80-series retrofit A/C on poverty pack

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Joined
Aug 12, 2022
Threads
3
Messages
7
Location
Sweden
Dear fellow 80-series entusiast,

As my nickname gossip I’m from Sweden. The 80 series was never sold new here so they are a rare sight. I want to retrofit an a/c system to mine and I’ve read a lot of post about suggestions to take a a/c unit from a wrecked car and mount in my own. Unfortunately that is not an option since there aren’t any scraped cars here at all. However, euro4x4 parts seems to have some parts. Are there any experts here that knows if I need something more, very essential parts, that are not seen on the picture bellow? The ”gasket and seal” department is for a conversion to r134-gas and under ”miscellaneous” you’ll find the A/C button for the panel.

I realise it will be expensive and there are no piping available for example, but a good a/c mechanic would be able to make those pipes if I mount all the other stuff? One question is the cabin evaporator, are there like a ”housing” for that in a 1991 poverty pack or is that a part that I need to source? And how about the condense water, do I need to drain that or there are drainage orginal? And how about the electric’s? Is the A/c button just a on/off switch for the coupling on the compressor it would’nt be a problem?

Big thanks in advance if someone pick this up and help me! :)

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Did your truck come with AC when new or was AC never installed? If there once was AC installed then adding it back in will be straightforward. I overhauled the AC on my '96 last year with new everything (evaporater, condenser, drier, compressor, TXV etc.) I also replaced most of the lines. I was able to get everything new from Toyota except the long one that runs along the firewall.
If your truck never had AC then it will likely be way more complicated. I have never worked on the '91 so some of my assumtions may be wrong. The evaporator sits in a housing that is used to connect the fan to the main input for the air vents. The housing is waterproof so it can handle the condensation and has a drain pipe that goes through a hole in the floor. The housing also has the AC amplifier and a few other control units. I believe the amplifier sends a signal to the ECU to increase idle speed when the compressor kicks in. I have no idea if your ECU would have that function or if the harness already exists in truck.
There are a few functions (pressure switch, ECT cut off function etc.) that need to be taken into consideration. Not a job for the faint hearted.
 
I believe the amplifier sends a signal to the ECU to increase idle speed when the compressor kicks in.
Yes and more importantly it is responsible for setting the duty cycle of the compressor to prevent the evaporator from freezing, and also to shut off the compressor in the event that you loose to much pressure in your lines
 
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