The LiftMaster 041A4836 is a drive sprocket replacement kit for select screw drive garage door opener rail assemblies. In a screw drive system, the opener motor turns a long threaded drive screw that moves the trolley. The drive sprocket and coupling area are key transfer points in that system, and wear here can create slipping, grinding, or inconsistent door travel.
This kit is most closely associated with Chamberlain screw drive and low-profile screw drive models, with the 3240 model appearing as a confirmed compatibility reference. It should be treated as a screw-drive-specific part and verified by model number, rail assembly, and parts diagram before ordering.
| Manufacturer | LiftMaster / Chamberlain Group |
|---|---|
| Product Type | Drive sprocket kit |
| Part Number | 041A4836 |
| Application | Screw drive rail drive sprocket service |
| Compatible Operator Type | Select screw drive residential garage door openers |
| Confirmed Model Reference | Chamberlain 3240 where applicable |
| Notes | Verify screw drive rail assembly before ordering |
If the opener motor runs but the trolley does not move correctly, inspect the coupler, sprocket, carriage, drive screw, and rail condition. A stripped drive component can be caused by door binding or lack of proper screw drive maintenance.
Opener drive repairs should not be used to compensate for a heavy or damaged garage door. If the door will not move smoothly by hand, have the door hardware serviced before replacing opener drive components.
It is used on select screw drive garage door opener rail assemblies, with Chamberlain 3240 listed as a confirmed model reference.
No. It is a screw drive sprocket kit and should not be used on belt drive opener gear assemblies.
Grinding, slipping, motor running without proper trolley movement, or uneven travel can point to drive sprocket or coupler wear.
Yes. 41A4836 is commonly used as the shortened version of LiftMaster part number 041A4836.
Yes. A heavy or binding door can damage drive components again after replacement.