Chamberlain CG40D, PD100, PD200, PD600 Parts
Chamberlain CG40D, PD100, PD200 and PD600 Replacement Parts
One parts list covers these chain drive openers. If your model is any of the following, this is the right page.
- CG40D
- CG42D
- PD100
- PD200
- PD600
Logic boards for this generation are discontinued. All three versions — 041A5021-1M-315, 041A5021-i and 041A5021-1i — are no longer manufactured and there is no replacement. If several remotes have stopped working at once, or the opener is completely dead with power at the terminal block, that is usually the board. Call (866) 965-5599 before spending anything else — we will tell you honestly whether the repair is still worth doing.
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 | 041A4208-2 | Chain spreader with screws |
| 01A | 31D380 | Sprocket cover — single sprocket units |
| 02 | 041C4220A | Gear and sprocket assembly — also listed as 41A2827 |
| 02 | 041A3261-1 | Dual gear kit |
| 03 | 041A2817 | Gear kit |
| 04 | 041B4245-1 | Line cord, 6 ft |
| 05 | 041D0181 | End panel with all labels |
| 07 | 041C0279 | Light socket |
| 08 | K108D0034 | Light lens — two light operators, sold individually |
| 08A | K108D0036-2 | Light lens — one light operators, CG40D and CG42D |
| 09 | K030B0532-1 | Capacitor — current replacement |
| 10 | K012A0373 | Capacitor bracket |
| 12 | 041D3058 | Universal replacement motor and bracket assembly, 1/2 HP |
| 14 | 041A2818 | Limit drive gear |
| 15 | 041D3452 | Limit switch assembly |
| 16 | 041C4398A | RPM sensor assembly |
| 17 | 041C4246 | Wire harness, 1993 to current |
| 18 | 041A2817 | Gear kit including bearings |
| 20 | 041A5021-1M-315 | Receiver logic board — no longer available |
| 20 | 041A5021-i | Receiver logic board — no longer available |
| 20 | 041A5021-1i | Receiver logic board — no longer available |
| 22 | 41A3673 | End panel — two light operators |
| — | 041A5484 | End panel |
| — | 041A5615 | Chain spreader |
| — | 041A2770-17 | Installation hardware kit |
The capacitor is the K030B0532-1; the older 30B366 1/4 HP capacitor is discontinued and this replaces it. 041A2817 is called out twice, at 03 and 18 — the same gear kit either way.
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 |
| — | 041A5807 | Chain and cable — 7 ft door |
| — | K144C0056 | Cable idler pulley |
| — | 183A163 | Wear pads |
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; replace it if links are stiff, the cable is frayed, or the chain has jumped the sprocket. See all Chamberlain chain drive 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 — both brands are built by the same manufacturer. 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 |
| — | 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 modern panels will not work. 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