KitchenAid Professional 5 Service Manual

							
KITCHENAID
Stand Mixer Service Manual LIT4177310-C                          2005 KitchenAid
D.  To remove the speed control link and cam
assembly, take out the pivot screw and tension 
washer (Fig. 24).
Before removing the speed control link and cam 
assembly, remove the control board spring from the 
link. 
The flat spring is removed as you remove the speed 
control link assembly.
The speed control link and cam assembly can be 
removed by pulling it out of the gearcase-motor 
housing (Fig. 25).
E.Unscrew and remove the two #10-24 nuts
(Fig. 26).
Remove the bearing bracket (Fig. 27).
Now remove the motor stud sleeve from the stator 
stud (Fig. 28).
Fig. 24  The pivot screw and tension washer are removed 
with a phillips screwdriver.
Fig. 25 Removing the speed control spring, flat spring and 
the speed control link assembly.
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Fig. 26  Two 10-24 nuts are removed from the 
bearing bracket.
Flat Spring 
						

							
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Stand Mixer Service Manual LIT4177310-C                          2005 KitchenAid
F.Unscrew the two brush holder screw caps and 
remove the brushes and springs (Fig. 29).
Viewing from the rear, mark the brushes right and 
left, and also the top of the brush, just as it was 
removed from the motor.
G.The armature can now be removed.  
With the attachment hub bevel gear removed, 
insert a drift punch through the attachment hub 
opening and gently tap the armature back through 
the stator using a block of wood to protect the 
shaft (Fig. 30).
Remove the worm end bearing washer and the 
fan end spacer washer.
Fig. 27  Bearing bracket being removed after two #10-24 
nuts have been removed.
Fig. 28  The motor stud sleeve is shown being removed after 
bearing bracket removal.
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Fig. 29  the brush holder caps are loosened to access 
brushes for removal. Make sure to mark orientation.
Fig. 30  A block of wood is used to protect the motor 
shaft when removing the armature. 
						

							
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Stand Mixer Service Manual LIT4177310-C                          2005 KitchenAid
H.  Pull the two wires from the rear of the stator 
through the slot in the gearcase-motor housing so 
they are inside the gearcase-motor housing and 
sticking out the back (Fig. 31).
Using long pliers, pull the brush slips from the 
stator out of the brush holders. Note orientation of 
stator clip in brush holder.
Remove the two #10-24 nuts from the stator studs 
and carefully set aside for use during reassembly.
Unscrew one stator stud and pull out the stator
(Fig. 32).
To pull the stator out, reach into the motor housing 
and grasp the stator  and pull it out.  Caution:  Do 
not nick or damage the copper coil wires on 
the motor.
I.  To remove the brush holder , it will be 
necessary to remove the other stator stud.
Under the stator studs are #10-24x1/4 cup point 
screws. To remove the set screws, use a 3/32”
Allen wrench; older models may use a flat 
screwdriver (Fig. 33).
Fig. 33 Removing the brush holder set screws with a allen wrench.
Unscrew the set screws a few turns and (from 
inside the housing) push the brush holder out by 
hand. Note the orientation of the brush insert 
inside the brush holder.
Fig. 31 Wire orientation inside the gearcase-motor housing 
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Fig. 32  The stator is shown being removed from the motor 
housing.
Stator Wires 
						

							
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Stand Mixer Service Manual LIT4177310-C                          2005 KitchenAid
SECTION 3
REPAIRS TO MOTOR AND CONTROL UNIT
A.  Clean the brush holder  with solvent and 
wipe them dry with a clean dry cloth.
Install the brush holder  into the gearcase-
motor housing so that the rim on the holder seats 
against the bore step in the motor housing.
B.  Clean the brush holder inserts with solvent and 
wipe them dry with a clean dry cloth. Install the 
inserts into the brush holder. 
They must be oriented, viewing the motor housing 
from the rear, as shown below in (Fig. 34).
Fig. 34  The orientation of the brush holder inserts viewing 
from the rear of the motor housing.
Lock the brush holder  with inset in place
with the #10-24x1/4”cup point setscrews.
EARLY PRODUCTION SOLID STATE
STAND MIXERS
The early production solid state stand mixers 
utilized a square brush and brush holder. Square 
brushes are no longer available.
Brushes with chamfered edges will fit into square 
brush holders. 
C.Test the stator with an ohmmeter (Fig. 35).
Set the ohmmeter on the 1X scale and be sure it is 
set at zero ohms when shorting the test leads.
Fig. 35  Test the two stator coils with an ohmmeter set on 
low scale.
In upper coil, connect one ohmmeter leadto the red 
wire and the other to the black wire of the coil.    
If the ohmmeter shows a low resistance reading, the 
coil is good. Check the other coil in the same way.
If the needle on the ohmmeter deflects to zero or 
there is no deflection, the coil is bad and the stator 
must be replaced.
D.  Assemble the two stator studs and tighten them 
by using long nose pliers.
Be sure the nose of the pliers is placed on the stator 
stud in the area that the stator seats so the threads 
will not be deformed.
Start the stator on the two stator studs and into the 
ribs of the motor housing (Fig. 36).
Fig. 36  Positioning the stator on the two stator studs and 
into the ribs of the motor housing.
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Stand Mixer Service Manual LIT4177310-C                          2005 KitchenAid
The two long leads from the stator must be on the 
same side as the slot in the motor housing. Insert the 
stator brush clips between the brush holder housing
and brush insert.
A slot is provided in the brush holder housing for 
this brush clip. Insure that the brush clips are pushed 
in all the way so the brush and commutator on the 
armature will clear them when assembled.
E.Push the stator back as far as it will go, then 
place the star washers and #10-24 nuts on each 
stator stud. 
Tighten both nuts.
Put the long leads from the stator through the slot 
in the bottom of the motor housing (Fig. 37).
Fig. 37  Route the two stator wires through the slot in the 
motor housing.
Place the stator stud sleeve over the stator stud and 
route the white wire from the stator between the stud 
sleeve and the motor housing.
F.  Check the armature on a growler or take the 
armature to a electric motor repair shop and let them 
test it.
If it is not in good condition, replace it with a new 
one.
G.  Check the ventilating fan. Straighten the blades 
if they are bent (Fig. 38).
If the armature is replaced, move the washers from 
the old armature to the corresponding end of the new 
armature.
Add one drop of Locktite to the outer race of the 
ball bearing and install the armature in the 
motor housing (Fig. 39).   
Fig. 38  Check the blades of the armature ventilating fan 
and straighten if bent.
Fig. 39  Locating the armature into the gearcase-motor 
housing.
If necessary, tap the end of the armature shaft 
with a non-metallic mallet to seat the armature 
bearing into the gearcase-motor housing.
H.  Check the bearing in the bearing bracket.
To replace the bearing, remove the retaining 
clip (Fig. 40).
Take out the felt washer and the old bearing.
Place the new bearing in cavity.
Soak the felt washer with oil and place in cavity.  
Place the retainer on the bearing so that the 
tongue fits into the square notch and push the 
retainer clip in place. 
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Stator Wires
Routing Of White Wire
Spacing Washer
Bearing Washer 
						

							
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Stand Mixer Service Manual LIT4177310-C                          2005 KitchenAid
On older models, to replace the bearing, remove the 
three #4-40x1/2 pan head screws and lift off the 
bearing retainer.
Take out the old bearing and felt washer.
Place new bearing in cavity with the square notch  
toward the top of the bracket.
Soak the felt washer in bearing cap with oil. 
Place the retainer on the bearing and screw in place 
with the three #4-40x1/2”screws.
. 
Fig. 40 Bearing bracket assembled & unassembled
I.Install the bearing bracket. Start bracket onto the 
two stator studs.
Push the bracket back until the stator studs are 
through the bracket and it seats into the ribs of the 
gear case.  
Start the two nuts on the stator studs and turn them 
until the bearing bracket is seated (Fig. 41).
Fig. 41  Tighten the two nuts on the stator studs to seat the 
bearing bracket.
J.  The armature should always be checked for end 
play. Armature should turn freely with minimal 
end play. 
On older models -after the thrust bearing
assembly has been seated properly and proper 
amount of spacing washers placed at the rear, there 
should only be a perceptible amount of end play to 
assure free operation of the armature. 
If there is too much end play, add another thin 
washer.
To do this, remove the bearing bracket and add 
the washer to the armature shaft, then reassemble 
the bearing bracket into the gear case-motor 
housing.
K.  If the old brushes are more than 5/16”long, 
assemble them in the brush holders.
From the back of the unit, put the brush marked 
“right”in the right side of brush holder. Be sure the 
side marked “up”is at the top.
Push the brush in and lock it in place with a brush 
holder screw cap (Fig. 42).
Put left hand brush in the mixer in the same way.
Fig. 42  Placing one of the brushes into the mixer brush holder.
L.  Place the speed control link and cam assembly 
through the slot in the bearing bracket with the cam 
portion of the speed control link and cam assembly 
toward the top of the gearcase-motor housing.
Place the flat spring in position and slide the 
mixer speed link and cam assembly over the flat 
spring; attach the speed control spring on the speed 
control link and cam assembly (Fig. 43).
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Square Notch
Tongue
Brush holder screw cap assembly 
						

							
KITCHENAID
Stand Mixer Service Manual LIT4177310-C                          2005 KitchenAid
Fig. 43 Slide the speed control link over the flat spring and 
attach the speed control spring to the link.
Place the stud on the speed lever through the hole 
in the speed control link.
Place the tension washer on the pivot screw and 
screw it into the gearcase-motor housing until tight 
(Fig. 44).
Fig. 44  Securing the pivot screw to the gearcase after 
placing the tension washer.
M.  If the spring in the governor is rusty, replace 
the governor assembly.
Place the governor drive pin in the armature shaft.  
With  drive pin at top of the shaft, place the 
governor on the shaft with the keyway up (Fig.45).
Push the governor onto the shaft as far as it will 
go.
NOTE: Never attempt to take the governor apart. 
The purpose of this picture is to show where
governor seats on drive pin (Fig. 46).
Fig. 45 The governor shown before being placed on the 
motor shaft.
Fig. 47  Using a 3/8”nut driver to seat the governor. Tap gently. Never drive directly against governor ball.
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Flat Spring
Speed Control Spring 
						

							
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Stand Mixer Service Manual LIT4177310-C                          2005 KitchenAid
N.If the phase control was removed or has been 
replaced, make sure the heat sink on the triac unit 
has sufficient amount of thermal conductive 
compound applied to that surface before assembly.
Place the #4-40x1/4”pan head screw through the 
hole in the triac and screw it into the bearing bracket 
(Fig. 48) until it is tight (4 -5 in. lbs.).
Fig. 48  The triac is shown being secured to the  bearing 
bracket.
CAUTION: Do not attach the phase control 
excessively tight, as this pressure could deform the 
heat sink, resulting in damage to the control.
O.  Place the control plate on the bearing bracket 
with the adjusting screws at the top (Fig. 49).
Fig. 49  Placing the control board on the bearing bracket. 
Turn in the screws until 3/8”of the screw 
remains. 
Have both screws turned in evenly so the opposite 
end of the control plate rests squarely on the 
extensions of the bearing bracket.
With long nose pliers, hook the control plate spring 
into the hole on the bottom part of the control plate
(Fig. 50).
Fig. 50  The control plate spring being grasped with pliers 
and positioning the hook into the hole at the bottom.
Place the end seal onto the mixer.
Connect the two flag terminals from the stator and 
the four flag terminals from the phase control to the 
control plate. 
Refer to the wiring diagram for proper terminal 
connections.
Be certain flag terminal connections to control 
plate are tight.
If necessary, crimp the terminals with a needle 
nose pliers.
Note: Leave the control unit. It is now ready for 
timing, but a better job can be done when mixer is 
completely reassembled.
Page 15 
						

							
KITCHENAID
Stand Mixer Service Manual LIT4177310-C                          2005 KitchenAid
SECTION 4
REPAIRS TO GEARCASE AND PLANETARY
NOTE:Grease is not shownin these pictures.
A.Examine the  bearings in the attachment hub area 
and top of the gearcase. 
These bearings are cast into the gearcase-motor 
housing.
If they are worn badly, the entire housing must be 
replaced.
However, shafts turn slowly in these bearings and 
the bearings have a long life.
B.Examine the attachment hub bevel gear.
If it shows wear in the teeth, it should be replaced.
If the gear is replaced, coat the shaft of the bevel 
gear with a light grease.
Push it into the attachment hub bearing from the 
inside of the gearcase(Fig. 51). It does not have a 
washer, so push it in as far as it will go.
Fig. 51  The attachment hub bevel gear being pushed into 
the attachment hub bearing from inside the gearcase.
C.  With a phillips head screwdriver, remove the 
three #10-24x7/16”phillips filister head screws and 
lock washer assemblies and lift up on the worm 
gear  bracket  bearing and pin assembly to remove 
(Fig. 52).
Fig. 52  Worm gear bracket bearing and pin assembly.
D.  Remove the center bevel gear and vertical center 
shaft.
Push the vertical center shaft upward, exposing the 
pin (Fig. 53), and remove the pin.
Fig. 53  Remove pin after pushing vertical center shaft up.
Pull out the vertical center shaft with your fingers 
and remove the shaft from the the bottom of the gear 
case bottom cover (Fig. 54).
Check the shaft for bearing wear.
Dark gray or indented surfaces indicate shaft 
should be replaced. 
Lift gears from case for inspection (Fig. 55).
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Stand Mixer Service Manual LIT4177310-C                          2005 KitchenAid
Fig. 54  Removal of vertical shaft from bottom cover.
Fig. 55  Bevel center gear being lifted for inspection.
E.  Check the lower center bearing for wear.
This is an oilless bearing and should be in good 
condition.
If it is worn, the gearcasebottom cover will have 
to be replaced, since the bearing is an integral part.
F.  If the attachment hub bevel gear was replaced, 
then the bevel center gear on the bottom cover 
must also be replaced.
G.  Place the same washer on lower center bearing.
Place the gear assembly on top of the center 
bearing. Insert the end of the vertical center shaft 
opposite the “O”ring into the bottom cover 
(Fig. 54).
Push shaft upward and insert the pin (Fig. 53).
Center pin in shaft and lower shaft into gear 
assembly.
Turn shaft until pin seats in gears, and gears and 
shaft turn together. Wipe all excess lubricant from 
bottom of vertical shaft on “O”ring.
H.Check the worm gear and pinion gear (Fig.56).
Fig. 56  Check worm gear and pinion before reassemble.
To replace these gears, drive out the groove pin 
(Fig. 57).
Fig. 57  The drive pin must be removed to change the gears.
Make a note of the positions of fiber washers.
They will be installed the same way with the new 
gears. From the top of the worm gear bracket, drive 
out the pinion shaft.
NOTE: The pinion on pre May 6th, 2002,  
K45SS models, have 11 teeth. On all other units 
the pinion has 10 teeth.
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Drive pin
Worm Gear
Pinion gear and shaft
Shim washer