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Old 02-06-2008, 08:48 AM
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Pressing hoses onto A/C barbed fittings?

Anybody got the secret to getting A/C hoses fully pressed onto barbed fittings (crimp type)? I thought of using a bit of silicon but held off fearing it might contaminate the system. Clues?

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Old 02-06-2008, 09:19 AM
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Okay, I'm sneaking my wife's hair drying out of the house to see if a little heat will do the trick. Will report back shortly if I'm not caught...and dead.
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Old 02-06-2008, 09:28 AM
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I use the refrigerant oil to lube the barbs, seems to help them slide on better...
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Old 02-06-2008, 09:43 AM
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I do the same as 66chevystepside..

A little refrigerant oil works wonders and helps the seal too.

Look in the little hole in the end of the ferrule, you should see the hose. That tells you it is inserted all the way.

Heat from a hair dryer won't do much..

Mikey
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Old 02-06-2008, 09:57 AM
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Hmmmm, refrigerant oil. Not something on my shelf...so it looks like a trip to town.

And NOW...does anyone have the secret to getting the partially installed hose back off so I can get some oil on it?

Just to double check here, I assume the hose and ferrule need to be pressed all the way on the fitting to the "collar" noted at the arrow. Correct? And as Mikey says, you need to be able to see the hose in the peep hole?



&%$^#* air conditioning.
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Old 02-06-2008, 10:01 AM
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Yes, you should have it inserted up to the collar... you will probably have to force it back off and then use the oil when you reassemble.
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Old 02-06-2008, 10:29 AM
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You usually get a small clear bottle of refrigerant oil (about 1/4 oz), in your AC kit..it is the same stuff that you lube the fitting O-rings with upon assembly...

I put those fittings in a vise with some wood or teflon vise blocks...then I can lay some lard, (mikey weighs about 265 ),on the hose to work it on.

Later, mikey
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Old 02-06-2008, 10:42 AM
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When I use to do a lot of A/C work I used the clamp from my flaring tool set and a little A/C oil, this will mark the fitting so wrap it with tape or something . [ I wasn't worried about marking the fittings ] As far as getting that line off a razor Knife would be a good choice ,they are not ment to come off .
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Old 02-06-2008, 11:02 AM
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This is what Vintage Air supplies. When I first mocked mine up, I used some 1/2 heater hose along with some smaller stuff I got from Lowes. The regular heater hose is standard 5/8 - and no big deal. To cut the A/C and heater hose, I used an inexpensive garden pruning cutter. Like Mikey said, you need some beef, but you should only assemble it once as pulling it apart will tend to tear up the inner liner.

Dave W





I used masking tape and a Sharpie to mark the final fitting placement in the hose - which can just be seen. You can't twist this stuff at all

The final run was 'cleaned' up from this photo
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Old 02-06-2008, 11:28 AM
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The new barrier hose is a real pain with barbed fittings. We gave in and bought a 134 crimper, it so much better.
Dave Tallant Hot Rods KC Mo
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Old 02-06-2008, 11:34 AM
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Hey Dave, how much you charging these days for one of your cool custom air cleaners...and can I get same day delivery????



I did get one of those little tubes of oil with my kit...no explanation of what it was so I figured it was some sort of thread sealer. Ooooof. Already ran to town and bought a quart of A/C oil.

Looks like I'll have to slice off the hoses I already have partially on...could be a potential problem. I had cut the hoses to optimum length so I wouldn't have any "slack". Now I might be in trouble. Ooooof again.

I sure hope any rookies putting together an A/C kit read this thread first. They could learn a LOT from my mistakes.

@#$%^& air conditioning.
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Old 02-06-2008, 12:31 PM
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Quote:
Originally Posted by cboy
Hey Dave, how much you charging these days for one of your cool custom air cleaners...and can I get same day delivery????

@#$%^& air conditioning.
I have several of those air cleaners just sitting ready to ship!! Next day is the best I can do - sorry The 'polished' valve covers are specials as well.

A few more pointers - at least for the 'A' builders (or, most likely, any other small body car)

1 - Putting the A/C into a Model A for sure is a challange - particularly if it has an OEM style firewall. A flat Bi@#$in or Direct would make it much easier - my lesson learned - buy a Brookville body and have them omit the firewall.

2 - SBF 5/8' bypass hoses make good right angle turns under the dash for the heater connections

3 - The dryer can be mounted on the car frame instead of the firewall. I had a very nice polished aluminum unit - the inlet and outlet needed to be reversed - the unit I had wouldn't allow that to be done.

4 - If you think you have enough fittings in your "kit" and pointing the right direction. You are probably wrong. I have probably enough extras to almost completely do another car. If any one is interested, I can make you a deal PM me and I'll put a list together and figure out a reasonable well below my cost price (plus shipping).

5 - An in-line firewall fitting will work better. My 4 square piece is the biggest reason for so many extra fittings. I think it looks better, but it sure cost a bunch in time and more parts.

6- Don't waste your money on a defrost option if you are using a very small unit. Also, some cars just do not have enough under dash room for 2 more 3" hoses along with the 3 already there for A/C and heat. I didn't but have talked with other that have and found out that they were SOL.

There are probably more 'gotchas' but probably wont remember them until the car goes back together

Later,
Dave W
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Old 02-06-2008, 06:03 PM
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Quote:
Originally Posted by wildman1932
The new barrier hose is a real pain with barbed fittings.
NOW you tell me. LOL

I finally got everything together this afternoon but what a job. Four hoses, eight fittings, and every one of them was a real PITA. I just don't have Mikey's "girth" to do the persuading for me. But the oil trick did help as well as putting the hoses in a vice so I could put a bit more power to them. Fortunately, even after cutting off the fittings I had already tried to start I still had just enough hose length to make the connections. No slack left now, however.
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Old 02-06-2008, 06:32 PM
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Quote:
Originally Posted by Irelands child
A few more pointers - at least for the 'A' builders (or, most likely, any other small body car)
Dave you should really consider expanding on this a bit and doing a WIKI article. If you put the basics together along with your great tips then others could chime in here and there to fill out the article once you post it. A good "how-to" could have saved me time, money, and a whole lot of swearing.

Quote:
Originally Posted by Irelands child
1 - Putting the A/C into a Model A for sure is a challange - particularly if it has an OEM style firewall.
I used another alternative...bringing the hoses up through the floorboard rather in through the firewall. But then I mounted my compressor below the alternator rather than above it so it was much more natural to keep my hoses down that low.

Quote:
Originally Posted by Irelands child
3 - The dryer can be mounted on the car frame instead of the firewall.
It can also be mounted inside, under the dash if you have any room. I didn't, so I mounted mine to the frame (actually to the motor mount). And it's relatively inconspicuous...at least a lot better than cluttering up the firewall.

Quote:
Originally Posted by Irelands child
4 - If you think you have enough fittings in your "kit" and pointing the right direction. You are probably wrong.
Amen to that. I suppose if you have unlimited space and you don't particularly care how the hoses and routing are going to look, then the kit fittings might work. I ended up having to order up three additional fittings to get things the way I wanted them. (I actually ordered six fittings to be on the safe side and used three of them.)

Quote:
Originally Posted by Irelands child
6- Don't waste your money on a defrost option if you are using a very small unit.
I'll differ with you on this last item. But mostly because of where I live. Even during the summer we have some pretty crisp morning temperatures here in Wisconsin and I often have to leave for car shows VERY early...like 4 or 5 am. So I use the defrosters on my '32 pickup a LOT...and I'd be in trouble without them.
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