MX5400 Air-conditioning? ? ?

[K5lwq]

It might be a silly suggestion but do you have to push in on the switch to turn the compressor on? I do on my tractor. Otherwise it would just blow hot air.

 

[JC-jetro]

check the following.

1- discharge temp should be as low as 48 to 55.
2- Condenser coil should be clean as it adds to head pressure issue and lack of cooling.
3- Evap coil or inside coil should be clean as well, check the filter if any.
4-locate two hoses that go to the evap coil in the cab, the smaller uninsulated line is low pressure liquid line and the bigger dia should be your gas/vapor line. The liq line is always hot /warm and the vapor(low pressure vapor) line leaving the evap coil is cold. You should see clear condensation on the vapor line. if the line is cool to touch but not sweating then you most likely have low refrigerant that is caused by some leaks... no good, need to find the leak and repaired before adding refrigerant.
5- look at the magnetic clutch on the compressor to see if it is engaged, if not then you don't get cooling as a low pressure cut out switch in the system triggers and stop the clutch from engaging so you will not burn a compressor.

Just a few things to check. report back so we can disect it further.

JC,

 

[grsthegreat]

i freeze my butt off on mine when it was 106F outside. i cant begin to say how greatful that my wife talked me into a cab tractor back in 2010.

hope you get it worked out.

 

[jezreel]

Yep, I have the controls set correctly inside the cab. I'm in town on business until Friday, noon. As soon as I get back I'll check all the suggestions. And yeah, it is HOT inside, not even cool.

Thanks for all the suggestions. I can't wait to get home to check these things out.

 

[Hay Dude]

I bet your AC radiator is clogged with debris.

Dirt, dust an chaff in the condenser and/or evaporator can be a culprit,
as well as AC issues.

x2^
Bush hogging and hay mowing clog AC radiators up and AC performance drops. If the wind is blowing in the wrong direction, it can require cleaning every few hours on hot days.
Same of course with engine radiator.

 

[fruitcakesa]

My M would blow hot air on AC or fan only positions. Turned out to be a stuck heater valve.
I put an inline ball valve on one of the heater hoses and that solved the problem.
I will open the valve come colder weather to turn the heat back on.
Before I cut the heater hose I tested it by clamping one the the hoses with a vise grip and sure enough, cool air started coming from the ducts.

 

[JR4AL]

I have the MX6000, it will plug up the air cleaners in a hurry bushhogging. Cab temp goes up almost instantly. Keep a compressor close and blow out the filters and you are back in business.

 

[Williy]

Today it was 99 degrees and my a/c is set at full a/c fan on 2 and it takes about a min to start getting cold. I also put the window tint film on the windows. Didn't do a real good job on covering the windows didn't do the bottom of the doors and left a little around the edges of the door but for the most part windows are covered and it sure made a difference, don't need a sun visor tint is 35. Don't bother my legs as cool air goes down. Highly recommend putting the window tint on your windows! Wonder if taping a furnace air filter over the vents inside of the hood would save some time and keep the regular air filters clean??? Yes?? No?? bad idea???

willy

 

[RickB]

Pinch off one of the heater hoses and see if your cab is cooler. When the heat valve doesn’t fully close the heater will overrun the AC every time on every machine.

 

[sea2summit]

Today it was 99 degrees and my a/c is set at full a/c fan on 2 and it takes about a min to start getting cold. I also put the window tint film on the windows. Didn't do a real good job on covering the windows didn't do the bottom of the doors and left a little around the edges of the door but for the most part windows are covered and it sure made a difference, don't need a sun visor tint is 35. Don't bother my legs as cool air goes down. Highly recommend putting the window tint on your windows! Wonder if taping a furnace air filter over the vents inside of the hood would save some time and keep the regular air filters clean??? Yes?? No?? bad idea???

willy

Probably not a great idea, last thing you want is a big piece of cardboard to come loose inside the engine compartment when it’s running at high RPM brush hogging

I honestly haven’t even looked at my AC system, there’s got to be some sort of pre filter I would imagine even if it’s just window screening.