| [GMCnet] Ford A426C Vacuum Pump Issues [message #328957] |
Thu, 08 February 2018 16:14  |
powwerjon
Messages: 849
Registered: March 2013
Karma:
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Senior Member |
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Larry,
It looks that you have mounted the pump in a location that allow the water
and road spray to drip onto the vacuum pump from the top of the door seam.
when I installed the vacuum pump in our first using a GM pump that everyone
was using at the time (no longer available) I put it in the location that
everyone was using at the time. I noticed after the first trip that water
had dripping on the pump. I put a drip shield over the pump to protect it
from it getting wet in the future and that pump was still working without
issue in 2011 (11 years) when we sold the coach.
First vacuum pump I used in 2000:
http://www.gmcmhphotos.com/photos/vacuum-pump-vacuum-switch/p1606.html
http://www.gmcmhphotos.com/photos/vacuum-pump-vacuum-switch/p1605.html
http://www.gmcmhphotos.com/photos/vacuum-pump-vacuum-switch/p1604.html
When we bought the stretch coach in 2011 it did not have a additional
vacuum pump other than a additional small vacuum tank. The Ford pump was
mounted (in 2013) as far back in the cavity as I could. It is an area that
stays dry and the picture is little misleading as it sits up high and
doesn’t get wet, While we are in Tucson the coach is in storage here in
the RV park and I will walk over and see if I can get any additional shots
that show the small vacuum tank and pump layout.
Ford A426C pump installed in the Buskirk stretch:
http://www.gmcmhphotos.com/photos/general-pictures/p59295-dl-brake-layout.html
Water has always been a problem as it comes off the windshield and leaks
into the compartment thru the door seam. A lot of GMC’ers have installed
water drip shields to direct the water away from the vacuum pump, master
cylinder and other under the cover items.
J.R. Wright
GMC GreatLakerTech Editor
78 Buskirk 30' Stretch
75 Avion Under Reconstruction
Michigan (On Location in Tucson)
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