firetruck dvr.
New member
- Joined
- Jun 22, 2008
- Messages
- 7
Hello guys. I have an 08 4320 with 650 hours that I purchased in May. It had 610hr when I bought it. It has started making a squalling noise when I have an implement on the back. It does this after it gets hot. When you raise up it does it. Then when it "maintaines" that position it squals. When it does this you can see the power beyond loop jump. I have changed the filters and fluid, as well as the in line filter in power beyond circuit. I read on here somewhere about this same thing but can't find the thread now? I think it's a weak Check valve spring? Also when you leave the lift up and kill the engine the lift leaks down, further making me think it's a check valve? It's an ehydro also. My dad has an 06 4120 power reverser with 800ish hours that is doing the same thing! We are mechanically minded and can usually fix anything but this has us scratching our heads! Thanks in advance!