LiftMaster K75-12586 Brake Kit, GH, 575V
The LiftMaster K75-12586 is a 575V brake kit used on select LiftMaster GH commercial door operators. It is a voltage-specific brake assembly service kit for heavy industrial-duty gearhead operators and must be matched to the operator voltage and control generation.
This kit is typically used in industrial facilities where 575V service is present. Because 575V commercial door operators are high-voltage systems, the operator nameplate, wiring diagram, and original parts breakdown should be reviewed before ordering or installation.
What This Part Does
The brake kit helps stop and hold the operator drive after a run command. In a GH gearhead operator, it controls coasting and helps keep the door from moving after the motor stops.
A failed 575V brake may show as poor holding, coasting, brake chatter, solenoid failure, dragging, or failure to release. These symptoms must be diagnosed carefully because wiring faults, incorrect voltage, door imbalance, and control issues can look similar.
Compatible With
The K75-12586 is commonly associated with select LiftMaster GH commercial door operators that require a 575V brake kit. It should be selected only when the diagram and operator voltage confirm the 575V application.
Common Compatible Operator Families
- LiftMaster GH commercial door operators with 575V brake configuration
- Select Chamberlain/LiftMaster GH commercial operator equivalents using 575V brake assembly
- Select GH Logic 4.0 and prior applications using K75-12586
- Industrial-duty GH gearhead operators in 575V facilities
- Compatible GH brake assemblies where K75-12586 is shown in the parts breakdown
Related Voltage Families to Separate
- K75-12584 for 115V GH brake applications
- K75-12585 for 230V or 230-460V GH brake applications
- K75-12586 for 575V GH brake applications
- K75-36874-1 for later Logic 5.0 1-phase brake kit applications
- K75-36874-3 for later Logic 5.0 3-phase brake kit applications
- K71-B575 / 71-B575 related 575V internal brake service families where applicable
Important Compatibility Notes
- This is for 575V GH brake applications only.
- Confirm operator voltage at the nameplate and diagram before ordering.
- High-voltage brake service should be handled by qualified personnel.
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Brake Kit / Complete Brake Assembly |
| Part Number | K75-12586 |
| Voltage | 575V |
| Compatible Operator Type | Select GH commercial door operators |
| Application | 575V commercial operator stopping and holding brake service |
| Related Voltage Kits | K75-12584 115V; K75-12585 230V / 230-460V |
| Notes | Match voltage and control generation exactly. |
Also Known As / Related Part Numbers
This 575V brake kit may be listed by kit number, voltage, or related GH brake family references.
- K75-12586
- LiftMaster GH 575V brake kit
- Brake kit 575 volt models
- Complete brake assembly GH 575V
- Related kit: K75-12584 115V
- Related kit: K75-12585 230V / 230-460V
- Related kit: K71-B575
- Related kit: 71-B575
- Related kit: K75-36874-3 GH 3PH L5
Technician Note
575V brake kits should never be guessed from photos. Confirm the operator supply voltage, brake solenoid voltage, and control generation before ordering.
If a 575V brake solenoid failed, inspect wiring, control outputs, and mechanical brake movement. A seized brake or incorrect voltage can damage replacement components.
Before Ordering, Confirm
- Original diagram calls for K75-12586.
- Operator is a compatible GH commercial door operator.
- Brake voltage is confirmed as 575V.
- Wiring and control generation are verified.
- Brake release, stopping, and holding are tested after service.
Professional Advisory
These are commercial door operator mechanical or electrical brake parts. Disconnect power at the service disconnect before inspection or replacement and follow the operator manual for lockout, chain removal, brake adjustment, and return-to-service testing.
After installation, test the door only from a safe location with the opening in view. If the door is heavy, binding, out of balance, has damaged shafting, or does not stop correctly, have the system serviced by a qualified commercial door technician before normal use.
Important Ordering Warnings
- 575V systems are high-voltage commercial equipment.
- Do not install this kit on 115V, 230V, or 230/460V units.
- Incorrect brake voltage can cause serious equipment damage or unsafe operation.
Questions & Answers
What voltage is the K75-12586 brake kit?
K75-12586 is the 575V GH brake kit family.
What operators use this brake kit?
It is commonly used on select LiftMaster GH commercial door operators with 575V brake applications when the parts diagram calls for K75-12586.
Is this interchangeable with K75-12585?
No. K75-12585 is used for different voltage applications. Match the brake kit to the operator voltage and wiring diagram.
What comes in this type of brake kit?
Listings commonly describe the kit with brake hub, release lever, brake disk, springs, solenoid, solenoid cover, spacers, mounting plate, pressure plate, key, and fasteners depending on package.
Who should install a 575V brake kit?
A qualified commercial door technician or electrician familiar with high-voltage commercial operator systems should handle this installation.
