Tb180fr AC

[Don.S]

So the takeuchi tb180fr machine i sit in has a problem with the ac. Now that is is fall you would think that is not a problem but it is still hot as hell in there and even with the side door open it is still 97f inside. So today i tilted the cab up and opened the ac unit up and to my surprise the inlet to the evaporator was cold and covered in frost but when i touched the evaporator it was not cold. I have not put any gauges on it yet but the compressor did not cycle off in the 15 minutes i was looking at it. Hope to put the gauges on it soon.
Any ideas for a guy who has no clue what he is doing?

 

[heymccall]

Gauge readings are needed.
On one of my 4 TB180FR machines, the damned desiccant bag in the drier ruptured, causing a similar condition. Little desiccant balls plugged the expansion valve.

 

[Don.S]

It was 11c out. First is starting with machine off. The second was with the machine running and did not change at all. the third is five minutes after shutting the machine off.

 

[Old Doug]

Is it low on freon ? Is there a expanstion valve in the line? Here the ac season is about over. One less thing for drivers to bitch about.

 

[Don.S]

In the trucks or anything that moves at speed i dont care about ac but since i get all the jobs that you want the cab closed up for even in this temperature its very hot inside. Also the ac helps like crazy to defog when its cold and wet.
I would have thought that with the low side going that low the ac clutch would kick out?

 

[uffex]

Good day Don
I cannot help so much but I must compliment you on your thread nice illustrations.
Kind regards
Uffex

 

[heymccall]

Yeah, low on freon. What is 11°C in normal numbers ?

 

[Don.S]

That is normal numbers. I think you are asking for freedom units? About 52F

 

[Don.S]

What is the best way to look for a leak? The problem around here is any time we get a Ac guy to look at something they say ya it was low and now it works. When you ask where the leak is they say i dont know. Here we cant buy 134a over the counter so it makes working on ac a little more difficult.