4440 a/c compressor

Lwh4207

New User
Hello I am new to this forum. I have a 4440 that I put a new a6 style aluminum a/c compressor on two years ago ,and never had a minutes trouble or recharge since I put it on. Last week I was brush hogging and when I got done for the day I blowed the radiator and condensor out same as i always do, and the next morning I got on and my compressor was locked up. I called my mechanic buddy and he said the compressor was shot and that I should go to sanden style compressor with extra condensor kit, so I just got all the parts in and we going to put it on today. I was wondering if anybody had tried the sanden style compressors on older tractors and what kind of luck you had? Thanks
 
Works pretty well. A nippendenso kit is much better
than either. I assume you'll flush the system replace
exp valve and reciver? If you don't you'll most Likly
have metal filings in the system. I also assume you
have a high and low switch update installed with the
sanden. If not done bother fixing as the pressure will
take out shaft seal.
 
What about the updated hi low switch? I had a mechanic friend order a Sanden style compressor for me that I haven't picked up yet, but don't know anything about the hi low switch. TIA!
 
The AP Air kits that I have been using come with a Hi and a Low switch that fit onto the compressor manifold, easy to install and a good idea.. Way better than the fuse to ground system of old..
 
I sure hope so. I also have a 4040 with the same aluminum a6 compressor. I will probably switch it over to the sanden style when it goes out. I keep them both blowed ,if conditions are really dusty they get it daily.
 
Replying to this because I just changed out to a Sanden and blew the plug in relay. Did not change expansion valve and wondering if this may be the problem. Going to try and monitor the system a little closer. No leak on freon.
 
(quoted from post at 20:23:39 04/27/19) Replying to this because I just changed out to a Sanden and blew the plug in relay. Did not change expansion valve and wondering if this may be the problem. Going to try and monitor the system a little closer. No leak on freon.

Define "plug in relay", please.

Gonna GUESS you mean "thermal fuse", which is not an electrical overload fuse at all, but a device that "opens" (with no reset function) if a temp switch senses high suction gas temperature and activates it's "time delay before permanently blowing" function.

NOT sure how that suction gas temperature switch is carried forward in your Sanden conversion, though.
 
Relay I was referring to.
mvphoto35233.png
 
(quoted from post at 21:56:58 04/27/19) Relay I was referring to.
mvphoto35233.png

So it appears the kit included a relay to switch power to the AC clutch.

That relay "blowing" would be an electrical issue (perhaps just a bad relay) and NOT an expansion valve or other refrigeration issue.
 
Replaced the relay and all seems ok. Not as cold as I would like but a lot of factors involved I know. Didn't think I could tell a lot of difference between low cool and high cool. Any ideas on that?
 

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