Owner’s Manual
Compact Series Kitchen Machines
for models:
MUM 4405 UC • MUM 4420 UC
MUM 4620 UC • MUM 4635 UC
READ THIS MANUAL
thoroughly for important safety and operating
instructions before using this appliance.
TABLE OF CONTENTS
IMPORTANT SAFEGUARDS .................................................................. 2
Table of contents..................................................................................... 3
ABOUT YOUR KITCHEN MACHINE ....................................................... 4
Bosch Series 4 Kitchen Machine ............................................................ 4
Unpacking............................................................................................... 4
Electrical specifications ............................................................................ 4
Before using for the first time .................................................................. 4
Getting to know your Bosch Kitchen Machine ......................................... 6
Special accessories ..................................................................... 6
Power unit features .............................................................................. 6-7
Getting started ..................................................................................... 8-9
STANDARD ATTACHMENTS ................................................................ 10
Mixing bowl w/beating whisk, stirring whisk and dough hook ................. 10
How to use dough hook .............................................................. 10
Placing into operation with dough hook....................................... 11
How to use stirring and beating whisks....................................... 11
Placing into operation w/beating or stirring whisk......................... 12
Care and cleaning of bowl and its accessories ........................... 12
Blender with unbreakable plastic jar ........................................................ 13
How to use blender...................................................................... 13
Placing blender into operation...................................................... 14
Example of use of blender ........................................................... 15
Care and cleaning of blender........................................................ 15
Continuous shredder .............................................................................. 16
Continuous shredder, intended use .............................................. 16
Placing continuous shredder into operation.................................. 17
Care and cleaning of continuous shredder ................................... 18
SERVICE and REPAIR .......................................................................... 19
TROUBLESHOOTING ................................................................. 19
SAMPLE RECIPES .......................................................................... 20-21
SPECIAL ACCESSORIES ..................................................................... 22
BOSCH small appliance warranty ........................................................... 24
HOUSEHOLD USE ONLY
3
ABOUT YOUR KITCHEN MACHINE
• The MUM 4635 UC
comprised of the 450-watt power unit
with integral, internal, cord storage, four-
quart capacity mixing bowl with anti-
splash cover (MUZ4KR3), beating,
stirring whisks and dough hook, blender
(MUZ4MX2), continuous shredder
(MUZ4DS2) with shedding, slicing and
grating discs, high-speed drive cover and
accessory holder.
Congratulations on having selected one of
the Bosch Compact Series Kitchen
Machines. A series of kitchen machines that
we and—thankfully—cooking professionals
the world over, feel are the best compact
household-type kitchen machines available.
As you read through these instructions,
please pay particular attention to the
IMPORTANT SAFEGUARDS. Specific
safeguards for the attachments, as well as
warnings and cautions, are provided in each
section describing the operation of that
particular attachment.
Unpacking
Carefully remove the power unit from its
packaging and place it on the counter so it
is ready to use. As you remove the
accessories from the carton, check them
against Figure 1 to ensure that all the
standard parts are present.
Bosch Compact Series Kitchen Machine
The Bosch Compact Series Kitchen
Machine is available in 4 models:
Electrical Specifications
Check to make sure that the voltage on
which your kitchen machine is to operate
is the same as specified on the rating plate.
Standard North American models have an
electrical power rating of 400- or 450-watt
maximum power rating with the accessory
attachment that draws the most power
(some accessory attachments may draw
less power).
• The MUM 4405 UC
comprised of the 400-watt power unit
with integral cord storage, four-quart
capacity mixing bowl, with anti-splash
cover (MUZ4KR3), beating, stirring
whisks and dough hook and high speed
drive cover.
• The MUM 4420 UC
comprised of the 400-watt power unit
with integral cord storage, four-quart
capacity mixing bowl with anti-splash
cover (MUZ4KR3), beating, stirring
whisks and dough hook, blender
(MUZ4MX2), continuous shredder
(MUZ4DS2) with shedding, slicing and
grating discs, high-speed drive cover and
accessory holder.
Before Using for the First Time
Before using any of the attachments for the
first time it is recommended they be washed,
rinsed well and dried. Of the attachments
supplied, with the systems in this manual,
all parts, except the blender’s blade/base
assembly, are dishwasher safe:
> The blender’s blade/base assembly
should be washed under running water
and dried.
• The MUM 4620 UC
comprised of the 450-watt power unit
with integral, internal, cord storage, four-
quart capacity mixing bowl, with anti-
splash cover (MUZ4KR3), beating,
stirring whisks and dough hook, blender
(MUZ4MX2), high-speed drive cover and
accessory holder.
Note: It is recommended that the blender’s
blade/base assembly never be left to
stand in water or soap solution to prevent
the bearing lubricant from being washed out.
4
MUM 4405 UC
MUM 4620 UC
MUM 4420 UC
MUM 4635 UC
Figure 1
5
Power Unit Features
Motor
Getting to Know Your Bosch Kitchen
Machine
The MUM 4405 and MUM 4420 have a 400-
watt motor while the MUM 4620 and MUM
4635 have a 450-watt motor, the most
powerful motor offered with any compact
household kitchen machine.
The Bosch Compact Series Kitchen
Machines are comprised of various
attachments, depending on the system
purchased (see above). In addition to the
attachments listed on the previous pages
that are available with the standard systems,
Bosch offers many special accessories.
All MUM Compact Series power units have
the following features, refer to figure 2:
Special Accessories
Electronic speed control
To allow you to get the most service from
your Bosch Compact Series Kitchen
Machine, Bosch engineers have designed
a line of special accessories to expand the
usefulness of your machine. In addition to
the attachments that come with the various
Compact Series Kitchen Machines, there
are optional accessories that can be ordered
separately. These accessories include a
food and meat grinder, grain mills, citrus
juicer and ice cream maker, plus additional
attachments that can be used with the meat
grinder: fancy cookie attachment, fruit pulper
and grater attachment. See SPECIAL
ACCESSORIES at the back of this
booklet, page 23. Or, to view all currently
available accessories, visit our Web site at
Six-position rotary switch is located at the
side of the multifunction arm of the power
unit: 4 speeds plus a locking park position
“P” and a stop position “O/Off,” see figure
2a.
Three accessory drives
Three drives:
•
A high-speed drive used for blender
and other attachments requiring high-
shaft speed
•
A mid-speed drive used for continuous
shredder attachment and other
attachments requiring mid-range shaft
speeds
and
•
A high torque drive used for whisks,
dough hook and meat grinder
attachment and other attachments
requiring more torque.
Work on expanding the usefulness of the
Bosch Compact Series Kitchen Machine
is a continuing process. If there is some
type of accessory in which you are
interested in that you cannot find at the back
of the book or on our Web site, please either
write us at:
Each of these drives is controlled by the 4-
speed electronic control providing 12
distinct shaft speeds optimizing the motor
speed for different loads encountered by
different attachments.
•
Bosch Small Appliances
Customer Support
BSH Home Appliances
5551 McFadden Avenue
Huntington Beach, CA 92649
Ergonomic multifunction arm
Four locking positions place attachments
in most ergonomic position for their use.
Park position “P”
Six-position rotary switch, located at side
of the multifunction arm of the power unit,
has “P” position used to “park” the drive unit.
The drives must be placed in the park
position prior to changing position of
ergonomic multifunction arm. If drives are
or call us at:
•
1 (866) 44BOSCH
[1 (866) 442-6724]
6
not in proper position for rotating the arm
turning the rotary switch to the “P” position
will cause motor to reposition drives. If motor
does not reposition drives when turned to
the “P” position, the drives are already in
position for arm to be rotated.
of the power unit, where the cord may be
wound around the holder, see 2d.
The MUM 4620 and the MUM 4635 have
internal cord storage. To store the cord or
reduce the length of the cord with these
two units, simply pull on the cord and let
the cord be retracted into the base of the
machine, see figure 2.
Motor drive covers
Two covers are provided to cover high -speed
and mid-speed drive when they are not in
use, see figure 2c.
Four rubber feet
Four rubber feet will provide the stability,
while also serving to isolate the power unit
from the hard surface to minimize noise and
vibration.
Convenient cord storage
The MUM 4405 and MUM 4420 have
convenient cord storage located on the back
Figure 2.
7
Getting Started
3. Remove drive cover.
The operation of your Bosch Compact
Series Kitchen Machine is summarized
below.
Remove drive cover from drive to be
used, if necessary, see figure 2c.
4. Select attachment to be used.
Select attachment you wish to use.
Reposition the ergonomic multifunction
arm, if necessary (see figure 4a & 4b),
and place attachment on power unit.
Specific instructions for using each of the
attachments, provided with the kitchen
machine systems covered by this manual,
follow the summarized instructions. Please
read the specific instructions thoroughly
before using that attachment, paying
particular attention to the IMPORTANT
SAFEGUARDS and WARNINGS provided.
The Bosch Compact Series Kitchen
Machine uses its attachments in 6
modes. The various modes used (the
drive and position of the arm) are
shown in table 1.
1. Place power unit on suitable work
surface.
Before using the machine with any of
the attachments, the power unit should
be placed on a suitable work surface.
The surface should be sturdy, smooth
and clean; make sure that there is no
flour or oil on the surface. A clean
smooth surface will provide the best
footing and will limit slipping and/or
“walking.”
2. Plug power unit into power supply.
Pull the electrical cord or unwind the
electrical cord to appropriate length.
Make sure power unit is turned to Off
“O/Off” and plug it into a convenient
nearby receptacle. Turn rotary knob
to park “P” position to make sure the
drives are in proper position to rotate
arm and/or install attachment. If motor
does not reposition drives when turned
to “P” position, the drives were already
in position for arm to be rotated.
Table 1.
See specific instructions for
attachment selected. Specific
instructions are located on pages
listed below:
WARNING
1. Do not twist or attempt to push in the
electrical cord. If the cord becomes
jammed, pull out the cord to its full
length and then allow it to slowly
retract.
2. If the power should be interrupted, the
power unit will remain on and will restart
when power is restored.
Attachment
Pages
Mixing bowl w/dough hooks ..... 10–11
Mixing bowl w/whisks............... 11–13
Blender ..................................... 13–15
Continuous shredder............... 16–18
Table 2.
8
5. Operate unit with rotary switch.
Once the attachment is in place, the
speed of its moving components can
be controlled through the use of the
rotary switch at the side of the
ergonomic multifunction arm. See
figure 2a. The rotary switch has six
positions:
necessary to move the arm to allow
removal of the attachment. Refer to the
instructions for the specific
attachment being used.
8. Continue use.
If the attachment was of the batch feed
type and you wish to continue using
the attachment, empty the bowl or jar
of the attachment per its specific
instructions and reinstall the
attachment as before. Repeat the
steps 5 through 7 as often as
necessary to complete necessary
work.
a. “P,” a park position used to “park”
the drive unit prior to changing the
positions of the ergonomic multi-
function arm.
b. “O/Off,” the off position.
c. Four speeds labeled 1, 2, 3 and 4.
Speed 1 is the lowest speed. The
speed increases with each
succeeding step up to the highest
speed, speed 4.
9. Work completed,
remove attachment.
All models of the Bosch Compact
Series Kitchen Machines incorporate
an electronic safety control to protect
the motor. If the safety becomes
activated, the motor will stop running.
Turn the machine to off and allow to
cool. See TROUBLESHOOTING at the
back of this manual.
If the attachment is of the continuous
feed type, or is the batch type, and
you have completed the work you
wished to perform with the
attachment, remove the attachment
from the power unit. In some cases it
will be necessary to move the arm to
allow removal of the attachment. Refer
to the instructions for the specific
attachment being used.
WARNING
Operate the appliance with the attachments
in their operating positions, as shown in
table 1, only. Do not operate at no load.
10. Place contents (batch feed type).
If the attachment is the batch feed
type, disassemble per the specific
attachment’s instructions and place
the contents in a suitable container.
6. Turn power unit off.
When your work with the attachment
is completed or the capacity of the
batch feed attachment has been
reached, turn the power unit to off
position, “O/Off,” turn the rotary knob
to the “P,” park position, to place the
drives to their parked positions, and
then unplug.
11. Care and Cleaning.
Once you have completed working
with the Bosch Kitchen Machine, the
next step is to disassemble and clean
the attachments. If you wish to use
another attachment, please return to
step 4, above.
Power unit
7. Remove the attachment.
With the power unit turned off and
unplugged, it should be cleaned only with
a clean, damp cloth. Then wipe off the motor
Remove the attachment from the
power unit, in some cases it will be
9
drive cover and reinstall on the power
unit.Never use coarse or caustic cleaning
products to clean the power unit. Never
immerse the power unit in water.
has come to a complete stop; when
switched Off, the power unit will
continue to turn for a brief period.
The power unit may be left on the counter
or stored for future use. In either case,
always be sure to replace the drive covers
on the drive that was used, if it had been
removed. This will prevent dust and/or flour
buildup in the drive.
All models of the Bosch Compact Series
Kitchen Machines are provided with a four-
quart mixing bowl with beating and stirring
whisks and a dough hook. Additional mixing
bowls are available as accessory items
under the part numbers: MUZ 4 KR3, refer
to SPECIAL ACCESSORIES section at the
back of this manual. The mixing bowl with
beating whisk, stirring whisk and dough
hook consists of the following components,
see figure 3:
Wind the cord around the cord holder or
pull on the cord to have it retract into the
machine, and then place in your chosen
storage area.
Attachments
How to Use Dough Hook
The attachment(s) that has been used
should be disassembled and washed, per
their specific instructions, dried and stored
for future use.
The dough hook and mixing bowl are
intended to be used to knead yeast doughs
and to mix heavy cookie and pastry
doughs, and also when adding nuts,
chocolate chips, dried fruit, hard butter or
shortening, hardened brown sugar, etc. to
batters.
STANDARD ATTACHMENTS
Following are the specific instructions for
the standard attachments provided with the
Bosch Compact Series Kitchen Machines
covered by this manual.
Mixing Bowl with Beating Whisk,
Stirring Whisk and Dough Hook (MUZ 4
KR3)
WARNING
1. There is a risk of injury from rotating
tools when using the mixing bowl with
the beating whisk, stirring whisk or
dough hook.
2. Avoid contact with moving parts. Keep
hands, hair and clothing, as well as
spatulas, bowl scrapers and other
utensils away from dough hook and
whisks during operation to prevent
injury and/or damage to the power unit
or accessories.
Figure 3.
3a. Stirring whisk
3b. Beating whisk
3c. Dough hook
3d. Dough deflector
3e. Anti-splash cover
3f. Mixing bowl
3. Always work with the bowl lid fitted in
place.
4. Do not change tools until the power unit
10
Note: If the drives had not been parked after
last use it may be necessary to plug
in the power cord and turn the rotary
knob to the park position “P” to
position the drive to allow the dough
hook to be lowered into the bowl.
Use of mixing bowl with dough hook
Before beginning to attach this or any other
attachment, make sure that the power unit
is on a smooth, clean, suitable work
surface and switched to off position “O/Off.”
1. Before using the mixing bowl and
dough hook for the first time, it
is recommended that the bowl,
anti-splash cover and dough hook be
washed. All components of the mixing
bowl and the dough hook are
dishwasher safe. Or they may be
washed in warm soapy water. After
washing, rinse well and dry before
using.
Place the anti-splash cover on the
bowl. The cover has an integral filling
funnel. The cover may be removed to
add ingredients, but the cover should
be in place whenever the power unit is
in operation. The anti-splash cover
serves to prevent the escape of flour
dust at the beginning of the stirring and
kneading process, and also serves to
prevent accidental contact with the
moving dough hook.
2. The dough hook is used in mode 1, see
table 1. To place the mixing bowl and
insert the dough hook the arm must be
moved as shown in figure 4:
Placing into Operation w/Dough Hook
Make sure that the power unit is on a
smooth, clean, suitable work surface and
switched to off position, “O/Off.” Pull the
electrical cord or unwind the electrical cord
to the necessary length and plug into a
convenient outlet. The mixing bowl with
dough hook is now ready for operation.
Sample recipes may be found in the recipe
section, at the back of this manual.
How to Use Stirring and Beating Whisks
All Bosch Compact Series Kitchen
Machines come with stirring and beating
whisks, in addition to the dough hook, see
figure 3.
Figure 4.
The beating whisk is intended to be used
for very light substances, such as cream,
egg whites, sauces, batters and light pastry
doughs that are thin enough to pour.
4a. Depress release button
4b. Lift arm up
4c. Place bowl
4d. Insert dough hook w/deflector
The stirring whisk is intended to be used
for stirring items, such as cake mixes and
light cookie doughs. Always be sure to use
the dough hook for heavy cookie doughs;
for example, oatmeal-chocolate chip cookie
dough.
3. Once the dough hook is in place, check
to make sure it is fully inserted and
then rotate the arm to the down position
by pressing the release button and
lowering the arm.
11
Use of mixing bowl with beating whisk or
stirring whisk
Placing into Operation w/Beating
Whisk or Stirring Whisk
Before beginning to attach this or any other
attachment, make sure that the power unit
is on a smooth, clean, suitable surface and
switched to off position, “O/Off.”
Make sure that the power unit is on a
smooth, clean, suitable work surface and
switched to the Off position, “O/Off.” Pull
the electrical cord or unwind the electrical
cord to the necessary length and plug into
the wall outlet. The bowl with whisk is now
ready for operation. Sample recipes may
be found in the recipe section, at the back
of this manual.
1. Before using the mixing bowl and
beating whisk or stirring whisk for the
first time, it is recommended that the
bowl, anti-splash cover and whisk be
washed. All components are
dishwasher safe. Or they may be
washed in warm soapy water. After
washing, rinse well and dry before
using.
2. Both the stirring whisk, or beating
whisk is used in mode 1, see table 1
and figure 4. Follow the same step as
shown in figure 4, but for 4d insert the
whisk you wish to use rather than the
dough hook and its deflector.
Mixing bowl tips:
1. When using the mixing bowl to knead
or mix a recipe designed to be
prepared by hand, you will find that with
the Bosch Kitchen Machine you can
usually place all the ingredients in the
mixing bowl at once. When doing this,
always place the liquids in first. This
will assure more thorough mixing.
2. When adding ingredients to a mixture:
a. Turn the rotary switch to a lower
speed
3. Once the whisk is in place, check to
make sure it is fully inserted and then
rotate the arm to the down position by
pressing the release button and
lowering the arm.
b. Add the ingredients through the
funnel
Removing Contents
Note: If the drives had not been parked after
last use, it may be necessary to plug
in the power cord and turn the rotary
knob to the park position “P” to
position the drive to allow the whisk
to be lowered into the bowl.
Before beginning to remove the contents
from the mixing bowl, make sure that the
power unit has been turned to the park
position “P,” to position the drive, and then
to the off position, “O/Off.” Remove the anti-
splash cover. Once the cover has been
removed, the release button may be
depressed and the ergonomic arm, lifted
upward, see figures 4a and 4b. The dough
hook or the whisk may be removed by
pulling outward with a straight, steady
motion.
Place the anti-splash cover on the
bowl. The cover has an integral filling
funnel. The cover may be removed to
add ingredients, but the cover should
be in place whenever the power unit is
in operation.The anti-splash cover
serves to prevent the escape of flour
dust at the beginning of the stirring
process and also serves to prevent
accidental contact with the moving
whisk.
The mixing bowl can be removed from the
power unit by lifting.
The contents may now be used as desired.
12
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