Re: Re: Re: Re: 1066 Update

Posted by Lee K. on January 15, 2001 at 01:32:22 from (205.160.206.85):

In Reply to: Re: Re: Re: 1066 Update posted by T_Bone on January 14, 2001 at 22:36:18:

The dealership in which I worked at had tried an R12 replacement known as Freeze12 to save the money of a convertion. They had nothing but troubles with it. Checking with other dealers they found out that John Deere for a while had a kit in which all the hoses, and basically the whole sytem has replaced. The price was around $800 if I remember corectly. After talking with a few other dealers and auto shops, a few had changed the compressor oil to an R134A compatible oil and flushed the lines with if I can remeber correctly, was air brake antifreeze. I think that the expansion valve was also replaced with an updated one. They never had any troubles with it. The dealership I interned at started doing the simple conversion as described a couple years ago and never had any troubles. To make sure that the system didn't leak, we had electronic reclaimers/recyclers, pull a vaccume for 30 minutes to rid the system of water and check for leaks. If that checked out we added black light sensitve dye to the system when recharging it and ran it, checking for leaks. With the proper oil, no R12 contamination with the R134A, and all the water rid of the system, there is no reason that the seals or hoses should fail. The compressors you buy now for an R12 and R134A system are identical, and use and oil that is compatible with both R12 and R134A. The high side preasure for R12 and R134 varies with ambient temp and moisture in the air. and can be almost identical or up to to a 50PSI or more variation. It also depends on if the system has an over charge. R12 can handle a slight over charge, but R134 expands at a much higher rate than R12. However if a converted system has a proper charge of R134, there is no reason why the old hoses and seals couldn't hold is. And if it is over charges, the system won't cool and the compressor will shut down. This is what I've learned while I was on my internship, and the AC class I took last fall. I'm pretty sure I've got it right.

Follow Ups:

• Re: Re: Re: Re: Re: 1066 Update T_Bone 07:58:28 01/15/01 (0)

Post A Followup Name: E-Mail: Subject: Re: Re: Re: Re: Re: 1066 Update Comments: Optional Link URL: Link Title: Optional Image URL: Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

TRACTOR PARTS	TRACTOR MANUALS

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 ]