Liftmaster SW470 & SW470GL Swing Gate Parts
LiftMaster SW470 & SW470GL Replacement Parts
Genuine LiftMaster replacement parts for the SW470 and SW470GL commercial swing gate operators — the 1/2 HP belt-and-chain driven swing operator with an adjustable arm channel. 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.
The diagram is grouped into lettered assemblies. A is the arm assembly and D is the drive train; plain numbers are the housing and control box. The tables below follow the same grouping.
Two motor options. D10 splits by supply: K20-2100 is the current 1/2 HP single-phase motor; the 208/230V 20-2101-LD is no longer available.
Capacitor depends on voltage too — Ref 13 is K29-10338 or the 20uF 230V K29-12110.
Not an SW470? The SW420 is the lighter 1/3 HP model and the SW490 is the heavier one; the three share very few parts.
Common SW470 Repairs
| Symptom | Usual cause | Parts to check |
|---|---|---|
| Motor runs but the gate does not move | Drive belt slipping or chain worn | K16-2101 belt, K19-2153 chain, K17-G0475 pulley |
| Gate overruns or stops short | Limit switch or limit collar | K23-2016 limit switch, 75-G0089 limit collar |
| Motor hums but will not start | Motor capacitor | K29-10338 or K29-12110 capacitor |
| Operator dead, no board lights | Transformer, contactor or control board | K21-3260-1 transformer, K03-8024-K contactor, K001A5566 board |
| Erratic travel or missed counts | Hall effect sensor | K74-18382 hall effect sensor kit |
| Play or knocking at the arm | Bearings or arm hub worn | K12-3000 flanged bearing, 07-2101 arm hub, 07-2103M arm stop |
| Grinding from the drive train | Gear reducer or sprockets | K32-2100 gear reducer, 15-2142 and 15-40B12-EEF sprockets |
| No warning tone before the gate moves | Alarm kit | K74-18655 alarm kit |
Arm Assembly (A)
| Ref | Part # | Description |
|---|---|---|
| A1 | 10-2108-T | Arm Channel — no longer available |
| A2 | K10-2109 | Arm Extension |
| A3 | K10-2111 | Gate Bracket |
| A4 | 07-2101 | Arm Hub |
| A5 | K12-3000 | Flanged Bearing, 1-1/4" x 1/8" |
| A6 | 07-2103M | Arm Stop |
| A7 | K80-2103 | Tinner-Man Nut |
Drive Train (D)
| Ref | Part # | Description |
|---|---|---|
| D1 | K11-2101 | Shaft |
| D2 | K12-4164 | Flanged Bearing, Self Aligning |
| D3 | 15-2142 | Sprocket, 40B42T, 1" x 1/4" |
| D4 | 15-40B12-EEF | Sprocket, 40B12T, 5/8" |
| D5 | K16-2101 | Belt, 3L250 |
| D6 | 17-6017 | Pulley |
| D7 | K17-G0475 | Pulley, 6" x 5/8" |
| D8 | K19-2153 | Chain, #40 x 53, No ML |
| D9 | K19-40ML | Master Link, #40 |
| D10 | K20-2100 | Motor, 1/2 HP, 1PH |
| D10 | 20-2101-LD | Motor, 208/230V, 1PH, 1/2 HP — no longer available |
| D11 | K32-2100 | Gear Reducer, 30:1 |
| D12 | 75-G0089X | Limit Collar — supplied as 75-G0089 |
Housing and Control Box
| Ref | Part # | Description |
|---|---|---|
| 1 | 10-2013 | Mounting Bracket |
| 2 | 10-2103-T | Reducer Bracket — no longer available |
| 3 | 10-2104-T | Motor Bracket — no longer available |
| 4 | K10-G0326 | Switch Box Cover |
| 5 | 10-G0387 | Sensor Support Bracket — no longer available |
| 6 | K23-3001 | On/Off Switch, 125/277VAC, 20A |
| 7 | K74-18382 | Hall Effect Sensor Kit |
| 8 | K74-18655 | Alarm Kit |
| 9 | 10-18461 | Side Cover |
| 10 | K001A5566 | GL Control Board |
| 11 | K21-3260-1 | Transformer, 120/208/230/460, 60VA |
| 12 | K23-2016 | Limit Switch |
| 13 | K29-10338 | Motor Capacitor |
| 13 | K29-12110 | Capacitor, 20uF, 230V |
| 14 | K03-8024-K | Reversing Contactor |
Parts Not Shown in Diagram
| Ref | Part # | Description |
|---|---|---|
| — | K75-18364 | Arm Assembly Kit |