Farm Equipment - r40 ac charge

Print Page | Close Window

r40 ac charge

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=108898
Printed Date: 12 Sep 2025 at 5:43am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: r40 ac charge

Posted By: wheatbreeder
Subject: r40 ac charge
Date Posted: 12 Jul 2015 at 4:15pm

Does any one know how much a full charge is for the compressor

-------------
Farm stuff 8050,6690,175,F2,5050,WD

Replies:

Posted By: DougS
Date Posted: 12 Jul 2015 at 4:33pm

I'm no A/C expert but I believe it's usually based on high side pressure vs low side pressure, based on the outside air temperature while the unit is running.

Posted By: dkattau
Date Posted: 12 Jul 2015 at 8:54pm

About 4.3 lbs R-134a. Charge until the temp in the air ducts bottoms out and stop. You'll want the duct temp to be 20-25* below the outside temp.