Liftmaster SL575 & SL575GL Slide Gate Parts
LiftMaster SL575 & SL575GL Replacement Parts
Genuine LiftMaster replacement parts for the SL575 and SL575GL commercial slide gate operators — the V-belt driven pad-mount slider with a brake solenoid and chain drive. 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 six motors across 1/2 and 1 HP in single and three phase, and Ref 1 splits three ways: K22-120 for 120V, K22-240 for 240V, K22-575-1 for 575V. Read the motor data plate before ordering either.
The internal brake solenoid is a separate part. K1 covers K71-B120, K71-B240 and K71-B575 — do not confuse these with the Ref 1 external solenoids.
The SL575 is a V-belt machine. The SL585 uses a gear reducer and clutch instead and shares very little with it, though the cover, chain guard and idler shaft kits are common.
Control box parts are on their own page — see SL575 / SL585 / SL595 control box parts.
Common SL575 Repairs
| Symptom | Usual cause | Parts to check |
|---|---|---|
| Motor runs but the gate does not move | V-belt slipping or glazed | K16-5L304 V-belt, K17-6014 pulley |
| Gate coasts or will not hold position | Brake solenoid — match your voltage | K22-120 / K22-240 / K22-575-1, or the K1 internal solenoids |
| Gate will not reset after an obstruction | Reset switch | K23-34815 reset switch |
| Chain slack, jumping or noisy | Chain, sprocket or idler shaft worn | K19-48047M chain, K15-19478 sprocket, K75-34828 idler shaft kit |
| Grinding or play at the output | Bearing or output shaft worn | K12-4164 flanged bearing, K72-34844 output shaft kit |
| Gate slips under load | Clutch shaft worn | K72-34845 clutch shaft kit |
| No warning tone before the gate moves | Alarm kit | K29-32410 alarm kit |
| Cannot secure or release the operator | Lock bar or disconnect hardware | K10-30678 lock bar, K77-34846 hardware kit |
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 | K80-9001 | Feather Key |
| 3 | K12-4164 | Flanged Bearing, Self-Aligning |
| 4 | K15-19478 | Sprocket, 48B32T, 1-1/2" Bore |
| 5 | K10-30678 | Lock Bar |
| 6 | K23-34815 | Reset Switch |
| 7 | K16-5L304 | V-Belt, 30-1/32" |
| 8 | K17-6014 | Pulley, 2" OD, 5/8" Bore |
| 9 | K20-1100B-2P | Motor, 1 HP, 115/230V, 1PH, BM |
| 9 | K20-1050B-2P | Motor, 1/2 HP, 115/230V, 1PH, BM |
| 9 | K20-3050B-4P | Motor, 1/2 HP, 230/460V, 3PH, BM |
| 9 | K20-3100B-4P | Motor, 1 HP, 230/460V, 3PH, BM |
| 9 | K20-3050M-5 | Motor, 1/2 HP, 575V, 3PH, BM/CF |
| 9 | K20-3100M-5-H25 | Motor, 1 HP, 3PH, L5 |
| 10 | K23-3001 | On/Off Switch, 125/277VAC, 20A |
| 10 | K23-3005 | On/Off Switch, 125/277VAC, 20A |
| 11 | 10-3504-B | Angle Bracket |
Parts Not Shown in Diagram
| Ref | Part # | Description |
|---|---|---|
| — | K19-48047M | Chain, #48 x 47 |
| — | K001C3196-3 | Antenna, 315MHz |
| — | K77-34846 | Hardware Kit, SL575 / SL585 / SL595 |
| — | K19-48049MB | Chain, #48 x 49 |
| — | K23-30716 | Stop Switch, 125VAC, 6A |
Service Kits
| Ref | Part # | Description |
|---|---|---|
| K1 | K71-B120 | Internal Brake Solenoid, 120V |
| K1 | K71-B240 | Internal Brake Solenoid, 240V |
| K1 | K71-B575 | Internal Brake Solenoid, 575V |
| K2 | K75-34824 | Chain Guard Kit |
| K3 | K75-34828 | Idler Shaft Kit |
| K4 | K75-34842 | Cover, SL575 / SL585 |
| K5 | K29-32410 | Alarm Kit |
| K6 | K75-19977 | Arm Kit |
| K7 | K72-34844 | Output Shaft Kit |
| K8 | K72-34845 | Clutch Shaft Kit |
| K9 | K75-18493 | Chain Guide Kit |