Hydraulic issues and questions on 1975 Case 580b

[ANGUS BEEF]

Hi, im looking for some help advice on my 580b. I believe its a 1975 Diesel model based on the serial number. Ive owned it about 20 years and its served me well. Ive had atleast half the cylinders rebuilt over the years. I should add that i havent seen any other 580bs in my area that have a 3 point in the rear with a box blade. Looks factory to me. Every 580b i have ever seen has a backhoe on it. Mine does not. Anyway, when i first got the tractor i could pick up about a 800lb ballast barrel with the 3 point no problem. It may settle some every 10 minutes but worked well. Well....20 yrs later it picks up the box blade but if i work the tractor hard for 15 to twenty minutes it barely wants to pick the box blade up. Does a little better picking up if i cheat it by pulling first to levers in that 4 lever control bank. Any ideas whats causing that? Does the whole bank need to have new O rings installed? I can see that oil weeps out of the top of the main lift lever. Im assuming as the oil heats up and gets thinner its bypassing somewhere? Im just mechanically inclined enough to be dangerous...haha so i dont know if i could tackle a job of this caliber. The other issue im having is that last summer i lost the ability of having down pressure regarding the front end loader. Meaning i cant pick the tractor off the ground by extending the curl cylinders. Also the bucket will not stay in position if im trying to grade or scoop imto a pile. It just floats on top of the ground. My curl up, like curling a round bale for my cattle works but it weeps down very quickly. Main lift has good power with no issues. Is this most like a curl cylinder issue or loader control valve? Lastly, i was finally able to get the hydraulic oil canister off. This appears to be an inline filter that is on the right side of tractor just forward of the loader joystick. I have never changed it. I admit im terrible with maintenance. It is a paper element and when i removed it it had gobs of what looked like torn up paper stuck to element. The element was not wrecked that i could tell so i dont know where that stuff came from. I cant find the filter number for that specific in line hydraulic filter. Could someone let me know what the part number is? I will be changing out the filter in the pump housing again. I had a reman pump put in it about 10 years ago and last changed that filter about 3 yrs ago. Sorry for the novel but looking for that fikter number and any advice on my hydraulic issues. I would assume it could get very expensive if i have to buy a new rear control valve for three point. Tractor just keeps running and i love the box blade as i have lots of gravel roads on my property. Wanna keep the 580b going as long as i can. Injection pump is starting to leak bad to so i just dont know how much i want to stick in the tractor but when i price anything newer and cant justify spending that king of money either. Thank you for reading my novel.

 

[hydraulichec]

Service Motor co @ Dale wi would be able to get that filter for you. As far as hydr troubleshooting, it would be best to have a pressure gauge and or flowmeter to know whats all going on. But just a guess, cylinder seals are a wear item. And wear out, and then leak down or settle or leak externally. My guess is you still have worn cylinder packings? As far as the debree in your filter? I'm also wondering if it could have lodged crap in your relief valve as well causing weak pressures? Again proper pressure/flow testing should be done. Good luck.

 

[Tinkerer]

Welcome to HEF, AB !
Do you have the operators manual and, or service manual ?

 

[ANGUS BEEF]

Thank you. No i do not. I know i need to buy one so i have a better understanding of how everything is put together. Wondering which one is the best to buy? Also thanks Hydraulichec

 

[ANGUS BEEF]

I was curious if you have seen many 580b's with factory(im assuming it was factory maybe im wrong) box blades like mine. Usually ive only ever seen backhoes. My other question is if i ever found a rear hoe for mine that was for sale, which ones would work or if any and what would one expect to pay for a decent used one? Thank you.

 

[stinky64]

AB ebay is loaded with quality reprints of owners,parts and service manuals...orrrrrr I'm sure Tinkerer is about to hook ya up digitally.....I believe it was ThePumpGuy who suggested a dollar per peek fee would make Tinkerer a very wealthy man

 

[thepumpguysc]

Lol.. THAT sounds like something I’d say.. lol

 

[stinky64]

Poke and hope is still my favorite......

 

[Welder Dave]

Back in the 60's/70's it was common to see tractors with just loaders and no backhoe but a 3 pt. hitch. There were even some models where you could switch between a backhoe and 3 pt. hitch. Box blade was the most common attachment on an industrial loader tractor. 3 pt. still works off hyd's. so could be bad seals or a pump getting weak.

 

[Tinkerer]

I'm pretty sure the three point hitch is covered in the service manual.
I gotta look some more for the operators manual. It is somewhere in my computers.

 

[Tinkerer]

Found the link !
---------> https://www.minnpar.com/manuals5.aspx?FName=case (cnh) manuals&SFName=cnh (case) loader backhoe manuals&SSFName=backhoe (case) 580 series parts manuals&SSSFName=CASE 580B

Be sure to download the parts manual. CNH royally pooched the online parts book.

 

[stinky64]

That info's gotta be worth a buck....at least to cover the NASA maintainence fee.....

 

[ANGUS BEEF]

Thank you for the link. I dont understand what the power beyond is in the hydraulic circuit when ive researched others post. Im assuming both control valves for loader and for 3 point are all powered by the pump up front? Ive also noticed over the years ive owned the tractor that i get a slight weep of hydraulic fluid from a 90 degree fitting that attaches to that in line hydraulic filter canister just forward of my front end loader joystick. Im wondering if there used to be a guage of some sorts on there? It looks busted off and possibly welded or ground off as if the threads from the guage broke off? Anyway....thats another leak i need to care of and find out what filter that calls for to replace it. When i took it apart it appears to me it just floats in there. Nothing holds the filter in place?

 

[alrman]

The power beyond fitting is found at the loader control valve.
It is simply a fitting with a tail piece that seals an internal oil gallery that sends pressure to the backhoe control valve or in your case, the three point linkage valve.
The internal oring could be blown #26 below.
There are a number of different hydraulic valve/filter configurations - a machine serial number will be required to be specific.

The middle pic shows the filter set up you could have - using Case D75831 filter kit

Third pic is the donaldson version of D75831 (P550133) 66mm OD x 30mm ID x 180mm L

The pics show different filter types - but the third pic is what I remember goes in the 580B.

 

[ANGUS BEEF]

 

[ANGUS BEEF]

Thank you ALRMAN

 

[ANGUS BEEF]

Thank you for the information. So am i correct that nothing really holds that filter in place? It just sits in the canister ? When i took it out there was nothing holding it in any certain spot.

 

[alrman]

The canister holds the filter in place - just be certain the filter is attached to the filter head correctly.

 

[ANGUS BEEF]

Ok. Thank you. The filter is smaller and narrower than the canister, atleast the one the previous owner had in there so that why i was curious. Do you just kinda push new filter up into top of housing and screw cannister on? Sorry for the dumb questions

 

[ANGUS BEEF]

Oh and is it best to fill canister like half full with hydraulic oil before screwing if back on or can it be dry? Thank you. Nite.