Part of the EZ Parts Finder: pick a part on the diagram or use the list below.
Find parts for the LiftMaster RSL12UL residential slide gate operator on the interactive diagram. Click a part and its part number appears. You can also use the list that follows. The views show the cover and reset switch, the front with antenna and receptacle, the control board, the drive side with the output sprocket and the gear box with motor and encoder.
Identify your model
The RSL12UL is LiftMaster's 12 Vdc residential slide operator. The board's diagnostic display shows SL followed by 12 for the RSL12UL operator type. It comes with one 7AH battery, with a 33AH battery as an option. Batteries should be replaced every 3 years.
Related models: LiftMaster SL585, LiftMaster SL3000UL, LiftMaster CSL24UL, LiftMaster IHSL24UL
Operator and manuals
- Operator: Liftmaster RSL12UL 1/2HP 12dc Residential Slide Gate Operator
- RSL12UL installation manual (PDF)
- RSL12UL product guide (PDF)
- RSL12UL spec sheet (PDF)
Most ordered parts
- Liftmaster K75-50090 IDLER PULLEY, Q013 (K75-50090)
- Liftmaster K1D8389-1CC MAIN BOARD, DC PAD-MOUNTS, UL 325 (K1D8389-1CC)
- Liftmaster K77-37857 COVER, GRAY, RSL12U (K77-37857)
- Liftmaster K16-GT2-7 TIMING BELT (K16-GT2-7)
- Liftmaster K76-34697-3 APS ENCODER WITH HARNESS, 12V (K76-34697-3)
- Liftmaster K76-37253 MOTOR, 1/8HP, 12VDC (K76-37253)
- Liftmaster K77-36541 ANTENNA (K77-36541)
Parts list by assembly
Cover
| Part number | Part |
|---|---|
| K77-37857 | Liftmaster K77-37857 COVER, GRAY, RSL12U |
| K180A0357 | Liftmaster K180A0357 RESET SWITCH |
Front
| Part number | Part |
|---|---|
| K77-36541 | Liftmaster K77-36541 ANTENNA |
| K76-37016 | Liftmaster K76-37016 RECEPTACLE |
Control Board
| Part number | Part |
|---|---|
| K1D8389-1CC | Liftmaster K1D8389-1CC MAIN BOARD, DC PAD-MOUNTS, UL 325 |
Drive Side
| Part number | Part |
|---|---|
| K75-50090 | Liftmaster K75-50090 IDLER PULLEY, Q013 |
| K15-41B16GKEH | Liftmaster K15-41B16GKEH OUTPUT SPROCKET |
| K32-34701-5 | Liftmaster K32-34701-5 GEAR REDUCER |
Gear Box
| Part number | Part |
|---|---|
| K76-37253 | Liftmaster K76-37253 MOTOR, 1/8HP, 12VDC |
| K16-GT2-7 | Liftmaster K16-GT2-7 TIMING BELT |
| K76-34697-3 | Liftmaster K76-34697-3 APS ENCODER WITH HARNESS, 12V |
| K17-37318 | Liftmaster K17-37318 GEAR REDUCER AND MOTOR PULLEY KIT |
| K76-37298 | Liftmaster K76-37298 ALARM WITH WIRE HARNESS |
Common questions
What size gate can the RSL12UL run?
LiftMaster rates it for gates up to 800 lb, with 25 to 50 ft of gate travel and up to 120 cycles per day.
How often should the RSL12UL battery be replaced?
LiftMaster says the batteries should be replaced every 3 years.
How do I release the RSL12UL to move the gate by hand?
Press the reset switch to RESET/DISCONNECT, then release the handle on the operator arm. Use the release only when the gate is not moving.