These are screw drive openers. Everything for them is on this page: the motor unit, the screw drive rail, the safety sensors, the door hardware, the wall control and the remote. Each section has its own diagram, and the reference numbers are specific to the diagram directly above them.
Opener runs but the door barely moves, or the rail groans? On a screw drive that is usually the rail rather than the head — old grease hardens and the trolley starts fighting the screw. Strip the old grease off completely and re-grease with the 83A11-2 rail grease before you replace anything. See section 2.

First part of number below corresponds to diagram number above:
| Ref | Part # | Description | Fits |
|---|---|---|---|
| 01 | 041A3150 | Terminal block with screws | All |
| 02 | 041B4245-1 | Line cord, 6 ft | All |
| 03 | K030B0532-1 | Capacitor | All |
| 04 | K012A0373 | Capacitor bracket | All |
| 05 | 041A3150 | Terminal block with screws — second callout | All |
| 07 | 12D630 | Bracket for light socket and limit switch | All |
| 08B | 144B0042 | 28 tooth pulley | All |
| 08D | 158A69 | Retainer ring | All |
| 08E | 041C0556 | Isolator bracket spacers | All |
| 08G | K081B0170-1 | Shaft limit worm | All |
| 11A | 041C5416 | High voltage wire harness | All |
| 12 | 041AS050-1 | Receiver logic board assembly — current replacement | All |
| 13 | 41A5490-5 | Cover | 3110 |
| 15 | K175C0147 | Light socket | All |
| 16 | K108D0078 | Light lens | All |
| 17 | 41A5387 | Chassis with rail bracket | All |
| — | 041B0139 | Isolator spacer kit | All |
| — | 041A2770-17 | Installation hardware kit | All |
The terminal block is called out twice, at 01 and 05 — same part either way. The cover at ref 13 differs by model: the 41A5490-5 above fits the 3110; the 41C1471 for the 2110 is no longer available.
Replacing the logic board? The current board is the 041AS050-1 at ref 12. If the number on your old board reads 041A5389-1E, the 041AS050-1 is its replacement. Parts we cannot supply for these models: the limit switch assembly (041D4671), the RPM sensor assembly (41C4672), the motor pulley (144B0041M), the low voltage wire harness (41C5417), and the two motor brackets (41A5394 and 12B654). Call (866) 965-5599 if you need one of those and we will tell you where that leaves you.

First part of number below corresponds to diagram number above:
| Ref | Part # | Description |
|---|---|---|
| 01 | 041A4795 | Hardware bag |
| 04 | K081C0168 | Rack |
| 04 | K081C0275 | Rack — second version |
| 06 | 041A4836 | Drive sprocket kit |
| 07 | K025C0020 | Coupler |
| 16 | 041B0035B | Curved door arm |
| 17 | 4178B0034B | Straight door arm section |
| — | 041A4837-1 | Worm gear and retainer kit |
| — | 83A11-2 | Rail grease |
| — | 041A8094 | Door arm kit — curved and straight sections together |
There are two racks at ref 04 — K081C0168 and K081C0275. Check the number on the one you are removing. The screw drive trolley (041C4677) and the 3 piece SSR rail kit (041A6263) are no longer available. See all screw drive rail parts.

First part of number below corresponds to diagram number above:
| Ref | Part # | Description |
|---|---|---|
| S1–S2 | 041-0136 | Safety sensor eye kit — sending and receiving eyes, supplied as a matched pair |
| S3–S4 | 041A5281-1 | Sensor extension brackets |
| — | 041-0155-000 | Safety sensor brackets, 2021 to present |
| — | 041B0873 | Sunblocker bracket — stops sunlight false-tripping the eye |
| — | Sensor Guards | Protective guards, sensors not included |
| — | 041B4494-1 | 2 conductor bell wire, 26 ft |
The current eyes and brackets replace every earlier version, so there is no need to match your old part number — order the current part.
| Old Part # | Order Instead | Notes |
|---|---|---|
| 41A5034 | 041-0136 | Eye kit used 1997 onward, now superseded |
| 12B484 | 041A5281-1 | Square holed mounting bracket, discontinued |
| 12B485 | 041A5281-1 | Slotted mounting bracket, discontinued |
| 041A5266-1 | 041-0155-000 | Sensor mounting bracket, no longer available |

First part of number below corresponds to diagram number above:
| Ref | Part # | Description |
|---|---|---|
| 01–02 | 893MAX | 3 button visor remote — universal replacement for all older remotes |
| 03 | 10A20 | 3V coin battery for the remote |
| 05 | 10A14 | 12V battery — 61LM series remotes |
| 06 | 041B4494-1 | 2 conductor bell wire, 26 ft |
| 07 | 041A4353 | Header bracket, 1993 to current |
| 08 | 041A5047 | Door bracket |
| 09 | 041A2828 | Manual release rope and handle assembly |
| 10 | 29C128 | Remote visor clip |
| 12 | 041A4166 | Lighted pushbutton, two wire |
| 13–15 | 041C0494-2 | Multi-function door control panel — the replacement on pre-1998 openers |
| 13–15 | 889LM | MyQ control panel — the replacement on 1998 and newer openers |
| — | 041A4202-6B | Wall control panel, two wire |
| — | 041A3504 | Antenna extender kit |
| — | 041A3504-1 | Antenna extender kit with adapter |
| — | L6950 | Multi purpose spray lube, green |
| — | L6960 | Multi purpose spray lube, blue |
The original remotes for these openers are discontinued. The 893MAX is the universal replacement and works with all the older LiftMaster, Chamberlain and Craftsman openers. It covers 371LM, 971LM, 973LM and 893LM, and is the listed substitute for 81LM, 83LM, 63LM, 753CB, 850CB, 853CB, 953CB, 953EV and Craftsman 53680, 53859 and 53879. Browse all LiftMaster remote controls.
| Old Part # | Order Instead | Notes |
|---|---|---|
| 041C0494-1 | 041C0494-2 | Multi-function door control panel, superseded |
| 41C494 | 041C0494-2 | Soft glow wall control panel, no longer available |
| 98LM | 889LM | Motion detecting control panel, discontinued, 1998 and newer |
| 398LM | 889LM | Control panel, discontinued, 1998 and newer |
| 888LM | 889LM | Control panel, discontinued, 1998 and newer |
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