LiftMaster 4A1008 #48 Chain Master Link Kit
The LiftMaster 4A1008 is a #48 chain master link replacement kit for compatible residential chain drive garage door opener rail assemblies. It is used to reconnect or service compatible chain sections during repair.
A master link joins the ends or service sections of a garage door opener chain. When the link is worn, damaged, missing, or incorrectly installed, the chain may separate or travel unevenly.
Compatible With
This part is commonly associated with the applications below. Compatibility should be based on the original part number, opener model, rail or receiver style, and the replacement parts diagram for the exact unit.
- Various LiftMaster residential chain drive garage door openers using #48 chain
- Various Chamberlain residential chain drive garage door openers using #48 chain
- Select Sears Craftsman chain drive openers made by Chamberlain Group using compatible #48 chain
- Compatible rail assemblies that call for 004A1008 or 4A1008 in the parts diagram
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster / Chamberlain Group |
| Product Type | Chain master link kit |
| Part Number | 4A1008 |
| Current Part Format | 004A1008 |
| Chain Size | #48 chain |
| Application | Residential chain drive opener rail service |
| Includes | Two #48 chain master links |
| Compatible Operator Type | Select chain drive garage door openers |
| Notes | Match chain size and parts diagram before use. |
Also Known As / Related Part Numbers
- 4A1008
- 004A1008
- 1A995
- 062208
- LiftMaster master link kit
- #48 chain master link
- Garage opener chain link kit
Technician Note
Match this replacement part to the original part number and the equipment parts diagram before installation. Similar LiftMaster and Chamberlain service parts may look close but fit different rail styles, drive systems, generations, or wiring layouts.
Before Ordering, Confirm
- Original part number or related service number matches the listing
- Opener model and parts diagram call for this part family
- Drive type, rail style, wiring type, or remote housing style matches the original application
- No related mechanical, electrical, or door-balance issue caused the original part to fail
Professional Advisory
For electrical harnesses or opener components near moving hardware, disconnect power before service and test the operator safely after installation. If wiring is burned, the door is binding, or safety devices are missing or damaged, have the system inspected by a qualified garage door technician.
Important Ordering Warnings
- Use only with compatible #48 chain assemblies.
- Do not use this kit to compensate for a stretched, damaged, or badly worn chain.
- Inspect the sprocket, trolley, rail, and door balance if the original link failed.
Questions & Answers
What chain size is the 4A1008 used with?
The 4A1008 is used with compatible #48 chain assemblies on select LiftMaster and Chamberlain residential chain drive garage door openers.
How many master links are included?
The 4A1008 / 004A1008 kit is commonly listed as including two #48 chain master links.
Can this kit fix a broken opener chain?
It can reconnect compatible chain sections when the chain and rail are otherwise serviceable, but a stretched, damaged, or severely worn chain may need more than a master link.
Will this work on belt drive or screw drive openers?
No. This kit is for compatible chain drive rail assemblies and should not be used on belt drive or screw drive openers.
What should be checked if the master link failed?
Check the chain tension, sprocket, trolley, rail alignment, and garage door balance. A binding door or worn drive parts can cause repeat chain problems.
