Liftmaster HDSW24UL Swing Gate Parts
LiftMaster HDSW24UL Replacement Parts
Genuine LiftMaster replacement parts for the HDSW24UL heavy-duty variable speed swing gate operator — the 24 VDC brushless swing operator with battery backup and a 1600:1 gear reducer, built for high-cycle Class III and IV sites. Use the exploded diagram above to find the key number for the part you need, then click any part number in the tables below.
One build only. The HDSW24UL ships in a single 24 VDC configuration, so there are no voltage or phase variants to match — every part on this page fits every HDSW24UL.
Shares parts with the HDSL24UL slide operator: the boards, motor, motor drive, transformer, bridge rectifier, EMI board, dust guard and batteries are common to both. Parts named "HD Gates" fit either; parts named "HDSW24UL" are swing-specific.
Careful with the reset switch. This operator takes K41-0050-000; the slide-gate HDSL24UL takes K41-0048-000. Both carry an ID resistor that tells the board which operator it is, so they are not interchangeable.
The cover includes its lock, keys and labels — K41-0090-000. You do not need to order K75-36260 separately unless only the lock has failed.
Common HDSW24UL Repairs
| Symptom | Usual cause | Parts to check |
|---|---|---|
| Gate runs on mains but dies in a power cut | Backup batteries at end of life | 29-NP712 battery, K74-30762 battery pack |
| Gate will not reset after an obstruction | Reset switch or its ID resistor | K41-0050-000 reset with ID resistor |
| Operator dead, no lights on the board | Transformer, bridge rectifier or power switches | K41-0067-000, K41-0083-000, K41-0123-000 |
| Gate overruns or stops short | APS encoder not counting | K41-0092-000 APS encoder |
| Motor hums but the gate will not move | Gear reducer or motor drive board | K41-0066-000 gear reducer, K41-0095-000 motor drive |
| Cannot release the gate by hand | Cludge assembly or output shaft | K41-0085-000 cludge assembly, K41-0086-000 output shaft |
| No response to remotes, wired controls work | Antenna or its connecting wire | K41-0124-000 antenna and connecting wire |
| Accessories or loops not responding | Relay adapter or expansion board | K41-0072-000 relay adapter, K1D8387-1CC expansion |
Gate Operator Repair & Service Parts
| Ref | Part # | Description |
|---|---|---|
| 1 | K41-0086-000 | Output Shaft Assembly, HDSW24UL |
| 2 | K41-0085-000 | Cludge Assembly, HDSW24UL |
| 3 | K09-50119 | Output Arm, Q059 |
| 4 | K41-0138-000 | Standard Arm, HDSW24UL |
| 5 | 29-NP712 | Battery, 12V, 7AH |
| 6 | K74-30762 | Battery Pack, 12V, 7A, Qty 2 |
| 7 | K41-0092-000 | APS Encoder, HDSW24UL |
| 8 | K41-0083-000 | Bridge Rectifier, HD Gates |
| 9 | K41-0075-000 | Dust Guard, HD Slide |
| 10 | K41-0073-000 | HD Main Control Board |
| 11 | K41-0071-000 | HD Power Board |
| 12 | K41-0082-000 | HD Motor |
| 13 | K41-0095-000 | Motor Drive, HD Gates |
| 14 | K41-0067-000 | Transformer, HD Swing and Slide |
| 15 | K41-0066-000 | Gear Reducer, 1600:1, HDSW24UL |
| 16 | K41-0072-000 | Relay Adapter Board, HD |
| 17 | K1D8387-1CC | Expansion Board, UL325 |
| 18 | K41-0074-000 | Control Board Pivot Bracket and Slide |
| 19 | K41-0078-000 | EMI Board with Cover Kit, HD Gates |
| 20 | K1D7078 | EMI Board |
| 21 | K41-0090-000 | Cover, HDSW24UL — includes lock, keys and labels |
| 22 | K13-36117-1 | Cludge Cover |
| 23 | K75-36260 | Lock and Keys |
| 24 | K41-0124-000 | Antenna and Connecting Wire, HD |
Parts Not Shown in Diagram
| Ref | Part # | Description |
|---|---|---|
| — | K41-0047-000 | Wire Harness Kit, HD Gates |
| — | K41-0050-000 | Reset with ID Resistor, HDSW24UL |
| — | K41-0123-000 | Power Switches and Wire Harness, HD |
| — | K94-34778 | Board to Board Wire Harness, 24V |
| — | K41-0105-000 | Battery Tray, 33AH, HD |
| — | K41-0102-000 | Battery Harness, 33AH, HD Gates |
| — | 40-39235 | Warning Sign |