Family owns a 1980 IH 686. During the recent cold snap in Indiana we noticed the hydraulics weren't working. My dad thought water had gotten in the hydraulic line and frozen, so he decided to change the hydraulic oil. We did so. But after running the tractor about 15 minutes the new oil began to gush out of a small hole under the battery. The hole is supposed to be there from what I can tell. Every subsequent time I've used the tractor the same thing has happened and now the tractor is almost out of oil and having is very hard to steer. Any thoughts on what went wrong and what can be done to fix it?
- Thread starter patrick79
- Start date
Are you talking a diesel tractor with two batteries. One mounted on left side near rear wheel. If so, that is the transmission breather and should have a little breather cap on it. If the oil is foamy that comes out, you are sucking air in system. Most common aeration problem is iced or plugged filter causing cavitation on those models. Other one is the return tube inside the rear frame. Can be filter gasket also if you changed filter and didn't use new gasket or get all of old gasket off.
To check filter for sucking air in, smear grease around the edge cover and see if it gets sucked in. To check return line, remove third arm connection plate at rear and reach in. I believe that model will have a steel line running all the way from top under cover to where it directs oil right back into the main pump suction tube. Any thing moving on that tube means trouble. Early tractors had a hose connecting main suction tube to upper short piece of steel pi
To check filter for sucking air in, smear grease around the edge cover and see if it gets sucked in. To check return line, remove third arm connection plate at rear and reach in. I believe that model will have a steel line running all the way from top under cover to where it directs oil right back into the main pump suction tube. Any thing moving on that tube means trouble. Early tractors had a hose connecting main suction tube to upper short piece of steel pi
BarnyardEngineering
Well-known Member
- Location
- Rochester, NY
If you didn't get the tractor inside and completely thaw it out before dumping the oil, you didn't get any of the ice that's causing the problem.
Thank you for your comments and sorry for taking so long to respond - for some reason I thought I'd be emailed when my post got a
reply. I think I've fixed the problem. After looking at several schematics on the shop manual I determined that the small hole
under the battery was a plug for the power steering pump. On closer examination the whole was threaded, so, after consulting a
local mechanic I plugged it with a 3/8 bolt and seal. That seems to have done the trick. I can only guess when the plug was loose
when the new fluid was put in, and that the pressure pushed it out. Thanks again for your help.
reply. I think I've fixed the problem. After looking at several schematics on the shop manual I determined that the small hole
under the battery was a plug for the power steering pump. On closer examination the whole was threaded, so, after consulting a
local mechanic I plugged it with a 3/8 bolt and seal. That seems to have done the trick. I can only guess when the plug was loose
when the new fluid was put in, and that the pressure pushed it out. Thanks again for your help.
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