I run a 06 putzmeister on a mack, I'm having a issue with it dropping out of high idle after it starts pumping. I can start pumping again right after but it drops again. 

Based on the information you provided, it seems like your 2006 Putzmeister pump mounted on a Mack chassis is experiencing an issue with the high idle function. The high idle is dropping out shortly after you start pumping, causing an interruption in the pumping process. Here are a few things you can check or consider:

1. Check the high idle solenoid: Ensure that the high idle solenoid is functioning properly and not sticking or failing to maintain the high idle position. A faulty solenoid can cause the issue you're experiencing.

2. Inspect the wiring: Check the wiring connections related to the high idle system, including the solenoid, switches, and relays. Look for any loose, damaged, or corroded connections that may be causing intermittent issues.

3. Verify the hydraulic system pressure: Ensure that the hydraulic system pressure is within the specified range. Low hydraulic pressure can sometimes cause the high idle to drop out.

4. Check the electronic control system: If your pump is equipped with an electronic control system, such as a Putzmeis ter Ergonic system, there might be a fault in the control system causing the high idle to disengage. Check for any error codes or messages on the control panel display.

5. Contact Putzmeister support: If the issue persists after checking the above points, it's recommended to contact Putzmeister's customer support for further assistance. They can provide specific guidance based on your pump model and troubleshooting steps.

Putzmeister's main contact number for support is 800-890-0269 (24/7).

Remember to always prioritize safety when troubleshooting and working on your concrete pump. If you are unsure about any steps or need further clarification, do not hesitate to reach out to Putzmeister's support team or a qualified technician familiar with your specific equipment.