Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.
Craftsman garage door opener chain sprocket.
This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener.
Step by step instructions included free tech support available see video compatibility.
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41a5585 1 liftmaster chain drive gear and sprocket for 3 4 hp 4 30 71.
For diy parts replacement projects on older garage door openers we have craftsman liftmaster kits designed for operators made between 1984 and 2000.
Belt rail extension kit.
Garage door gear and sprocket kit replacement for liftmaster 41c4220a fits chamberlain sears craftsman 1 3 and 1 2 hp chain drive models replaces part numbers.
A list of compatible openers accompanies each part.
41c4220a 41a2817 gear sprocket assembly replacement.
This is a video on how to change the gear sprockets in a craftsman garage door opener.
Gear and sprocket assembly 41c4220a is an original equipment manufacturer oem part that fits most craftsman 139 series chain drive garage door openers manufactured after 1993.
We carry sears craftsman garage door opener lens covers made for use only with craftsman door operators.
Craftsman garage door openers are trusted to do what you need them to do.
Belt rail extension kit.
Assembly also fits chamberlain chain drive garage door opener models 1240r 1245r 1246r 1255r and 1256r.
Chain rail extension kit.
If the chain was installed too tightly on the garage door opener it can make opening the door more difficult for the automatic opener.
Amazon s choice for craftsman garage door sprocket replacement for liftmaster 41c4220a gear and sprocket kit fits chamberlain sears craftsman 1 3 and 1 2 hp chain drive models 4 8 out of 5 stars 1 216.
If the gear and sprocket assembly breaks the motor runs but the door won t move.
1 2 hp chain drive garage door opener kit.
For example our liftmaster 41c4220a chain drive gear and sprocket assembly can replace worn gears and sprockets on a sears craftsman garage door opener a liftmaster operator or a chamberlain opener.
This excess tension causes the gear that moves the chain to grind down.
41a3589 1 liftmaster belt assy.