Liftmaster CSW24U CSW24V CSW24VDC Gate Parts
LiftMaster CSW24U, CSW24UL, CSW24V & CSW24VDC Replacement Parts
Genuine LiftMaster replacement parts for the CSW24 family of commercial swing gate operators — the 1/2 HP, 24 VDC pad-mount swing operator with a two-stage gear reducer and a cludge arm. Every generation shares the same motor, gear reducers, chassis, arms, e-box and transformer; they differ only in the control board, expansion board, cludge cover and operator cover.
Which generation do I have? Open the e-box and read the main control board:
K1D8389-1CC → CSW24U / CSW24UL (current UL325 generation)
K1D8059-1CC → CSW24VDC
K1D6597-1CC → CSW24V / CSW24VH
Rows below marked with a model name apply only to that generation. Everything else fits all of them.
Covers split three ways. CSW24U takes K77-37853, CSW24UL takes K77-39425, and the CSW24VDC and CSW24V both take K77-37181. The complete cover kits are K77-37856 (CSW24U) and K77-39428 (CSW24UL).
Straight or uphill gate? Ref 4 splits two ways — 75-50293 is the standard arm assembly, K75-50292 is the swivel arm for uphill or offset installations.
Common CSW24 Repairs
| Symptom | Usual cause | Parts to check |
|---|---|---|
| Gate runs on mains but dies in a power cut | Batteries at end of life | 29-NP712 battery, K74-30762 pack, K94-37205 harness |
| Motor runs but the gate does not move | Gear reducer or limit chain | K32-35814-1 and K32-34655-1 reducers, K19-50038 chain |
| Gate overruns or stops short | APS encoder not counting | K76-34644 APS encoder, K1A6408 APE kit |
| Gate will not reset after an obstruction | Reset switch or its ID resistor | K180A0357 reset switch, K94-36540 kit with resistor |
| Cannot release the gate by hand | Cludge arm clamp or release handle | K75-50121 clamp and handle kit, K75-50120 release arm kit |
| Operator dead, no board lights | Transformer, EMI board or bridge rectifier | K204C0211 transformer, K76-34728 EMI board, K52C0481 rectifier |
| Oil weeping from the gear reducer | Oil plug cap perished | K80-36545 kit, or K80-36782 / K80-36783 on the CSW24VDC |
| Play or knocking at the output | Output shaft and sprocket worn | K77-36539 output shaft kit, K15-50B18LKGH sprocket |
Gate Operator Repair & Service Parts
| Ref | Part # | Description |
|---|---|---|
| 1 | K13-36117-1 | Cludge Cover — CSW24U / CSW24VDC |
| 1 | K13-36117 | Cludge Cover — CSW24V / CSW24VH |
| 2 | K75-50120 | Release Arm Kit |
| 3 | K09-50119 | Output Arm, Q059 |
| 4 | 75-50293 | Standard Arm Assembly, Q104 |
| 4 | K75-50292 | Swivel Arm Assembly, Q103 |
| 5 | 29-NP712 | Battery, 12V, 7AH |
| 5 | K74-30762 | Battery Pack, 12V, 7AH, Qty 2 |
| 6 | K1A6408 | APE Kit, 24V |
| 7 | K77-36541 | Antenna |
| 8 | K13-34729 | E-Box Cover |
| 9 | K1D8389-1CC | Main Board, DC Pad-Mounts, UL325 — CSW24U / CSW24UL |
| 9 | K1D8059-1CC | Control Board — CSW24VDC |
| 9 | K1D6597-1CC | Control Board — CSW24V / CSW24VH |
| 10 | K1D8387-1CC | Expansion Board, UL325 — CSW24U / CSW24UL |
| 10 | K1D8080-1CC | Expansion Board — CSW24VDC |
| 10 | K1D6686CC | Expansion Board — CSW24V / CSW24VH |
| 11 | K76-34728 | EMI Board with Power Switch |
| 12 | K180A0357 | Reset Switch |
| 13 | K52C0481 | Bridge Rectifier Kit |
| 14 | K77-36542 | E-Box |
| 15 | K73-36109-1 | Chassis — CSW24U / CSW24UL |
| 15 | K73-36109 | Chassis — CSW24VDC / CSW24V |
| 16 | K94-35152 | Piezo Alarm |
| 17 | K10-36395 | Battery Tray |
| 18 | K32-35814-1 | Gear Reducer, Bottom — CSW24U / CSW24VDC |
| 18 | K32-35814 | Gear Reducer, Bottom — CSW24V |
| 19 | K32-34655-1 | Gear Reducer, 30:1, Top |
| 20 | K76-36398 | Motor, 1/2 HP, 24V |
| 21 | K204C0211 | Transformer |
| 22 | K19-50038 | Limit Chain, #50, Q140 |
| 23 | K77-37853 | Cover — CSW24U |
| 23 | K77-39425 | Cover — CSW24UL |
| 23 | K77-37181 | Cover — CSW24VDC / CSW24V |
| 24 | K75-36260 | Lock and Keys |
| 25 | K80-50295 | Access Door Keys, Qty 2 |
Parts Not Shown in Diagram
| Ref | Part # | Description |
|---|---|---|
| — | K94-36540 | Reset Switch with ID Resistor Kit |
| — | K94-37205 | Battery Harness, 7AH |
| — | K94-37236 | Battery Harness, 33AH, Solar |
| — | K80-36545 | Oil Plug Cap Kit |
| — | K94-34778 | Board to Board Harness, 24V |
| — | K1D8389-1CCU | Upgrade Kit with Eyes, DC Pad, UL325 |
| — | K94-36250 | Battery Wire Harness, 7AH — CSW24V |
| — | K94-36596 | Battery Wire Harness, 33AH — CSW24V |
| — | K80-36782 | Oil Plug Cap — CSW24VDC |
| — | K80-36783 | Oil Plug Cap — CSW24VDC |
Service Kits
| Ref | Part # | Description |
|---|---|---|
| K1 | K75-50121 | Cludge Arm Clamp and Handle Kit, Q061 |
| K2 | K77-36539 | Output Shaft and Sprocket Kit |
| K3 | K76-34644 | APS Encoder, 24V |
| K4 | K77-37856 | Cover Kit — CSW24U |
| K4 | K77-39428 | Cover Kit — CSW24UL |
| K5 | K15-50B18LKGH | Sprocket, 50B18T |