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

Shop Now

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

Farmall & IHC Tractors Discussion Forum
:

m farmall with low oile pressure

Welcome Guest, Log in or Register
Author 
Bob Tedford

07-14-2007 19:27:22




Report to Moderator

Ok! My mom gave me my dads M Farmall,now that he passed. He and My cousion over hauled it two years ago. The oil pressure gauge didnt work. My cousion told dad that the old, rod bearing looked like they had been leaded in. They put new bearings in,which i think they are not the rite size. The oil pressure is good cold,but once it warms up after a while i drops the more you run it.It doesnt get into the red,but close. He also said the rod caps may be strached. I want to fix it this winter,and i hope i can with out tearing it all down. Any help ??

[Log in to Reply]   [No Email]
Janicholson

07-16-2007 10:32:53




Report to Moderator
 Re: m farmall with low oile pressure in reply to Bob Tedford, 07-14-2007 19:27:22  
Interactive Even contested intellegence) is not uncommon on forums. We all need to be civil, but free discussion is good.
The pressure in your lube system should be 10psi at Idle hot. If it is above that, and not knocking, things should be OK. I would use 15-40 Rotella, or RPM Delo oil in the tractor to see if it makes a difference. The cover plate on the oil pumps have been shown to be a problem, and can be sanded flat on a plate glass surface with 200 silicon carbide paper followed by 400 grit to polish. Use non directional even pressure to flatten the cover. The end clearance on the pump should be between .0008 and .001 The gaskets are very thin, and used as a shim to adjust this clearance. If I took off the pan and found no issue with the oil pump, then I would plastigauge the mains and rods (.001-.003 are fine More is bad)
Try the oil thing first, then the pump, then the bearings in that order. JimN

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

07-15-2007 19:15:45




Report to Moderator
 Re: m farmall with low oile pressure in reply to Bob Tedford, 07-14-2007 19:27:22  
OK! guys lets get along,i wasnt here for everyone to fight. WANTING to fix my Tractor! Can i drop the pan cheack the clearences and maybe just put in new bearings? Or will i need new rods also. Im sure that the clearance isnt rite,or if it was i would have good oil presure,never rebuilt an M before. Just wanting to know if i can drop the pan and do this, is it possible to drop the pan and maybe put in new rods that way??

[Log in to Reply]  [No Email]
georgeky

07-15-2007 22:06:25




Report to Moderator
 Re: m farmall with low oile pressure in reply to Bob Tedford, 07-15-2007 19:15:45  
Bob, the rod bearings have nothing to do with oil pressure.



[Log in to Reply]  [No Email]
Hoss in Maine

07-15-2007 07:51:05




Report to Moderator
 Re: m farmall with low oile pressure in reply to Bob Tedford, 07-14-2007 19:27:22  
last engine i know of that had splash lubed rod bearings was model t ford. there may be others since then .



[Log in to Reply]  [No Email]
georgeky

07-15-2007 07:34:25




Report to Moderator
 Re: m farmall with low oile pressure in reply to Bob Tedford, 07-14-2007 19:27:22  
I do agree with Gene. These tractors in almost all case will loose most oil pressure after being worked and the oil warms and thins. If it runs 7 lbs or more it will be fine. If the rod bearings were in very bad shape it would be knocking and or rattling. When tractor is warm it is very normal for pressure to drop to very low on the gauge when idling. Lots of these gauges simply are not accurate to start with, so I would get a good test gauge and see what it says before tearing it down and spending 1500 dollars that may not need to be spent. I have farmed with these things for nearly 40 years and have never seen one that didn't drop oil pressure significantly. I have sevaral that I use on a very regular basis and all of them loose quite a bit of pressure after warming. Even on a fresh overhaul. You can also get a feel of how well it is oiling by getting it warm and removing the valve cover to see how much oil is getting to the top of engine at an idle. Like John, I have never heard of rod caps stretching either.

[Log in to Reply]  [No Email]
Joh nM

07-15-2007 06:33:25




Report to Moderator
 Re: m farmall with low oile pressure in reply to Bob Tedford, 07-14-2007 19:27:22  
Ive never heard of stretching caps, not saying it cant happen. IMHO, it would be easier to just drop the pan, and do the oil pump first. If the wrong size bearing were put in, again IMO, the oil pressure wouldnt have been right from the start.



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

07-15-2007 05:44:26




Report to Moderator
 Re: m farmall with low oile pressure in reply to Bob Tedford, 07-14-2007 19:27:22  
Thanks guys! They said the rod caps mite be streached. and with the new bearings,they just put them in,didny check any clearences.Why i dont know? Ill get the information and do it rite. I want it to have full oil pressure. it starts at 75 and drops have way down. thne at idle its almost in the red!



[Log in to Reply]  [No Email]
gene bender

07-15-2007 02:36:40




Report to Moderator
 Re: m farmall with low oile pressure in reply to Bob Tedford, 07-14-2007 19:27:22  
Not unusual for the pressure to drop when warm. Mite want to try a guage with lbs on the dial for a better reading. You can check the bearings with some plastic guage material that any auto parts store would have. They would be glad to tell you how to use it. Dont sound like too bad of a problem that you have now.



[Log in to Reply]  [No Email]
jakee

07-14-2007 22:49:08




Report to Moderator
 Re: m farmall with low oile pressure in reply to Bob Tedford, 07-14-2007 19:27:22  
drop the pan and check the gasket on the the bottom plate of the oil pump



[Log in to Reply]  [No Email]
Jason Simmerman

07-14-2007 21:17:01




Report to Moderator
 Re: m farmall with low oile pressure in reply to Bob Tedford, 07-14-2007 19:27:22  
Sounds to me like you have bearing clearances out. Rod bearings are usually splash lubricated (I'm not sure on the Farmall M if it is or isn't) but in any event, the things that have the most effect on engine oil pressure is clearances in the pump, main bearings, and cam bearings. Might need a complete overhaul, but those are the things that can cause questionable oil pressure.



[Log in to Reply]  [No Email]
gene bender

07-15-2007 02:31:24




Report to Moderator
 Re: m farmall with low oile pressure in reply to Jason Simmerman, 07-14-2007 21:17:01  
whatever makes you think the bearings are not pressure lubed if you dont have correct information dont post any. no wonder these old wives tales get spread.



[Log in to Reply]  [No Email]
Jason Simmerman

07-15-2007 05:57:10




Report to Moderator
 Re: m farmall with low oile pressure in reply to gene bender, 07-15-2007 02:31:24  
I didn't say the engine wasn't pressure lubricated, I said in most cases the rod bearings are splash lubricated, and I went so far to say that I haven't had an M apart so I can't say for sure. If the rod bearings are splash lubricated they will have no effect on oil pressure. Don't go off on me when you have the inability to comprehend and read... I said the three major things that have an effect on oil pressure is oil pump, main bearings and cam bearings. Now, think about this why would I say that if they weren't normally directly lubricated via an oil galley in the block, in which the tolerances between the bearings and the cam/mains on the crank are what cause the resistance in the system to give it "PRESSURE". Please read fully before you try to rip my head off, because it makes you look an A$$!!!

PS: Please capitalize the first words of your sentences. It makes things real hard to read.

[Log in to Reply]  [No Email]
randy hall

07-15-2007 07:48:11




Report to Moderator
 Re: m farmall with low oile pressure in reply to Jason Simmerman, 07-15-2007 05:57:10  
jason you should take it easy on your replies. i can understand that if you are an oliver or old chevrolet man that you could think 'most' engines are splash lubed like a model t. farmalls haven't been splash lubed since ih quit making f-20's.



[Log in to Reply]  [No Email]
John M

07-15-2007 06:29:20




Report to Moderator
 Re: m farmall with low oile pressure in reply to Jason Simmerman, 07-15-2007 05:57:10  
While I dont agree with Genes way of putting it, I have to agree with what hes saying.What is it that makes you think "most" engines are splash lubricated? Im not knocking you, just wondering where you get that.



[Log in to Reply]  [No Email]
Jason Simmerman

07-15-2007 07:55:22




Report to Moderator
 Re: m farmall with low oile pressure in reply to John M, 07-15-2007 06:29:20  
Almost all engines employ some form of splash lubrication throughout them. Even the most modern high revolution V8's and 4 cylinder engines employ this type of lubrication. I just looked at the 8N lubrication system in my FO8 manual and it shows the mains and rods to be lubricated by a passage in the crankshaft. The governor, cylinder walls, and wrist pins are lubricated by a splash system from a spray system. A SBC motor uses a pressure system from a passage in the crankshaft to lubricate the rod bearings. The mains and cam bearings are also pressure lubricated. Everything else is splash lubricated in a SBC. I have also assembled a couple of LS1 motors and the rods, wrist pins, cylinder walls, valvetrain minus cam bearings ect ect are all splash lubricated. The timing gears are the same. Only things that is pressure lubricated on a LS1 is the mains and cam bearings. Like I said I haven't torn an M motor down that far or looked at an M oiling diagram so I might be incorrect, but in any event if somebody posts up the oiling diagram for an M that would probiably end all debate.

[Log in to Reply]  [No Email]
teddy52food

07-15-2007 08:32:10




Report to Moderator
 Re: m farmall with low oile pressure in reply to Jason Simmerman, 07-15-2007 07:55:22  
What is a SBC & LS1 engine? Small lawn mower engines are splash oiled, but most others are pressure lubed. 2 cycle are different also.



[Log in to Reply]  [No Email]
John M

07-15-2007 08:19:37




Report to Moderator
 Re: m farmall with low oile pressure in reply to Jason Simmerman, 07-15-2007 07:55:22  
I undertsand now what you are talking about. Yes, the rods and mains are pressure lubricated in an M.



[Log in to Reply]  [No Email]
MN Scott

07-14-2007 20:34:42




Report to Moderator
 Re: m farmall with low oile pressure in reply to Bob Tedford, 07-14-2007 19:27:22  
Sounds like its going to need the crankshaft removed, measured and reground to bring everything back to specs. To do this the engine must be removed from the tractor and disassembled. Then all parts must be cleaned and measured and machined if needed and new bearings installed. You might as well do it right and the engine will last for thousands of hours. Do a patch job and it will cost you more as most likelly somthing will fail taking other parts with it.

[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