LiftMaster 041A4836 Screw Drive Sprocket Kit
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.
Compatible With
- Chamberlain 3240 1/2 HP AC screw drive garage door opener where the parts diagram specifies 041A4836
- Select Chamberlain screw drive garage door opener rail assemblies using the matching drive sprocket kit
- Select low-profile screw drive garage door opener models when confirmed by parts diagram
- LiftMaster or Chamberlain screw drive applications that list 041A4836 or 41A4836
- Not compatible with chain drive, belt drive, RJO wall-mount, or gate operator drive systems
Features and Specifications
| Manufacturer | LiftMaster / Chamberlain Group |
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| Product Type | Drive sprocket kit |
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| Part Number | 041A4836 |
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| Application | Screw drive rail drive sprocket service |
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| Compatible Operator Type | Select screw drive residential garage door openers |
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| Confirmed Model Reference | Chamberlain 3240 where applicable |
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| Notes | Verify screw drive rail assembly before ordering |
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Also Known As / Related Part Numbers
Technician Note
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.
Before Ordering
- Verify that the opener is a screw drive model
- Confirm 041A4836 or 41A4836 in the opener parts diagram
- Inspect the drive screw and trolley/carriage for wear
- Do not use on chain or belt drive openers
- Confirm the door is balanced and moves freely before replacing drive parts
Professional Advisory
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.
Important Ordering Warnings
- Official model detail is strongest for Chamberlain 3240; other screw drive applications should be confirmed by diagram
- Do not confuse this screw drive sprocket kit with chain drive gear and sprocket kits
Product Questions and Answers
What type of opener uses LiftMaster 041A4836?
It is used on select screw drive garage door opener rail assemblies, with Chamberlain 3240 listed as a confirmed model reference.
Is 041A4836 used on belt drive openers?
No. It is a screw drive sprocket kit and should not be used on belt drive opener gear assemblies.
What symptoms can point to a worn drive sprocket?
Grinding, slipping, motor running without proper trolley movement, or uneven travel can point to drive sprocket or coupler wear.
Is 41A4836 the same as 041A4836?
Yes. 41A4836 is commonly used as the shortened version of LiftMaster part number 041A4836.
Should the door balance be checked before replacing this part?
Yes. A heavy or binding door can damage drive components again after replacement.
