A/C Temperature?

[jenkinsph]

My experience working on tractor A/C systems (Specifically Ford and New Holland) does not agree with the commentary regarding recirculation.

Don't know about other brands but with the Deere cab I have there is no place for a high flow of air to exhaust from the cab to the outside. In order to have a high flow at the vents it has to recirculate.

 

[Tx Jim]

My experience working on tractor A/C systems (Specifically Ford and New Holland) does not agree with the commentary regarding recirculation.

Rick
You may not be referring to an '80 model Ford but my Ford 6700 has air re-circulation door behind the operators head. I think my 5610 had a similar door also.

 

[RickB]

I'm going to clarify my thoughts a little here and then I'm going to exit this thread. I know enough about A/C to have successfully serviced a few dozen or more systems in tractors. Most, if not all have operable recirculation vents that in my neck of the woods generally are closed to recirculation more often than open. For purposes of troubleshooting and repair, a system that is capable of vent temps 30 degrees below ambient measured at the vent when drawing the maximum possible volume of air from outside is considered to be fully functional. Recirculation of cooled air will drop the vent temps and cab climate further. Whether or not anyone accepts these comments as valid is totally immaterial to me, I'll sleep OK tonight one way or another. I have a satisfied customer base and a reputation as a decent (or better) service tech when I was so occupied, and that's what I care about.

 

[murphy1244]

Very good explanation:thumbsup: Rick. 30 degree's is what I was taught.

 

[jenkinsph]

I'm going to clarify my thoughts a little here and then I'm going to exit this thread. I know enough about A/C to have successfully serviced a few dozen or more systems in tractors. Most, if not all have operable recirculation vents that in my neck of the woods generally are closed to recirculation more often than open. For purposes of troubleshooting and repair, a system that is capable of vent temps 30 degrees below ambient measured at the vent when drawing the maximum possible volume of air from outside is considered to be fully functional. Recirculation of cooled air will drop the vent temps and cab climate further. Whether or not anyone accepts these comments as valid is totally immaterial to me, I'll sleep OK tonight one way or another. I have a satisfied customer base and a reputation as a decent (or better) service tech when I was so occupied, and that's what I care about.

I think most of us agree with a 30 degree drop at the vents.

Experience, very handy to have

 

[trook]

Problem Solved!!! If I have this right, there are two heater hoses coming from the engine that eventually traverse through the top of the cab to allow a change in temperature of the ac/heat system. The hoses were hooked up backwards where the enter the bottom of the cab. The air is now blowing very cold! Hopefully, this will help any of you who have the new 5055e-5075e cabs that do not blow cold air.

 

[jenkinsph]

Good to hear you have it fixed.:thumbsup:

I know you need the air to work in the Delta for sure.

 

[The Fred]

Problem Solved!!! If I have this right, there are two heater hoses coming from the engine that eventually traverse through the top of the cab to allow a change in temperature of the ac/heat system. The hoses were hooked up backwards where the enter the bottom of the cab. The air is now blowing very cold! Hopefully, this will help any of you who have the new 5055e-5075e cabs that do not blow cold air.

Very good fix. Many heater coolant valves rely on pressure/flow to seal properly so being backwards it would never stop the coolant flow completely.
Glad you got it.

Fred

 

[grsthegreat]

holy cow.....how did that get thru production check list. good find.

 

[94BULLITT]

holy cow.....how did that get thru production check list. good find.

Probably some guy on the assembly line did it to mess with a poor mechanic.