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Old 09-01-2013, 09:07 PM   #1
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Join Date: Sep 2013
Location: Toccoa, GA
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Engine brake stopped working. '03 Discovery

2003 Discovery with 330 Cat and Allison transmission. Picked up the coach from storage (6 weeks) and the engine brake is not working. The indicator lights up on the instrument panel like normal even though it is not working. Any ideas of what to check?
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Old 09-02-2013, 04:40 PM   #2
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Join Date: Jul 2007
Location: Kansas city, MO
Posts: 203
Mine stopped working and I found the air hose into the PAC Brake had melted through due to the placement of the hose next to the engine exhaust. Found it by engine access from under the bed. I have the same engine. Part was only $32 bucks I believe. My light was working too.
Dave T.
2004 MERDIAN 36G Freightliner & CAT C7 330
Retired LEO
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Old 09-03-2013, 08:25 AM   #3
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Winnebago Owners Club
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Location: New York
Posts: 469
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I discovered that a wire had pulled out of the back of the engage and disengage switch on the dash. The transmission did down shift but the exhaust brake did not close. I removed the instrument dash back and found one wire that had slightly pulled out of the switch. I pushed the wire back in and all is well.

In my investigation I lubricated the exhaust bake valve and air cylinder with the high temperature silicone oil.

Safe travels and THE JOY IS IN THE RIDE
2004 Meridian, 2019 Jeep Cherokee Trailhawk, Blue Ox, Airforce one
FMCA 403779
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Old 09-08-2013, 08:31 AM   #4
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Join Date: Oct 2002
Location: Big D, Texas, ya\'ll
Posts: 273
I also lost my engine brake coming from Branson Missouri to Dallas, looking down from the top of the engine I saw a hose that had slipped off. Put it back on and everything worked fine. I have a friend with a 37 foot Tradewinds his was stuck open and they charged him about $1000 to repair it. As he said he could have done it a lots cheaper himself.
Oh, the love of owning a black hole !!!! Happy him and him and
Larry & Norma, Dallas, Texas
2001 39 ft. National Tradewinds LTC
2003 Suzuki GV ] PressurePro TPMS
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