LiftMaster 41A481 Sheave Bracket Assembly – Full-Chain Operators
LiftMaster 41A481 Sheave Bracket Assembly – Full-Chain Operators
The LiftMaster 41A481 Sheave Bracket Assembly is a replacement front pulley and bracket assembly for compatible LiftMaster full-chain garage door openers manufactured from 1990 to the present.
Mounted at the front end of the opener’s T-rail, the assembly supports and guides the drive chain as it travels through the rail. Replace the assembly when the original bracket is bent, damaged, loose, excessively worn, or no longer allows the chain to move and tension correctly.
Product Details
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Manufacturer: LiftMaster
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Part number: 41A481
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Product type: Sheave and pulley bracket assembly
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Drive type: Full-chain garage door opener
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Rail type: Compatible T-rail
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Application: Residential garage door opener
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Compatibility period: Select models manufactured from 1990 to the present
Common Symptoms of a Worn Assembly
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Chain rubbing or traveling unevenly
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Excessive chain slack
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Grinding or rattling near the front of the rail
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Damaged or misaligned pulley
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Bent or loose front bracket
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Difficulty maintaining correct chain tension
Important Compatibility Information
This assembly is intended for compatible full-chain operators and is not designed for belt-drive, screw-drive, or incompatible chain-drive rail systems. Confirm the opener model, rail design, and original part number before ordering.
Installation Advisory
Disconnect electrical power before servicing the opener. Keep the garage door closed and inspect the chain, trolley, rail, and drive sprocket for additional wear before installing the replacement assembly. Adjust the chain according to the opener manufacturer’s instructions and avoid overtightening it.
Order the LiftMaster 41A481 Sheave Bracket Assembly to restore proper chain alignment and smooth operation to a compatible full-chain garage door opener.
Details
Need Help With Compatibility?
Not sure if this is the correct part for your garage door, operator, gate system, or application? Contact Us before ordering — we’re happy to help.
Garage-DoorParts.com carries a large selection of residential and commercial parts, and many components can look similar while having important differences in dimensions, model numbers, voltage, mounting, or compatibility.
For the best assistance, please provide as much information as possible, including the manufacturer, model number, part number, door or operator type, dimensions, and clear photos of the existing part or equipment.
Our goal is to help you identify the correct product before you order and reduce the possibility of ordering an incompatible part.
Contact Us with your product questions and compatibility information, and we’ll do our best to point you in the right direction.
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