Chamberlain B970 Belt Drive Parts
Chamberlain B970 Replacement Parts
The B970 is a Wi-Fi enabled DC 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 the B970 that is usually the travel module rather than the logic board — a cheaper part and a quicker job. The motor at ref 07 comes with a travel module, so you do not need both.
1. Garage Door Opener Repair Parts
First part of number below corresponds to diagram number above:
| Ref | Part Number | Description |
|---|---|---|
| 02 | 041D7639-1 | End panel with light socket |
| 04 | 041C0279 | Light socket |
| 05 | 041D0277-1 | Transformer |
| 06 | 041D8810 | Cover |
| 07 | 041D8006-1 | Motor with travel module — now 041-0236-000 |
| 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 |
| 11 | 041B4245-1 | Line cord, 6 ft |
| 12 | 041A3150 | Terminal block with screws |
| — | 041D8255 | Wire harness — not shown on diagram |
Replacing the logic board? The B970'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. The motor is likewise superseded — the 041D8006-1 now ships as the 041-0236-000.
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 |
| 02 | K144C0054M | 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 |
| 07 | 041A6689 | D-shape threaded shaft |
| 08 | 041B4103 | Belt tensioner assembly |
| — | 041A7276 | Wear pads — not shown on diagram |
| — | 041A7920-2 | Hardware bag — not shown on diagram |
A belt rarely fails on its own. Check the pulley, trolley, tensioner 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
| Ref | Part Number | Description |
|---|---|---|
| 01 | 041B0035B | Curved door arm section |
| 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 section |
| 10 | 10A20 | 3V CR2032 remote battery |
| — | K012B0776 | Hanging brackets |
| — | 893MAX | 3 button remote control — universal replacement |
The B970 is a MyQ opener, so it also takes the current Chamberlain smart control panels and accessories. Browse all Chamberlain remote controls.
More Chamberlain Parts
All Chamberlain opener parts · Belt drive belts and rail parts · Chamberlain remote controls