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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You may have to be in 2nd or 4th gear before it will actually '******' your speed.
You have to have zero fuel flow.....foot off accelerator pedal and downshift tranny.
You should be able to hear it restrict the exhaust flow when it engages (closes) causing back pressure on engine
IF it doesn't engage....then it may be binding/frozen from lack of use. Exhaust soot can build up on internals and not allow movement.
You have to have zero fuel flow.....foot off accelerator pedal and downshift tranny.
You should be able to hear it restrict the exhaust flow when it engages (closes) causing back pressure on engine
IF it doesn't engage....then it may be binding/frozen from lack of use. Exhaust soot can build up on internals and not allow movement.
