Liftmaster IHSL24UL Slide Gate Parts
LiftMaster IHSL24UL Replacement Parts
Genuine LiftMaster replacement parts for the IHSL24UL industrial slide gate operator — the 24 VDC brushless heavy-industrial slider with battery backup, built for the highest duty cycles LiftMaster rates. Use the exploded diagram above to find the key number for the part you need, then click any part number in the tables below to go straight to that product.
Do not order INSL24UL parts for this operator. The IHSL24UL and the lighter INSL24UL look similar and share their boards, but the motor, gear reducer, transformer, sprockets and drive board are all different — and the part numbers differ by a single digit.
Anything ending IHSL24UL in the description below is specific to this operator. Parts marked INSL24UL / IHSL24UL fit both.
Battery options: the standard build takes two 12V 7AH batteries (K74-30762). For extended backup, the 33AH pack (A12330SGLPK) also needs the K10-36183 tray.
Common IHSL24UL Repairs
| Symptom | Usual cause | Parts to check |
|---|---|---|
| Runs on mains but dies in a power cut | Backup batteries at end of life | K74-30762 battery pack, 29-NP712 battery |
| Gate stops short or overruns | Limit system or its encoder | K41-0247-000 limit system, K41-0246-000 encoder |
| Motor hums but the gate will not move | Gear reducer or BLDC drive board | K41-0252-000 gear reducer, K41-0245-000 drive board |
| Chain noise, jumping or slack | Sprockets or idler bracket worn | K41-0243-000 output sprocket, K41-0240-000 idlers |
| Operator dead, no board lights | Transformer or bridge rectifier | K41-0241-000 transformer, K41-0083-000 rectifier |
| No response from accessories or inputs | Relay adapter or expansion board | K41-0072-000 relay adapter, K1D8387-1CC expansion |
| Gate bracket loose on the gate frame | U-bolts stretched or corroded | K305-803002 U-bolt kit, K10-3209 gate bracket |
Gate Operator Repair & Service Parts
| Ref | Part # | Description |
|---|---|---|
| 1 | K41-0073-000MC | Main Control Board |
| 2 | K41-0245-000 | BLDC Power / Motor Drive Board, IHSL24UL |
| 3 | K1D8387-1CC | Expansion Board, UL325 |
| 4 | K41-0072-000 | Relay Adapter Board |
| 5 | K1D7078 | EMI Board |
| 6 | K41-0240-000 | Idler Sprocket, Qty 2, IHSL24UL |
| 7 | K41-0248-000 | Alarm, INSL24UL / IHSL24UL |
| 8 | K10-3209 | Gate Bracket Kit |
| 9 | K305-803002 | U-Bolt Kit, Qty 4 |
| 10 | K41-0083-000 | Bridge Rectifier |
| 11 | K41-0243-000 | Output Sprocket, IHSL24UL |
| 12 | K41-0254-000 | Motor, IHSL24UL |
| 13 | K41-0241-000 | Transformer, IHSL24UL |
| 14 | K41-0252-000 | Gear Reducer, IHSL24UL |
| 15 | K41-0247-000 | Limit System, INSL24UL / IHSL24UL |
| 16 | K77-38105 | C Clamp Kit, Qty 2 |
| 17 | K74-30762 | Battery Pack, 12V, 7AH, Qty 2 |
| 17 | 29-NP712 | Battery, 12V, 7AH, Qty 1 |
| 18 | A12330SGLPK | 33AH Battery with Harness |
| 19 | K41-0246-000 | Limit System Encoder, IHSL24UL / INSL24UL |
| 20 | K41-0256-000 | Interlock Harness, IHSL24UL |
Parts Not Shown in Diagram
| Ref | Part # | Description |
|---|---|---|
| — | K10-36183 | Battery Tray for 33AH Battery, 12V |
| — | K41-0257-000 | Harness Kit, INSL24UL / IHSL24UL |
| — | K94-34778 | Board to Board Wire Harness, 24V |
| — | 19-50307 | Master Link, #41 |
| — | K77-36764 | Crank Bracket Kit |
| — | K07-50637 | Chain Bolt, Q003 |
| — | K41-0249-000 | Power Control and Relay Board Plate |
| — | K41-0250-000 | Expansion Board and Terminal Block Plate |
| — | K41-0259-000 | Chain Guard, INSL24UL / IHSL24UL |
| — | K41-0258-000 | Idler Bracket Kit, INSL24UL / IHSL24UL |
| — | 19-3025 | Chain, #50 x 471, without Master Link |
| — | K10-30699-1 | Chain Mounting Bracket with Cover |
Accessories
| Ref | Part # | Description |
|---|---|---|
| — | LMRRUL | Retro Reflective Photo Eye, Monitored |
| — | S505AL | Small Profile Edge, 5 ft Aluminum Channel |
| — | MRIN | Riser Mount for Industrial Operators |