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John Deere Tractors Discussion Forum
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4430 AC

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joelrand

05-23-2007 07:51:21




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The air in the 4430 doesn"t get cold. Everything appears to be working as it should. Can I recharge the system at home with walmart refrigerant?




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Glen in TX

05-24-2007 13:01:25




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 Re: 4430 AC in reply to joelrand, 05-23-2007 07:51:21  
R134A doesn't always work so well in those in high humidity areas but will work better when the whole system is changed over doing it right. Always change the drier and do a complete flush and clean out condenser and evaporator well when doing a conversion on a old one. You might find the leaks too. Raise the cab top too and clean it out! Compared to other rebuilts we use to have excellent luck with the rebuilt JD Delco Fridigaire A6 compressors but not some of the last ones lately. More than one aftermarket AC company supplies adapter kits for a newer style compressor more compatible with R134A for a lot less $$$ than JD. New hoses can be made at lots of local places reasonably.

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Brent Weaver

05-23-2007 19:44:15




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 Re: 4430 AC in reply to joelrand, 05-23-2007 07:51:21  
joelrand , on the back left fender attached to the inside of the fender wall next to the three-point arm is the receiver/dryer, hopefully there is a small round sight glass. With the air on and the tractor running at 1500 rpm see if there are any bubbles in the sight glass, if so you are low on freon also if you can here the clutch kicking on and off that is another sign of being low on freon. R-12 is still around can be pricey but worth every penny on cooling efficient then r-134. If unsure which you have the R-134 has quick attach coupler like pioneer tips, both male, one larger then the other where as R-12 are screw on threads. Any questions call me 815-262-1851. Kent you forgot a couple of steps that would of help your system cool even better. When changing over a system from r-12 to 134 any time a system is opened you need to replace the receiver/dryer, also while your doing all this you should also replace the expansion valve.

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cannonball

05-24-2007 04:22:07




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 Re: 4430 AC in reply to Brent Weaver, 05-23-2007 19:44:15  
I don't think the 4430 has a low pressure switch, the 4230 and 4040 we have here does not..


MAY GOD BLESS THE USA



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Bob

05-24-2007 06:01:50




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 Re: 4430 AC in reply to cannonball, 05-24-2007 04:22:07  
You never know about the pressure switches, as DEERE makes a kit to install them on the older tractors.



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Bob

05-23-2007 21:47:48




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 Re: 4430 AC in reply to Brent Weaver, 05-23-2007 19:44:15  
Brent,

If his system IS R-134, it will have bubbles in the sight glass, even when properly charged.

Adding R-134 to try to make the sight glass completely clear (as it would be with R-12) will result in an extreme OVERCHARGE of R-134, before all the bubbles go away.



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Brent Weaver

05-24-2007 18:44:56




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 Re: 4430 AC in reply to Bob, 05-23-2007 21:47:48  
Thanks Bob forgot to add that in the reply. Thanks, Brent



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DSK

05-23-2007 19:32:07




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 Re: 4430 AC in reply to joelrand, 05-23-2007 07:51:21  
K.B. is right. Government regulations on R-12 have made it so ridiculously expensive that no one can afford an annual recharge of a leaking system. If you do decide to do the R-134 conversion, stay away from the Deere rebuilt Delco compressors, they have terrible track record, I had several that lasted less than a year, and worse one that lasted two seasons...unfortunately Deere only warrants them for a year. Deere is now offering a Denso (Japanese) compressor kit for the 30-40 series tractors,it's been out about 2 years and I know of several tractors running these with no problems. When having the system repaired don't try to save a few dollars by cutting corners or the system will be empty again next spring.

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Kent Petersen

05-23-2007 19:15:11




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 Re: 4430 AC in reply to joelrand, 05-23-2007 07:51:21  
1500.00 wow i pull out the R12 flush the sym. change the oil to pag oil and refill with R134 no high priced hose kits or any other junk have done my 92 lincoln car 4430 8640 and 7720 combine have not had any problems Kent



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Bob

05-23-2007 07:56:05




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 Re: 4430 AC in reply to joelrand, 05-23-2007 07:51:21  
What refrigerant is it now, and what refrigeration oil?



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joelrand

05-23-2007 13:21:03




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 Re: 4430 AC in reply to Bob, 05-23-2007 07:56:05  
it has not been updated to the best of my knowledge. JD has serviced the tractor for everything in the past.



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K.B.-826

05-23-2007 17:01:36




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 Re: 4430 AC in reply to joelrand, 05-23-2007 13:21:03  
I do a ton of A/C work on older Deeres. First thing I do is stand on the step, turn the A/C temp control switch to the max cold position, turn the fan switch to any of the "on" positions, then turn the key switch to the "run" position (don't start the engine). You should hear a distinct clicking sound from the compressor clutch. If not, you've got a wiring problem, blown A/C fuse, or failed compressor clutch. If you can hear the clutch lock up, move on to checking the fan belts and compressor belt for being tight. Next, check the condenser/hyd oil cooler in front of the radiator for being plugged. Even if it looks clean, slide it out and blow/ power wash it out. Remove the hood, remove the two bolts on the right side, and slide it to the left. Don't have to slide it all of the way off it's brackets. Check the cab air filter by removing the panel right above your head while sitting in the seat. Post back with what you find and I might be able to help more. If it's got R-12 in it yet, you will not be able to recharge it yourself. R-12 is over $3 an oz. and that system holds 64 oz., so if it needs any more than a little R-12 added, it's best to just drop the $1500 to convert to R-134a and be done with it.

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