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Evaporator replacement?

Rodney R on Sun June 13, 2010 5:22 PM User is offline

Year: 1992
Make: Ford
Model: F-250

First I thought I had a bad seal on the compressor shaft, so I put on a new compressor and drier..... My system still leaked, so the only place that my leak detector found anything was the foil that insulated the evaporator. So I removed the foil, took off the cover for the evaporator, and found what sorta resembles oil in the bottom of the case. So I got a new evaporator. Here's the problem - I'm used to evaporators and such that have some sort of fitting that threads apart. This evaporator has one fitting that threads apart, and the other looks like it crimps together. How does that work? I looked on my dad's '90 and '97, and it has the same setup. What looked like a 15 minute joib has suddenly exploded into a few weeks, the way things look. Is the orfice tube in the same area as well? I saw in the store there are 2 orfice tubes listed - what is the reason? This evaporator 'crimps' onto a pipe that is attached to a hose, and the hose goes to the condensor. It sorta looks like the hose/pipe section has the part that 'crimps' as part of it, and it looks like a one time use thing...... What kind of tools do I need, where do I get the hose, and will the hose/pipe have the fitting on it? I have more questions than answers.

Rodney

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'92 Ford F-250, 7.3 diesel

ACProf on Sun June 13, 2010 5:46 PM User is offline

I think you are describing the SPRING LOCK connector.

Auto supply stores will have the tool you need to open these connections. Basically the tool has a long circular nect that fits around the tubing(2) and spreads the internal circular spring(4) open so the flanged pipe end will come out of the fitting housing(5).



Edited: Sun June 13, 2010 at 5:47 PM by ACProf

Rodney R on Sun June 13, 2010 6:00 PM User is offline

My joint sorta looks like that, but it has no extra connector like you have illustrated on the outside - I assume the spring lock thing is a plastic? I think that I saw a gizmo like that (#5) on the '97, but not on my '92.

Rodney

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'92 Ford F-250, 7.3 diesel

mk378 on Sun June 13, 2010 6:09 PM User is offline

Piece #3 is used just to hold it together at the factory. It may be omitted with no ill effect (they're going to leak no matter what you do.) To disconnect, remove (3) if present, put the tool over the connection and push it into the bulge (5), expanding the spring (4). Then the lines can be pulled apart. The two o-rings (6) make the seal, so they should be replaced with new ones upon reassembly.

Rodney R on Sun June 13, 2010 7:10 PM User is offline

OK. There is a pack with o-rings in my box w/ the evaporator, and i saw that it does have some sort of round metal thing, I assume it to be #4. So I really just need a tool.... Is the orfice tube in there as well? Any reason to replace it while it's apart? Do they ever really wear out? I've never been around any (most of the systems I have had apart have an expansion valve) - it sorta looks like they are just a filter of sorts?

Rodney

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'92 Ford F-250, 7.3 diesel

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