John Deere A/C recharge question??? (2555)

[slowzuki]

And I don't know the refrigerant number (it does have one) but propane makes about the best possible R12 substitute. If your system is leaking you really need to fix it though. Don't park inside a closed garage in my opinion. There is info on the internet.

 

[Willl]

the refrigerant number

R-290

And yes, it does make a decent refrigerant, but it plays heck on seals and oil migration.

 

[tallyho8]

Being in the air conditioning business for 38 years, I can't count the number of customers who have burned out their compressors or destroyed their units other ways by overcharging their units with refrigerant or using the wrong kind.

Many people think that if adding a little refrigerant makes their unit cooler, that adding a lot will make it a lot cooler. I've had hundreds of people come to my shop saying that their unit wasn't cooling enough so they added refrigerant and now it isn't cooling at all. Many times I just let out enough refrigerant to get it down to the proper amount and they started working correctly again. But since you can't be sure of exactly what the customer did to the unit, it is best to vacuum it down and start from scratch.

 

[Willl]

I just let out enough refrigerant

You mean you recover enough refrigerant.

 

[boxygen]

My neighbor seems to have the same issue on his 2555. We hooked up the recharge kit assuming it was low but it was in the "red" zone which says too much refrigerant. We didnt add any. It doesnt appear the compressor is kicking on when the AC is turned on in the cab. I thought it might be electrically related that maybe a fuse was blown when it tried to compress too much gas in the system. No sign of a fuse block anywhere in the tractor either. We took the cowling off around the dash but it wasnt evident what is what without a shop manual. Anyone have a shop manual or Wiring diagrams?
Am I correct in my thought process that usually the AC clutch system is like an electromagnet that clamps the spinning front pully to the compressor when current is introduced to it, like an electric clutch for a lawntractor or somethign similiar? Just trying to help out my neighbor who is very helpful to me.