Liftmaster 1246R, 1256R
Find the LiftMaster replacement parts you need for your model 1246R or 1256R chain drive-operated garage door opener with our handy online guide at Garage Door Supply Company. An illustrated diagram will show you what the part you want for your LiftMaster 1246R or LiftMaster 1256R looks like and where it fits on your garage door opener. Hover with your computer mouse over the illustration to see the part number. If you already know the part number, simply scroll down and click on the list of parts for your model garage door opener.
LiftMaster Motor Assembly Parts:
| Key | Part Number / Item Name |
| 1 | 41A4208-2 Chain Spreader |
| 1A | 31D380 Sprocket cover |
| 2 | 41A3261-1 Dual Gear and sprocket assembly |
| 3 | 41A2817 Drive/worm gear kit w/grease |
| 4 | 41B4245 Power cord |
| 5 | 143D100 End panel w/all labels (Not Available) |
| 6 | 4A1344 Light socket |
| 7 | 108D36 Lens Light Bulb Cover |
| 8 | 30B363 Capacitor - 1/3 HP |
| 9 | 30B532 Capacitor - 1/2 |
| 10 | 12A373 Capacitor bracket |
| 11 | 41A3150 Terminal block w/screws |
| Key | Part Number / Item Name |
| 12 | 41D3058 Replacement motor & bracket |
| 13 | 41A3583-11 Motor Cover |
| 14 | 41A2818 Limit drive gear & retainer |
| 15 | 41D3452 Limit switch assembly |
| 16 | 41C4398A RPM sensor assembly |
| 17 | 41C4246 Wire harness assembly w/plug |
| 18 | 41A2826 Shaft Bearing Kit (Not Available) |
| 19 | 41A2822A Interrupter cup assembly |
| 20 | 41A5021-1I Receiver logic board assembly |
| 21 | 41A5014-3 End Panel w/all Labels (Not Available) |
LiftMaster Chain Drive Rail Assembly Parts
| Key | Part Number / Item Name |
| 1 | 4A1008 Master Link Kit |
| 2 | 41A4813 Chain Pulley Bracket |
| 3 | 41A3489 Trolley Assembly |
| 4 | 183B99 One Piece T-rail Assembly (Not Available) |
| Key | Part Number / Item Name |
| 5 | 41D3484 Full Chain Assembly 7' Door |
| 41D3483 Full Chain Assembly 8' Door | |
| 41D3485 Full Chain Assembly 10' Door | |
| 6 | 83A11-2 Rail Grease AeroLube |
Installation Parts
| Key | Part Number / Item Name |
| 7 | 41A5047 Door Bracket |
| 8 | 41A4353 Header Bracket |
| 9 | 41A5034 Safety Sensor Kit |
| 10 | 178B34 Straight Door Arm |
| 11 | 178B35 Curved Door Arm |
| 12 | 41A5266-1 Safety Sensor Brackets |