Liftmaster SL585 & SL585GL Slide Gate Parts
LiftMaster SL585 & SL585GL Replacement Parts
Genuine LiftMaster replacement parts for the SL585 and SL585GL commercial slide gate operators — the gear-reducer and clutch driven pad-mount slider with a brake solenoid. Use the exploded diagram above to find the key number for the part you need, then click any part number in the tables below.
Order the motor and brake solenoid by supply voltage. Ref 9 runs to seven motors from 1/2 to 1-1/2 HP across single and three phase, and Ref 1 splits three ways by voltage. Read the motor data plate before ordering either.
Gear reducer and clutch, not a V-belt. The SL585 drives through the K32-34792 30:1 reducer and a K39-34786 clutch disk. The SL575 is the V-belt machine — they share the cover, chain guard and idler shaft kits but little else.
Control box parts are on their own page — see SL575 / SL585 / SL595 control box parts.
Common SL585 Repairs
| Symptom | Usual cause | Parts to check |
|---|---|---|
| Gate slips or stalls under load | Clutch disk worn or out of adjustment | K39-34786 clutch disk, K75-34791 clutch kit |
| Motor runs but the gate does not move | Gear reducer | K32-34792 gear reducer, 30:1 |
| Gate coasts or will not hold position | Brake solenoid — match your voltage | K22-120 / K22-240 / K22-575-1, K75-10177 brake hub kit |
| Gate will not reset after an obstruction | Reset switch | K23-34815 reset switch, K74-34821 reset switch kit |
| Chain slack, jumping or noisy | Chain, sprocket or idler shaft worn | K19-48055MB chain, 15-50B12LGH sprocket, K75-34828 idler shaft kit |
| Operator dead, no board lights | Transformer or contactor | K21-3260-1 transformer, K03-8024-K reversing contactor |
| Condensation or cold-weather faults | Heater kit not fitted or failed | K50-18423 heater kit, 71-6532448 230V modification |
| Cannot release the gate by hand | Disconnect kit | K75-34790 disconnect kit, K10-30678 lock bar |
Gate Operator Repair & Service Parts
| Ref | Part # | Description |
|---|---|---|
| 1 | K22-120 | Brake Solenoid, 120V |
| 1 | K22-240 | Brake Solenoid, 240V |
| 1 | K22-575-1 | Brake Solenoid, 575V |
| 2 | K80-14414 | Feather Key Kit |
| 3 | K12-4164 | Flanged Bearing, Self-Aligning |
| 4 | 15-50B12LGH | Sprocket, 50B12, 1" Bore |
| 5 | K10-30678 | Lock Bar |
| 6 | K23-34815 | Reset Switch |
| 7 | K32-34792 | Gear Reducer, 30:1 |
| 8 | K39-34786 | Clutch Disk |
| 9 | K20-1050C-2P | Motor, 1/2 HP, 115/230V, 1PH, CF |
| 9 | K20-3050C-4P | Motor, 1/2 HP, 230/460V, 3PH, CF |
| 9 | K20-3050M-5 | Motor, 1/2 HP, 575V, 3PH, BM/CF |
| 9 | K20-1100C-2P | Motor, 1 HP, 115/230V, 1PH, CF |
| 9 | K20-1150C-2P | Motor, 1-1/2 HP, 115/230V, 1PH, CF (no longer available) |
| 9 | K20-3100C-4P | Motor, 1 HP, 230/460V, 3PH, CF |
| 9 | K20-3100M-5-H25 | Motor, 1 HP, 3PH, L5 |
| 10 | K23-20088 | On/Off Switch, 120VAC, 15A |
| 10 | K23-3001 | On/Off Switch, 125/277VAC, 20A |
| 10 | K23-3005 | On/Off Switch, 125/277VAC, 20A |
| 11 | 10-3504-B | Angle Bracket |
| 12 | K10-30681M1 | E-Box Bracket |
Parts Not Shown in Diagram
| Ref | Part # | Description |
|---|---|---|
| — | K03-8024-K | Reversing Contactor |
| — | K21-3260-1 | Transformer, 120/208/230/460, 60VA |
| — | K19-48055MB | Chain, #48 x 55 |
| — | K23-30716 | Stop Switch, 125VAC, 6A |
| — | 71-6532448 | Heater Kit Modification, 230V |
| — | K50-18423 | Heater Kit |
| — | K77-34846 | Hardware Kit, SL575 / SL585 / SL595 |
| — | K13-19441 | Vent Plug, SL585U |
| — | K35-310-032-1 | Fuse Kit |
Service Kits
| Ref | Part # | Description |
|---|---|---|
| K1 | K75-10177 | Brake Hub Kit |
| K2 | K75-34828 | Idler Shaft Kit |
| K3 | K75-34824 | Chain Guard Kit |
| K4 | K75-34842 | Cover, SL575 / SL585 |
| K5 | K75-34790 | Disconnect Kit, SL585 |
| K6 | K75-34791 | Clutch Kit, SL585 |
| K7 | K29-32410 | Alarm Kit |
| K8 | K75-18493 | Chain Guide Kit |
| K9 | K74-34821 | Reset Switch |