LiftMaster K75-13344 Chain/Brake Release Kit
The LiftMaster K75-13344 chain/brake release kit is used in the release linkage area of select GH 5HP commercial door operators. Its job is to support the mechanical release action so the hand-chain/manual operation and brake-release function work together the way the operator was designed.
This is a small but important safety-related mechanical kit. If the release cable, spring, sleeve, S-hooks, or mounting hardware are worn or missing, the operator may not release properly for manual operation, or the brake may not coordinate correctly with the hoist system.
The GH 5HP parts breakdown shows K75-13344 separately from the chain wheel assembly and hand chain shaft kit. That separation matters because replacing the wrong kit may not fix the symptom and could leave the manual-release system operating incorrectly.
Compatible With
Use K75-13344 where the GH 5HP parts list calls for the chain assembly/brake release kit.
- LiftMaster GH 5HP heavy industrial-duty gearhead hoist operators
- Select GH 5HP commercial door operator release linkage assemblies
- GH 5HP manual operation and brake release systems using K75-13344
- Applications where the parts diagram identifies K75-13344 Chain Assy / Brake Release Kit
Do not use this kit as a substitute for K75-18323 chain wheel kit, K75-18324 hand chain shaft kit, or K75-18075 chain/cable sash kit unless the diagram specifically calls for that alternate kit.
Also Known As / Related Part Numbers
Useful cross-reference and component numbers include:
- K75-13344
- 75-13344
- 7513344
- K75-13344 Chain Brake Release Kit
- K75-13344 Chain Assy / Brake Release Kit
- 18-18190 Safety Draw-Bar Extension Spring
- 80-11646 Double Sleeve
- 80-1012 S-Hook
- 82-18077 Hex Bolt-Modified
- 84-FN31 Hex Nut, Serrated Flange 5/16-18
- 85-FW-31 Flat Washer For 5/16 Bolt
- 96-3575 Braided Cable
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Chain/brake release kit |
| Part Number | K75-13344 |
| Application | Manual release and brake release linkage |
| Compatible Operator Type | GH 5HP commercial door operators |
| Related Components | Spring, sleeve, S-hook, cable, bolt, nut, washer |
| Notes | Keep separate from chain wheel and hand chain shaft kits |
Technician Note
If this kit is being replaced because the operator will not release, inspect the engagement lever, brake release arm, hand chain shaft kit, and brake assembly. A missing spring or stretched cable can look like a brake problem even when the brake parts are still usable.
Before Ordering
- Match the exact part number on the operator parts diagram or the removed part whenever possible.
- Confirm the operator model, horsepower, voltage, phase, and production series before ordering.
- Check nearby brake, clutch, chain, shaft, and hardware components for wear so the new part is not damaged by another failed component.
- Do not substitute similar-looking commercial operator parts unless the LiftMaster parts breakdown confirms the same item number.
- Confirm K75-13344 is the release kit shown in the GH 5HP diagram.
- Inspect the release cable path and any mounting brackets for damage or misrouting.
- After replacement, test manual operation and brake release before powered cycling.
Professional Advisory
Do not bypass or defeat release interlocks, brake components, or safety controls to make a commercial door operate. If the release system does not function correctly, stop use and have the operator serviced.
Product Questions & Answers
What does K75-13344 do?
It services the chain/brake release linkage on select LiftMaster GH 5HP commercial door operators.
Is this the same as K75-18324?
No. K75-18324 is the hand chain shaft kit. K75-13344 is the chain/brake release kit.
Can a bad release kit keep the hand chain from working?
Yes, damaged release linkage can affect manual operation, but the chain wheel, hand chain shaft, brake assembly, and door balance should also be checked.
Does this kit include the chain wheel?
No. The chain wheel assembly is normally tied to K75-18323.
What should be tested after installation?
The manual release, hand chain operation, brake release, interlock operation, and full powered open/close cycle should be checked safely.
