LiftMaster 041A2780 Chain Pulley Bracket Kit

The LiftMaster 041A2780 is a replacement front chain-pulley and bracket assembly for compatible LiftMaster and Chamberlain chain-drive garage door openers. Installed at the header end of the rail, it supports the chain pulley and helps maintain proper chain alignment and tension.

Also referenced as 41A2780, 1A2780, 1B3214, 1C2762 and 41B3214.

Features

• Replacement chain-pulley bracket kit

• Mounts at the front or header end of the opener rail

• Supports the chain idler pulley

• Helps maintain correct chain alignment and tension

• Factory-style replacement for compatible chain-drive rail systems

• Suitable for replacing a bent bracket, worn pulley or damaged bearing point

Compatibility

Used with select LiftMaster and Chamberlain chain-drive garage door openers, including properly matched:

• LiftMaster ATS operators

• LiftMaster 2595

• LiftMaster 3595

• Other chain-drive openers whose parts diagram specifies 041A2780

Compatibility depends on the opener model, rail design, chain configuration and original bracket number. Do not substitute this assembly for a belt-drive pulley bracket or a different full-chain sheave assembly.

Related repair part: LiftMaster 041C4220A Chain-Drive Gear and Sprocket Assembly

Common Failure Symptoms

• Grinding or rattling near the header end of the rail

• Chain rubbing against the rail or bracket

• Pulley does not turn freely

• Chain repeatedly loses tension

• Bent or cracked front bracket

• Visible pulley or bearing wear

Package Contents

• Chain-pulley bracket assembly

• Pulley and factory-associated service hardware supplied with the current kit

Chain, rail, trolley and header mounting bracket are not included unless specifically stated.

Installation & Safety

Disconnect opener power and close the garage door before servicing the rail. Release chain tension before removing the bracket. Inspect the chain, trolley, rail and drive sprocket for additional wear.

After installation, adjust chain tension according to the opener manual. Excessive chain tension can damage the pulley, sprocket, rail or motor bearings.