Chamberlain B4603T Belt Drive Parts
Chamberlain B4603T Replacement Parts
The B4603T is a DC belt drive opener on a square rail, without a camera. Its cover and light pod, badge and end panel differ from the camera models — those parts do not interchange. This parts list covers all variants:
- B4603
- B4603T
- B4603TC
- B4603TCH
Non-camera parts — check before ordering. The B4603T takes the 041-0203 cover and light pod, the 041-0206 badge and the 041-0198 end panel, no battery access. The camera models take the 041-0201 or 041-0200 pod and the 041-0205 badge, and the B4613T takes the 041-0199 end panel with battery access. Several similar numbers, none interchangeable. Call (866) 965-5599 if you are unsure which you have.
Door reverses at the wrong point, or will not learn its travel? That is usually the 041D8071-4 travel module rather than the logic board — a cheaper part and a quicker job. The motor at key 5 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:
| Key | Part Number | Description |
|---|---|---|
| 1 | 041C1751 | Sprocket and sprocket cover |
| 2 | 041-0198 | End panel, no battery access |
| 3 | 041-0203 | Cover and light pod |
| 4 | 041-0204 | Control door panel |
| 5 | 041-0236 | Motor with travel module |
| 6 | 041-0197 | Logic board end panel |
| 7 | 050DCTB | Logic board |
| 8 | 041D8071-4 | Travel module |
| 9 | 041D0277-1 | Transformer |
| 10 | 041B4245-1 | Line cord |
| 11 | 041A3150 | Terminal block |
| — | 041-0206 | Badge — not shown on diagram |
| — | 041-0181 | Wire harness — not shown on diagram |
The 041-0181 is the single lens wire harness. The 041-0180 dual lens harness fits the B6713T and B6753T and will not suit this opener.
2. Rail Assembly Parts
First part of number below corresponds to diagram number above:
| Key | Part Number | Description |
|---|---|---|
| 1 | 041A5250 | Belt — 7 ft door |
| 1 | 041A5250-1 | Belt — 8 ft door |
| 1 | 041A5250-2 | Belt — 10 ft door |
| 2 | 144C0054M | Pulley |
| 3 | 004A1008 | Master link |
| 4 | 041A5665 | Rail |
| 5 | 041C5141-2 | Trolley assembly — threaded shaft, clevis pin and ring |
| 6 | 041D0598-1 | "U" bracket |
| 7 | 041A6689 | D-shape threaded shaft |
| 8 | 041B4103 | Spring trolley nut |
| — | 041A7276 | Wear pads — not shown on diagram |
| — | 041A7920-2 | Hardware bag — 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 pulley, trolley and wear pads while the rail is apart, since worn pads let the trolley rock and will chew through a new belt in months. Re-grease with lithium rail grease; do not use general purpose spray lube on a square rail.
3. Installation Parts
First part of number below corresponds to diagram number above:
| Key | Part Number | Description |
|---|---|---|
| 1 | 041B0035B | Curved door arm |
| 2 | 041A5047-1 | Door bracket with clevis pin and fastener |
| 3 | 041A2828 | Emergency release rope and handle |
| 4 | 041A5047-2 | Header bracket with clevis pin and fastener |
| 5 | K029B0137 | Remote control visor clip |
| 6 | 041-0155 | Safety sensor bracket |
| 7 | 041-0136 | Safety sensor kit — receiving and sending sensors with 2 conductor wire |
| 8 | 4178B0034B | Straight door arm |
| 9 | 041B4494-1 | White and red/white wire |
| 10 | K010A0020 | 3V CR2032 lithium battery |
| 11 | 012B0776 | Hanging brackets |
| — | 041-0365-000 | Sensor eyes and brackets — the complete set |
| — | 893MAX | Universal replacement remote |
If your sensor brackets are bent or missing as well as the eyes, the 041-0365-000 includes both and works out cheaper than buying them separately. The 893MAX replaces every older Chamberlain, LiftMaster and Craftsman remote — browse all Chamberlain remote controls.
More Chamberlain Parts
All Chamberlain opener parts · Belt drive belts and rail parts · Safety sensor eyes and brackets · Chamberlain remote controls