Air is leaking from the part in the photo. This one is on the front "passenger side" tank.
What is it and how do I repair it or do I just replace it?
Thanks.
Just replace it as they no longer supply the replacement diaphragms for the pressure protection valve.
They run about $15 so shop around. You can get Haldex brand all the way down to cheep knock offs so you be the judge.
Here is a link to get you started 90555397 - Pressure Protection Valve - Haldex product (https://www.haldex.com/en/na/valves-9c82abc0/pressure-protection-valves/haldex-pressure-protection-valves/90555397/)
Mike
Link to thread that might help answer your question in more detail, plus a few more part numbers for your perusal:
Air Leak from this valve (https://www.foreforums.com/index.php?topic=36655)
Thank you for the help identifying the part and the links. I updated the subject of the post to make it easier to find now that I know it is a pressure protection valve. I though it looked similar to a regulator.
How do you determine the correct pressure setting to use?. Looking at the links referenced posts I found two numbers: 90555396 is a 65/70 psi and 90555397 is an 80/85 psi valve.
All the ones I have used were 65/70