KitchenAid K5-A Service Manual

GENERAL
INFORMATION
NORMAL PERFORMANCE
The KitchenAid mixer
is
powered with a uni-
versal motor which will operate
on
alternating
current only. The voltage
of
the
power supply
should be within
5
percent either way
of
the
voltage stamped
on
the
trim band and name plate.
A mixer in good running order will start turning
slowly when
the
switch lever
is
moved from the
"
OFF"
to
the
No. 1 position.
As
it
is
moved to
successively higher positions, the speed
of
the
beater increases until
the
No.
10
or
high speed
position
is
reached. At No. 1 position the plan-
etary should
turn
at approximately
60
RPM,
at
the
No.
10
position it should
turn
at approximately
275
RPM.
The mixer will run quietly in
the
lower
speed range, however, some noise can be expected
on the higher speed settings due
to
the
hum
of
gears and the motor.
When the mixer
is
first turned to
the
No. 1
position, there may be a slight clattering, irregular
noise. This noise will disappear
as
the lubrication
in the gear case warms up.
The switch lever should move freely with
the
"feel"
of
the
definite positions for speed Nos.
1,
2,
4, 6, 8 and 10. Speed Nos. 3, 5, 7 and 9 do
not
have definite notches.
POWER
A normal mixer will have full power
on
all
speed settings. To check for full power hold
the
planetary with one hand and move
the
switch lever
on and
off
with
the
other
hand. At
the
No. 1
position
it
should
not
be possible to stall
the
planetary except by a very great effort,
nor
should
the planetary slow down noticeably when
the
retarding pressure is applied.
HEATING
A normal mixer will heat up somewhat
if
run
continually
on
high speed for
15
minutes or more.
However,
the
extent
of
heating will
not
be very
noticeable.
On No. 1 position the mixer will heat up consid-
erably
if
run continuously for some length
of
time.
This
is
a very abnormal running condition,
as
none
of
the recipes specify running on low speed for
more than a few minutes at a time. Operation at
the No. 1 position
is
also the worst possible
condition
as
far
as
heating
is
concerned because
the cooling effect
of
the ventilating fan on the
armature is least
on
low speed and the resistor in
the speed control mechanism is
·called
upon to
absorb most
of
the
electrical energy.
A Mixer might heat up to
the
point where it
is
uncomfortable
to
the
touch
if
it
is
allowed
to
run
at low speeds for a considerable length
of
time. If
the mixer is new, it may even smoke slightly
if
there should be oil
on
the
resistor. Smoking will
stop
as
soon
as
the
oil evaporates.
Heating need be no cause for alarm,
as
it
will never
rise
to
the point where
it
will cause any damage.
Briefly, a mixer used under normal conditions will
not show any tendency
to
heat excessively. Even
under quite abnormal conditions
it
will not heat
to
the point
of
damage.
SPEED CONTROL
The speed control
of
the mixer
is
attained
through
the
use
of
an electrical governor a
ss
embly
mounted at
the
rear
of
the
armature shaft and
bearing against
the
control plate assembly. The
electrical circuit
is
made and broken by
the
action
of
the fly ball governor revolving against
th
e
control plate. When
the
switch lever is moved to
an ON position,
the
position
of
the control plate
with respect
to
the governor
is
changed by
th
e
action
of
the
switch control mechanism which
is
built into
the
bottom
of
the gear case and
mot
or
housing, thereby changing
the
speed
of
the
motor.
Thus, when the control plate
is
set close to the
governor, a relatively low speed
of
th
e
moto
r
causes
the
governor to make or break
the
electrical
circuit through
the
control plate contact points.
When the control plate
is
set farther away, a
greater
motor
speed
is
required before
th
e
gov-
ernor starts breaking
the
circuit.
The action
of
the
governor
is
such
that
th
e speed
of
the
motor will remain constant for a
giv
en
setting
of
the
control plate regardless
of
th
e load
imposed
on
the
mixer.
The speed control mechanism contains a resistor
which is connected in parallel with
the
control
plate contact points.
By
this means the electrical
circuit is
not
completely broken when
th
e contact
points are opened through
the
ac
tion
of
the
governor. The circuit
is
then shunted through the
resistor. A capacitor
is
connected across
th
e
control plate breaker points to suppress sparking.
During normal operation
th
e speed control mech-
anism will show a faint white spark at
th
e contact
points. A heavy blue spark indicates either a
defective capacitor
or
an open resistor.
3

KitchenAid K5-A Specifications

General

Model	K5-A
Type	Stand Mixer
Bowl Capacity	5 quarts
Speeds	10
Attachments Included	Flat Beater, Dough Hook, Wire Whip
Color Options	White