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
:

Tight Overhaul

Welcome Guest, Log in or Register
Author 
Clay

02-18-2002 12:05:29




Report to Moderator

I just finished reassembling my TO-20 after getting it back from the machine shop. With the plugs removed no rocker arms installed yet the engine feels tight. It takes an 18" Cheater bar on my adjustable wrench to pull it through. I would guess about 50-75 ft/lbs to move the crank.
How stiff should a new rebuild be? Should I pull it around awhile with another tractor or go back into it? The crank turned by hand, it must be piston rings but the ring gap looked fine.
Rebuilt 6V starter won't budge it. On 12v the starter tries to move it but stalls out.

[Log in to Reply]   [No Email]
Chip

02-22-2002 10:02:24




Report to Moderator
 Re: Tight Overhaul in reply to Clay, 02-18-2002 12:05:29  
One of the most important things I learned when rebuilding engines is that you constantly rotate the engine during assembly, install the crank, then the main caps, torque from center out, and after each torque, we would rotate the crank, and continue in that process as we went along, that way, if it suddenly got tight, you most likely could look to the last task you performed. Too many people just assemble everything, and then they wonder why it's tight, but now every task is suspect. Makes for a long day. I found vaseline is a great rebuild lube, it sticks well, yet when engine comes up to temp, it will always melt away, especially when you pack seals with it.

Good luck

[Log in to Reply]  [No Email]
Gregg/oh.

02-19-2002 21:30:16




Report to Moderator
 Re: Tight Overhaul in reply to Clay, 02-18-2002 12:05:29  
.
Rebuilt 6V starter won't budge it.


Even though the 6 volt starter should turn you over, the rope rear main seal on these engines can really make a engine crank hard, worse when put in dry. I put together the whole engine then install the rear main (lower) last. to get idea how the engine turns over. If the rear main rope seal was left a little long,after cutting to size, I have these engines flat locked up.after the rear main cap torqued down. hope this helps.

[Log in to Reply]  [No Email]
twopop

02-18-2002 18:50:47




Report to Moderator
 Re: Tight Overhaul in reply to Clay, 02-18-2002 12:05:29  
you say the crank turned by hand,whoch it should have,but i cant turn a crank by hand when the rods are on.so i would check the rod caps,see if one is on backwards.or take one loose and turn engine.check one at a time,until you find the tight one,or so.i would bet on the rod caps.dont pull it around or you could score the crank.you may need to plastigage the rods.



[Log in to Reply]  [No Email]
Ray,IN

02-18-2002 19:07:29




Report to Moderator
 Re: Re: Tight Overhaul in reply to twopop, 02-18-2002 18:50:47  
I agree, you say your ring gap is correct so that rules out incorrect piston to cylinder measurment. That only leaves the rod bearings. Did you use a mixture of STP and motor oil when assembling everything or similar mixture? The initial lubrication is critical, and pulling it will not build oil pressure quickly enough to prevent bearing damage or breaking a ring(s). Follow twopops advice and eliminate each rod,recheck bearing alignment and recheck tolorances. A little extra time now will guarantee engine longivity.

[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