LiftMaster 8355 Belt Drive Parts
LiftMaster 8355 Replacement Parts
The 8355 is a belt drive opener running the 20 rib 41A5434 belt. Everything for it is on this page: the motor unit, the belt and rail, the safety sensors, the door hardware and the remote. The reference numbers below match the key numbers on the diagram — plain numbers for the motor unit, R numbers for rail parts and i numbers for installation parts.
Ordering a belt? The belt is sized to your door height, not your rail. The 8355 uses the 20 rib 41A5434 belt in 7, 8 or 10 ft. See the rail section below, or use the full LiftMaster belt selector if you are not sure which you need.
1. Motor Unit
First part of number below corresponds to key number above:
| Key | Part # | Description |
|---|---|---|
| 01 | 041A4371 | Belt cap retainer |
| 02 | 041A4885-5 | Gear and sprocket assembly |
| 03 | 041A2817 | Gear kit |
| 04 | 041B4245-1 | Line cord, 6 ft |
| 04 | 041C0279 | Light socket |
| 06 | 041B4494-1 | 2 conductor bell wire, 26 ft |
| 08 | K030B0532-1 | Capacitor |
| 09 | K012A0373 | Capacitor bracket |
| 11 | 041A7442 | Motor |
| 12 | 041D7742-7 | Travel module |
| — | 045ACTMC | Logic board |
| — | 041A7790 | Dual wire harness kit |
| — | 041A7756 | Front end panel |
| — | 41D216 | End panel with all labels and light socket |
| — | 041A7619-5 | Cover |
| — | 041A7562 | Light lens |
The 045ACTMC logic board and the 041D7742-7 travel module are the two most commonly replaced electrical parts on this opener. If the door reverses at the wrong point or will not learn its travel, the travel module is usually the culprit rather than the board.
2. Belt and Rail
First part of number below corresponds to key number above:
| Key | Part # | Description |
|---|---|---|
| R-01 | 41A5434-11 | Belt — 7 ft door |
| R-01 | 41A5434-13 | Belt — 8 ft door |
| R-01 | 41A5434-14 | Belt — 10 ft door |
| R-02 | 041B5424 | Belt pulley bracket |
| R-03 | 004A1008 | Master link kit |
| R-05 | 041B3869-3A | Trolley assembly |
| R-06 | 041B4103 | Tensioner assembly |
A belt rarely fails on its own — check the pulley bracket, trolley and tensioner while the rail is apart. A seized pulley or worn trolley will chew through a new belt in a matter of months. Lower cost aftermarket belts are available: 7 ft, 8 ft, 10 ft.
3. Safety Sensors and Brackets
| Key | Part # | Description |
|---|---|---|
| i-07 | 041-0136 | Safety sensor eye kit — sending and receiving eyes, matched pair |
| — | 041-0365-000 | Sensor eyes and brackets, 1997 to current — the complete set |
| — | 041-0155-000 | Safety sensor brackets, 2021 to present |
| — | 041A5281-1 | Sensor extension brackets |
| — | 041B0873 | Sunblocker bracket — stops sunlight false-tripping the eye |
If you need eyes and brackets, the 041-0365-000 is the complete set. If your brackets are sound, the 041-0136 eye kit alone is all you need. The i-06 sensor bracket (041A5266-1) is no longer available — the 041-0155-000 above replaces it, and the older 41A5034 kit is replaced by the 041-0136.
4. Door Hardware and Installation Parts
First part of number below corresponds to key number above:
| Key | Part # | Description |
|---|---|---|
| i-01 | 041B0035B | Curved door arm |
| i-02 | 041A5047-1 | Door bracket with clevis pin and fastener |
| i-03 | 041A2828 | Emergency release rope and handle |
| i-05 | K029B0137 | Remote control visor clip |
| i-08 | 4178B0034B | Straight door arm |
| i-10 | 10A20 | 3V 2032 lithium battery — remote |
| i- | 041A4353-1 | Header bracket, black — belt drive units |
5. Remotes and Wall Controls
The 8355 is a Security+ 2.0 opener. The 893MAX is the universal remote replacement, and the 889LM MyQ panel is the current wall control.
| Key | Part # | Description |
|---|---|---|
| — | 893MAX | 3 button visor remote — universal replacement |
| — | 889LM | MyQ control panel |
| — | 041A4202-6B | Wall control panel, two wire |
| — | 041A3504 | Antenna extender kit |
| — | L6950 | Multi purpose spray lube, green |
The 893MAX 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. The 98LM, 398LM and 888LM control panels are discontinued — the 889LM replaces them. Browse all LiftMaster remote controls.
More LiftMaster Parts
Belt drive rail and belt parts · All LiftMaster opener parts · LiftMaster remote controls