Genuine replacement parts for the LiftMaster SL930 DC slide gate operator. Use the exploded view above with the tables below to identify what you need, then click any part number to order.
Before you order — three things to check.
1. The SL930 runs a 70 volt DC motor, not 12 or 24 volt. It is not the same platform as the SL505 or SW425 even though it shares a few service kits with them. The 20-40351 motor, the 21-40359 12V transformer and the 9596 main transformer are specific to this operator.
2. Two kits differ from the SL920 by a single digit. The SL930 takes drive sprocket kit K75-40401 and limit switch kit K74-40347. The SL920 takes K75-40402 and K74-40386. All four are real and all are stocked, so this can go wrong in either direction. The two operators do share the rectifier, external resistor, idler sprocket and reduction sprocket kits — but not the motor, the transformer, the limit switch kit or the drive sprocket kit.
3. Most of the drive train is sold as lettered service kits. There are four separate sprocket kits — idler, drive, reduction, and the motor and gear box assembly — and ordering the wrong one is easy. Match the letter on the drawing before you buy.
This is an older platform and much of it is discontinued. The motor, gear box service kit, limit switch, limit nut and limit/drive shaft assembly are all no longer available from LiftMaster. Where a part is still stocked here, it is stock on hand.
Part numbers shown as plain text rather than links are no longer available from the manufacturer. They are listed so you can identify what you have.
| Symptom | Usual cause | Parts to check |
|---|---|---|
| Gate overruns or will not stop | Limit switch or limit nut worn | K23-40050, 13-40362, Limit Switch Kit K74-40347 |
| Motor runs, gate does not move | Sprocket or chain worn | Drive Sprocket Kit K75-40401, Idler Kit K75-40346, 19-41750 chain |
| Grinding or rumble under load | Gear box worn | AGS3016 gear box, Motor/Gear Box Kit K75-30350 |
| Batteries never reach full charge | Charge board or rectifier | K79-40370 charge board, Rectifier Kit K74-40084 |
| Gate slow or quits under load | Batteries at end of life | 29-NP712, 21-40359 12V transformer |
| No power at all | Main transformer or relay | 9596 transformer, 23595-73 relay |
| Manual release will not engage | Toggle switch or shaft assembly | 23-40357, Limit/Drive Shaft Kit K72-40359 |
| Ref | Part # | Description |
|---|---|---|
| 1 | 13-40362 | Limit Nut — no longer available |
| 2 | 20-40351 | Motor, 70V DC, 1/2 HP — no longer available |
| 3 | 9596 | Transformer, 120V 60Hz, 66V |
| 4 | K23-40050 | Limit Switch — no longer available |
| 5 | 23-40357 | Toggle Switch, SPST, Manual Release |
| 7 | 29-40355 | Resistor, 10 Ohm — no longer available |
| 8 | 29-40089 | Sonalert Piezo Alarm |
| 9 | 29-NP712 | Battery, 12V 7AH |
| 11 | 21-40359 | Transformer, 12V |
| 12 | 23595-73 | Relay, 12V DC (29-40376) |
| 13 | AGS3016 | Gear Box (32-40352) |
| Ref | Part # | Description |
|---|---|---|
| A | K72-40359 | Limit / Drive Shaft Assembly — no longer available |
| B | K74-40084 | Bridge Rectifier Assembly |
| C | K75-30350 | Motor / Gear Box with Sprocket — no longer available |
| D | K74-40347 | Limit Switch Service Kit — no longer available |
| F | K74-40065 | External Resistor Service Kit |
| G | K75-40346 | Idler Sprocket Service Kit |
| H | K75-40401 | Drive Sprocket Service Kit |
| I | K75-40403 | Reduction Sprocket Service Kit |
| Ref | Part # | Description |
|---|---|---|
| — | 19-41750 | Drive Chain, #41, 30 ft |
| — | 1A4283 | Limit Chain — no longer available |
| — | K79-40370 | Control Board, Battery Charge |
See also the SL920 parts page, or the full LiftMaster gate operator parts catalog.