OBA Plans...input please!

[barlowrs]

OK, well it is time to work on my onboard system.
Essentially, it will be used for airing up tires, and eventually my Air Lockers. However, I would really like the ability to run some small air tools if necessary. This is my first air system, so please take a look at this and if I have anything wrong, let me know. This is the schematic I came up with:

Here are details on the components:

Compressor: I am looking at an AIM DC-7600. This is supposedly the same internals as a Puma, extremeair, etc, and all the research I have done seems to be a good setup for pretty cheap. A lot of street (mini) trucks swear by the DC-5000 and DC-7500, so I figure it will be good. Also, seems strong enough to be able to run tools if need be.
Specs:
Weight.......20lbs
Height........9"
Length.......12"
CFM...........4.0
HP..............3/4hp
AMPS.........24

Link: Click Here

Unloader: Link: Click Here

Water Separator: Link: Click Here

Check Valve: If I get the DC-7600 compressor, it comes with check Valve

Manifold: 7 port extreme outback. Link: Click Here

Gauge: Haven’t spec’ed this yet

Saftey/Blowoff Valve: 165 Blow off. Link: Click Here

Pressure Switch: If I get the DC-7600 compressor, it comes with pressure switch, I will simply relocate it to the manifold. I believe it is 100 on/150 off

In-Cab Switch: Probably going to make my own like I did with my lights

Tank: Looking at the Air-Zenith 5 Gallon. It is not too tall (8.5” with legs) so it wont hang too low, but 5 gallons should give me a nice supply before I have to tap into the compressor. Link: Click Here

Air Coupler: Haven’t spec’ed this out yet. Figure they should be easy to come by


If there is anything else I am missing, or forgetting, please chime in and school me. Also, if you think I am going about this all wrong, I would love to hear your opinions/input. All in all, this setup should cost me about $600.

 

[007]

You might be hitting the air lockers with too much psi if its set at 150

When I bought the arb compressor it came with a big wiring harness that included all the relays and lighted switches for the pump and both lockers. I would hate to have to duplicate that harness because I couldn't do it as cleanly.

The air compressor you are looking at would out perform the arb, its just not as easy to plug and play.

 

[barlowrs]

You might be hitting the air lockers with too much psi if its set at 150

When I bought the arb compressor it came with a big wiring harness that included all the relays and lighted switches for the pump and both lockers. I would hate to have to duplicate that harness because I couldn't do it as cleanly.

The air compressor you are looking at would out perform the arb, its just not as easy to plug and play.

True, I think the ARBs run at 90 psi, but I figure I can run a regulator off of one of the tank ports and run that into a separate manifold for the air lockers when that time comes. Do you think that will work?

 

[dms1]

I use 105 PSI for my lockers and also use this mechanical switch so I dont need to use any electronics.

 

[barlowrs]

What's the purpose of the Unloader?

You can go with a regulator for the ARB's or you can get a lower rated 85-105 pressure switch. 85-105 is the operating pressure range for the ARB's.

I fooled with a couple of different regulators with my similar setup (Viair 460 with 2.5 gal tank). I personally didn't feel comfortable with any of the regulators and went with the lower rated pressure switch. I do carry a regulator with me and have successfully used it to assist with brake bleeding (15-20psi).

I feel that the lower max pressure 105 (vs 145) will put less stress on the components. I can run an impact gun and/or pneumatic ratchet with my setup. pneumatic grinders - not so much..

I'd be interested in this unloader - I've never seen any reference to such an animal in any OBA writeups...

Rick

The unloader is one of the wildcards I was hoping people would chime in on. From all I have researched it serves to releasing the air pressure off the head of the compressor so electric motor can spin up more quickly and easily, which requires less amperage on start up and reduces wear on compressor. If it is not needed I would love to save the cash from it.

Also I thought about running a lower pressure switch, but even if I get an 85-105 switch, I would have to run a smaller blowoff, so I dont run the risk of having a pressure switch fauilure and overloading the lockers (expensive mistake). With the regulator, I planned on putting the smaller blowoff downstream, so even if the regulator fails, i still have protection for teh lockers, and I am still able to run the tank at a higher rating thus storing more air...does that make sense? Seem like a good idea?

 

[barlowrs]

I use 105 PSI for my lockers and also use this mechanical switch so I dont need to use any electronics.

Can you give me any info/specs on that swtich? Thanks

 

[bj70_guy]

For less money (and complexity) you could get the small ARB compressor for your locker(s) and a Puma for your air up/small air tool duties...

 

[dms1]

You can read more about them here. I bought mine back in 2000 from another shop that is no longer in business, but the ones I bought still work fine.

I purchased all the 5mm hose fittings i needed from McMaster Carr

 

[LandCruiserPhil]

OK, well it is time to work on my onboard system.
Essentially, it will be used for airing up tires, and eventually my Air Lockers. However, I would really like the ability to run some small air tools if necessary. This is my first air system, so please take a look at this and if I have anything wrong, let me know. This is the schematic I came up with:

Here are details on the components:

Compressor: I am looking at an AIM DC-7600. This is supposedly the same internals as a Puma, extremeair, etc, and all the research I have done seems to be a good setup for pretty cheap. A lot of street (mini) trucks swear by the DC-5000 and DC-7500, so I figure it will be good. Also, seems strong enough to be able to run tools if need be.
Specs:
Weight.......20lbs
Height........9"
Length.......12"
CFM...........4.0
HP..............3/4hp
AMPS.........24

Link: Click Here

Unloader: Link: Click Here

Water Separator: Link: Click Here

Check Valve: If I get the DC-7600 compressor, it comes with check Valve

Manifold: 7 port extreme outback. Link: Click Here

Gauge: Haven’t spec’ed this yet

Saftey/Blowoff Valve: 165 Blow off. Link: Click Here

Pressure Switch: If I get the DC-7600 compressor, it comes with pressure switch, I will simply relocate it to the manifold. I believe it is 100 on/150 off

In-Cab Switch: Probably going to make my own like I did with my lights

Tank: Looking at the Air-Zenith 5 Gallon. It is not too tall (8.5” with legs) so it wont hang too low, but 5 gallons should give me a nice supply before I have to tap into the compressor. Link: Click Here

Air Coupler: Haven’t spec’ed this out yet. Figure they should be easy to come by


If there is anything else I am missing, or forgetting, please chime in and school me. Also, if you think I am going about this all wrong, I would love to hear your opinions/input. All in all, this setup should cost me about $600.

Why not just spend ~$225.00 and get the Puma, save $375.00 and be done?

 

[barlowrs]

Why not just spend ~$225.00 and get the Puma, save $375.00 and be done?

The main problem is I am not sure what components actually come with the Puma (as I would want to seperate it and hard mount it). Also the compressor I am looking at is more powerful than the one that is on the Puma.

Do you know if the Puma compressor, coupled with a 5 gallon take would be able to run air tools if needed? If it has all the components needed, I would love to just buy that, seperate it, and plumb it up to a bigger 5 gallon tank (i could even use the 1.5 gallon tank as well), but I am not sure if it has everything I need to be able to do this.

 

[LandCruiserPhil]

The main problem is I am not sure what components actually come with the Puma (as I would want to seperate it and hard mount it). Also the compressor I am looking at is more powerful than the one that is on the Puma.

Do you know if the Puma compressor, coupled with a 5 gallon take would be able to run air tools if needed? If it has all the components needed, I would love to just buy that, seperate it, and plumb it up to a bigger 5 gallon tank (i could even use the 1.5 gallon tank as well), but I am not sure if it has everything I need to be able to do this.

Runs tools as is, enough to change a tire. What more do you need?

 

[barlowrs]

Runs tools as is, enough to change a tire. What more do you need?

Really? I didnt know that, everywhere I looked suggested 3/4 hp for tools, and the puma is 1/2.....hmm thanks for the information, that is definatly the easiest route.

Is there any downsides to this as opposed to other OBA systems (viair, etc)....I mean why dont you see more ppl doing this? I just dont want to make a mistake with those one.

Thanks again

 

[LandCruiserPhil]

Really? I didnt know that, everywhere I looked suggested 3/4 hp for tools, and the puma is 1/2.....hmm thanks for the information, that is definatly the easiest route.

Is there any downsides to this as opposed to other OBA systems (viair, etc)....I mean why dont you see more ppl doing this? I just dont want to make a mistake with those one.

Thanks again

Search, I know of serveral people running the Puma without issue. I have used it for a few years, no duty cycle has aired up 100's of tires and runs a 3/8" IR gun. Not a better value available IMO.

 

[bj70_guy]

Really? I didnt know that, everywhere I looked suggested 3/4 hp for tools, and the puma is 1/2.....hmm thanks for the information, that is definatly the easiest route.

Nope, the Puma is 3/4 hp running, 1 hp peak:

 

[barlowrs]

Nope, the Puma is 3/4 hp running, 1 hp peak:

WOW, ok I am sold. All the information I have found stated that the PD-1006 was the same as the AIM DC-5000 wich is 1/2 hp. unfortunatly the only place that I can find to buy teh Puma (buzzard-gulch) does not have a clear picture of the spec like that and it does not state it in the Ebay add. Thank you o much for clearing this up, I am definatly going this route! :wings: