How does the Jacobs Extarder work?
My m/h is a 1994 Allegro Bus, 5.9B 230 hp (mechanical engine) Cummins DP. It is equipped with a Jacobs Extarder. From what I understand, to stop confusion in what it's called, it is now just called ...
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busguy22 wrote:
If you don't feel and/or hear something when engaging it (and your foot is off the throttle) it isn't working properly. It wouldn't be uncommon on a vehicle of that age to have something seized inside the Jake brake mechanism.
I'd take it in to have someone look at it.
Is there something more to it other than the flapper closing off the exhaust. That seems to be working fine and why I was wondering if I'm supposed to be doing something like manually switching gears on my Allison World Tranny before turning it on or changing speed before activating it, etc.
