Originally Posted by 47chevy6400
how do you adjust the clutch brake?

It is adjusted when you adjust the clutch, usually by turning an adjustment on the clutch its self.
This manual may help: http://www.roadranger.com/ecm/idcplg?IdcService=GET_FILE&dID=165924

I don't know all the details, as my pull type clutch is self adjusting, and I have not messed with a manual adjust one.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-