The LiftMaster 041A5811 is a 6-tooth gear and sprocket replacement kit for select LiftMaster and Chamberlain chain drive garage door openers. It replaces the internal drive gear and sprocket components that transfer motor power to the chain and trolley system. This kit is used when the original gear assembly has worn out, stripped, cracked, or can no longer move the chain reliably.
This is a mechanical drive repair part, not an electronic control board. Common field symptoms include a motor that runs while the door does not move, white plastic gear shavings inside the opener cover, chain movement that slips or stops, grinding noise, or sprocket wobble. Gear failure is often caused by age and lubrication loss, but it can also happen early if the garage door is heavy, out of balance, binding, or has broken springs.
Compatible With
The 041A5811 kit is commonly associated with select LiftMaster and Chamberlain chain drive garage door openers that use a 6-tooth sprocket drive assembly. Compatibility depends on the opener model, drive type, sprocket tooth count, and parts diagram.
Common Compatible Products and Systems
- Select LiftMaster residential chain drive garage door openers
- Select Chamberlain residential chain drive garage door openers
- Select Sears Craftsman chain drive openers built by Chamberlain/LiftMaster when the parts diagram calls for 041A5811 or 41A5811
- Chain drive openers using a compatible 6-tooth sprocket assembly
- Older and serviceable chain drive opener heads with matching gear-and-sprocket layout
Not Compatible With
- LiftMaster belt drive garage door openers
- Chamberlain belt drive garage door openers
- Genie, Linear, Wayne Dalton, Marantec, or other non-Chamberlain-built openers
- Screw drive openers
- Wall-mount or jackshaft openers
- Openers using a different sprocket tooth count or gear kit
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster / Chamberlain |
| Product Type | Gear and Sprocket Kit |
| Part Number | 041A5811 |
| Sprocket Style | 6-tooth |
| Application | Drive gear and sprocket repair for select chain drive garage door openers |
| Compatible Operator Type | Select LiftMaster and Chamberlain chain drive openers |
| Includes | Gear and sprocket assembly, worm gear, and grease on common kit listings |
| Notes | Verify opener model, drive type, tooth count, and parts diagram before ordering. |
Also Known As / Related Part Numbers
- 041A5811
- 41A5811
- 062547
- LiftMaster 6-tooth gear and sprocket kit
- Chamberlain 6-tooth gear and sprocket kit
- Chain drive gear kit
- Garage door opener drive gear kit
Technician Note
Do not replace the gear kit until the door has been checked by hand. If the door is out of balance, binding, or has spring problems, the new gear can fail quickly. Check chain tension and the motor shaft area after installation.
Before Ordering, Confirm
- The opener is a compatible LiftMaster or Chamberlain chain drive model.
- The original gear kit uses the 6-tooth sprocket configuration.
- The door moves smoothly and is properly balanced by hand.
- The chain, trolley, rail, and sprocket area are not damaged.
- The part number 041A5811, 41A5811, or 062547 matches the parts diagram.
Professional Advisory
Disconnect power before servicing the opener and keep hands clear of the chain, sprocket, and motor assembly. After replacement, run the opener through full travel, check chain tension, adjust limits or force if needed, and test the safety reversal system.
Questions & Answers
What is included with the 041A5811 gear and sprocket kit?
The 041A5811 kit is commonly listed with the gear and sprocket assembly, worm gear, and grease for select compatible chain drive openers.
What does the 6-tooth sprocket mean?
The 6-tooth sprocket refers to the sprocket configuration used by this specific chain drive gear kit. The opener must use the matching sprocket and drive setup.
Will this kit fit belt drive or screw drive openers?
No. The 041A5811 is for select chain drive opener applications and should not be used on belt drive or screw drive openers unless a parts diagram specifically calls for it.
What symptoms can a worn gear and sprocket cause?
A worn gear and sprocket can cause the motor to run without moving the chain, grinding noise, white gear shavings, slipping, or failure to move the door.
What should be checked before replacing the kit?
Check the door balance, chain tension, rail condition, trolley, drive gear, and opener model. A binding or heavy door can damage a new gear kit.
