Chamberlain HD750WF Belt Drive Parts
Chamberlain HD750WF Replacement Parts
The HD750WF is a Wi-Fi enabled belt drive opener on a square rail. Its belt, rail, trolley and U bracket are square rail specific and will not interchange with the T-rail parts used on most belt drives. Everything for it is on this page.
Door reverses at the wrong point, or will not learn its travel? On this opener that is usually the travel module rather than the logic board — a cheaper part and a quicker job.
1. Garage Door Opener Repair Parts
First part of number below corresponds to diagram number above:
| Ref | Part Number | Description |
|---|---|---|
| 02 | 041D0207 | End panel with light socket |
| 04 | 041C0279 | Light socket |
| 05 | 041D0277-2 | Transformer |
| 06 | 041D0614-24 | Cover |
| 08 | 041D8214 | End panel for receiver logic board, with light socket |
| 09 | 050DCTWF | Receiver logic board, Wi-Fi — now 050DCTBFMC |
| 10 | 041D8071-4 | Travel module |
Replacing the logic board? The HD750WF's board is the 050DCTWF, now supplied as the 050DCTBFMC. It carries the Wi-Fi hardware, so a non-Wi-Fi board will not pair with the app. Read the number printed on the board you are removing before ordering, and call (866) 965-5599 if it is neither of those. We do not currently stock the motor for this model — call us if that is what has failed and we will tell you where you stand.
2. Belt and Square Rail
First part of number below corresponds to diagram number above:
| Ref | Part Number | Description |
|---|---|---|
| 01 | 041A5250 | Full belt assembly — 7 ft door |
| 01 | 041A5250-1 | Full belt assembly — 8 ft door |
| 01 | 041A5250-2 | Full belt assembly — 10 ft door |
| 02 | K144C0054M | Belt idler pulley |
| 03 | 004A1008 | Master link kit |
| 04 | 041A5665 | Square rail assembly |
| 05 | 041C5141-2 | Complete trolley assembly, square rail |
| 06 | 041D0598-1 | U bracket, square rail |
| — | 183A163 | Wear pads — not shown on diagram |
The belt is sized to your door height, not your rail — measure the door opening. A belt rarely fails on its own: check the idler pulley, trolley and wear pads while the rail is apart — worn pads let the trolley rock in the rail and will chew through a new belt in months.
3. Safety Sensors and Brackets
| Ref | Part Number | Description |
|---|---|---|
| 07 | 041-0136 | Safety sensor eye kit — replaces 41A5034 |
| 09 | 041B4494-1 | White and red/white sensor wire |
| 06 | 041A5266-3 | Safety sensor brackets — no longer available |
| — | 041-0155-000 | Safety sensor brackets — replaces 041A5266-3 |
| — | 041-0365-000 | Sensor eyes and brackets — the complete set |
| — | 041B0873 | Sunblocker bracket — stops sunlight false-tripping the eye |
The current 041-0136 eye kit replaces the older 41A5034 and fits Chamberlain and LiftMaster openers alike. If your brackets are bent or missing too, the 041-0365-000 includes eyes and brackets together.
4. Installation Parts and Accessories
First part of number below corresponds to diagram number above:
| Ref | Part Number | Description |
|---|---|---|
| 01 | 041B0035B | Curved door arm |
| 02 | 041A5047-1 | Door bracket with clevis pin and fastener |
| 03 | 041A2828 | Emergency release rope and handle |
| 04 | 041A5047-2 | Header bracket with clevis pin and fastener |
| 05 | 29B137 | Remote control visor clip |
| 08 | 4178B0034B | Straight door arm |
| 10 | 10A20 | 3V CR2032 remote battery |
| 11 | 12B776 | Hanging bracket |
| — | 041A7327-1 | Motion detecting control panel |
| — | 893MAX | 3 button remote control — universal replacement |
The HD750WF shipped with the 041A7327-1 motion detecting control panel — the one that turns the opener light on when you walk into the garage. As a Wi-Fi model it also takes the current Chamberlain smart control panels. Browse all Chamberlain remote controls.
More Chamberlain Parts
All Chamberlain opener parts · Belt drive belts and rail parts · Chamberlain remote controls