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Ford A426C vacuum pump issues [message #328935] Wed, 07 February 2018 21:40 Go to previous message
Larry is currently offline  Larry   United States
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma:
Senior Member
Several years ago I purchased a Ford Azure vacuum pump and installed it under the drivers side hatch on my coach. As you all know it is used in conjunction with the vacuum booster to provide braking vacuum in the event that the engine should quit. The pump has worked flawlessly until several weeks ago when it stopped pumping. It just blew 20 amp fuses. I took the thing off and disassembled it. I found the crankshaft inside corroded badly enough to seize the shaft so that the motor could not turn the crank. I soaked the crank with Kroil for about an hour and twisted it with a channel lock and eventually broke it loose. I was surprised at how much corrosion I found inside of the pump.

Does anyone know where the pump was located on the Ford Azure? Considering the amount of corrosion inside the pump, I think that locating it under the hatch (as many of us have done) is no longer advisable. It needs to be located in a place that is less exposed to the elements. Any suggestions?

If your pump is located under the hatch as in this picture

http://www.gmcmhphotos.com/photos/emergency-vacuum-pump-for-power-brakes/p55693-img-10802.html

I would advise pulling the filter off of the front of the pump and check to see if any corrosion has taken place. The filter housing is located opposite the electric motor in this picture.

http://www.gmcmhphotos.com/photos/emergency-vacuum-pump-for-power-brakes/p55680-img-10841.html

here:

http://www.gmcmhphotos.com/photos/emergency-vacuum-pump-for-power-brakes/p64527-img-12381.html

and here

http://www.gmcmhphotos.com/photos/emergency-vacuum-pump-for-power-brakes/p64526-img-12371.html

I'd hate to see this thing lock up on you all when you need it most.

Just what I'd do.

Larry Smile
78 Royale w/500 Caddy
Menomonie, WI.

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