The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Suspension

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-07-2021, 04:33 PM   #1
G-NUT
Registered User
 
G-NUT's Avatar
 
Join Date: Apr 2014
Location: Baldwin County, Alabama
Posts: 162
suggested airline fittings when using aluminum hard line

Finished installation and for the 1st time, I powered up my Viair compressors and Accuair system. I have each compressor connected to a water trap. From each water trap is the Accuair supplied air line to an SMC bulkhead fitting in the floor. From each bulkhead fitting I have plumbed aluminum hard line to each SMC 90 degree swivel ptc fitting at the EndoVT.

As soon as the comps started filling the tank the bulkhead fitting and 90 degree fittings at the tank immediately began leaking, badly. I didn't get to check anything else out because the tank couldn't fill because of the leak.

The 90 degree fittings and the bulkhead fittings are leaking from the ptc side not at the swivel or threads.

I've installed quite a few air systems since 2002 and years ago I worked in industrial maintenance working on pneumatic equipment, so I am familiar with what I'm doing. BUT I've never used aluminum hard line. So I'm not sure if I did something wrong. When forming my hard line, with a bender, I inserted the aluminum hard line in and out of the connectors several times while trying to get my measurements correct. So I don't know if that is a no-no or not. Don't know if it's a 1-time use only deal or what. Don't know if that did something to the teeth.

Any thoughts?
__________________
'84 Suburban C10 Silverado - laying pinchweld to the ground on 22/24.
/Porterbuilt / Accuair / Bonspeed / Landsail / Auburn Gear / Richmond Gear / Moser / Raybestos / ProMaxx / Edlebrock / Street Demon / Taylor Wire / K&N / MSD / KillMat /

SOLD: 1985 GMC Sierra Classic 2500 3+3 Crew Cab Long Bed
G-NUT is offline   Reply With Quote
Old 05-10-2021, 07:46 PM   #2
PGSigns
Senior Member
 
PGSigns's Avatar
 
Join Date: Jan 2011
Location: Hayes Va
Posts: 4,569
Re: suggested airline fittings when using aluminum hard line

Never used the aluminum line with air. I would be concerned with corrosion. Also have never used it with push lock connectors. I usually use them with the dot plastic and just plug em in once. I have used aluminum many time for racecar fuel line and always flared it.
Jimmy
__________________
60 to 66 Chevy and GMC window decals
http://67-72chevytrucks.com/vboard/s...d.php?t=661131
Good friends, good food and a hotrod what else do you need?
1966 BBW long fleet Daily driver
1965 BBW short fleet Sold and going to a good home
1965 Suburban
2003 3500 Duramax
2005 Ultra Classic
PGSigns is offline   Reply With Quote
Old 05-11-2021, 05:17 PM   #3
G-NUT
Registered User
 
G-NUT's Avatar
 
Join Date: Apr 2014
Location: Baldwin County, Alabama
Posts: 162
Re: suggested airline fittings when using aluminum hard line

Thanks for the response. I've always used the DOT soft line for my air ride. Using the aluminum line is a first for me.
__________________
'84 Suburban C10 Silverado - laying pinchweld to the ground on 22/24.
/Porterbuilt / Accuair / Bonspeed / Landsail / Auburn Gear / Richmond Gear / Moser / Raybestos / ProMaxx / Edlebrock / Street Demon / Taylor Wire / K&N / MSD / KillMat /

SOLD: 1985 GMC Sierra Classic 2500 3+3 Crew Cab Long Bed
G-NUT is offline   Reply With Quote
Old 05-13-2021, 12:46 PM   #4
tinydb84
Registered User
 
tinydb84's Avatar
 
Join Date: Jul 2009
Location: San Jose Ca
Posts: 2,871
Re: suggested airline fittings when using aluminum hard line

I read somewhere that if you are trying to use softer line (like aluminum or nicopp) you need to use a tubing cutter to score the line where the teeth bite into it. I havent done it but the recommendation was to use regular line to get a mark and measure it to score the hardline.

I know there are special fittings for stainless hardline. Dont know if the can be used on aluminum though.
__________________
David
Used parts build: http://67-72chevytrucks.com/vboard/s...d.php?t=638991
My brother's Nova: http://www.67-72chevytrucks.com/vboa...d.php?t=727985
Rear suspension rework: http://www.67-72chevytrucks.com/vboa...d.php?t=750557
Instagram: myfabguy
tinydb84 is offline   Reply With Quote
Old 05-13-2021, 01:21 PM   #5
G-NUT
Registered User
 
G-NUT's Avatar
 
Join Date: Apr 2014
Location: Baldwin County, Alabama
Posts: 162
Re: suggested airline fittings when using aluminum hard line

Thanks for the response. I'll give it a shot. Can't be any worse.
__________________
'84 Suburban C10 Silverado - laying pinchweld to the ground on 22/24.
/Porterbuilt / Accuair / Bonspeed / Landsail / Auburn Gear / Richmond Gear / Moser / Raybestos / ProMaxx / Edlebrock / Street Demon / Taylor Wire / K&N / MSD / KillMat /

SOLD: 1985 GMC Sierra Classic 2500 3+3 Crew Cab Long Bed
G-NUT is offline   Reply With Quote
Old 05-13-2021, 05:52 PM   #6
kwmech
Senior Member
 
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,356
Re: suggested airline fittings when using aluminum hard line

I just use the DOT plastic line which is the same as the SEMI-TRUCK air brake line and the related fittings, way easier.
kwmech is offline   Reply With Quote
Old 05-23-2021, 12:57 AM   #7
Overdriven
Registered User
 
Join Date: Mar 2016
Location: Long Island NY
Posts: 598
Re: suggested airline fittings when using aluminum hard line

I’m curious how you made out with this? Normally, if the fitting is undamaged you can push and release the tubing, reinstall without any issues. If there were any burrs on the tubing though the oring could have been damaged. If you have any plastic line the correct size you can use it to check if the fittings are still good.
__________________
1967 C10 LWB 250 6cyl 3ott Panaramic cab “Layla”
1967 Camaro 327 ‘glide cruiser “Bailey”
Overdriven is offline   Reply With Quote
Reply

Bookmarks

Tags
accuair, airline, hard line, hardline, porterbuilt

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 02:10 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com