Farm Equipment - ac 7045 overheating

Print Page | Close Window

ac 7045 overheating

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=58099
Printed Date: 08 May 2025 at 8:11pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: ac 7045 overheating

Posted By: firecowallis
Subject: ac 7045 overheating
Date Posted: 10 Oct 2012 at 3:53pm

Gage on tractor starts out fine after about 5 min of work Gage is showing 250 plus we pulled the thermostats and still the same with infer red heat sensor radiator shows between 200 and 220 we have a new sensor ordered tractor do sent seem to be boiling over till today when plowing it kept pouring antifreeze out of overflow im thinking bad cap am i on the wright track what is normal operating temp for 7045

Replies:

Posted By: Lonn
Date Posted: 10 Oct 2012 at 4:21pm

Is this a new to you tractor? Is the foam around the radiator still intact? Needs to be there. Is the fluid foaming?

-------------
-- --- .... .- -- -- .- -.. / .-- .- ... / .- / -- ..- .-. -.. . .-. .. -. --. / -.-. .... .. .-.. -.. / .-. .- .--. .. ... -
Wink
I am a Russian Bot

Posted By: BRYAN H
Date Posted: 10 Oct 2012 at 4:23pm

HEAD GASKET OR A CRACKED HEAD. HOW HP DO YOU HAVE. I HAVE PUT THE AFTER COOLER ON THEN. THEY WILL RUN COOLER. ALSO CHECK THE RADATOR.

Posted By: firecowallis
Date Posted: 10 Oct 2012 at 4:32pm

radiator is full checked when started today no foaming just nice green antifreeze out of overfull hose will check
on foam around radiator whats normal temp on this tractor thank you all for the help

Posted By: firecowallis
Date Posted: 10 Oct 2012 at 4:33pm

hp 156 on dino i just purchased the tractor

Posted By: tbran
Date Posted: 11 Oct 2012 at 12:29pm

after many years, we have found this trouble shooting method on 7000 - 8000 with over heating problems. 1st there are different radiators OEM'd at factory - same od , different in number of core thickness front to back. MAke sure you got correct radiator.

a 7010 will fit a 7080 but will not cool it.

#2 fill and run until thremostats opens or in your case yours is out - let idle - remove cap - then quickly rev up to full rpm - fluid should drop 3" or so then slowly come back - no over flow or bubbles. This tells you your core is clean and water is circulating and water pump and head gasket is ok. #3 remove the shorud and pressure wash the radiator after loosening and pivoting the front coolers away from the radiator. 99% of the time the outside behind the shorud is plugged. It may take an hour to clean it. Just becasue one can see through most of it - if the fins are layered with dirt - it will not cool. IF one does not remove the coolers crud will be blown into the coolers and when dry suck back right in the radiator. - Again remove the shourd and set it back.

7000 and 8000 series we engineered to eliminate the problems of the 210 220 of having a marginal cooling system to the tune of best I can remember 50%.

Under 70% load you should read just over 180 degrees F 100 % load 200 degrees.

After years of service probably will go 190 and 210 degrees -

Posted By: firecowallis
Date Posted: 13 Oct 2012 at 11:30am

thank you this was a great help didnt know that radiator woud drop when raved up i know it circulates good but while watching found that it had some bubbles in fluid i think that makes it bad head i think i learn so much from this sight you people are awesome for sharing your knowledge and please vote for the tractor restore project at chevron

Posted By: firecowallis
Date Posted: 19 Oct 2012 at 4:01pm

got my 7045 back today they fixed all kinds of stuff they pulled the head and planed it they said it was warped new foam kit around radiator looks and runs like new thank you to all who helped me diagnose her greatly appreciated