Chamberlain 7320, 7420, 7520D & HD200D Parts
Chamberlain 7320, 7420, 7520D, 48930D and HD200D Replacement Parts
One parts list covers these chain drive openers. Every part on this page is currently available.
- 7320
- 7420
- 7520D
- 48930D
- HD200D
Motor runs but the door does not move? That is almost always the gear and sprocket assembly at ref 02 — the nylon gear strips. It is part 041C4220A, also listed as 41A2827, and we stock it in both factory and aftermarket versions. See section 2.
1. Garage Door Opener Repair Parts
First part of number below corresponds to diagram number above:
| Ref | Part Number | Description |
|---|---|---|
| 01 | K031D0380M | Sprocket cover |
| 02 | 041C4220A | Gear and sprocket assembly — also listed as 41A2827 |
| 03 | 041A2817 | Gear kit |
| 04 | 041B4245-1 | Line cord, 6 ft |
| 06 | 041C0279 | Light socket |
| 09 | K012A0373 | Capacitor bracket |
| 13 | 041A2818 | Limit switch drive and retainer |
| 14 | 041D3452 | Limit switch assembly |
| — | K030B0532-1 | Capacitor |
| — | 041A2770-17 | Installation hardware kit |
If the opener hums but the door does not move, check the capacitor before the gear — a failed capacitor gives the same symptom and costs a fraction as much. If the motor turns freely and the sprocket does not, it is the gear.
2. Gear and Sprocket — Factory or Aftermarket
The nylon gear on the 041C4220A is the most common failure on these openers, and the part fits most Chamberlain and LiftMaster chain drives. You may see it called 41A2827 — it is the same assembly. We stock both the genuine part and a lower cost aftermarket version built to the same dimensions.
| Part # | Description | Factory (OEM) | Aftermarket |
|---|---|---|---|
| 041C4220A | Gear and sprocket assembly, aka 41A2827 | Factory assembly | Aftermarket assembly |
Fit the new gear with the opener disconnected from the door, and grease the worm before reassembly — running it dry is what strips the next one. The 041A2817 gear kit is the alternative if only the gear itself has failed.
3. Chain and Rail
| Ref | Part Number | Description |
|---|---|---|
| — | 004A1008 | Master link kit |
| — | 041A3473 | Chain and cable — 7 ft door, T rail |
| — | 041C2760 | Chain and cable — 8 ft door, T rail |
| — | 041A3489 | Trolley assembly — T rail |
| — | 83A11-2 | Rail grease |
The chain is sized to your door height — measure the door opening, not the rail. A slack chain can usually be re-tensioned rather than replaced. See all Chamberlain chain drive chains and rail parts.
4. Safety Sensors and Brackets
| Ref | Part Number | Description |
|---|---|---|
| — | 041-0136 | Safety sensor eye kit — replaces 41A5034 |
| — | 041-0155-000 | Safety sensor brackets, 2021 to present |
| — | 041-0365-000 | Sensor eyes and brackets — the complete set |
| — | 041B0873 | Sunblocker bracket — stops sunlight false-tripping the eye |
| — | 041B4494-1 | 2 conductor bell wire, 26 ft |
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.
5. Door Hardware and Remotes
| Ref | Part Number | Description |
|---|---|---|
| — | 041B0035B | Curved door arm |
| — | 4178B0034B | Straight door arm section |
| — | 041A8094 | Door arm kit — curved and straight sections together |
| — | 041A5047-1 | Door bracket with clevis pin and fastener |
| — | 041A2828 | Emergency release rope and handle |
| — | 893MAX | 3 button remote control — universal replacement |
| — | 041C0494-2 | Multi-function door control panel |
These openers predate Security+ 2.0, so use the 041C0494-2 wall control rather than a MyQ panel. The 893MAX replaces every older Chamberlain, LiftMaster and Craftsman remote. Browse all Chamberlain remote controls.
More Chamberlain Parts
All Chamberlain opener parts · Chain and master links · Chamberlain remote controls