Farm Equipment - K2 Gleaner A/C problem

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K2 Gleaner A/C problem

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=129022
Printed Date: 18 Dec 2025 at 2:29pm
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Topic: K2 Gleaner A/C problem

Posted By: scott in tenn
Subject: K2 Gleaner A/C problem
Date Posted: 20 Sep 2016 at 9:21pm

The compressor on my K2 is building the head pressure so high it is locking up and slipping the clutch. Let it set awhile and equalize and it will turn free. Everything was replace new in the system 3 years ago. I am thinking that it has something to do with the expansion valve but would appreciate some other advice. Thanks in advance. Scott

Replies:

Posted By: tbran
Date Posted: 20 Sep 2016 at 9:43pm

WHAT ARE THE PRESSURES, Probably should be about 80-90 static - 225 high and 15 low. If the low goes vacuum and the high hits the hp relief pressure shut off valve - the expansion valve is stuck shut. IF the low is 30-40 and the high is 300 plus the system is over charged. High head pressure is also caused by a clogged condenser core or fan motors not working.

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When told "it's not the money,it's the principle", remember, it's always the money..

Posted By: Tcmtech
Date Posted: 20 Sep 2016 at 9:51pm

Got good air flow through the condenser?

If not that will drive your system pressure up to the trip out or belt slipping point real easy.

A plugged expansion valve or valve screen may do it but usually unless you have the system over filled there is not enough refrigerant in the low side to push the high side up that far. You will simply start to pull a vacuum on the low side which takes the load off the compressor and the system just stops cooling at all.

Posted By: scott in tenn
Date Posted: 21 Sep 2016 at 6:26am

Thanks for the reply! I will do some more checking first and let you all know what I find to be the problem. Thanks again. Scott