Posted by psbhouston on July 10, 2014 at 10:09:05 from (64.253.68.106):
I could use some advice. I have a Kubota M9540. The evaporator in cab was plugged. Cleaned it out and now it blows strong air thru the system. I hooked up manifold gauges and both Low/High side pressures were too high. (50/350).
I am sure that one of my guys added freon in the field and overcharged and introduced air into system. I evacuated the system and checked for leaks. None noticed. The systems holds 1.87 to 2 lbs of R134. I charged it with about 20oz and pressures are already back to 40psi Low / 280psi High. Air temp at vent is 67degrees so its cooling a bit - but what am I missing?
Manual says clean condenser / check "heat sensitizing tube and expansion valve??? What is a heat sensitizing tube?
I thought expansion valve would not cause high pressures on both sides? But - I know only enough to be dangerous. Need help please - don't want to kill the system.
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 ]
Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
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.
