Liftmaster 041A5249, CHAIN AND CABLE KIT, 7'
The LiftMaster 041A5249 chain and cable kit is the drive assembly used in select residential chain drive opener rail systems for standard 7 ft high garage doors. It replaces the chain and attached cable that run through the opener rail and connect to the trolley. When this assembly wears out, the opener may run but fail to move the door correctly, the chain may sag excessively, or the trolley movement may become noisy and uneven. Because chain and cable kits are length-specific, the door height and rail configuration are just as important as the opener brand. This 7 ft kit should be used only when the opener manual or parts diagram calls for 041A5249 or 41A5249.
Compatible With
Common Compatible Applications
- Select LiftMaster residential chain drive garage door openers with 7 ft rail systems
- Select Chamberlain residential chain drive garage door openers with 7 ft rail systems
- Select Craftsman chain drive garage door openers built by Chamberlain Group when the parts diagram lists 041A5249 or 41A5249
- Standard 7 ft high residential garage door installations using the correct matching rail
Important Compatibility Notes
- Not for belt drive openers
- Not for screw drive openers
- Not for 8 ft or 10 ft high door rail systems unless the manual specifically calls for this part
- Match the trolley, rail style, and original chain/cable part number before ordering
Features and Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster / Chamberlain Group |
| Product Type | Chain and cable replacement kit |
| Part Number | 041A5249 |
| Door Height Application | 7 ft high residential garage door |
| Application | Residential chain drive opener rail assembly |
| Compatible Operator Type | Select LiftMaster, Chamberlain, and Craftsman chain drive garage door openers |
| Drive Type | Chain drive |
| Notes | Length-specific assembly; verify by parts diagram |
Also Known As / Related Part Numbers
- 041A5249
- 41A5249
- LM-041A5249
- Chain and cable kit 7 ft
- One-piece chain and cable assembly
Technician Note
A chain that keeps loosening after adjustment may indicate worn sprockets, a damaged trolley, or incorrect chain length. Inspect the full rail drive system before replacing only the chain and cable.
Before Ordering Checklist
- Confirm the opener is a chain drive model
- Confirm the garage door height is 7 ft
- Check the original part number in the manual or parts diagram
- Inspect the drive sprocket and trolley for wear
- Do not substitute an 8 ft or 10 ft chain assembly for this kit
Professional Advisory
Disconnect power before servicing the opener rail. If the door is heavy, out of balance, or hard to move by hand, correct the door issue before replacing opener drive parts.
Product Questions and Answers
What door height is 041A5249 made for?
It is made for select chain drive garage door openers installed on a standard 7 ft high garage door.
Is 041A5249 a belt kit?
No. It is a chain and cable kit for chain drive openers, not a belt drive assembly.
Can I use this on an 8 ft garage door?
No, not unless the opener parts diagram specifically calls for 041A5249. Most taller doors require a different length assembly.
What symptoms point to a worn chain and cable kit?
Common symptoms include a stretched chain, broken cable section, uneven trolley movement, excessive rail noise, or a door that will not travel fully after proper adjustment.
Is 41A5249 the same part number?
Yes, 41A5249 is the common no-leading-zero format for 041A5249.
