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.

Discussion Forum
:

MF50 Crying Time

Welcome Guest, Log in or Register
Author 
Bob Miller TN

01-28-2002 14:26:41




Report to Moderator

Here's the real life predictment.Chronicled as best as I can at present.
My dad left me a 1962 MF50 with 6943 hrs. on meter engine never been touched. The tractor runs well but leaks and burns oil and clutch is iffy.
I make a deal with the local MF tractor dealer. for an overhaul. The mechanic replaces sleeves pistons, rings, valves,springs,oil pump,rebuilds starter,generator rebuilt, radiator rebuilt, replaced complete clutch assembly. The tractor runs very well.The mechanic tests for 30 minutes. I drive tractor toward my house very cautiously slowly, a three mile trip. Approx. one fourth mile from home a hill to go up. The tractor tightens up and locks down and the engine stalls. I am dumbfounded, the tractor restarts, but with major smoke and much blowby from engine. I go ask mechanic for advice, he is also dumbfounded. I return tractor to dealer and mechanic attaches to a DYNO and applies load. The tractor runs less than four minutes and locks up engine. Tractor runs well without load, no misses. The mechanic takes the engine down again. He finds cylinders # 2 and # 3 have major scoring on piston and sleeves. What Happened! The mechanic has 40 years experience, he cannot believe he screwed up that bad. I am about two thousand into this project now. I have a very bleak outlook.
Bob Miller East Tennessee

[Log in to Reply]   [No Email]
MF50 Crying Time Chapter II

01-31-2002 03:48:45




Report to Moderator
 Re: MF50 Crying Time in reply to Bob Miller TN, 01-28-2002 14:26:41  
Bob Miller- Chapter II - MF50 Crying Time
The dealer has agreed to rebuild engine, yet again, at his cost. I sure do appreciate all the forum feedback I received on this project. I have relayed many of the items to the mechanic that is doing the second rebuild. I feel for the mechanic he is kind of depressed about the situation. I am sure he feels he made a tragic mistake on the engine assembly process. I am anxiously awaiting the "next" engine test and I will insist on DYNO testing before I move the tractor from the dealer. Probably the worst consequence of the whole episode is that I am now very shaky and nervous about any sort of major tractor engine repair. The Murphy's Law syndrome I suppose. Thanks to all, I will keep everyone posted as to the outcome
Bob East TN

[Log in to Reply]  [No Email]
Marcel Gosselin

01-31-2002 11:17:31




Report to Moderator
 Re: Re: MF50 Crying Time in reply to MF50 Crying Time Chapter II, 01-31-2002 03:48:45  
Good choice on getting it dyno. I had an engine rebuilt 3 years ago. My mechanic would not let me drive the tractor 10 miles to town to dyno it. So we had to have it hauled to town. As I understand it diesel engines have to have the rings seated by putting the engine under some load. Not sure how much load or how long, but the dyno was the place to do it.



[Log in to Reply]  [No Email]
bcPA

01-30-2002 22:42:11




Report to Moderator
 Re: MF50 Crying Time in reply to Bob Miller TN, 01-28-2002 14:26:41  
crud in conn rod oil passage comes to mind. If mech. did job nice and claen the right way this should not be the case.



[Log in to Reply]  [No Email]
ErnieD

01-29-2002 17:05:56




Report to Moderator
 Re: MF50 Crying Time in reply to Bob Miller TN, 01-28-2002 14:26:41  
You went to a dealer and paid the long buck to have the job done right. In driving it home the engine seizes? They duplicate it on the dyno? Should not cost you a nickel. How many new tractors get unloaded and hooked up to a plow and run wide open?

Either the ring gaps were too tight, pistons too tight or cir clips broke on wrist pin.

Again its not your problem, its the dealers.



[Log in to Reply]  [No Email]
olddog

01-29-2002 14:28:55




Report to Moderator
 Re: MF50 Crying Time in reply to Bob Miller TN, 01-28-2002 14:26:41  
Couple more variables: Ambient temp and oil viscosity. .. .. .. Oil has got to get between all the pieces! They make new sleeves & pistons everyday and I hope the dealer see's it; your way. Cheer up. You'll be working the MF soon enough. Take care of dad's tractor. That's what I'm doin.



[Log in to Reply]  [No Email]
Leo

01-29-2002 05:31:43




Report to Moderator
 Re: MF50 Crying Time in reply to Bob Miller TN, 01-28-2002 14:26:41  
It sounds like the Mechanic is at least liable for the parts. It sounds like he has already admitted that he screwed up. Besides, the dealership should have given some kind of warranty??? I know that if it was my tractor, they would definately be the ones paying to fix it this time. was there any damage to the Valves? Did the Rings break and cause the damage? Almost sounds like they got a bad set of rings. I would hope that they would replace all the rings if this is the case, just lucky that the other cylinders didn't also fail??? I know it's almost impossible any more, but did they use American parts??? I try to avoid any foreign parts possible. Unless, they were perkins rings, obviously they should know what is needed in their own engines. Good Luck and keep us posted as to your progress. Leo

[Log in to Reply]  [No Email]
Wayne in Knoxville

01-28-2002 19:50:13




Report to Moderator
 Re: MF50 Crying Time in reply to Bob Miller TN, 01-28-2002 14:26:41  
Man, I feel your pain.I am eager to hear what everyone else thinks.I don't have a clue.Is it diesel? Do you think mechanic may have used a bit too much starting fluid. At 40 yrs. experience he probably knows the limit.I've seen what it can do to internals and won't use it.



[Log in to Reply]  [No Email]
Bob Miller

01-29-2002 04:37:44




Report to Moderator
 Re: Re: MF50 Crying Time in reply to Wayne in Knoxville, 01-28-2002 19:50:13  
Yes, the MF50 is a Diesel with the A3-152 Perkins Engine. He states that the problem does indeed resemble too much starting fluid, however, he also swears he did not use any. I have never used any of the stuff on any of my tractors. He is also very shocked. He says that even if he had been stupid enough to not use any oil in the piston assembly process he doubts if the damage would have been as severe. I am very nervous as to how this scene will play out. I have one of the pistons on my desk that came out of the engine after forty years of use, it is not damaged as bad as the new one with only two plus hours of operation. I hope we find something. Thanks for the inquiry.
Bob

[Log in to Reply]  [No Email]
J.Simmons

01-30-2002 20:37:11




Report to Moderator
 Re: Re: Re: MF50 Crying Time in reply to Bob Miller, 01-29-2002 04:37:44  
Perkins uses the thin sleves.If he did not use the right length tool to put them in it can and will make them oval. Which can be fixed by boreing after installing .Sounds like alot of trouble but I know from experiance. I have a AC 175 w/236 4 cld same problem to the T .Just my 2 cents



[Log in to Reply]  [No Email]
Wayne in Knoxville

01-30-2002 17:49:06




Report to Moderator
 Re: Re: Re: MF50 Crying Time in reply to Bob Miller, 01-29-2002 04:37:44  
Bob please let us know what developes! I agree with the others,you should not be responsible for this.I'm sure this is strange situation for you.Perhaps you could talk with Big Dean when he gets back from CA. He is an expert!



[Log in to Reply]  [No Email]
Jack in NB

01-29-2002 10:59:28




Report to Moderator
 Re: Re: Re: MF50 Crying Time in reply to Bob Miller, 01-29-2002 04:37:44  
Ouch.

We've had four similar failures in the Perkins 152/203 engines caused by overheating, and one from excess ether. The ether caused cracked liner tops and broken rings. The overheating caused scuffing.

Overheating resulted from overloading, plugged rad, failed thermostat - and operator not paying attention to the temp gauge.....

The Mack engine Failure Analysis Manual lists several scuffing causes: Overheating, Marginal lubrication, Insufficient clearance, Improper cyl and piston finish, Improper break-in, and Oil oxidation. From your description, the first or third would seem possibilities.

Overheating causes:
cooling system not operating properly
loss of coolant
excessive fuel (overloading, lugging)
retarded injector pump timing
restricted air intake
insufficient piston cooling (unlikely on the Perkins, unless the con rod bearings are too tight)
loose sleeve fit

Insufficient clearance:
incorrect piston to liner clearance
tight sleeves (causing sleeve distortion)
tight piston pins
incorrect ring gap or fit in grooves

Perhaps these may provide some clues.

The plus - the dealer warranty....

Please let us know what you find.

[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