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Topic: Air leak  (Read 420 times) previous topic - next topic

Air leak

How do I tighten these fittings?  Two are leaking where the black line goes into the fitting.
2019 IH45
    2014 IH45
        2003 U320

Re: Air leak

Reply #1 –
A picture will help. Or a better description, there are to many fittings to speculate.
Dub McBride 1996 270

Re: Air leak

Reply #2 –
You don't. They are push on fitting.  You can either call Foretravel, nearest O'REILLY, Truck place, or Napa. If you give me the hose size, pipe size and if straight or ? I can give you both press on and compression fitting  Gates part numbers.

To remove the hose, take a small wrench, press down on outer ring and hose, while still pushing down on ring, pull on hose and it will come out of the fitting.

Welcome to the wack a mole, air leak fun 
2014 ih45  (4th Foretravel owned)
 1997 36' U295 Sold in 2020, owned for 19 years
  U240 36' Sold to insurance company after melting in garage fire
    33' Foretravel on Dodge Chassis  Sold very long time ago

Re: Air leak

Reply #3 –
You can also order the fittings from Amazon, possibly cheaper. They have a lot of no name brands, but I have ordered Utah Pneumatic and Mytee products. They both seem to be quality products and reputable companies.
Dave and Kathy Bennett
2004 U270
Build #6253
1600W Solar
700 AH Battle Born Lithium
2015 Jeep Wrangler

No matter what happens, remember you always get the trip out of it.

Re: Air leak

Reply #4 –

Push connect fittings work fine, as long as the tubing is installed correctly.  Correct installation requires a clean, undamaged tubing end which is cut off squarely.  The tubing must be pushed straight into the connector until it bottoms out, then pulled back slightly to lock the teeth.  Once the tubing is locked in place, be sure there is no lateral (sideways) strain on the tubing.

To repair a leaking fitting, pull the tubing out.  Inspect the tubing end to see if it is damaged or distorted.  If damaged, cut off a short (one inch) piece with a proper tubing cutter to "refresh" the tubing end.  Then wet the tubing end (a little spit works great) and push it straight into the fitting.  If there is any lateral strain on the tubing where it exits the fitting, re-route the tubing to remove the strain.

Amazon.com: PTFE Teflon tube cutter, cut up to 3/4'' OD tube- Allen tech :...

See the video below for a good primer on push connect fittings.  The video is talking about liquid lines, but the basic principles are the same for air line connections.

https://www.youtube.com/watch?v=sdkmNL3R8YQ

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1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Air leak

Reply #5 –
Quote from: turbojack –
You don't. They are push on fitting.  You can either call Foretravel, nearest O'REILLY, Truck place, or Napa. If you give me the hose size, pipe size and if straight or ? I can give you both press on and compression fitting  Gates part numbers.

To remove the hose, take a small wrench, press down on outer ring and hose, while still pushing down on ring, pull on hose and it will come out of the fitting.

Welcome to the wack a mole, air leak fun 

Can you give me the compression parts number from Gates?
2019 IH45
    2014 IH45
        2003 U320

Re: Air leak

Reply #6 –
Quote from: ldlrunyon –
Can you give me the compression parts number from Gates?

Part # depends on type of fitting and hose and hose/pipe sizes.

Here is a little table that I have started has both Compression and push on. I prefer to use the Compression but when in a pinch I will use the push on.

Size to dash #   
1/8"  - 02
1/4"  - 04
3/8"  - 06
1/2"  - 08
2014 ih45  (4th Foretravel owned)
 1997 36' U295 Sold in 2020, owned for 19 years
  U240 36' Sold to insurance company after melting in garage fire
    33' Foretravel on Dodge Chassis  Sold very long time ago