Liftmaster 81640 Parts
LiftMaster 81640 Replacement Parts
Genuine replacement parts and repair components for the LiftMaster 81640 chain drive garage door opener. Use the diagram above and the part-number tables below to identify the exact component you need. Click any part number to view or order that part.
Garage Door Opener Assembly Parts
| Ref | Part Number | Description |
|---|---|---|
| 1 | 031D0380M | Sprocket cover |
| 2 | 041C4220A | Gear and sprocket |
| 3 | 041A2817 | Drive and Worm Gear |
| 4 | 041A8393 | Front end panel with all labels |
| 5 | 041C0279 | Light socket |
| 6 | K108D0079M | Light lens |
| 7 | 030B0532-1 | Capacitor |
| 8 | K012A0373 | Capacitor bracket |
| 9 | 041D7440 | Universal motor |
| 10 | 041D7742-7 | Travel module |
| 11 | 041D9018 | Cover |
| 12 | 050ACTBMC | Logic board |
| 13 | 041D0239-1 | Logic board end panel |
| — | 041B4245-1 | Line cord |
| — | 041A3150 | Terminal block |
| — | 041A7946 | Wire Harness |
Rail Assembly Parts
| Ref | Part Number | Description |
|---|---|---|
| 1 | 041D3484 | Chain - for 7 foot door |
| 1 | 041D3483 | Chain - for 8 foot door |
| 1 | 041D3485 | Chain - for 10 foot door |
| 2 | 041A4813 | Chain Pulley Bracket |
| 3 | 004A1008 | Master link |
| 4 | 1707LM | One-Piece Rail 7 feet (2.1 m) |
| 4 | 1708LM | One-Piece Rail 8 feet (2.4 m) |
| 4 | 1710LM | One-Piece Rail 10 feet (3 m) |
| 5 | 041A3489 | Trolley Assembly (Threaded Shaft, Nuts, Washer, Clevis Pin, Ring, Master Link, Chain Extension) |
| 6 | 041A6689 | Trolley Threaded Shaft |
| — | K083A0011-1 | Rail Grease |
Installation Parts
| Ref | Part Number | Description |
|---|---|---|
| 1 | 041B0035B | Curved door arm |
| 2 | 041A5047 | Door bracket with clevis pin and fastener |
| 3 | 041A2828 | Emergency release rope and handle |
| 4 | 041A4353 | Header bracket with clevis pin and fastener |
| 5 | K029B0137 | Remote control visor clip |
| 6 | 041-0155-000 | Safety sensor bracket |
| 7 | 041-0136 | Safety sensor kit with receiving and sending sensors with 3 feet (.9 m) 2-conductor wire |
| 8 | 4178B0034B | Straight door arm |
| 9 | 041B4494-1 | White and red/white wire |
| 10 | K010A0020 | 3V CR2032 lithium battery |
| 11 | 041A5281-1 | Extension bracket (optional) |
| — | 041A2770-6 | Installation hardware bag |
| — | 114-5711-010 | User's Guide |
Accessories
| Ref | Part Number | Description |
|---|---|---|
| 1 | 883LMW | Push Button Door Control (81640) |
| 2 | 882LMW | Multi-function Control Panel (81600/81602/81650/83650-267) |
| 3 | 891LM | 1 Button Remote Control (81640) |
| 4 | 893LM | 3 Button Remote Control (81600/81602/81650/83650-267) |