Liftmaster SL575 SL585 SL595 Control Box Parts
LiftMaster SL575, SL585 & SL595 Control Box Parts
Genuine LiftMaster replacement parts for the GL control box fitted to the SL575, SL575GL, SL585, SL585UL, SL595, SL595GL and SL595UL commercial slide gate operators. The same control box is used across all of them, so every part on this page fits any of those operators. Use the exploded diagram above to find the key number for the part you need, then click any part number in the table below.
Match the overload to your motor, not to the operator. The Ref 9 overload is sized to the motor's full-load current, so a 1/2 HP single-phase unit and a 2 HP three-phase unit take different overloads even though the box is identical. Read the amp rating off the existing overload before ordering.
The Ref 7 transformer also splits by supply — K21-3260-1 covers 120/208/230/460V, and 575V units take K76-33313.
This is the control box only. For the operator's mechanical parts see the SL575, SL585 and SL595 parts pages.
Common Control Box Repairs
| Symptom | Usual cause | Parts to check |
|---|---|---|
| Trips the overload repeatedly | Overload sized wrong for the motor | K25-2006 to K25-2015, K25-4002-5K, K25-4003-K |
| Operator dead, nothing at the board | Transformer — match your supply voltage | K21-3260-1 (120–460V), K76-33313 (575V) |
| Gate runs one direction only | Reversing contactor | K03-8024-K reversing contactor |
| No response to any input | Control board | K001A5566 GL control board |
| Gate overruns or stops short | Limit switch or limit nut | K23-10041 limit switch, K13-10024 limit nut, K72-34818 shaft kit |
| Open, close or stop buttons unresponsive | Switch failed | K23-30716 stop switch, K23-34822 open/close switch |
| Erratic travel or missed counts | Hall effect sensor | K74-18379 hall effect sensor kit |
| Loose or corroded field wiring | Terminal block | K42-120-1 terminal block, 20 position |
Control Box Repair & Service Parts
| Ref | Part # | Description |
|---|---|---|
| 1 | K13-10024 | Limit Nut |
| 2 | K23-10041 | Limit Switch, 10A, 125/250VAC |
| 3 | K03-8024-K | Reversing Contactor |
| 4 | K001A5566 | GL Control Board |
| 5 | K23-30716 | Stop Switch, 125VAC, 6A |
| 6 | K23-34822 | Open/Close Switch |
| 7 | K21-3260-1 | Transformer, 120/208/230/460, 60VA |
| 7 | K76-33313 | Transformer, 575V, 100VA |
| 8 | K001C3196-3 | Antenna, 315MHz |
| 9 | K25-2006 | Overload, 6A |
| 9 | K25-2008 | Overload, 8A |
| 9 | K25-2010 | Overload, 10A |
| 9 | K25-2015 | Overload, 15A |
| 9 | K25-4002-5K | Overload, 1.8-2.6A |
| 9 | K25-4003-K | Overload, 2.6-3.7A |
| 10 | K42-120-1 | Terminal Block, 20 Position |
Parts Not Shown in Diagram
| Ref | Part # | Description |
|---|---|---|
| — | K74-18379 | Hall Effect Sensor Kit |
| — | K77-34846 | Hardware Kit, SL575 / SL585 / SL595 |
Service Kits
| Ref | Part # | Description |
|---|---|---|
| K1 | K72-34818 | Limit Shaft Kit |