: THE ELECTRICAL CORD ON THIS MACHINE IS EQUIPPED WITH A THREE-PRONGED
GROUNDING PLUG WHICH MUST BE CONNECTED TO A PROPERLY GROUNDED RECEPTACLE.
IF THE RECEPTACLE IS NOT THE PROPER GROUNDING TYPE, CONTACT AN ELECTRICIAN.
DO NOT REMOVE THE GROUNDING PRONG FROM THE PLUG.
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OPERATION
WARNING: MOVING BEATER IN BOWL. KEEP HANDS, CLOTHING, AND UTENSILS OUT WHILE
IN OPERATION, DO NOT USE WITHOUT INTERLOCKED GUARD.
CONTROLS (Fig. 1)
TIMER (Optional)
x
x
x
x
x
x
x
x
x
x
x
x
x
x
xxxx
x
x
x
x
3
2
1
STIR
SPEED SELECTOR
HANDLE
BOWL LIFT HANDLE
ATTACHMENT HUB
THUMB SCREW
BOWL GUARD
AGITATOR
BOWL CLAMP
ALIGNMENT PIN
STOP
START
BOWL LIFT SLIDEWAYS
BOWL SUPPORT
PL-52022
Fig. 1
Push-button START and STOP buttons control power to the mixer.
The Bowl Guard must be down or the mixer will not operate.
If the Bowl Support is not all the way up, the mixer will not operate unless the S
The TIMER (if equipped) is used in conjunction with the S
TART button for timed mixing operations and
TART button is held in.
will stop the mixer when the desired time has elapsed.
For non-timed mixing — Set the timer on H
The S
PEED SELECTOR HANDLE (Fig. 1) is used to change speeds. CAUTION: Change speeds ONLY
while the mixer is running. To change speeds, turn the mixer on and move the S
OLD and use the STOP button to turn the mixer off.
PEED SELECTOR HANDLE
to the desired speed.
S
TIR — The slowest speed, for heavy mixtures, bread dough, or incorporating ingredients.
Speed 1 (Low) — For light dough, heavy batters, or potatoes.
Speed 2 (Medium) — For cake batters or some whipping operations.
Speed 3 (High) — For light work, such as whipping cream, beating eggs, or mixing thin batters.
NOTE: Before completing a mixing job, always return to STIR speed to be ready to begin the next job.
The B
OWL LIFT HANDLE (Fig. 1) is used to raise and lower the bowl. To raise the bowl, rotate the handle
downward; rotating the handle upward lowers the bowl.
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MIXING
This section explains operation of the mixer and how to install bowls, agitators, and attachments.
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 B
EFORE being put into service. 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 (Fig. 1).
Position the bowl so the ball on the back of the bowl fits in the bowl retainer slot on the bowl support
and the alignment pins (Fig. 1) on the front of the bowl support fit in the holes on the side brackets of
the bowl. Lock the bowl in place by rotating the bowl clamps (Fig. 1) over the side brackets of the bowl.
Agitator
To install an agitator (Fig. 1), 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
Before adding ingredients, make sure the mixer is in S
is mixing the product (when required by recipe): Load the ingredients. To begin mixing, hold the S
TIR speed. To raise the bowl while the agitator
TART
button in; then raise the bowl.
Attachments
Available attachments and accessories include the following: 9" vegetable slicer, VS9 dicer attachment,
power dicer attachment, meat chopper attachment, and splash cover.
To install an attachment, loosen the thumb screw on the attachment hub (Fig. 1) 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 thumb screw.
NOTE: The attachment hub operates at a wide range of speeds (revolutions per minute). The high
speed of the attachment hub makes the Speed Drive attachment unnecessary. Therefore, the Speed
Drive Attachment MUST NOT BE USED on L20 mixers.
Start the mixer and move the gear shift lever to the desired speed to operate the attachment.
Shredding cheese on the 9" Vegetable Slicer should be limited to S
Any dicing jobs on the Power Dicer or VS9 Dicer Attachment should be limited to S
The meat and food chopper attachment should be operated in S
TIR or SPEED 1.
TIR or SPEED 1.
TIR. If material in the cylinder stalls the
mixer, stop the mixer at once. DO NOT attempt to restart the mixer — remove the adjusting ring, knife,
plate, and worm and clear the obstruction. THIS ATTACHMENT MUST NOT BE USED TO CHOP
BREAD CRUMBS.
The bowl scraper attachment is not available on L20 mixers.
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Mixer Capacity Chart — Model L20
Recommended Maximum Capacities
PRODUCT
AGITATORS SUITABLE
FOR OPERATION
L20
CAPACITY OF BOWL (QTS. LIQUID) 20
Egg Whites D 1 qt.
Mashed Potatoes B & C 15 lbs.
Mayonnaise (Qts. of Oil) B or C or D 10 qts.
Meringue (Qty. of Water) D 1.5 pts.
Waffle or Hot Cake Batter B 8 qts.
Whipped Cream D or C 4 qts.
Cake, Angel Food (8 -10 oz. cake) C 15
Cake, Box or Slab or Layer B or C 20 lbs.
Cake, Cup B or C 22 dz.
Cake, Pound B 21 lbs.
Cake, Short (Sponge) C 15 lbs.
Cake, Sponge C 12 lbs.
Cookies, Sugar B 15 lbs.
Dough, Bread or Roll (Lt.-Med.) 60% AR § ED 25 lbs.*
Dough, Heavy Bread 55 % AR § ED 15 lbs.*
Dough, Pie B & P 18 lbs.*
CAPACITIES —
SINGLE BATCH
Dough, Thin Pizza 40% AR (max. mix time 5 min.) § ED 9 lbs.*
Dough, Medium Pizza 50% AR § ED 10 lbs.*
Dough, Thick Pizza 60% AR § ED 20 lbs.*
Dough, Raised Donut 65% AR ED or S 15 lbs.**
Dough, Whole Wheat 70% AR ED 10 lbs.*
Eggs & Sugar for Sponge Cake B & C 8 lbs.
Icing, Fondant B 12 lbs.
Icing, Marshmallow C 2 lbs.
Shortening & Sugar, Creamed B 16 lbs.
Pasta, Basic Egg Noodle (max. mix time 5 min.) ED 5 lbs.*
* Stir Speed
* * 1st Speed
§ If high gluten flour is used, reduce above dough batch size by 10%.
NOTE: % AR (% Absorption Ratio) = Water weight divided by flour weight x 100%. Capacity depends on moisture content of
dough. Above capacity based on 12% flour moisture and 70°F water temperature.
ABBREVIATIONS — AGITATORS SUITABLE FOR OPERATION
B — Flat Beater ED — Dough Arm
C — Wing Whip (4-Wing) P — Pastry Knife
D — Wire Whip S — Sweet Dough Arm
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CLEANING
WARNING: UNPLUG MACHINE POWER CORD BEFORE BEGINNING ANY CLEANING
PROCEDURE.
The mixer should be thoroughly cleaned daily.
Bowls and agitators should be removed from the mixer and cleaned in a sink.
DO NOT use a hose to clean the mixer — it should be washed with a clean damp cloth.
Clean the Bowl Guard by wiping with a cloth or sponge and warm soapy water.
AGITATORS
B FLAT BEATER D WIRE WHIP C WING WHIP P PASTRY KNIFE S SWEET DOUGH ARM ED DOUGH ARM
ATTACHMENTS & ACCESSORIES
9" VEGETABLE SLICER POWER DICER ATTACHMENT VS9 DICER ATTACHMENT
MEAT CHOPPER ATTACHMENT SPLASH COVER
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MAINTENANCE
WARNING: UNPLUG MACHINE POWER CORD BEFORE BEGINNING ANY MAINTENANCE
PROCEDURE.
LUBRICATION
Bowl Clamps (Fig. 1) should be lubricated twice a year.
Motor
The motor has sealed ball bearings which require no lubrication maintenance.
Bowl Lift Slideways
The bowl lift slideways (Fig. 1) should be lubricated once each month. Apply a light coat of a "Food
Grade" grease to both sides of the slideways.
SERVICE
If service is needed on this equipment, contact your local Hobart Service Office.
FORM 19467 Rev. A (11-96)
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