Re: Maintenance questions
Reply #15 –
OK - now we can see the "root" of the problem. And, of course, it is one of the "unobtainable" parts. Murphy's Law in action.
I would not try to tighten the leaking fitting - it probably would crack the plastic. I also don't believe simply connecting the two air lines together will work. You must have some means of controlling the air flow into and out of those two air lines. That is the function of the two solenoids.
Looking at the photo of that part (below) and the fact that it simply bolts to the electronic module makes me think there might be a solution. I think that white plastic piece that connects the two air lines to the two solenoids MIGHT be a rather simple manifold. Air comes in one end (controlled by the supply solenoid) and goes out the other end. "Manifold" pressure is released (when necessary) by the exhaust solenoid.
If it was me, I would disconnect the air lines and wiring connectors and remove the whole solenoid assembly from the electronic module. Then I would carefully take it apart and see what the white plastic piece looks like inside.
If it is very simple inside then a good machine shop might be able to reproduce the function of the plastic piece by milling a simple reproduction manifold out of a small block of billet aluminum.
If the plastic piece is too complicated inside to easily reproduce, then you could try to carefully reinstall the brass fittings in the ends with some good quality thread sealing paste and hopefully seal up the air leak.
You need to get creative to solve this problem, because the alternative is trashing the whole Bendix cruise system and installing something else.
Topic: 1990 U280 fuel pump and bendix cruise control issues (Read 1974 times)
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