Air

[D Chapman]

Anyone see a reason you cannot tap into the LR3 air tank to air up tires?

On the forward most part of the tank there is a cap. I'm not sure what size, but I'm betting it's pretty standard stuff.

If I ran a line from this point to where ever Tami wants the air quick dis-connect to attach an air-line to fill such items as tires, will this throw some funny fault?

Is it just a bad idea?

 

[stolenheron]

sounds like a good idea, i'd love to do it to my dad's 06 SE. let me know if it works out.

 

[gmookher]

that would be way cool

 

[ArmyRover]

honestly it may well throw a funny fault code but what the hell it can be reset

 

[jwest]

why not simply add another matching tank and compressor to the right underside--all the mount points are already there. then separate from the relatively important suspension air source. you could also pre-plan into the job a way to use the 2nd tank and/or compressor as a backup to the stock one,

mine has a matching stock tank and arb pump with line out above left rear access panel just inside the rear tailgate.
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of course you (DChapman) would know this if you'd really given some credit to what i came up with for mine rather than giving me lots of shit about what you didn't like on it last year.
i'd be glad to snap some close up photos if interested. the arb air switch. psi gauge, and 3 way battery switch are all behind the left access panel protected from gear but the air hose is just above for ease of use.

i will say if you're starting from skratch, figure out a way to get higher psi into the new tank as it doesn,t last long topping off my 31.5" tires and compressor has to come on again after 2 tires.

 

[D Chapman]

The ARB pump is too slow.

I don't know that the stock LR3 pump is any better, or faster, but it's already there. I have a spare ARB pump, though, I just do not think it's worth the hassle to install it, really.

A York pump could be cool. Not sure how to fit it, though.

If the stock LR3 pump, and the ARB pump are basically equal in CFM's, it not worth adding two pumps. At least, not to me.

Only valid reason for adding a second air pump would be to take some use off the LR3 pump. Then again, by having the hoses connected to the stock set-up, if the stock pump ever did take a shit, you could pressurize the stock tank from a CO2 tank or from another compressor...

I'm still wondering if the pump ran for an extended amount of time if this would create a fault.

 

[jwest]

driving on i70 so forgive typos:

if running suspension up n down, compressor keeps going - no fault right? whats the difference? you'd just have to wait for pump to catch up.

 

[gmookher]

why couldnt you or wouldnt you just wire up a rleay to run something like the Viair I use to run in conjunction with the LR pump? I think a dual pump solution adds redundancy, and takes the load off a single pump

 

[TheataSigma]

I would just add another pump in the back cargo area and skip playing with the stock AS system. There are plenty of cubby holes and places to mount such a pump. I also saw on a web site, not sure which one think disco3.co.uk, that someone had a power port installed in their grill so they could hook up a portible air pump.

TS

 

[jim-00-4.6]

Anyone see a reason you cannot tap into the LR3 air tank to air up tires?

On the forward most part of the tank there is a cap. I'm not sure what size, but I'm betting it's pretty standard stuff.

If I ran a line from this point to where ever Tami wants the air quick dis-connect to attach an air-line to fill such items as tires, will this throw some funny fault?

Is it just a bad idea?

My experience is with a P38.
I tapped the line going from the valve block to the tank, installed a T fitting, then connected to a pressure gauge & a quick disconnect airline fitting, under the hood.
You now have a 10-liter (-ish) tank at 150(-ish) psi when full.
I haven't tried to air up a bunch of 37" tires that way, but I have filled a tire after a repair.

The only downside would be the air dryer.
In the P38, air comes in, gets compressed, then runs through the dessicant (bottom to top of the dryer) to remove moisture.
When the system exhausts any air, it runs it back out through the dessicant in the other direction (top to bottom thru the dryer).
LR states this "regenerates" the dessicant, by taking the moisture back out, and then exhausting it through the silencer.

I don't use it that often, but it seems to be just fine for occasional use.
It's never thrown a fault from this.
The stock compressor has a duty cycle of something like 15%, so bear that in mind.

YMMV.

 

[nwoods]

Dan, it should work fine, but why do anything to run the compressor even more? I like JWest's idea of having a matching set on the passenger side. Personally, I think running a Viair 450 with a 2 gallon tank works really well and is fast. I can get my tank up to 75 psi in about 4 minutes.

The Viair fits easily in the spare battery compartment:

 

[D Chapman]

The Viair fits easily in the spare battery compartment:

She has plans for that space.

 

[atholmotorcar]

Anyone see a reason you cannot tap into the LR3 air tank to air up tires?

The pressure is monitored in the tank. It's not a switch like in the older trucks, the actual pressure is monitored. If the pressure changes when the valves are closed (no air required) the EAS shuts off, the warning lights come on, and a fault is stored. Static pressure something or other, it used to be very common before the compressor "campaigns" early on.

 

[D Chapman]

The pressure is monitored in the tank. It's not a switch like in the older trucks, the actual pressure is monitored. If the pressure changes when the valves are closed (no air required) the EAS shuts off, the warning lights come on, and a fault is stored. Static pressure something or other, it used to be very common before the compressor "campaigns" early on.

I think I understand what you're saying. Lets see.

You're saying that there is a pressure monitor of sorts in the tank. This pressure sensor, or monitor, has noting to do with the air compressor it's self. It's there to only monitor the pressure in the air tank.

That would mean there is more than one sensor in the tank, or somehow connected to the tank, right? How does the pump know when and when not to come on? Seems to me there has to be a pressure switch somewhere to tell the air compressor when to shut off and to come on.

I think you're saying that when the air bag system is inactive, and the air tank looses pressure, it creates a fault and it's stored in the ECU. That makes some sense to me, but also sounds complicated at the same time. I mean, in order for that to happen, the system was made way more complicated than it really needs to be.

The way I understand it, and again I'm no LR3 gooroo, is this.
-You have a compressor connected to a reserve tank
-The compressor will pump air into the reserve tank until XXXpsi is reached. Once that PSI is reached, the compressor turns off. Once the reserve tank falls below XXXPSI, the compressor comes back on.
-The tank feeds air to each of the 4 air bags.
-There is a minimum of two air lines running from the tank; one for the front air bags, and one for the rear.
-Each set of air lines, front and rear, must have a check valve of sorts to stop air from being pushed back into the reserve tank.
-There would also need to be two dump valves either on the front and rear air-lines, or on each air bag.
-Ride height sensors, mounted to the frame and to the suspension, monitor the amount of air sent to each set of air bags. These sensors talk to both the dump valves and the check valves to either raise or lower the vehicle

If this is truly the way the system works, and I'm not saying that this is the way it works, it would be wildly complicated for the lack of reserved air to create a fault.

......but that's why I'm asking.

Anyone have a diagram of the system?

 

[agbuckle98]

A buddy of mine just got a "new" '06 LR3 and we were trying to do just what you're asking about, and yes, it does shut down the EAS if you dump a bunch of air out of the tank when the computer is not expecting it. Kind of dumb, but I can understand why. The only reason a bunch of air would get dumped other than some jackass like me letting it all out would be a catastrophic failure in which the compressor would never be able to refill the tank any way. It will leave the bags filled at their current level, and only operate valves to keep the truck level while you drive it to the nearest shop to get the system reset. It seems anything you do to the air system that the computer does not expect will piss it off and shut it down.