Chamberlain 7902 K - Manual (Page 38)

Motor Unit Assembly Parts
38
DN
UP
Brown
Wire
(Down)
Contact
LIMIT SWITCH ASSY.
Grey
Wire
Yellow
Wire
(Up)
Contact Center Limit
Contact
Drive
Gear
2
1
3
4
5
6
7
8
8a
8b
8c
9
10
11 11a
11
12
13
14
15
16
17
8d
8d
8e 8f
8g
18
KEY PART
NO. NO. DESCRIPTION
1 31D477 Drive shaft cover
2 41B4245 Line cord
3 30B363 Capacitor – 1/2 HP
4 12A373 Capacitor bracket
5 41A3150 Terminal block w/screws
6 41D4671 Limit switch assembly
7 12D630 Bracket: light socket, limit switch
8 41A5388 Motor drive assy complete with:
8a 144B41 22T Pulley
8b 144B42 28T Pulley
8c 20B17 Drive belt
8d 158A69 Retainer rings
8e 41C556 Isolator bracket spacers
KEY PART
NO. NO. DESCRIPTION
8f 41A5394 Assy. bracket motor mount
8g 81B170-1 Shaft limit worm
9 41C4672 Screw drive RPM kit
10 41A4837-1 Worm gear and retainer
11 41C5417 Low voltage wire harness
11a 41C5416 High voltage wire harness
12 41A5389-1C Receiver logic board assy.
13 41C5490-9 Cover
14 41C22-1 Drive coupling hub
15 175C147 Light socket
16 108D60 Light lens
17 41A5387 Chassis with rail bracket
18 12B654 Motor support bracket