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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Illinois 770 egg-nog oil

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bluediesel

02-17-2005 09:55:11




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What would you do? My hydraulic oil was the color of egg-nog, so I'm draining it, pulled the filter, and removed the couplers to drain the lines. I bought a Fram filter for the first change, and a Agco for the second if needed(Fram has cardboard ends and are half the price). Can I make "jumpers" and connect my lines in a loop to "run" the system, or do I have to plug in a cylinder(s) to create back pressure to some degree? Can I wash out the rest of the bottom with something or will I do more harm than good? I'm going to use 15W Pennzoil hyd. oil(was cheap at Farm and Fleet). Please comment on anything good or bad, Thanks.

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oleblu

02-17-2005 17:42:41




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 Re: Illinois 770 egg-nog oil in reply to bluediesel, 02-17-2005 09:55:11  
If I were you I'd take the entire hydraulic unit off and dismantle it to get it clean. It's not complicated, just a little time consuming. Remove the PTO shaft from the rear of the tractor and remove the shifter, being carefull not to loose the 2 springs into the tranny. Now remove the bolts that hold the hyd unit to the tranny. Since you have a 770 I'd guess it has a unit with the levers on the top. Remove the levers and the top. Next, remove the resivoir (tank)and you will see the valve bodys attached to the base. Look at your base. You will probably be surprised how much GUNK settles there. I feel this is where you need to do your cleaning, as all I've had apart always look nasty. There are 4 bolts holding each valve body to the base. I usually remove them and clean the valve bodies with no more disassembly. If I remember right, all the oil does not pass through the filter each time. Your egg-nog oil must have water in it. Check or replace your rubbers where the levers enter the top of the tank. If you have more questions, drop me an e-mail.

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bluediesel

02-17-2005 21:34:20




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 Re: Illinois 770 egg-nog oil in reply to oleblu, 02-17-2005 17:42:41  
Thanks to both of you, and I did change the rubber boots yesterday. Thats the only way I thought the water could get in.

Bob



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Mike (WA)

02-18-2005 08:26:23




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 Re: Illinois 770 egg-nog oil in reply to bluediesel, 02-17-2005 21:34:20  
I wonder how many millions of gallons of tranny and hydraulic oil have been ruined by disintegrated rubber boots? I believe the continued use of rubber boots must be being promoted by "big oil" interests- elsewise, everyone would have gone to the cute little metal umbrella which is part of the shift lever on my IH 504- works great!



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Don-Wi

02-17-2005 15:11:46




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 Re: Illinois 770 egg-nog oil in reply to bluediesel, 02-17-2005 09:55:11  
Sound's like you got the right idea. Should work just fine to do it as you say.
Donovan from Wisconsin



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