Installing A/C Pics and Questions

[hutch]

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The 1st. pic. That coiled wire? Do I just unwind it? The evaporator only has those two connections. Is that it?

The install is going well.

Hutch

[geezer101]

O.k. That coiled wire is the thermal sensor - feed it into the cooler core in the cabin and tuck the end of it into the fins (closer to the centre of it the better). Depending on where you put the remote thermostat control, whatever isn't inside the A/C case will need to be covered in an insulated sleeve to protect it and prevent any heat from outside of the cooler case from messing with the temp signal. Try to keep the route between the thermostat control and the cooler case as short as possible. If it looks like you have miles of it I think it will be o.k. to keep some of it coiled up in the casing but maybe put a layer of sponge foam anywhere around where the thermostat wire may come in contact with another surface. This will safeguard the wire from getting damaged from constant vibration and movement.

[hutch]

Thank you for the detailed information.

More pics to come.

[hutch]

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[hutch]

The 1st. pic. Guys, does anyone have those fittings? I actually need the larger size one.
Thanks.

[pennyman1]

Couple things - the hoses should be crimped to the fittings, not hose clamps on the high side especially. If you have to use hose clamps, get the fuel injection ones to prevent the hose from damage. You also should use the new style Teflon lined hose so that you can run 134A. The thermostat control gets spliced into the compressor clutch wire to turn the compressor on and off. You might also change out the drier for one that works with 134A. I have a couple of those style compressors laying around - I will see about getting that fitting off of one for you - it will probably have a hose on it, but I am not sure.

[hutch]

All the clamps came with the system. Are you saying those hoses will not work with 134a?
It's not heater hose. I had to use a hacksaw to cut it to length. It is incredibly thick.

[geezer101]

Holy shite - that is a massive compressor. I'm gathering it is a piston type. Same with the cooler unit in the cab. It is overkill for a small cabin but there's nothing like having really cold A/C. If it's designed the same way as my Air International unit, it will only work on the recycling air vent control. After pulling mine apart and replacing all the case seals and cleaning out the dirt and dog hair (:rolleyes:) I figured out how the whole thing worked. I think if you set the vent controls to fresh with the A/C on, the core would ice up. Are you going to attempt to gas it yourself? I've seen DIY regas kits and they are quite cheap. I am considering trying one out if there aren't any regulations against it being freighted to Oz, but if anyone has tried out a kit I'd be interested in the what's and how's of using one.

[hutch]

Thanks for all the info guys. It is much appreciated.

[claych]

& With respects,
I would not worry about the clamps, as the kit is equipped with
these..
http://www.autopartsdb.net/assets/images/ProductImg/g/g9810_3909030.jpg
Those little hook tab looks simple enough, but if installed correctly (& I am sure they were ;),
On new (NOS) hoses & barbs, unless ' High Side' pressures exceed 275 PSI with '134 ( UNLIKELY ),
Scratch the 'clamp/blowing line issue' off the worry list.
---Caveat's---
1) Cooling system Upgrade, ... at the VERY least a fan shroud...
2) High pressure 'clutch cutout' switch , did not see one in the kit?

More to follow as Your install progresses

[claych]

.......

[geezer101]

What kind of thermo fan came with the kit for the A/C? The old style 4 blade units aren't terribly efficient and they're bulky.

[hutch]

No fan but I did just purchase the old style you speak of for $45.00. Can you recommend any?

Here are some more pics of the dash pot and switch. Hooked everything up and everything works great. Except I had to wire like it had
for 1.6. Everything was there in the wiring harness that came with it. The switch is now touching the wiper motor body, I guess for a ground.

1570315704

[geezer101]

Use any slimline front mounted fan - bigger the better. You should be able to use an 11 or 12" fan. They're designed to work in both push and pull and they're pretty cheap. Something like this will be perfect - http://www.ebay.com/itm/2X-UNIVERSAL-SLIM-12-HIGH-PERFORMANCE-RADIATOR-COOLING-FAN-MOUNTING-KIT-BLUE/170860663352?_trksid=p2047675.c100010.m2109&_trkparms=aid%3D333008%26algo%3DRIC.MBE%26ao%3D1%2 6asc%3D35426%26meid%3D485b3fda8cb94980892b253f334f 9430%26pid%3D100010%26rk%3D3%26rkt%3D11%26sd%3D400 423612998

2 for $40? - bargain! You can eliminate the factory pump driven fan and free up some engine bay space. Lots of advantages to using them - and these ones are pretty lol

[hutch]

Question: Does this kit come with a high pressure switch? This one did not. If so, which one can I use and where would I splice it in?

Thanks,

[pennyman1]

Actually it would be a low pressure switch for the original system to prevent damage running the compressor without refrigerant. It would be located on the output fitting on the high side of the compressor. You can also get an inline switch that is both low and high pressure cutoff to prevent high pressure damage. You may also want to change out the expansion valve on the evaporator under the dash for one sized to R134A - the orifices are different sizes for R12 and R134a and will affect how the A/C cools.

[hutch]

Actually it would be a low pressure switch for the original system to prevent damage running the compressor without refrigerant. It would be located on the output fitting on the high side of the compressor. You can also get an inline switch that is both low and high pressure cutoff to prevent high pressure damage. You may also want to change out the expansion valve on the evaporator under the dash for one sized to R134A - the orifices are different sizes for R12 and R134a and will affect how the A/C cools.

Thanks for the info. Very helpful.

[hutch]

BTW. What fan shroud(s) would work on a 1st. gen? Anyone out there have one for sale? :)

[camoit]

Get one for a early Montero. There mettle and should bolt on.

[hutch]

I picked up an electric fan. Please see photo. I'm not going to use the water temp control but want to wire it to the compressor. When the clutch engages it switches on the fan. Which wire where?15776

[geezer101]

I think you would need the fan to be constantly powered once you turn the A/C on. The compressor clutch is controlled separately to regulate the system. Running it from a water temp sender wouldn't make sense as the fan is trying to discharge heat from the A/C system not the engine.

[hutch]

I think you would need the fan to be constantly powered once you turn the A/C on. The compressor clutch is controlled separately to regulate the system. Running it from a water temp sender wouldn't make sense as the fan is trying to discharge heat from the A/C system not the engine.

Well, when the clutch engages on the compressor, the air conditioning is operating. Pin 85 or 86 will need to be spliced to that wire but which one? I only want the fan running when the A/C is on.

[geezer101]

Ground the wire running from pin 85 and locate power coming out of the A/C on switch. Run a wire from that point to pin 86 and you should be ready to go.

[claych]

^^^
Agreed, that would be the simplest hook up.

[hutch]

Roger. Thank you guys.

[yamahlr]

I have a/c in my Power Ram 50 and run a Flex-A-Lite Model 30 electric fan which comes with it's own shroud. They utilize a tap into the power wire (hot wire) to the compressor which activatse the fan whenever the a/c is on. This is a universal fit fan. I ordered it by dimensions of the radiator and clearance to the pulleys etc... Fits well, cools the truck very well.

[hutch]

Fan installed. Everything working as intended. I'll take it to a A/C shop sometime this week with an update. 1578815789

[geezer101]

Nice :thumbup:

[hutch]

The shop calls me today saying the A/C is ready and working excellent. I pick it up tomorrow. I will update.

[hutch]

A/C works. It works great. The pic shows the high-side C/O switch.
Everything is factory, except the high pressure switch. Running 134a. 15957

[hutch]

Installing another 7 inch fan. Pics to come. I'm not even using the A/C at the moment. I'm also heli-coiling some components.

[hutch]

16014

[hutch]

So, currently heli-coiling the tensioner.

More too come.16035

[hutch]

Also decided to knurl the part that comes into contact with the bracket. With the heli-coil it really holds a torque.
The knurling also improved the grip.

Well, that's it. Everything is working. I have cold A/C. Ready for the summer.

Thank you to everyone for the help and advice.

16086

[hutch]

The thermostat actually works. Wrapped the wire with black tape all the way to almost the tip. Left about 1/4" exposed. The tip was positioned in the middle of the evaporator. Thank you again to a forum member mentioning all this cause I would have never new anything about that.

Blows nice and cold and shuts off when the cab reaches whatever temp. I set the thermostat.

[BradMph]

Awesome stuff. Glad everything is rolling along for you. Does the AC rob alot of power from the truck or drop idle down much?
Also, are you installing a radiator shroud? I think it is almost mandatory with an AC unit.

[hutch]

Awesome stuff. Glad everything is rolling along for you. Does the AC rob alot of power from the truck or drop idle down much?
Also, are you installing a radiator shroud? I think it is almost mandatory with an AC unit.

Thank you.

First for the shroud. Still no luck in finding one.
For the drop in idle. I installed the dashpot on the carb. and the associated harness and switch. You can see it on the 1st. page in this thread. Simple adjustment, so no drop in idle.
Power: I really have not noticed.
Stuck in traffic on 80 degree day the temp gauge is solid. No deviation.
Let's what happens on a 95 day.

[pennyman1]

With twin pusher fans you don't need the fan shroud. With the 2.6 you will not notice a drop in power with the A/C - I never did with the same setup on Geronimo.

[hutch]

Roger.

[McDodgers]

great progress. nice work