Cleaning centrifugal oil filter

[slowalker]

Hi
Just doing first oil change on this used 7245 since I bought it .It has the centrifugal oil filter.The manual describes how to take it apart and clean it.I have it apart and my question is there is a black oily[ THING] on the inside of the rotary portion that is sticking to the inside and is about 1/4 inch thick.
Is it just a sludge buildup or is it some sort of absorbent pad that catches the sludge??
I tried to remove it but it wants to break into pieces so I think it is just a sludge buildup.
The manual does NOt say anything about a pad/filter inside the rotary portion.
THANKS

 

[slowalker]

OK I figured it out ,it is just a bunch of sludge that has built up ,I cleaned it up and put it back together making sure the scribe marks lined up.

 

[ricc]

its amazing just how much sludge there is in some of them,

 

[slowalker]

What amazes me is I have never seen a diesel engine where the oil stays so clean.Most diesels turn the oil black within a few minutes of an oil change.
The oil in my Zetor was still clean looking when I changed the oil and it had not been changed in 2 years.