Air Brake system
We have a 2009 Fleetwood Discovery 39r we are having trouble with our air brake system. We have all the manuals but there is nothing in any the manuals showing where the air brakes are located. I have...
Forum Discussion
ScottG wrote:moisheh wrote:
There are diesel vehicles with hydraulic brakes and a VACUUM pump.
I thought that huge full moon was the other day. Maybe the OP is pulling our legs.
Moisheh
ALL diesel LT's have hydraulic brakes. None of them use vacuum.
Many of them have vacuum pumps but they have nothing to do with the brakes.
Without getting this thread too far sidetracked (after all, it is about air brake systems, not hydraulic systems) I gotta ask, what do you think the vacuum pump is for if its not for the brakes????? Did 'ja ever notice that big old round Bendix vacuum brake booster on all of those diesel light trucks? Something has gotta operate them. Yes, some do use a hydraulic driven booster (the Duramax had a vacuum pump but it was eventually eliminated in favor of a different boost system) My '06 Sprinter chassis for my View MH has a vacuum pump connected directly to the Bendix booster. Lots of trucks do.
Different manufacturers do use different thinking in designing their braking systems, but yes, if there is a vacuum pump, its there mostly to provide "power" for the brake booster, and possibly to provide vacuum for the enviromental system damper actuators (though most are electric nowdays).
Charles
