Re: Tractor AC compressor

Posted by Texasmark1 on July 23, 2020 at 11:45:21 from (172.243.92.145):

In Reply to: Re: Tractor AC compressor posted by racered57 on July 23, 2020 at 06:42:20:

Of the comments, you are closest to my current situation.

Accessed the expansion valve and removed it...has a capillary line and an equalization line. I can see why the evaporator mfgr included it in the evaporator
assembly package with one tractor part number rather than separating it out at the component level.

Disassembling the input (hollow) hex screw and removing the spring, I found it gummed up whereby it be surely could have been hampered in being
compressed by the capillary line (sensor) diaphragm when told to open, or not reseating the ball valve when required and the space around the ball valve
where freon was to move when unseated was pretty dirty also. Acetone and a wire brush cleaned the spring and cotton swabs with acetone cleaned the
cavity. I checked online and couldn't find a BF153GD. I had the tractor running when I found it and the TXV was completely frosted up. Recalling that is a
symptom of blockage, not allowing enough volume of freon past the valve to keep the input warm and the expansion effect within the evaporator......check
me on that if you would.

Agree that the compressor can put out a 300# differential...belt is tight, condenser and evaporator coils are clean inside and outside. Blew 100+
compressed air through the whole system and got what I would call adequate air flow.

I did find a bit of oil in the high pressure line from the compressor up to the TXV but not more than a couple of table spoons full.....doubt that would be
considered oil loading the TXV.

Since I can't find a BF153GD expansion valve on the www, I am forced to ensure my current one is as clean as possible and put it back in. Then on the
vacuum, I will stay at it...especially since I had most every connection open today, and get all the moisture I can out of it.

I checked my numbers on the capacity of the system and it verified the numbers for me as once I had put in the full amount and still had some left in the
can, not but a few minutes and the high pressure shot up into the 300# range while the low side was 10 or somewhere low.

Do appreciate you guys time and thoughts. We'll see how this saga plays out.

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