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  1. I've had my 5288 for over 20 years. Never had ac work worth a hoot in my opinion. It had 134 in it when I bought it. Couldn't get air vent temp more than 15 degrees under ambient temp. Replaced receiver drier and expansion valve, no difference, has Duracool freon since 134 was always an issue keeping in the system. I have used this type freon in dozens of tractors with good results. Last summer I replaced the compressor with a new York, replaced the radiator and the condenser with a high efficiency unit from AP Air. Didn't matter one bit. Less than 50 hours on those parts. I have an auxiliary condenser to add to the other one inline but haven't got it on yet. Planting beans with it today it was livable in there but not great. 82 degrees and 30% humidity, low humidity any AC doesn't work well. When filling the planter I had it idling at 1300 or so RPM, at that engine speed it doesn't cool at all. Needs to be 1800 or so to even feel cool air. My 5488 has the exact same setup and works great, but the 5488's have a bigger fan and move a lot more air. With the new radiator everything in the system is as clean as it can be. I know it's hard to keep the bottom half of the radiator clean. Only thigs not replaced are hoses and evaporator. I had the roof off last summer and evaporator is pretty clean too. Seems to me a lot of these models have this problem, just a poor design?
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