What holds the gear on the shaft that moves the printer cartridges back and forth

[Tedtor]

The gear at the right end of the shaft falls off. I don't know what supposed to hold it on the shaft. I have pictures.

[sandytechy20]

@Tedtor

Welcome to the HP support community.

I understand that the gear inside the printer is falling off, I am glad to assist you.

This seems to be a hardware issue.

I request you to talk to HP support.

They might have multiple options to help you with this.

1. Click on this link - https://support.hp.com/us-en/contact-hp?openCLC=true
2. Select the country.
3. Enter the serial of your device.
4. Select the country from the drop-down.
5. Click on "Show Options".
6. Fill the web-form. A case number and phone number will now populate for you.

Keep me posted.

To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.

Cheers.