Liftmaster 11-10987 Clutch Shaft, MH
The LiftMaster 11-10987 clutch shaft is a replacement shaft used in the drive train of MH medium-duty hoist commercial door operators. The shaft provides the mounting and rotation point for clutch-related parts in the operator drive section. When the shaft is worn, bent, grooved, or damaged, the operator may have poor clutch alignment, uneven drive engagement, or mechanical noise in the hoist assembly.
This item should be ordered when the parts breakdown calls for the individual MH clutch shaft. It should not be confused with larger clutch shaft kits, MHS kit assemblies, or H/HJ industrial-duty shafts. If the clutch disc, chain wheel, springs, bushings, or hardware are also worn, review the full operator parts diagram to decide whether an individual shaft or a complete kit is the better repair.
What This Part Does
- Provides the rotating shaft for the MH operator clutch/drive section.
- Helps maintain proper alignment of the clutch and sprocket components.
- Replaces a worn or damaged shaft when the rest of the clutch assembly is still serviceable.
Compatible With
Known compatibility and application references found during this review include:
- LiftMaster MH medium-duty hoist commercial door operators.
- MH5011 style 115V medium-duty hoist applications where the parts diagram calls for 11-10987.
- Commercial hoist operator drive/clutch assemblies where the diagram identifies this individual shaft.
- Not an automatic replacement for MHS clutch shaft kit K72-33858, H shaft 11-19471, HJ shaft 11-19473, or Model J/H clutch shaft kits.
Also Known As / Related Part Numbers
Use these references to compare old labels, supplier listings, and part searches:
- 11-10987
- K11-10987
- LIF-11-10987
- LiftMaster clutch shaft, MH
- MH clutch shaft
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Clutch shaft |
| Part Number | 11-10987 |
| Application | MH medium-duty hoist operator clutch/drive section |
| Compatible Operator Type | Commercial medium-duty hoist door operator |
| Includes | Individual clutch shaft reference unless listing states otherwise |
| Related Family | MH series |
| Notes | Not the same as a complete clutch shaft kit or H/HJ industrial-duty shaft. |
Technician Note
Inspect the clutch disc, chain wheel, bearings, bushings, sprockets, springs, and fasteners while the shaft is exposed. Replacing the shaft alone may not solve slipping or noise if the surrounding clutch parts are worn.
Before Ordering
- Confirm the parts diagram calls for 11-10987.
- Verify the operator is an MH medium-duty hoist model.
- Inspect the old shaft for scoring, bending, or worn keyways.
- Check surrounding clutch parts before ordering only the shaft.
- Do not substitute H, HJ, MHS, or J shafts without a matching parts diagram.
Professional Advisory
Mechanical clutch and hoist repairs should be performed with the operator power disconnected and the door secured. If the door is heavy, unbalanced, or unsafe, have a qualified commercial door technician service the system.
Product Questions
Is 11-10987 a complete clutch kit?
No. It is the MH clutch shaft reference. A complete kit may include additional springs, washers, bearings, sprockets, and hardware depending on the operator.
Which operator family uses this shaft?
It is associated with LiftMaster MH medium-duty hoist commercial door operators.
No. K72-33858 is a clutch shaft kit associated with MHS operators. Match the operator model and diagram before ordering.
What symptoms can point to a bad clutch shaft?
Mechanical noise, poor clutch alignment, wobble, shaft scoring, damaged keyways, or slipping that remains after clutch adjustment can point to shaft wear.
Should I replace other clutch parts at the same time?
Often it is worth inspecting them. Worn clutch discs, springs, bushings, sprockets, or hardware can cause the same symptoms as a damaged shaft.
