Swing Gate SW2000-B3,X3,B3P,X3P parts
LiftMaster SW2000 Swing Gate Operator Parts
Genuine replacement parts for the LiftMaster SW2000 commercial swing gate operator, covering the B3, X3, B3P and X3P builds. Use the exploded view above with the tables below to identify what you need, then click any part number to order.
Before you order — three things to check.
1. AC and DC motors are different assemblies. The 75-20028 motor assembly and the 76-20427 DC motor assembly with pulley are not interchangeable. Check which is fitted before ordering, and note that the DC assembly is no longer available.
2. There are three pulleys on this operator and they are different sizes. 17-20115 is the 2.5 inch, 17-20124 is the 7 inch, and 17-20425 is a further replacement pulley. The V-belt is the 31 inch 16-20077. Measure before ordering.
3. The quick release is available as individual parts or as a retro kit. 70-18494 is the arm cap assembly and 75-18479 is the hub assembly; 75-SW2QRR is the retrofit kit containing both, though it is no longer available. If you are replacing one worn part, order the individual assembly.
Part numbers shown as plain text rather than links are no longer available from the manufacturer. They are listed so you can identify what you have.
Common SW2000 Repairs
| Symptom | Usual cause | Parts to check |
|---|---|---|
| Motor runs, gate does not move | V-belt slipping or worn | 16-20077 belt, 17-20115 and 17-20124 pulleys |
| Chain loose or jumping | Tensioner or idler sprocket worn | 77-20155 tensioner kit, 15-40C17EX idler, 15-40B20JEF |
| Gate overruns or will not stop | Limit switch or limit cam worn | 23-20087, SN1601010 cam, 10-20046 bracket |
| Gate will not release by hand | Quick release worn or seized | 70-18494 arm cap, 75-18479 hub |
| Play or knocking in the drive | Output shaft or bearing worn | 11-18140, 12-20122 bearing, 72-18512 shaft assembly |
| Operator dead, no response | Control box assembly | 76-20018, 23-20088 DPST switch |
| Gate drifts on power loss | Power fail parts | G7720208 power fail kit — no longer available |
Operator Parts
| Ref | Part # | Description |
|---|---|---|
| 2 | 41-20066 | Control Box Cover |
| 3 | 76-20012 | Alarm Assembly with Bracket |
| 4 | 75-20028 | Motor Assembly |
| 5 | 17-20115 | Pulley, 2.5 in |
| 6 | 16-20077 | V-Belt, 31 in (AX29) |
| 7 | 23-20088 | DPST Switch |
| 8 | 76-20018 | Control Box Assembly — no longer available |
| 10 | 17-20124 | Pulley, 7 in |
| 11 | 15-40B20JEF | Sprocket, #40 chain, 20T, 7/8 in bore |
| 12 | 77-20155 | Chain Tensioner Kit Assembly |
| 13 | 15-40C17EX | Idler Sprocket — no longer available |
| 14 | 23-20087 | Limit Switch Only — no longer available |
| 15 | 10-20046 | Limit Switch Support Bracket |
| 16 | SN1601010 | Limit Cam Assembly — no longer available |
| 17 | 72-18512 | Shaft Assembly with Sprocket |
| 19 | 12-20122 | Pillow Block Bearing |
| 20 | K75-20029-G | Cover with Access Door Assembly |
| 21 | 70-18494 | Quick Release Arm Cap Assembly |
| 22 | 75-18479 | Quick Release Arm Cap Hub Assembly — no longer available |
| 24 | 80-18468 | Lock Assembly |
| 26 | 11-18140 | Output Shaft |
Arm, Linkage and Hardware
| Ref | Part # | Description |
|---|---|---|
| — | 10-20050 | Swing Arm Extension |
| — | SN3010062 | Gate Linkage, 40 in |
| — | K75-20015 | Rod End Assembly |
| — | 08-20052 | Gate Anchor |
| — | 19-4001M | Master Link, #40 |
| — | 17-20425 | Pulley |
| — | 75-SW2QRR | Quick Release Retro Kit — includes both assemblies, no longer available |
| — | K77-20020 | Accessory Hardware — no longer available |
Motor and Power
| Ref | Part # | Description |
|---|---|---|
| — | 76-20427 | DC Motor Assembly with Pulley — no longer available |
| — | G7720208 | Power Fail Parts Kit — no longer available |
See also the full LiftMaster gate operator parts catalog.