Chamberlain B353 Belt Drive Parts
Chamberlain B353 Replacement Parts
The B353 is an AC belt drive opener on a square rail. Its belt, rail, trolley and U bracket are square rail specific and will not interchange with T-rail parts. This parts list covers both variants:
- B353
- B353C
Motor runs but the door does not move? That is the gear and sprocket kit at ref 2 — the nylon gear strips. Note it is the 041A4885-4 on this model, not the -5 used on older Chamberlain belt drives.
1. Garage Door Opener Repair Parts
First part of number below corresponds to diagram number above:
| Key | Part Number | Description |
|---|---|---|
| 1 | 041A4371 | Belt cap retainer kit |
| 2 | 041A4885-4 | Gear and sprocket kit, AC belt |
| 3 | 041A7618 | End panel |
| 4 | 041C0279 | Light socket |
| 5 | K108D0079M | Light lens |
| 6 | K030B0532-1 | Capacitor |
| 7 | K012A0373 | Capacitor bracket |
| 8 | 041D7742-7 | Travel module |
| 9 | 041-0024-000 | Cover — no longer available |
| 10 | 045ACTMC | Receiver logic board, Security+ 2.0 |
| 11 | 041-0025-000 | End panel |
| 12 | 041D7440 | Motor with travel module, 1/2 HP |
| 13 | 041B4245-1 | AC power cord, 6 ft |
| 14 | 041A3150 | Terminal block |
| — | 041A7946 | Wire harness — not shown on diagram |
The cover is no longer available. The key 9 cover (041-0024-000) is discontinued with no replacement. Every other part on this diagram is available. Read the number printed on the logic board you are removing before ordering — if it is not the 045ACTMC, call (866) 965-5599 with it and we will confirm the right replacement.
The motor at key 12 comes with a travel module, so you do not need both. If the door reverses at the wrong point or will not learn its travel, that is usually the travel module alone — a cheaper part and a quicker job than the board.
2. Rail Assembly Parts
First part of number below corresponds to diagram number above:
| Key | Part Number | Description |
|---|---|---|
| 1 | 041A5250 | Belt kit — 7 ft door |
| 1 | 041A5250-1 | Belt kit — 8 ft door |
| 1 | 041A5250-2 | Belt kit — 10 ft door |
| 2 | K144C0054M | Belt idler pulley |
| 3 | 004A1008 | Chain, #48, master link |
| 4 | 041A5665 | Rail kit, 7 ft |
| 5 | 041C5141-2 | Square rail trolley kit |
| 6 | 041D0598-1 | U bracket adapter |
| 7 | 041A6689 | Threaded shaft, D shape |
| 8 | 041B4103 | Belt tensioner kit |
| — | 041A7276 | Trolley wear pads — not shown on diagram |
| — | K083A0011-1 | Lithium rail grease — 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, tensioner and wear pads while the rail is apart. Re-grease with the lithium grease above; 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 |
| 3 | 041A2828 | Emergency manual release rope |
| 4 | 041A5047-3 | Header bracket — square rail |
| 5 | K029B0137 | Remote control visor clip |
| 6 | 041-0155-000 | Safety sensor bracket kit |
| 7 | 041-0136 | Safety sensor kit |
| 8 | 4178B0034B | Straight door arm |
| 9 | 041B4494-1 | White and red bell wire |
| 10 | K010A0020 | 3V CR2032 lithium battery |
| 11 | K012B0776 | Hanging bracket kit |
| — | 041A7920-2 | Hardware kit — not shown on diagram |
| — | 041-0365-000 | Sensor eyes and brackets — the complete set |
| — | 893MAX | Universal replacement remote |
The B353 takes the 041A5047-3 square rail header bracket — the standard header brackets will not fit. 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.
More Chamberlain Parts
All Chamberlain opener parts · Belt drive belts and rail parts · Chamberlain remote controls