LiftMaster K75-18323 Chain Wheel Assembly Kit
The LiftMaster K75-18323 chain wheel assembly kit services the hand-chain wheel area on select GH 5HP commercial door operators. This is the mechanical portion the operator relies on when the hoist chain is used for manual operation during service, power loss, or operator disengagement.
On a high-horsepower GH operator, the chain wheel area must mesh cleanly with the hand chain and related shaft components. Worn chain wheel teeth, damaged bearings, missing shims, or loose retaining hardware can make the hand chain bind, skip, or fail to operate the manual hoist smoothly.
This kit should be treated as a GH 5HP service kit, not a universal chain wheel. The GH 5HP parts breakdown shows K75-18323 as the chain wheel assembly kit and lists component references for the hand chain guide, nyliner bearing, chain wheel assembly, shim washer, and E-ring.
Compatible With
Use this kit on GH 5HP commercial door operators where the parts diagram identifies K75-18323 as the chain wheel assembly kit.
- LiftMaster Model GH 5HP commercial door operators
- GH 5HP heavy industrial-duty gearhead hoist operators
- Select GH 5HP repair parts pages showing K75-18323 chain wheel assembly kit
- Commercial overhead door operators using the matching GH 5HP hand-chain wheel assembly
Do not assume compatibility with standard H, J, HJ, MJ, MH, GT, GSD, SD, or lower-horsepower GH operators without matching the parts diagram.
Also Known As / Related Part Numbers
The main kit number and useful component references include:
- K75-18323
- 75-18323
- 7518323
- K75-18323 Chain Wheel Kit
- K75-18323 Chain Wheel Assembly Kit
- 10-10882 Hand Chain Guide
- 12-10883 Nyliner Bearing
- 75-10884 Chain Wheel Assembly
- 80-10022 Shim Washer
- 87-E-075 E-Ring, 3/4 inch
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Chain wheel assembly kit |
| Part Number | K75-18323 |
| Application | Manual hoist chain wheel section |
| Compatible Operator Type | GH 5HP commercial door operators |
| Related Components | Hand chain guide, bearing, chain wheel, shim washer, E-ring |
| Notes | Match to GH 5HP parts diagram before ordering |
Technician Note
A worn chain wheel may be only one part of a larger hoist issue. Check the hand chain shaft kit, engagement lever assembly, brake release linkage, and chain/brake release kit so the manual hoist and brake release work together correctly.
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.
- Verify the operator is a GH 5HP model, not a standard GH or other commercial operator family.
- Inspect the hand chain and guide for wear before replacing the chain wheel assembly.
- Confirm whether the brake release linkage also needs service.
Professional Advisory
Manual hoist repairs on commercial doors should be tested carefully after installation. The door must remain balanced, controlled, and safely operable by hand chain before the operator is returned to service.
Product Questions & Answers
What does the K75-18323 kit repair?
It repairs the chain wheel assembly area of select LiftMaster GH 5HP commercial door operators.
Is K75-18323 the same as the hand chain shaft kit?
No. K75-18323 is the chain wheel assembly kit. The hand chain shaft kit is a separate GH 5HP part number, K75-18324.
Can I use this kit on a standard LiftMaster GH operator?
Only if the parts diagram for that exact operator calls for K75-18323. It is commonly tied to GH 5HP applications.
What symptoms can point to this kit?
A hand chain that slips, binds, or does not track correctly around the chain wheel can point to wear in this assembly, but the shaft and brake linkage should also be checked.
Does this kit include the brake release cable?
No. Brake release and chain/brake release components are separate from the chain wheel assembly unless the parts diagram states otherwise.
