We have a 2004 schwing P305. These models have a volume control knob. It recently became stuck and I cannot budge it. Has anyone had this issue

The flow control on a SP305 is just an adjustable orifice with a needle valve. if it is stuck it must be from corrosion or cement dust or dirt. I would take needle stem out and clean and lube.

Schwing P305 Volume Control Issue

Based on the information shared by service professionals in our community, the volume control knob on a Schwing SP305 is essentially an adjustable orifice with a needle valve. If it's stuck, this is likely due to one of these common issues:

• Corrosion
• Cement dust accumulation
• Dirt/debris buildup

Recommended Solution

The recommended fix is to:

1. Take the needle stem out
2. Clean thoroughly
3. Apply lubricant
4. Reinstall the component

This is a relatively straightforward maintenance task that should resolve your issue.

If you need additional assistance, you might want to contact Schwing's technical support at 1-888-SCHWING (1-888-724-9464).