LJ8900W Light-Duty Jackshaft Operator Parts
LiftMaster LJ8900W Replacement Parts — Light-Duty Jackshaft Operator
Genuine replacement parts for the LiftMaster LJ8900W light-duty jackshaft commercial door operator. Each section below has its own diagram and its own numbering starting at 1, so match the section name as well as the reference number.
The cable tension monitor is not optional. The LJ8900W will not close unless the cable tension monitor and the safety sensors are both connected and working. If the door refuses to close and the sensors check out, the monitor at ref 3 in the installation section is the next thing to test.
Door Operator Parts
| Ref | Part # | Description |
|---|---|---|
| 1 | 050DCJCWFSD | Logic board, DC Wi-Fi |
| 2 | 041D8861 | Travel module with wire harness. Supplied as the 041B8861, formerly the 41A6408 |
| 3 | 041C0296 | Transformer, 12V |
| 4 | 041D1624-2 | Motor, DC 12V |
| 5 | 041D0190 | Power cord |
| 6 | 041D9042 | Cover |
| — | 041D9044 | Battery cover and logic board cover (not shown) |
Installation Parts
| Ref | Part # | Description |
|---|---|---|
| 1 | 041A4582 | Emergency release rope and handle assembly |
| 2 | 041B4494-1 | 2-conductor bell wire, white and white/red |
| 3 | 041A6104 | Cable tension monitor |
| 4 | 041-0136 | Safety reversing sensor kit, sending and receiving eyes. Replaces the 041A5034 shown on the diagram |
| 5 | 041C0902 | Mounting bracket |
| 6 | 041-0155-000 | Safety reversing sensor brackets, pair. Replaces the 41A5266-1 shown on the diagram |
| 7 | 041D8615 | Collar — currently unavailable. Stocked as the 41A6388 split coupling |
Superseded Part Numbers
The manual prints the original numbers. These parts are now supplied under new numbers — order the current part.
| Ref | Number in manual | Order this instead |
|---|---|---|
| Install 4 | 041A5034 | 041-0136 safety sensor kit |
| Install 6 | 41A5266-1 | 041-0155-000 sensor brackets |
| Opener 2 | 41A6408 | 041B8861 travel module with harness |
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