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Posted by Jerry in Idaho on Tuesday, February 24, 2009 at 00:28:08 :
In Reply to: Re: First Gen. Cummins Exhaust Brake posted by George (AB) on Monday, February 23, 2009 at 21:20:11 :
Interestingly, the literature says you need to replace the EXHAUST valves with 60# springs. This would allow greater resistance to the pressure you are trying to accumulate with the exhaust brake. They apparently have researched and tested and found it to be so. The later trucks all have 60# springs, from what I understand. JH
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