Craftsman 139.18473D User's Manual | Page 38

Craftsman Garage Door Opener User's Manual - 139.18473D.
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Motor Unit Assembly Parts

38

DN

UP

Brown
Wire

(Down)
Contact

LIMIT SWITCH

ASSEMBLY

Grey
Wire

Yellow
Wire

(Up)
Contact

Center Limit
Contact

Drive
Gear

1

2

4

3

18

19

17

15

10

14

12

8

9

11

5

6

7

16

13

KEY

PART

NO.

NO.

DESCRIPTION

1

41A5615

Chain Spreader

2

41C4220A Gear and sprocket assembly

Complete with: Spring washer,
thrust washer, retaining ring,
bearing plate, roll pins (2), drive
gear and worm gear, helical gear
w/retainer and grease

3

41A2817

Drive/worm gear kit w/grease, 
roll pins (2)

4

41B4245

Line cord

5

41A5484-5 End panels w/all labels 

6

4A1344

Light socket

7

108D77

Lens 

8

30B532

Capacitor - 1/2 HP

9

12A373

Capacitor bracket

10

41A3150

Terminal block w/screws

11

41D3058

Universal replacement motor &
bracket assembly.’
Complete with: Motor, worm,
bracket, bearing assembly, RPM
sensor

KEY

PART

NO.

NO.

DESCRIPTION

12

41A5525-28 Cover 

13

41A2818

Limit switch drive & retainer

14

41D3452

Limit switch assembly

15

41A2822-1

Interrupter cup assembly

16

41C4398A

RPM sensor assembly

17

41AC150-1

Receiver logic board assembly.
Complete with: Logic board,
end panel w/all labels, light
socket

18

41C5497

High voltage wire harness

41C5498

Low voltage wire harness

19

41D179

End panel w/all labels 

NOT SHOWN

41A2826

Motor shaft bearing kit

41A2825

Opener assembly hardware kit
(includes screws not
designated by a number in
illustration)

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