Genuine LiftMaster replacement parts for the GH series heavy industrial-duty gear-reduced hoist operator. The GH5011 is the most common version — 1/2 HP, 115V, single phase. Use the exploded diagram to identify your part by its key number, then match it to the tables below.
The GH is built in more horsepowers than any other LiftMaster commercial operator — 1/2 through 3 HP — and several parts change with the horsepower band rather than the voltage. The gear reducer, the bevel gears and the hand chain shaft kit all differ, so check your horsepower before ordering those. Your model number is on the operator’s data label: the first two digits are horsepower and the last two are voltage and phase, so GH5011 is 1/2 HP at 115V single phase and GH3023 is 3 HP at 208/230V three phase.
The 5 HP GH is a different machine with its own parts list — see our GH 5HP page.
1/2 HP — most common: GH5011 (115V, 1PH), GH5021 (230V, 1PH), GH5023 (208/230V, 3PH), GH5043 (460V, 3PH), GH5053 (575V, 3PH), GH5025 (230V, 50Hz)
3/4 HP: GH7511, GH7521, GH7523, GH7543, GH7553
1 HP: GH1011, GH1021, GH1023, GH1043, GH1053
1-1/2 HP: GH1511, GH1521, GH1523, GH1543, GH1553
2 HP: GH2023, GH2043, GH2053
3 HP: GH3023, GH3043, GH3053
Logic 5.0 units: GH501L5, GH503L5, GH505L5, GH751L5, GH753L5, GH755L5, GH101L5, GH103L5, GH105L5
| Ref | Part # | Description |
|---|---|---|
| 1 | K22-120 | Brake Solenoid, 120V |
| 1 | K22-35704 | Brake Solenoid, 208V |
| 1 | K22-240 | Brake Solenoid, 240V |
| 1 | K22-575-1 | Brake Solenoid, 575V |
| 1 | K22-36899 | Brake Solenoid, 1PH, L5 |
| 1 | K22-36900 | Brake Solenoid, 3PH, L5 |
| 2 | K80-9001 | Key, 1/4" x 1/4" x 1" |
| 3 | K32-11009 | Gear Reducer, 45:1 — 1/3 to 1 HP |
| 3 | K32-11010 | Gear Reducer, 44:1 — 1-1/2 to 2 HP |
| 3 | K32-11011 | Gear Reducer, 45:1 — 3 HP |
| 4 | K15-48B18PJH | Sprocket, 48B18T, 1-3/16" B x 5/16" |
| 4 | K15-48B18QGH | Sprocket, 48B18, 1-1/4" x 1/4" — 3 HP |
| 5 | K15-50B12PJH | Sprocket, 50B12T, 1-3/16" B x 5/16" |
| 5 | 15-80B9QGH | Sprocket, 80B9, 1-1/4" x 1/4" — 3 HP |
| 6 | K10-11021 | Disconnect Lever, GH |
| 7 | 08-11012 | Bevel Gear, 5/8" ID |
| 7 | K75-13334 | Bevel Gear, 3/4" — 3 HP |
| 8 | K08-11013 | Bevel Gear, 3/4" ID |
| 9 | K72-12789 | Hand Chain Shaft Kit — 1/2 to 2 HP |
| 9 | K75-14661 | Hand Chain Shaft Kit — 3 HP |
| 10 | K12-10883 | Nylon Bearing |
| 12 | K12-10029 | Flange Bearing, 3/4" x 1-1/4" x 5/8" |
| 13 | K18-11008 | Compression Spring |
| 15 | K10-10191-GR | Brake Disc |
| 16 | K18-10194 | Compression Spring |
| — | K94-36992 | Brake Cable Harness, 1PH, L5 |
| — | K94-36994 | Brake Cable Harness, 3PH, L5 |
| — | K75-12783 | Disconnect Kit, GH |
| — | K23-10916 | Interlock Switch, 125/250VAC, 15A, SPDT |
| Ref | Part # | Description |
|---|---|---|
| K1 | K75-12584 | Brake Kit, 115V |
| K1 | K75-12585 | Brake Kit, 230V |
| K1 | K75-12586 | Brake Kit, 575V |
| K1 | K75-36874-1 | Brake Kit, 1PH, L5 |
| K1 | K75-36874-3 | Brake Kit, 3PH, L5 |
| K1 | K71-B575-1 | Internal Brake Solenoid, 575V |
| K2 | K75-10177 | Brake Hub Kit |
| K3 | K72-12789 | Hand Chain Shaft Kit — 1/2 to 2 HP |
| K3 | K75-14661 | Hand Chain Shaft Kit — 3 HP |
| K4 | K75-30737 | Disconnect Kit |
| K5 | K75-12829 | Gear Reducer Kit, 115V, 1 HP |
| K5 | K75-12830 | Gear Reducer Kit, 230/460V, 1 HP |
| K5 | K75-12832 | Gear Reducer Kit, 230/460V, 2 HP |
| K5 | K75-12834 | Gear Reducer Kit, 230/460V, 3 HP |
| — | K75-36875-1 | Gear Housing Kit, 1PH, L5 |
| — | K75-36875-3 | Gear Housing Kit, 3PH, L5 |
| — | K77-36826 | Gear Housing, 3 HP, 3PH, L5 |
| — | 71-659212 | Clutch Kit, GH |
| — | K19-10929-25 | Chain, Hand, 353 Pitch, No ML, 25 ft |
The motor’s part number is printed on the motor’s own data label. If you can reach it, read the number straight off the label and match it below — that is the most reliable way to order the right motor. TEFC motors are the NEMA 4/12 enclosure versions.
| Model | Volts | Ph | Part # |
|---|---|---|---|
| GH501L5 | 115/230 | 1 | K20-1050C-2LP-H26 |
| GH503L5 | 230/460 | 3 | K20-3050C-4P-H24 |
| GH505L5 | 575 | 3 | K20-3050M-5-H25 |
| GH751L5 | 115/230 | 1 | K20-1075C-2LP-H27 |
| GH753L5 | 230/460 | 3 | K20-3075C-4P-H25 |
| GH755L5 | 575 | 3 | K20-3075M-5-H25 |
| GH101L5 | 115/230 | 1 | K20-1100C-2LP-H28 |
| GH103L5 | 230/460 | 3 | K20-3100C-4P-H25 |
| GH105L5 | 575 | 3 | K20-3100M-5-H25 |
Note: LiftMaster’s 2023 guide repeats the 3/4 HP part numbers under its 1-1/2 HP Logic 5.0 heading, so we have not listed motors for GH151L5, GH153L5 or GH155L5. Contact us with your serial number and we will confirm the correct motor.
Electrical box parts. The GH uses the same control boxes as the T, GT, APT, SD and GSD. Use the section that matches your unit’s control generation.
| Ref | Part # | Description |
|---|---|---|
| 1 | K13-10024 | Limit Nut |
| 2 | K23-10041 | Limit Switch, SPDT, 10A, 125/250VAC |
| 3 | K75-35627 | E-Box Cover — GH, GT, T, GSD |
| 4 | K21-14182 | Transformer, 120/240V, 24VAC, 20VA |
| 4 | K21-35057 | Transformer, 460V, 24VAC |
| 4 | K21-35077 | Transformer, 575V, 24VAC |
| 5 | K29-31244 | Relay, DPST, 24V, 30A |
| 5 | K29-31245 | Relay, 12V, 30A |
| 6 | K29-31229 | Relay, 24VDC, 30A, SPDT, 1PH |
| 7 | K74-31243 | MOV Kit, L5, 1PH/3PH |
| 8 | K79-15016-1 | RPM Sensor Kit |
| 9 | K001A6837 | Logic Board, L4 |
| 10 | K002A0761 | Receiver Coaxial Cable, 315MHz |
| 11 | K001C3196-3 | Antenna, 315MHz |
| 12 | K42-31247 | Terminal Block, 3 Position, 600V, 20A |
| 13 | K42-10040 | Terminal Block, 3 Position |
| — | K74-MODELH | Main Wire Harness |
| K1 | K72-10047 | Limit Shaft Assembly Kit |
| K1 | K72-10047-1 | Limit Switch Shaft Kit |
| K2 | K72-12515-1 | Limit Switch Kit |
| Ref | Part # | Description |
|---|---|---|
| 1 | K13-10024 | Limit Nut |
| 2 | K23-10041 | Limit Switch, SPDT, 10A, 125/250VAC |
| 3 | K75-36914 | Cover for Current Sense Kit — GT, GH, L5 |
| 4 | K21-14182 | Transformer, 120/240V, 24VAC, 20VA |
| 4 | K21-36793 | Transformer, 208/230/460V, 20VA |
| 4 | K21-35077 | Transformer, 575V, 24VAC |
| 5 | K74-31243 | MOV Kit, L5, 1PH/3PH |
| 6 | K79-15016-1 | RPM Sensor Kit |
| 7 | K001D8395MC | Logic Board, 1PH/3PH, Current Sense Ready L5 |
| 8 | K002A0761 | Receiver Coaxial Cable, 315MHz |
| 9 | K001C8103-1 | Antenna |
| 10 | K001D8396-1 | Power Board, 115/230V, 1PH, L5 |
| 10 | K001D8397 | Power Board Kit, 3PH, L5 |
| 10 | K001D8397-1 | Power Board Kit, 575V, L5 |
| 11 | K21-38158 | Current Sense Harness, 3PH, L5 |
| — | K94-36934 | Main Wiring Harness, L5 |
| K1 | K72-10047 | Limit Shaft Assembly Kit |
| K2 | K72-12515-1 | Limit Switch Kit |
| Ref | Part # | Description |
|---|---|---|
| 1 | K03-35711 | Contactor Relay, 24V, 2NO+2NC |
| 2 | K21-7115-1 | Transformer, 115/230V, 1PH |
| 2 | K21-7460 | Transformer, 240/480V, 3PH |
| 2 | K21-7460-1 | Transformer, 230/460V, 3PH |
| 2 | K21-7575 | Transformer, 575V, 24VAC |
| 2 | 21-7575-1 | Transformer, 575V, 3PH |
| 3 | K001A6837 | Logic Board, L4 |
| 4 | K52C0481 | Bridge Rectifier Kit |
| 5 | K74-31243 | MOV Kit, L5, 1PH/3PH |
| 6 | K42-31247 | Terminal Block, 3 Position, 600V, 20A |
| 7 | K23-10041 | Limit Switch, SPDT, 10A, 125/250VAC |
| 8 | K72-12515-1 | Limit Switch Kit |
| 9 | K13-10024 | Limit Nut |
| 10 | K79-15016-1 | RPM Sensor Kit |
| 11 | K72-33192 | Limit Shaft Kit |
| 12 | K75-35815 | Enclosure, 1PH, N4 |
| 12 | K75-35816 | Enclosure, 3PH, N4 |
| 13 | K29-ABC-2 | Fuse, 250V, 2A |
| 14 | K74-19499 | Antenna |
| 15 | AUXCARD | Option Card Aux Relay Kit |
| Ref | Part # | Description |
|---|---|---|
| 1 | K03-8024-K | Reversing Contactor |
| 2 | 10-13900M1 | E-Box — GH, GSD |
| 3 | K75-14347 | E-Box Cover |
| 4 | K21-5115 | Transformer, 115/240V |
| 4 | K21-5230 | Transformer, 208/240V, 24VAC, 40VA |
| 4 | K21-5460 | Transformer, 460V |
| 5 | K23-10916 | Interlock Switch, 125/250VAC, 15A, SPDT |
| 6 | K24-24-1 | Relay, 24V, 10A |
| 7 | K24-115-1 | Relay, 120V, 10A |
| 7 | K24-230-5 | Relay, 3PDT, 230V, 7A |
| 8 | K25-2006 | Overload, 6A |
| 8 | K25-2008 | Overload, 8A |
| 8 | K25-2010 | Overload, 10A |
| 8 | K25-2015 | Overload, 15A |
| 8 | K25-2020 | Overload, 20A |
| 9 | K25-4002-5K | Overload, 1.8-2.6A |
| 9 | K25-4003-K | Overload, 2.6-3.7A |
| 9 | K25-4004-K | Overload, 3.7-5.5A |
| 9 | K25-4008-K | Overload, 5.5-8.0A |
| 9 | K25-4011-5K | Overload, 8.0-11.5A |
| 10 | K42-10040 | Terminal Block, 3 Position |
| 11 | K42-110 | Terminal Block, 10 Position, 600V, 30A |
| 12 | 25-3000-K | Overload Bracket |
| — | K72-14130-1 | Limit Shaft Kit — H, J, GH |
| — | K19-48033M | Chain, #48 x 33, with ML |