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Old 08-30-2017, 05:37 PM   #231
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Yeooow!! I will say on average the biggest killer of compressors is contaminents in the system .. receicer dryers should be changed when changing a compressor..

Next on the list is bad condenser cooling.. clogged coils, intermittent or bad relays, or bad fan motors..

Over charging and under/ over oiling is the biggest thing people do to them on their own.. I've never spent 900 on a compressor not even a new one. Remans by a good company are usually ususially pretty good. Sanden compressors are usually pretty tough cookies..
Christopher
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Old 08-30-2017, 07:03 PM   #232
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The $900 figure was the cost of 2 compressors + tax + shipping... That would be brutal for a single one!
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Old 09-01-2017, 02:07 PM   #233
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Ok some progress happened!

I replaced both compressors yesterday. I researched at length the amount of oil required and could not get a solid answer, so like a pro I guessed. Using my shiny new manifold gauges, we carefully added refrigerant and kept an eye on pressures and chilling, and determined there is something wrong with the rear unit. With just under 40 psi on the low side, we had good cold air but high side pressures would climb to 350 and hit the cutoff.

The front unit is pushing cold air with the high side around 220.

For now I have bled off pressure from the rear unit to keep the high side below 250, it doesn't seem to be chilling air but it won't accidentally grenade. For now we will just use the front until I am able to find a shop or something to help address the rear.

Also, I have a leaky fitting on the high pressure side of the rear system. I am leaving a coupler attached to keep it from draining but that obviously needs to be addressed next time it gets touched..




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Old 09-01-2017, 04:37 PM   #234
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Are the fans on the condensors running for both units? Sure sounds like dirty coils or bad fans on that rear. As I mentioned in the PM , 220 is not out of range for the front unit if it was a really hot day. Do disable your rear unit. No need to bleed off the Fresno just don't turn that unit on. Or unplug it's compressor..
do check the coils for dirt on the condensers .. too bad your not near Ohio or Florida or id jump in with ya to tackle it
Christopher
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Old 09-01-2017, 06:03 PM   #235
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It's not a really hot day, 92. I ran a spray nozzle on the radiators, diet cane out but I had already bled off the pressure from the rear. I cant least it in a condition where it could accidentally get turned on and cause a problem, that means for now I don't know if the house helped until I get my hands on more refrigerant..

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Old 09-01-2017, 06:11 PM   #236
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220 is not too far off for a 92 degree day esp since the bus was likely hot inside. spraying them down is a stop gap.. you need to drive east!. . it was only 57 and rain here in ohio today...

this was the picture inside my bus today..

IMG_2193.jpg

-Christopher
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Old 09-01-2017, 07:27 PM   #237
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Honestly man I wish I could get the bus to you because your knowledge of these things is far beyond mine and I have had a combination of talking to "professionals" who seem to know even less than me and talking to shops who for whatever reason can't or won't touch the bus.

I have some semblance of working AC for the front unit. Next time I'm near a walmart I'll pick up another bag full of their cheap r134a ($4.88 per 12oz can vs $20 per can everywhere else) and see if I can bring that unit up to where it should be. I'm hoping to not need the rear unit for a while.
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Old 09-02-2017, 02:14 PM   #238
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Back on the road. Huge thanks to our new friends Steve and Angela. You guys rock!


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Old 09-02-2017, 02:42 PM   #239
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Yeaaay!!!! A rolling bus is a happy bus!!!!
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Old 09-03-2017, 10:17 AM   #240
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I wish this weren't only the case when falling off a mountain.

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