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Old 08-15-2007, 07:05 AM   #1
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All of the vents in the dashboard stopped working the other day. The system is electropneumatic and has a handful of small pneumatic tubes from the dashboard control to the valves, etc.
After sweating bullets that one of these tiny lines might have a minute hole and how was I going to find it, I decided to look at the big stuff first.
With the key on (engine not running) there are two electric motors running: the fan on the "firewall" under the inside dash and an airpump mounted on left corner outside of the "firewall". The airpump has about a 1/2 inch black rubber hose running to what I assume is a small accumulator, about the size of a softball, mounted next to the pump. This hose had fallen out of the accumulator leaving the system without suction.
The attachment point on the accumulator is a hole with what looks like the end of a barbed fitting visible. However, when I put the hose back on the fitting, it won't stay put. It easily comes off again - which leads to my question:
Is there some adhesive/sealant that I could use to secure the hose without mucking up the suction?
Thanks in advance.
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Old 08-15-2007, 07:05 AM   #2
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All of the vents in the dashboard stopped working the other day. The system is electropneumatic and has a handful of small pneumatic tubes from the dashboard control to the valves, etc.
After sweating bullets that one of these tiny lines might have a minute hole and how was I going to find it, I decided to look at the big stuff first.
With the key on (engine not running) there are two electric motors running: the fan on the "firewall" under the inside dash and an airpump mounted on left corner outside of the "firewall". The airpump has about a 1/2 inch black rubber hose running to what I assume is a small accumulator, about the size of a softball, mounted next to the pump. This hose had fallen out of the accumulator leaving the system without suction.
The attachment point on the accumulator is a hole with what looks like the end of a barbed fitting visible. However, when I put the hose back on the fitting, it won't stay put. It easily comes off again - which leads to my question:
Is there some adhesive/sealant that I could use to secure the hose without mucking up the suction?
Thanks in advance.
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Old 08-15-2007, 05:34 PM   #3
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Might try a small hose/tubing clamp or a wire tie rather than any kind of adhesive.
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Old 08-15-2007, 06:03 PM   #4
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Zip ties! Never travel without them! A million uses for pennies! Dan
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Old 08-16-2007, 07:00 AM   #5
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The ties would be a good idea except that the nipple of the barb is recessed on a hole and there is no way to get a tie in there.The only thing I can think of is a little adhesive or sealant to give it some grip.
Thanks for the ideas.
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Old 08-16-2007, 09:34 AM   #6
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You might want to take a look at Loctite. In addition to thread locking materials, they make products to do what you want to do, holding and sealing press-fit items in place. It has been years since I worked with it, so I don't remember the product number.
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Old 08-16-2007, 02:07 PM   #7
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You might try a small amount of silicon from a tube which should do the trick and it will also help keep it sealed and allow you to remove it at a later date.
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Old 08-16-2007, 08:23 PM   #8
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One thing you might check first, see if the end of the tubing is enlarged. If it is and there is enough extra hose cut off about a 1/2 inch and then reattach. In many cases this gets a new and good pice of the tubing connected to the barbed fitting and takes care of the problem.
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Old 08-20-2007, 03:18 AM   #9
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I would use Goop, a silcone sealant. It works for plumbing repairs, roof leaks, etc. If used on the OUTSIDE of the tubing where the male piece attaches to the female piece, and carefully spread around the perimeter, it should provide a good, strong seal. Do not get it on the male piece prior to insertion as it might clog the tube and block the suction entirely. There are other silicone products available and they work as a pretty good adhesive and an excellent waterproof seal.
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