new compressors come with PAG oil in them. if yours was a conversion, it probably has Ester oil in it. I would flush complete system with DuraFlush, available at NAPA. replce drier accumalator, if orfice tube style control valve replace it, if exspansion valve check it for debri and clean. If you know total system capacity when it ran R12, reduce it by 80% for R134. For oil, use a pag oil , use compressors recommend weight for it. use old R12 system capaicity for oil. split it up, if 8ozs, put 2 ozs in condensor, 2 ozs in evaporator, 2 ozs drier, 2 ozs compressor. Spin compressor shaft by hand after oil is put in so it coats evenly inside compressor so it does't liquid lock when first engaged. Put vacuum on system take it down to 29-30" for 20 minutes or so. The vacuum will boil out any moisture(H2O)in system, make it dry. Shut down vacuum pump, and then wait 5 minutes, and check to see that system holds the vacuum. if doesn't it has a leak. recommend putting 1/8th oz A/c dye in at this time makes it easier to find any slow leaks later in system. If system calls for 3 pounds freon,deduct 80%,(28.8ozs) then charge as close as possible with 12oz cans( 2cans). Ok to be low a bit, but not good to be over charged.First can will be sucked right in by vacuum in sysytem without even running compressor. Best to get all info you need about old r12 capacities and use them. too much oil it won't cool, too little freon it won't cool well. put pencil thermomter in ducts in cab. if you get it down 45 to 50 degrees idling, and not moving you in the safe range for compressor.Why 80% you ask for freon...R134 compresses into a liquid at higher pressure, and exspands more volume back to a gas than r12.
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 - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
... [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.
