Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Attention Forum Users: On the 28th of December 2023 at 9:00am Central Time, we will be taking the forums down for maintenance while we prepare the new forums for your use. Please click here for more information.

John Deere Tractors Discussion Forum
:

My 4020's weeping

Welcome Guest, Log in or Register
Author 
Pat P

08-23-2006 22:38:02




Report to Moderator

I bought my 1968 4020 six years ago and been using it for hay. Hour meter says 2950. Works great and has been reliable.

I noticed the holes on the side of the block have a light oily film about 1 1/2 inches around. Dust collects there nicely. My mechanic tells me this is where to look to see when the engine will need an overhaul. It"s been running great and doing what I need. How much oil should I see when it"s time for the overhaul???

The engine rpm varies about 50 rpm with a NH426 baler (sharp knives) and I"m wondering if that isn"t a sign of a tired engine or reduced hp. I had baled with 43 hp tractor before the 4020 and had larger rpm swings. I wasn"t sure what to expect with the 4020.

[Log in to Reply]   [No Email]
Pat P

08-24-2006 23:01:56




Report to Moderator
 Re: My 4020's weeping in reply to Pat P, 08-23-2006 22:38:02  
Thank you G/Man and Bob. I wasn't terribly worried as the film is light. Just didn't know when to see something and realize something bad was happening inside. I didn't want to be happily baling and have the engine seize up when I needed it most. I clean off the holes when I start the hay season and keep an eye on them.

We've jokingly called the "wonderful" mix of coolant and oil "uni-lube"... I've seen the results and am not interested in havng it happen to me.

I was told it was a 1968 when I bought it, but the serial number table on this site says it's a 1965. Older machines don't bother me. They're usually built stronger. I had been baling with a Freeman 25 and a 1952 25A (with original knotters) before getting the 426. Great balers making good bales, but the ground speed was too slow. I found myself riding the 4020 clutch in 1st gear over most of the field. Strong left leg by the time I was done.

[Log in to Reply]  [No Email]
720Deere

08-25-2006 04:03:03




Report to Moderator
 Re: My 4020's weeping in reply to Pat P, 08-24-2006 23:01:56  
Be very careful and keep a close eye on the oil. If the coolant starts to make it's way past the oil o-ring, it doesn't take long to wipe out the crank. Last one I saw was only run a few hours and cost over $7,000 to repair. By the way, this was an engine with less than 1,200 hours since a major rebuild. Some mechanics just don't understand how important it is to not roll or tear those o-rings when you install the liners.

[Log in to Reply]  [No Email]
G/MAN

08-24-2006 07:47:39




Report to Moderator
 Re: My 4020's weeping in reply to Pat P, 08-23-2006 22:38:02  
Bob is correct. Those weep holes lead to a groove located between the two o-rings sealing the liners in the block. The upper o-ring seals coolant "up", and the lower one seals oil "down". What normally happens is those holes get plugged, coolant starts leaking down and the pressure in the cooling system forces coolant past the lower o-rings into the crankcase, where it gets into the oil and ruins the bearings. The only real fix is to replace the o-rings and possibly the liners since they obviously have to come out. If your liners show little wear on the inside and little or no corrosion on the outside, it's possible to hone them and install new rings and reuse them, but normally common practice is to simple replace the liners, pistons and rings. I wouldn't worry too much about the rpm swing on the baler, as most tractors will surge like that on a square baler. Blowby, oil consumption and compression are the real indicators of internal engine condition.

[Log in to Reply]  [No Email]
Bob

08-24-2006 01:25:48




Report to Moderator
 Re: My 4020's weeping in reply to Pat P, 08-23-2006 22:38:02  
A little oil, seeping past the lower sleeve "O" rings, and out the weep holes is the least of your worries. When coolant leaks past the upper sleeve "O" rings, out the weep holes, and potentially down into the crank case, THEN you have something to worry about!



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
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 ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

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.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy