Genie 33045A.S Chain Guide B Replacement Details
The Genie 33045A.S is a Chain Guide B component for select Genie chain drive garage door opener rail systems. The guide helps maintain proper chain path and reduces unwanted chain movement in the rail area.
This part is usually ordered when the original chain guide is cracked, missing, worn, or damaged during rail service. Because Genie chain rails may use more than one guide, washer, spacer, or chain stripper, the letter position and part number should be matched before ordering.
Compatible With
- Select Genie GCG350, GCG350L, PCG400, PCG450, PCG600, and PCG650 chain drive opener applications when the parts diagram shows 33045A.S
- Select Genie 2020CT and H2000C / Aladdin ChainLift related rail parts categories where Chain Guide B is listed
- Use only on rail assemblies that call for Chain Guide B, not Chain Guide A, Chain Stripper C, or unrelated rail spacers
- Not a replacement for the drive chain, sprocket, carriage, rail coupler, or powerhead hardware
Features & Specifications
| Feature | Specification |
|---|
| Manufacturer | Genie |
| Product Type | Chain guide |
| Part Number | 33045A.S |
| Guide Position | Chain Guide B |
| Application | Select Genie chain drive garage door opener rails |
| Drive Type | Chain drive |
| Included Components | Chain guide only unless otherwise specified |
| Notes | Match by model diagram and guide position |
Also Known As / Related Part Numbers
- 33045A.S
- GE-33045A.S
- 33045AS
- Genie Chain Guide B
- Chain guide B for GCG / PCG series
- Related rail hardware may include 33224A.S spacer and 33352A.S chain stripper C, but those are not the same part
Technician Note
A chain guide failure is often a symptom of rail wear, chain slack, or misalignment. Inspect the chain tensioner, carriage, sprocket area, rail channel, and guide spacer before replacing the guide so the new part is not damaged by the same condition.
Before Ordering
- Confirm the opener model and rail parts diagram
- Verify the original guide is marked or listed as Chain Guide B
- Check whether the job also requires spacer 33224A.S or chain stripper hardware
- Inspect chain tension and rail wear before reassembly
- Do not use this part to replace a different guide position without diagram confirmation
Professional Advisory
Disconnect power and close the garage door before servicing the rail. If the chain is off the sprocket, the door is hard to move by hand, or the rail is bent, stop and have the opener and door system inspected by a qualified garage door technician.
Questions & Answers
Is Genie 33045A.S the complete chain assembly?
No. The 33045A.S is a Chain Guide B component only. It does not include the drive chain, bullet, carriage, or rail.
What models commonly use this chain guide?
It is commonly listed with select Genie GCG and PCG series chain drive openers, including GCG350, PCG400, and PCG600 style applications when the parts diagram matches.
Can I replace Chain Guide A with Chain Guide B?
No. Genie rail guide positions are not always interchangeable. Match the part number and position shown in the model diagram.
Should I replace the spacer at the same time?
Inspect the spacer and nearby rail hardware. If the spacer is missing, worn, or broken, it may need to be replaced separately with the correct part number.
What symptoms point to a worn chain guide?
Common signs include chain slap, scraping noises, poor chain tracking, broken plastic guide material, or a chain that does not stay centered in the rail.
