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.

Massey Harris & Massey Ferguson Tractors Discussion Forum
:

Compression poundage vs. ratio in mf-35

Welcome Guest, Log in or Register
Author 
Craig in Denver

03-24-2005 12:06:09




Report to Moderator

I tested compression in my mf-35 & found all cyl's to measure 102-112 psi. Can I figure whether I have a regular (6.6:1) or a high altititude (8.?:1) engine based on these compression #'s

Thanks Craig




[Log in to Reply]   [No Email]
deerhound

03-25-2005 08:23:20




Report to Moderator
 Re: Compression poundage vs. ratio in mf-35 in reply to Craig in Denver, 03-24-2005 12:06:09  
If you know your tractor"s serial # it will have an H in it if it is a high altitude engine.. MY tractor is SHM XXXXX X. A regular lower compression engine will have a G in the number, SGM XXXXX . There is a High Altitude decal at the botom of the dash. There is a plate on the engine just above the distributor that says do not operate below 5000 ft. on the high altitude engine. There is also a decal stating that the engine is high altitude only under the access door on the hood. Hope this helps.

Dale

[Log in to Reply]  [No Email]
Jerry/MT

03-24-2005 19:10:21




Report to Moderator
 Re: Compression poundage vs. ratio in mf-35 in reply to Craig in Denver, 03-24-2005 12:06:09  
My educated guess is that you have a 6.6:1 copression ratio. The nominal "new pressures" would be around 125-130 psi and the min acceptable is a round 85-90 psi.If you had an 8:1 compression ratio, you'd be looking at something like 131-145 psi based on your 102-112 psi numbers (More like 165 psi if it were brand new.). These assume that you don't have a worn out high compression engine. I'm not sure how you can positively tell whether you have a a "high altitude" engine or not. Maybe someone more knowledgable about the subject than I can tell you.

[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