Liftmaster 041D3484, CHAIN KIT, 7'
LiftMaster 041D3484 is a one-piece 7 foot chain assembly kit for select LiftMaster and Chamberlain chain drive garage door openers that use a T-rail. It is the common service chain length for many standard 7 foot residential garage door installations.
The chain assembly transfers power from the opener motor and sprocket to the trolley. When the chain is stretched, kinked, rusted, noisy, or damaged, the opener may jerk, slap the rail, lose smooth travel, or fail to operate reliably. Replacing the chain can restore proper movement when the rail, sprocket, trolley, and door are still in serviceable condition.
Fitment depends on rail style and door height. This is not the correct kit for 8 foot or 10 foot high-door rail setups, even if the opener head model is similar.
Compatible With
Use this kit with select chain drive openers using the correct 7 foot T-rail assembly.
- LiftMaster 8360WLB, 8360W, 8160WB, 81602, 81600, 8580WLB, 87802, 81650, 81640, 84602, 8365W-267, 85870, 8365, and 8164W references when the 7 foot T-rail chain kit is listed
- Various Chamberlain chain drive garage door openers using a T-rail and 7 foot door setup
- Select AC and DC chain drive openers where the parts diagram calls for 041D3484
- Not for 8 foot or 10 foot T-rail chain assemblies
- Not for belt drive, screw drive, jackshaft/RJO, or gate operator systems
Also Known As / Related Part Numbers
- 041D3484
- 41D3484
- 41A3484
- 41C2762
- 7 foot chain kit
- 7 ft chain assembly
Features & Specifications
| Manufacturer | LiftMaster / Chamberlain Group |
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| Product Type | Chain assembly kit |
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| Part Number | 041D3484 |
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| Application | Garage door opener rail drive replacement |
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| Compatible Operator Type | Select chain drive openers with T-rail |
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| Door Height | 7 foot garage door applications |
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| Rail Type | T-rail, diagram-confirmed |
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| Notes | Related numbers include 41D3484, 41A3484, and 41C2762 |
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Technician Note
If the old chain is loose, inspect the trolley and sprocket before simply tightening or replacing the chain. Excessive slack often points to wear elsewhere in the drive system.
Before Ordering Checklist
- Confirm the garage door height is 7 feet.
- Confirm the opener uses a compatible T-rail chain drive setup.
- Match 041D3484, 41D3484, 41A3484, or 41C2762 in the diagram when possible.
- Check the sprocket, rail, trolley, and idler pulley for wear.
- Do not use on 8 foot or 10 foot rail extensions.
Important Ordering Warnings
- Using the wrong chain length can prevent proper tensioning and travel.
- A new chain will not correct a worn sprocket, damaged rail, or unbalanced door.
Professional Advisory
Garage door opener repairs should be completed with the power disconnected and the door properly balanced. For internal motor, harness, or high-voltage diagnosis, use a qualified garage door technician. Never bypass safety sensors, travel controls, or door balance problems to force an opener to run.
Product Questions & Answers
What door height is 041D3484 made for?
It is the 7 foot chain kit for compatible LiftMaster and Chamberlain T-rail chain drive openers.
Is 041D3484 the same as 41A3484 or 41C2762?
Those are related numbers commonly associated with this 7 foot chain kit. Verify the opener diagram before ordering.
Can this chain be shortened or lengthened for another door height?
No. Use the correct factory chain kit for the installed rail and door height.
Does this fit belt drive openers?
No. This is a chain assembly kit for select chain drive openers with a T-rail.
Why is my chain loose again after adjustment?
The chain may be stretched, the sprocket may be worn, or the door may be heavy or binding. Check the complete drive system.
