Liftmaster RSL12U RSL12UL RSL12VDC Gate Parts
LiftMaster RSL12U, RSL12UL & RSL12VDC Replacement Parts
Genuine LiftMaster replacement parts for the RSL12U, RSL12UL and RSL12VDC residential slide gate operators — the 12 VDC, 1/8 HP belt-drive pad-mount slider built for single-family driveways. All three share the same chassis, motor, gear reducer, belt and sprocket; they differ only in the control board and the cover. Use the diagram above to find the key number, then click any part number to go straight to that product.
Which operator do I have?
This page — RSL12U / RSL12UL / RSL12VDC: belt drive, control board mounted inside the operator housing, no external control box.
Not this page — RSL12V / RSL12VH: chain drive with a limit chain and a separate wall-mounted control box. Those parts are on the LiftMaster RSL12V & RSL12VH parts page.
Gate Operator Repair & Service Parts
| Ref | Part # | Description |
|---|---|---|
| 1 | K16-GT2-9 | Drive Belt |
| 2 | K76-37253 | Motor, 1/8 HP, 12 VDC |
| 3 | K76-34697-3 | APS Encoder with Harness, 12V |
| 4 | K15-41B16GKEH | Output Sprocket |
| 5 | K32-34701-5 | Gear Reducer |
| 6 | K76-37298 | Alarm with Wire Harness |
| 7 | K73-37060 | Chassis |
| 8 | K180A0357 | Reset Switch |
| 9 | K77-37335 | E-Box |
| 10 | K77-36541 | Antenna |
| 11 | K1D8389-1CC | Main Board, DC Pad-Mounts, UL325 — RSL12U / RSL12UL |
| 11 | K1D8059-1CC | Control Board — RSL12VDC (pre-UL325) |
| 12 | K13-34729 | E-Box Cover |
| 13 | APOW3 | Transformer |
| 14 | K76-37016 | Receptacle |
| 15 | K77-37855 | Cover — RSL12U (no longer available) |
| 15 | K77-37857 | Cover, Gray — RSL12U |
| 15 | K77-39427 | Cover, Gray — RSL12UL |
| 15 | K13-37061 | Operator Cover with Labels — RSL12VDC |
Parts Not Shown in Diagram & Accessories
| Ref | Part # | Description |
|---|---|---|
| — | K07-50637 | Chain Bolt, Q003 |
| — | K1A6408 | APE Kit, 24V |
| — | K74-30762 | Battery Pack, 12V, 7A |
| — | 77-36764 | Crank Bracket Kit (no longer available) |
| — | K94-37259 | Wiring Harness Kit, RSL 12VDC |
| — | K94-37230 | Battery Wire Harness, 7AH |
| — | 19-41240D | Drive Chain, #41, 10 ft — RSL12VDC |
| — | 19-50307 | Master Link, #41 — RSL12VDC |
| — | Q004 | Chain Bracket — RSL12VDC |
| — | MPEL | Post-Mount Plate |
| — | 29-NP712 | Battery, 12V 7AH |
| — | K94-37236 | Battery Harness, Solar |
Service Kits
| Ref | Part # | Description |
|---|---|---|
| K1 | K17-37318 | Gear Reducer and Motor Pulley Kit |
| K2 | K75-50090 | Idler Pulley Kit, Q013 |