Farm Equipment - XT compression

Print Page | Close Window

XT compression

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=45632
Printed Date: 10 Sep 2025 at 4:15am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: XT compression

Posted By: captaindana
Subject: XT compression
Date Posted: 15 Feb 2012 at 4:51pm

tester kept working irradically today so I don't trust it at all. I took it to a local machine shop to see if I could verify it's accuracy. A Viet Vet / tractor guy I never met before started querring me as to what I was working on. He said to throw away the tester and reinstall my injectors, get them bled and remove the plug on the air intake line and aerosol WD40 into it while cramking. He said it will run on that enough to get running on diesel, and after warming up it will cure it's apparent compression woes. Has anyone heard of such an approach? He seemed knowledgable and said to trust him?! Comments pease!

Replies:

Posted By: jnicol6600
Date Posted: 15 Feb 2012 at 4:56pm

If its the one thats been setting awhile It sounds about right. If those cylinders are completely dry of oil there will be very little compression in my opinion. Once they get lubed up with heavy motor oil again it should come back If its not too wore out.

Posted By: Bob D. (La)
Date Posted: 15 Feb 2012 at 5:53pm

WD 40 is the best to use. It won't cause problems like starting fluid so should be a good way to try.

-------------
When you find yourself in a hole,PUT DOWN THE SHOVEL!!!

Posted By: Eric[IL]
Date Posted: 15 Feb 2012 at 9:24pm

It sounds like good information to remember for such situations of dry cylinders. 25 years is a long time.

I sure have enjoyed reading about your findings on the XT. I sense your anticipation about this tractor. I would be the same, maybe more... I hope it fires right up for you and runs alright. Please keep the posts coming.

Posted By: D-17_Dave
Date Posted: 15 Feb 2012 at 9:29pm

If you have the injectors out already then why not spray a little lube into the cylinders and crank it over. This should wet everything down good before trying to start it up.

-------------
Yea, I can fix that.....

Posted By: DanWi
Date Posted: 15 Feb 2012 at 9:49pm

Have heard others say to use wd40 as starting fluid, doesn't dry out cylinders like starting fluid and a less violent explossion. Just follow some of the advice in your other post and get some heat in the engine and try the wd40 and not when its sitting outside on a 10 degree day.