Liftmaster INSL24UL Slide Gate Parts
LiftMaster INSL24UL Replacement Parts
Genuine LiftMaster replacement parts for the INSL24UL industrial slide gate operator — the 24 VDC brushless industrial slider with battery backup, sitting a duty class below the heavier IHSL24UL. 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 IHSL24UL parts for this operator. The INSL24UL and the heavier IHSL24UL share their boards, but the motor, gear reducer, transformer, sprockets and drive board are all different — and most of those part numbers differ by a single digit.
Anything ending INSL24UL in the description below is specific to this operator. Parts marked INSL24UL / IHSL24UL fit both.
Watch the transformer. It is the one part that does not follow the one-digit pattern: INSL24UL takes K41-0346-000, IHSL24UL takes K41-0241-000.
Common INSL24UL 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 | K41-0251-000 gear reducer, K41-0244-000 drive board |
| Chain noise, jumping or slack | Sprockets or idler bracket worn | K41-0242-000 output sprocket, K41-0239-000 idlers |
| Operator dead, no board lights | Transformer or bridge rectifier | K41-0346-000 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 | K41-0244-000 | BLDC Power / Motor Drive Board, INSL24UL |
| 3 | K1D8387-1CC | Expansion Board, UL325 |
| 4 | K41-0072-000 | Relay Adapter Board |
| 5 | K1D7078 | EMI Board |
| 6 | K41-0239-000 | Idler Sprocket, Qty 2, INSL24UL |
| 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 | K41-0242-000 | Output Sprocket, INSL24UL |
| 12 | K41-0253-000 | Motor, INSL24UL |
| 13 | K41-0346-000 | Transformer, INSL24UL |
| 14 | K41-0251-000 | Gear Reducer, INSL24UL |
| 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 | K41-0255-000 | Interlock Harness, INSL24UL |
Parts Not Shown in Diagram
| Ref | Part # | Description |
|---|---|---|
| — | K10-36183 | Battery Tray for 33AH Battery, 12V |
| — | K41-0102-000 | 33A Battery Adapter Harness Kit |
| — | K41-0257-000 | Harness Kit, INSL24UL / IHSL24UL |
| — | K94-34778 | Board to Board Wire Harness, 24V |
| — | 19-41240D | Drive Chain, #41, 10 ft |
| — | 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 |
| — | 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 |