LiftMaster 41C4470 Gear and Sprocket Kit for CSO/ATS Openers

LiftMaster 41C4470 Gear and Sprocket Kit

The LiftMaster 41C4470 is a gear and sprocket replacement kit for select Chamberlain CSO series and LiftMaster ATS chain drive garage door openers. It is used to repair worn or failed internal chain drive gears.

This kit helps restore proper drive operation when the opener motor runs but the chain does not move correctly, or when internal gear wear causes grinding, slipping, or visible gear debris.

Compatible With

The 41C4470 is a model-specific gear kit for select CSO and ATS applications. Compatibility should be verified by model and parts diagram.

Common Compatible Models and Families

• Chamberlain CSO series chain drive openers
• LiftMaster ATS211 chain drive opener
• LiftMaster ATS211R chain drive opener
• Select related CSO/ATS chain drive opener applications

Important Compatibility Notes

• Not a universal LiftMaster gear kit
• Do not confuse with 41C4220A, 41A5585, or 41A5658
• Match exact opener series and diagram
• Check chain drive layout before ordering

Features & Specifications

Also Known As / Related Part Numbers

This part may be searched under related LiftMaster, Chamberlain, or older catalog number formats. Related numbers should be verified against the opener parts diagram before treating them as exact replacements.

• 41C4470
• 041C4470
• LiftMaster 41C4470
• Chamberlain 41C4470
• CSO gear and sprocket kit
• ATS211 gear and sprocket kit
• ATS211R gear and sprocket kit

Technician Note

Because CSO and ATS gear kits can be confused with other LiftMaster gear assemblies, match the exact opener model and parts diagram before ordering.

Before Ordering, Confirm

• The opener is a CSO, ATS211, ATS211R, or confirmed related model
• The original kit number matches 41C4470 or 041C4470
• The chain and rail are not binding
• The door is balanced and operating smoothly
• The sprocket and gear layout match the original assembly

Professional Advisory

Disconnect power before servicing internal drive parts. If the opener is used in a higher-cycle or heavier-door application, have the door and operator inspected before replacing only the gear kit.

Important Ordering Warnings

• Not interchangeable with all LiftMaster chain drive gear kits
• A heavy or binding door can cause repeat gear failure
• Model number matters more than appearance
• Do not install if the chain drive system is damaged
• Verify the CSO/ATS parts diagram

Questions & Answers

What opener series commonly uses 41C4470?

The 41C4470 is commonly associated with Chamberlain CSO series and LiftMaster ATS211 or ATS211R chain drive opener applications.

Is 41C4470 a residential gear kit?

It is used on select CSO and ATS chain drive opener applications and should be matched by model rather than treated as a universal residential gear kit.

What comes in the 41C4470 kit?

It is commonly listed as a complete gear and sprocket kit with helical gear, top hat assembly, worm gear, wear bushings, grease, and related hardware.

Can this replace 41C4220A?

No. 41C4470 and 41C4220A are different gear kit families. Use the parts diagram for the exact opener before substituting.

What should be inspected with a failed CSO or ATS gear kit?

Inspect the chain, rail, trolley, door balance, sprocket shaft area, and travel conditions to make sure the new kit is not overloaded.