rear airbag question

[drewdude92]

I get the whole how to mount the air bags on the rear end of a coil spring half ton. I just dont get what all else i need to operate the air bags. as of now im just gonna run lines to the bags that i can air up like you would air your tires up. how would that work? what all do i need

[MXmaniac]

I'll be doing the same thing so I made a list of everything I think I'll need. Someone please let me know if I forgot anything or have something wrong...

Airlift Dominator D2600 – ½” Port – 2 Reqd. - $59.99ea
- http://www.*****************/stuff-sa...ominator-d2600
90* Elbow w/ Swivel – ½” NPT to 3/8” line – 2 Reqd. - $5.46ea
- http://www.mcmaster.com/#5111k218/=4k5gp5
25ft DOT Air Line – 3/8” – Black – 1 Reqd. - $11.99ea
- http://www.*****************/node/1014
Schrader valve – ¼” NPT – 2 Reqd. - $2.34ea
- http://www.mcmaster.com/#8063k38/=4k5lmf
Adapter – 3/8” Line to female ¼” NPT – 2 Reqd. - $5.99ea
- http://www.mcmaster.com/#5111k673/=4k5nfp



Basically you want a 90* elbow coming out of the top of the bag. Then you want to run your airline from that elbow to wherever you want your schrader valve(same type as your tires), then you need an adapter from the line your using to female 1/4" NPT, then the Schrader valve will have male 1/4" NPT and will thread into that adapter.

Also you want both bags completely separate from eachother, meaning don't run the lines from both bags to a T fitting, then have one schrader valve that fills/empties both bags. The air will transfer between bags during corners and the truck won't handle well. So keep them as two separate systems.

[SCOTI]

For schrader filled bags, anything over .250" airline is moot..... it's not like you're going to be filling & dumping the bags on the fly.

90° fittings for the bags to .250" DOT airline to schrader valves located where you want them. I drilled holes in the license plate box & accessed them when I flipped up the plate (ECE flip up license plate kit). 2 separate lines to limit air transfer from side-to-side when cornering.

[MXmaniac]

3/8" line is the smallest I can use for my setup because the Dominator bags have a 1/2" port, so for a 1/2" NPT elbow the smallest line size is 3/8".

But I've got no idea what kind of bags the OP is using so he very well may be able to use the smaller line.

[PBFAB.COM]

Originally Posted by MXmaniac

3/8" line is the smallest I can use for my setup because the Dominator bags have a 1/2" port, so for a 1/2" NPT elbow the smallest line size is 3/8".

But I've got no idea what kind of bags the OP is using so he very well may be able to use the smaller line.

You may want to run a bushing reducer to take it from 1/2 NPT to a smaller bore. This will make the temporary schrader valve set-up easier to run.

[SCOTI]

Originally Posted by porterbuilt

You may want to run a bushing reducer to take it from 1/2 NPT to a smaller bore. This will make the temporary schrader valve set-up easier to run.

That's what I did . . ..... I'm trying Slams on my latest build which also have 1/2" ports. I'm using reducers to accomodate .250" airline fittings.

[oldblue1968chevy]

So is mxmainiacs list have everything needed to bag a 67-72 with trailing arms with manual air up/down?

[MXmaniac]

Originally Posted by oldblue1968chevy

So is mxmainiacs list have everything needed to bag a 67-72 with trailing arms with manual air up/down?

Yep, but I'm going to change the list some to incorporate the recommendation of the suspension gurus to use a reducer bushing so I can use 1/4" line.

I figured 3/8" line was overkill, but I don't know why using a reducer never crossed my mind!

EDIT:

Here's my updated list.

Airlift Dominator D2600 – ½” Port – 2 Reqd. - $59.99ea
- http://www.*****************/stuff-sa...ominator-d2600
Reducer bushing – ½”NPT to ¼” NPT – 2 Reqd. - $1.60ea
- http://www.mcmaster.com/#4429k422/=4kbrz4
90* Elbow – swivel – ¼” NPT to ¼” line – 2 Reqd. $6.25ea
- http://www.mcmaster.com/#5523k36/=4kbuox
25ft DOT Air line – ¼” - $5.99
- http://www.*****************/node/1001
Adapter – 1/4” Line to female ¼” NPT – 2 Reqd. - $4.43ea
- http://www.mcmaster.com/#5111k667/=4kbu02
Schrader valve – ¼” NPT – 2 Reqd. - $2.34ea
- http://www.mcmaster.com/#8063k38/=4k5lmf

[dznucks]

I found shcraders with 1/8" NPT threads at the local auto parts store.
Fastenal has 1/8"FNPT x 3/8" push loc tube fittings, part #450694. they will also have a 1/4"FNPT x 3/8" tube.

I am running the same set up that is described here temporarily until i can get the rest of the system in. I agree that the larger line is useless if you plan to always use schraders to fill/dump.

the one piece of experience that i have run into, but not seen it mentioned on here....if you use the push lock fittings, be sure to not let your air lines sway or flop around. they will slowly leak down as you hit bumps while driving.

[SCOTI]

Originally Posted by dznucks

I found shcraders with 1/8" NPT threads at the local auto parts store.
Fastenal has 1/8"FNPT x 3/8" push loc tube fittings, part #450694. they will also have a 1/4"FNPT x 3/8" tube.

I am running the same set up that is described here temporarily until i can get the rest of the system in. I agree that the larger line is useless if you plan to always use schraders to fill/dump.

the one piece of experience that i have run into, but not seen it mentioned on here....if you use the push lock fittings, be sure to not let your air lines sway or flop around. they will slowly leak down as you hit bumps while driving.

The DOT style PTC fittings have the internal steel liner (or barrel) that prevents this. I know Ride Tech fittings have this feature.