LiftMaster K75-13334 GH Bevel Gear Service Assembly — 3/4-Inch ID, 3 HP Application
LiftMaster K75-13334 GH Bevel Gear Service Assembly — 3/4-Inch ID, 3 HP Application
The LiftMaster K75-13334 is the bevel-gear service assembly identified with a 3/4-inch inside diameter for the documented 3 HP GH commercial operator arrangement. Manufacturer parts drawings place the 75-13334 reference in the hand-chain shaft assembly. Match that exact gear position and service configuration rather than selecting any bevel gear with the same nominal bore. Select the replacement by the complete part number and the installed equipment configuration. A similar photograph or a shared LiftMaster brand name does not establish interchangeability. Confirm the applicable service drawing before ordering so the repair addresses the correct component and its related mounting, connection and operating requirements.
Compatibility — Models, Versions and Exclusions
| Model or selection point | Compatibility requirement |
|---|---|
| GH 3 HP configuration | Confirm the exact parts drawing and installed gear reference. |
| Hand-chain shaft arrangement | Identify the correct mating position before ordering. |
| 08-13333 adjacent gear | A separate gear reference; do not transfer its tooth specification automatically. |
| Other GH ratings | A shared family name or bore does not establish interchangeability. |
Identify the Assembly and Plan the Repair
The bevel gear must mesh correctly with the mating gear in the approved manual-hoist mechanism. Inspect the shaft, bearings, retention and tooth condition together. Replacing one gear without correcting a worn support or damaged mating component can leave the mechanism noisy, misaligned or unreliable.
The manufacturer drawing distinguishes 75-13334 from a nearby 08-13333 gear described with its own tooth count. Keep those callouts separate instead of transferring a specification from one row to another. Obtain the current kit contents and any missing dimensional information before dismantling the hoist, and follow the documented method for setup and lubrication.
Compare the replacement with the installed service arrangement before dismantling the equipment. Photograph the part’s location and record the complete model and visible service numbers. Inspect the surrounding attachment points and mating components for wear, impact damage or misalignment. Replacing one worn item will not correct a damaged support or another component that continues to impose abnormal loads on the repaired assembly.
Specifications and Product Identification
| Specification | Details |
|---|---|
| Ordering reference | K75-13334 |
| Component | Bevel gear service assembly |
| Inside diameter | 3/4 inch |
| Documented rating context | 3 HP GH arrangement |
| Drawing reference | 75-13334 |
| Assembly location | Hand-chain shaft mechanism in the documented drawing |
Before Ordering
- Record the full GH model and 3 HP service configuration.
- Locate 75-13334 in the hand-chain shaft drawing.
- Inspect the mating gear, shaft and bearings.
- Confirm current supplied components and the correct setup procedure.
Package Contents and Separate Requirements
This offer identifies the bevel-gear service assembly. Confirm the current gear and associated retention pieces supplied. A complete hand-chain shaft kit, mating gear, chain wheel, gearbox, motor and operator are not established as included merely because they appear together in an exploded drawing.
Safety Warnings — Read Before Installation or Service
- WARNING: A moving commercial door and exposed gh bevel gear service assembly — 3/4-inch id, 3 hp application can cause serious injury or death. Have a trained door-systems technician perform installation and service.
- Disconnect mains power and any battery backup before mechanical work or wiring. Secure the door against unexpected movement as directed by its manufacturer.
- Do not work on springs, cables or counterbalance components without appropriate training. Never bypass safety sensors or increase force to overcome binding.
- Restore guards and complete the model-specific travel, reversal and protection-device tests before returning the door to normal operation.
Related Products and Important Differences
- CPS-U monitored photo eyes — separate protection devices for approved commercial-door controls; match the operator and environment.
- TDC12X1BMC MAXUM trolley operator — a complete-operator comparison, not evidence that this legacy service part fits MAXUM.
Frequently Asked Questions
Is the 3/4-inch dimension the bore?
The documented description identifies a 3/4-inch inside diameter. Verify the actual shaft and complete gear geometry.
Is this the adjacent 24-tooth gear?
Do not assume so. The manufacturer gives 08-13333 a separate callout and tooth description.
Will it fit every GH operator?
No universal GH fit is claimed. Match the rating, installed assembly and exact service reference.
Does it include a complete manual hoist?
No. It identifies the bevel-gear service item; other hoist components require their own package and condition checks.
Need Help Confirming the Right Product?
Contact Garage-DoorParts.com before ordering. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.
Details
Need Help With Compatibility?
Not sure if this is the correct part for your garage door, operator, gate system, or application? Contact Us before ordering — we’re happy to help.
Garage-DoorParts.com carries a large selection of residential and commercial parts, and many components can look similar while having important differences in dimensions, model numbers, voltage, mounting, or compatibility.
For the best assistance, please provide as much information as possible, including the manufacturer, model number, part number, door or operator type, dimensions, and clear photos of the existing part or equipment.
Our goal is to help you identify the correct product before you order and reduce the possibility of ordering an incompatible part.
Contact Us with your product questions and compatibility information, and we’ll do our best to point you in the right direction.
Shipping & Returns
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We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.