"Belly Filters"

This is just a comment on several issues we have had in the past year. For some reason we are having problems after a filter change - with after market and OEM filters - with customers having a complaint of no hydraulic flow. About 10% of sales. The problem is either the filters are a very small degree shorter, or are 'crushing' a very small amount and not allowing the 'trap door' to fully open.  What we are doing is removing the cork gasket from the old filter and glueing it to the new one. That is working. IF too thick a gasket is added it collapses the filter. IF the cork can't be removed a 'made' thin gasket will work.   The symptoms are noisey cavitating remotes, especially when cold, and steering issues.   

Edited by tbran - 19 Jan 2025 at 8:39am

Thanks for that info- what kinda glue works for that?

We always use to roll on an Oring of the right size diameter onto the screen and then place the screen in the end of the filter as usual. Oring fatness was approx 1/4" to be sure the door got opened plenty. Oring for reused for the next filter change. I'd been doing that for 40 years because we had some problems a long time ago, so it became just a standard practice for us.

I've changed filters and fluid on a 7010 recently, and the remotes make that cavitating noise a lot, especially when cold. I'll look into adding an O-ring as doc suggested, since I've already discarded my filters. 

Are all OEM Agco filters being made correctly?

7000 and 8000 series had different sealing Orings. The 8000 are larger in diameter than the 7000 series. Make sure you have the correct ones, I learned this the hard way. Even had a parts guy tell me there isn’t a difference but there definitely is.

These belly filters are a little intimidating. I've always tried to pay attention to the order of things as they come apart and reinstall accordingly. A good video of the procedure would be helpful. There are instructions with AGCO filters but after Tim and Doc's comments I start second guessing things. Do the filter housings(the big tube) ever get pulled and those orings replaced? I never have. What is the little sender on the rt side return filter head for? Isn't that what turns on the HYD filter light? That light is on a lot on my PD 8070 but everything seems to work ok. I changed both filters when it first started  flickering to no avail. I've chased that wire and can find nothing wore through to ground it. Often wondered it some metal particals are in the sender causing it to make contact and ground out. I may be off base and not understand how it works.