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Tool Talk Discussion Forum

Air

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dsldr

04-02-2005 10:07:20




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Would like to install a compressor on a 1986 F-250. I would like to add an underhood compressor, but would consider a PTO driven unit. Has anyone seen any of either type unit around as a take off from someone else's truck, or can someone advise which units to stay away from? Also, where would I call to find a new unit? Thanks.




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OR-Ed

04-03-2005 12:50:32




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 Re: Air in reply to dsldr, 04-02-2005 10:07:20  
Depends on what you are using it for. That VMAC underhood rotary screw looks way cool, but unless you are running a jackhammer or doing mobile sandblasting... I've got a couple friends with old Fords (60s with 70s motors) that went the York route. At idle, they inflate air matresses and tires no problem. An air drill required either a low duty cycle or a someone on the throttle. If you want to get fancy, you could use a pilot valve and air solenoid to kick it up. If you have the room and can route the belt, it is a low cost DIY solution. Whatever you do, make sure there is a pressure relief valve on the system; even a small tank bursting can do more damage than you would think.

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NC wayne

04-02-2005 21:43:16




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 Re: Air in reply to dsldr, 04-02-2005 10:07:20  
There are several places makin both underhood as well as PTO driven units. I've got a Vanair Viper hydraulic driven compressor on my service truck. Its capable of 85 CFM at 150 Psi day in and day out. I don't know if their still using the same brand compressors or if they use the same brand of compressor for all of their different units but in the case of the Viper they assemble the unit around a Sullair compressor. Their web site is---- http://www.vanair.com/faqpage.asp?type=s ----- -While we were getting things set up for the truck and looking at options I also looked at VMAC
who make underhood units. From all the literature I looked at they seemed to have a quality setup also. Don't forget if you hook up a compressor either underhood or off a PTO you'll also need some kind of throttle control to either keep the engine RPM high enough to support the load all the time, or to raise the engine RPM when the compressor loads and then let it drop when it unloads. I don't know how to put in ore than one link at a time so you'll have to cut-n-paste the Vanair link, and here's a good one for VMAC. You can also do a search for underhood and PTO compressors and come up with alot more options. I will tell you that just about any of the systems are gonna be pricey but when you can simply bolt it on and not have to worry about custom brackets, custom wiring, getting the belt rerouted to catch everything, etc it's well worth the cost to be able to simply bolt it on. Good luck.

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thejdman01

04-02-2005 16:20:01




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 Re: Air in reply to dsldr, 04-02-2005 10:07:20  
easiest quickest way to do it would be an air conditioner compressor. you must be certain though that is is like a harrison a6 or such that it has its own oil crankcase. other air conditioners rely on oil in the refrigerant to lubricate the compressor. personally the neatest set up i have thought up and done is a briggs motor 2 air conditioning compressors on its own table/platform i pick up and throw into the pickup when i need air. saves from having the big motor running and wear and tear on your vehicles engine. your probably thinking well if the compressor and motor is on its own stand table i take in and out of the truck what about the tank. that is permanently mounted under the box out of the way. i feel pretty nifty the tank is under the bed out of the way un noticed. throw the compressor in the truck run a line from the 2 compressors i have ted off to the tank and then a hose from the tank to my airtool, air nozzle whatever. just takes 2 air hoses. the tank is mounted and hard lines running to the edge of the truck even t hough the tank is mounted inbetween the frame rails so you dont have to crawl under the truck to hook the hoses up and i keep the ends plugged so flying mud doesnt get in the air coupler.

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TomWNC

04-02-2005 22:05:41




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 Re: Air in reply to thejdman01, 04-02-2005 16:20:01  
What RPM does the compressor need to run at?



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kyhayman

04-02-2005 16:16:44




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 Re: Air in reply to dsldr, 04-02-2005 10:07:20  
I've done it several times with a York or Tecumseh a/c piston compressor and clutch pack, surplus air tank with relief valve, and a pressure switch off a regular air compressor with a bad motor (though a toggle switch is a lot easier).

The compressors are common, hundreds of automotive and ag applications (got a 7710 Ford, Canadian version with one and had a 2090 Case that had one factory). Bought a compressor and clutch pack new from an auto HVAC wholesaler for under $200.

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Jim K

04-02-2005 16:01:12




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 Re: Air in reply to dsldr, 04-02-2005 10:07:20  
Go to a good junk yard and get yourself an ac compressor from a "70"s Ford thier ideal for conversion to air compressors and they stay lubricated from oil in thier own crank case, and they come with thier own electric clutch.



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yes...John,PA

04-02-2005 11:00:20




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 Re: Air in reply to dsldr, 04-02-2005 10:07:20  
I see quite a few of the engine mount air compressors at truck repair shope where the compressors are removed from large 18-wheelers.

You might check around your area where they perform heavy maintenance on 18 wheeler trucks. You also will need a pop-off pressure valve assembly to turn off the compressor when the tank pressure is full enough. They are generally run with a magnetic clutch. Sorta like the air-conditioning compressor. HTH

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Weirsdale George

04-02-2005 13:49:25




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 Re: Air in reply to yes...John,PA, 04-02-2005 11:00:20  
I have seen air compressors designed with magnetic clutches for automotive use. I was sure it was Nothern Tool, but looked in the latest master catalog and couldn't find it.



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Tom in central Pa.

04-02-2005 14:44:29




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 Re: Air in reply to Weirsdale George, 04-02-2005 13:49:25  
check out www.currysupply.com They build/assemble service trucks



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dsldr

04-03-2005 12:31:50




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 Re: Air in reply to Tom in central Pa., 04-02-2005 14:44:29  
Thank you all for your replies, but I think I will be much happier with the "industrial" grade units that are PTO or other high capacity units. I do need CFM to run 3/4 and 1" drive guns at respectable duty cycle, and I have seen many fellows run the old york/tecumseh/a6 units for light to meium duty use with good results, but since I make my living 7 days a week with this truck, I'm not afraid to spend a buck or 2. As Wayne mentioned, for what my time is worth, I would be happy to find a complete bolt on unit with everything included. Again, Thanks everyone.

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