Hi mnusbaum,
Thank you for using the Support Forum. I am going to assume you are using a Phaser 6140 since there is not a 1640. For the issue you are seeing please check that the rollers are installed properly and are clean. You may need a new roller which you can order and install. Please consider contacting your support centre for further assistance.
After printing 2 or 3 pages, the printer stops with an error - "Load Tray 1"
The Tray has paper, and the printer will start again when I pull the Tray out and push it back.
However, I can never print more than 3 pages at a time.