A/C delete options
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From: Los Angeles - South Bay
A/C delete options
I am having hard time finding a ac bypass pulley for my 1989 f250 7.5l engine. I have found many bypass pulleys but none say are compatible with that motor.
The motor is for a swap and will not be using air conditioning. Can I just install the pump back on so that i can use the standard belts and plug the ports behind the AC pump? Will it eventually seize?
The motor is for a swap and will not be using air conditioning. Can I just install the pump back on so that i can use the standard belts and plug the ports behind the AC pump? Will it eventually seize?
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From: Pasquotank, NC
You can use the pump as an idler pulley. Don't need to hook up the lines or plug them. The compressor has a clutch on it. If the clutch is not energized (ac turned on), then the pump isn't turning. Pump could be locked up solid, as long as the clutch is working right then no big deal.
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From: Pasquotank, NC
Not if the clutch is disengaged. Look at a vehicle that has working AC. Run the car, turn the AC on, watch the pulley. The center section will be rotating. Now shut the AC off and the center of the pulley stops rotating. Pump isn’t turning.
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Oh I see thanks. So I'm guessing it would be safe to drain the oil that is in it? I wouldn't want to make a mess if for what ever reason in begins to spill out the pump while 4wheelin.
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From: Pasquotank, NC
Which compressor do you have? The York or the other one? If unsure, you can google the York. It is a very distinctive compressor. If it is the York, then it has a closed oiling system like the engine. If it is the other one, then it is lubricated by the freon. If it's the York, then it is really easy to convert it to an air compressor for onboard air. Great for airing back up at the end of the trail. Even if it's the other one, there are ways to use it also, just a little more work.
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It's not a York. I really would have liked to do on board air but looks like everything I searched for was using the York style. It did however cross my mind. Would be nice to have.
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From: Pasquotank, NC
You can do onboard air with the compressor you have. The compressor you have uses the oil in the refrigerant to lube the compressor. What you want to do is put an oiler w/ an air filter on it (for use with air piping system feeding air tools) on the suction side of the pump. Then put an oil separator on the discharge side of the pump. Then plumb the discharge to an air tank. It's fairly common on the 84-01 Cherokees. Search Google for "XJ Onboard Air" and it will come up with a couple good installs showing it. Not too bad of an install. Might cost a couple dollars in parts, unless you have them laying around. The best bet is to find an old pancake compressor on CL with a bad compressor pump and use that for your onboard air setup. That will give you the tank, pressure switch (can use it to control the compressor cycling on/off to maintain pressure in tank), relief valve, regulator valve, and quick disconnect hose fitting. Only thing you would need then is the fittings to mate to your compressor, oiler, oil separator, some tubing, and a bit of wiring.
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Thanks for the info. I will look up the jeep setup and maybe I'll go that route. Sounds like a good project to add to my list. I assuming it can be done with no tank right? Like if I were to just hook up an air hose straight to compressor to air up tires.
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From: Gilbert, PA
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From: Pasquotank, NC
For on the on board air setup you need an air tank. Doesn't need to be huge, but you need one. You will need to install a pressure switch. The pressure switch will turn the pump on/off at set pressures. Something like pump on at 80 psi and off at 120 psi. The tank gives the pressure switch a volume of air to sample. Also gives the compressor time to turn off and stay off for a bit before being turned back off (pump off while pressure is bled down to 80 psi).
There is another option that you may be able to get by without an air tank. An unloader valve. Unloader valve will serve the same function to maintain a set pressure on the outlet side of the compressor. Rather than shut the compressor off when pressure is reached, the unloader valve will vent the extra air to atmosphere until pressure drops and then it will stop venting to pressurize the line again. Would be less strain on the pump as it would continue to run rather than cycling on and off.
With either setup though, it is best to have an air tank to stabilize the system.
There is another option that you may be able to get by without an air tank. An unloader valve. Unloader valve will serve the same function to maintain a set pressure on the outlet side of the compressor. Rather than shut the compressor off when pressure is reached, the unloader valve will vent the extra air to atmosphere until pressure drops and then it will stop venting to pressurize the line again. Would be less strain on the pump as it would continue to run rather than cycling on and off.
With either setup though, it is best to have an air tank to stabilize the system.
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You must of looked real hard
https://www.google.com/search?client...UTF-8&oe=UTF-8
https://www.google.com/search?client...UTF-8&oe=UTF-8
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If I can get away without the tank I would rather go that route. Although I really would like that idea. Either way this will be on my to do list. My current compressor works like you described with that unloader valve and I have no issues with it. So I might hold off a bit until I get this truck back up and running.
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From: Gilbert, PA
Twist the belt for what or what chevy one?
Did do even look at the link? They were a for 1989 Ford 7.5l a/c bypass pulley
This one?
https://www.summitracing.com/search/...terial/plastic
or this one?
https://www.dormanproducts.com/p-19727-34150.aspx
or this one?
https://www.rockauto.com/en/catalog/ford,1989,e-350,7.5l+460cid+v8,1117202,heat+&+air+conditioning ,a/c+compressor+bypass+pulley,10329
or maybe this one?
Thses were the 4 first things that popped up under the google search......AC delete pull 89 7.5 So dont give my any crap that it is for a chevy or that you need to twist your belt.
YOU are just lazy and didn't bother to look