LiftMaster K71-D1PH 120V Single Phase Drum Brake Kit
The LiftMaster K71-D1PH is an internal solenoid drum brake replacement kit for select 120V single-phase LiftMaster industrial-duty commercial door operators. The brake assembly helps stop and hold the door where the application requires controlled braking instead of allowing the operator drive system to coast freely.
This type of brake kit is commonly used on heavier commercial doors, rolling steel doors, grilles, and industrial applications where door inertia must be controlled. A worn or failed brake can cause drifting, delayed stopping, excessive coasting, or unreliable holding depending on the door and operator setup.
This is a voltage- and generation-sensitive repair kit. It should be matched to the operator model, wiring diagram, Logic generation, brake style, and parts diagram before ordering.
Common Use Cases
- Replacing a failed 120V single-phase internal drum brake kit
- Adding or replacing a brake on supported Logic 5.0 industrial-duty operators
- Correcting door coast, drift, or delayed stopping caused by brake wear
- Servicing heavy commercial doors where controlled stopping and holding are required
- Replacing brake components after solenoid, cable, drum, or mounting hardware failure
Compatible With
The K71-D1PH kit is commonly listed for select LiftMaster Logic 5.0 industrial-duty operators. Confirm model, voltage, phase, and parts diagram before ordering.
- Select LiftMaster Logic 5.0 Model T industrial-duty commercial door operators
- Select LiftMaster Logic 5.0 Model SD industrial-duty commercial door operators
- Select LiftMaster Logic 5.0 Model J industrial-duty commercial door operators
- Select LiftMaster Logic 5.0 Model H industrial-duty commercial door operators
- Select LiftMaster Logic 5.0 Model HJ industrial-duty commercial door operators
- Select 120V single-phase applications where the parts diagram calls for K71-D1PH
- Select DH, DHJ, or DJ listings only where the operator parts diagram specifically confirms this kit
Not Intended For
- Three-phase operators requiring K71-D3PH or another 3PH brake kit
- Operators requiring 208V, 230V, 460V, or 575V brake kits unless this exact part is listed
- APT brake applications that call for K76-37077 or another APT brake kit
- Residential garage door openers or light-duty operators
- Door problems caused by balance, spring, guide, bearing, or curtain issues rather than brake failure
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Internal solenoid drum brake kit with cable |
| Part Number | K71-D1PH |
| Voltage / Phase | 120V single phase |
| Application | Brake replacement or brake add-on for select industrial-duty commercial door operators |
| Compatible Operator Type | Select LiftMaster Logic 5.0 T, SD, J, H, and HJ industrial-duty operators |
| Included Components | Solenoid cover, brake solenoid, brake drum, cable, mounting plate, installation hardware |
| Function | Provides controlled stopping and holding for supported operators |
| Notes | Verify operator voltage, phase, brake type, and parts diagram before ordering. |
Also Known As / Related Part Numbers
- LiftMaster K71-D1PH
- K71-D1PH
- K71 D1PH
- 71-D1PH
- 120V Drum Brake Kit
- 120V Single Phase Drum Brake Kit
- Internal Solenoid Drum Brake with Cable
- K71-EB1PH
- 71-EB1PH
Related brake kits that are not automatically interchangeable: K71-D3PH, K71-D575-1, K71-B1PH, K71-B3PH, 71-B120, K76-37077, and older caliper-style brake parts. Match voltage, phase, model, and brake style before ordering.
Technician Note
Brake kit selection must match the operator voltage and phase. Installing the wrong brake kit can damage components or prevent the operator from stopping correctly.
If the brake is being added to an operator that did not originally have one, follow the manufacturer wiring modification instructions and confirm the operator is approved for the brake installation.
Before Ordering, Confirm
- The operator parts diagram calls for K71-D1PH.
- The operator is a supported LiftMaster Logic 5.0 industrial-duty model.
- The operator power is 120V single phase.
- The door type and load require an internal drum brake style kit.
- The existing brake style, wiring harness, conduit, and mounting arrangement have been checked.
- Door balance, springs, guides, and bearings are in serviceable condition.
Professional Advisory
Brake kits involve electrical wiring and moving commercial door equipment. Installation should be performed by a qualified commercial door technician familiar with LiftMaster industrial operators.
After installation, test braking action, limits, travel, door balance, safety devices, and emergency manual operation before returning the operator to service.
Product Q&A
Is K71-D1PH a single-phase brake kit?
Yes. K71-D1PH is a 120V single-phase internal solenoid drum brake kit for select LiftMaster industrial-duty commercial door operators.
Which LiftMaster models commonly use K71-D1PH?
It is commonly listed for select Logic 5.0 T, SD, J, H, and HJ industrial-duty operators, with final fitment based on the operator parts diagram.
Can K71-D1PH replace a three-phase brake kit?
No. Three-phase applications typically require a different brake kit, such as K71-D3PH or another voltage-specific part.
What is included with the kit?
The kit is commonly listed with a solenoid cover, brake solenoid, brake drum, cable, mounting plate, and installation hardware.
