OK, I want to update this and try to get some more help.
I pressure tested the oil cooler and the air compressor and they're both good. I wasn't able to find a radiator pressure tester, but it wouldn't have done much good as you can't just jerk the pan off this engine cause it sits in a cradle with supports underneath that are too close.
I put everything back together and ran it with the overflow tube in a bucket of water. Had quite a few bubbles at first and then a few more after a couple of minutes, then the bubbles stopped. I let it run for 30 minutes or more while checking for any bubbles, but had none. I noticed in the manual that you're supposed to bleed the system of air when you pull it down as far as I had it, but that was after the fact. I pulled the oil plug on it the next morning and no sign of coolant. I ran it 30 more minutes and no bubbles at all this time. We ran the hydraulics on it to put a load on it too.
So I figured that the little bit of water in the oil that I'd found originally (just enough to be noticeable and cause the steam out the blowby) had came from a pretty violent 4" rain that we'd had a couple of weeks ago. I figured that the rain cap had gotten blown up and an exhaust valve was open to the cylinder.
We decided to start crushing again on Thursday. As soon as we started putting a load on it, it blew coolant out of the overflow tube but stopped shortly after. It's a little low on coolant in the radiator but runs perfect otherwise with oil and temperature normal. When you add coolant to it, it pushes it back out until it gets down to the same level which is below the bottom of the radiator neck.
There is still no sign of coolant in the oil after two days of running. I'm having the crew to check for moisture in the filler cap and to make sure there's no steam coming out of blowby tube as it's out in the country and I've got an urgent miss in another 6068 in an excavator that I was moved to.
I'm wondering if combustion is getting underneath a liner flange and pressurizing the radiator causing this?
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
... [Read Article]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
