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Question: How does the Mack engine brake work
Posted to HD/Fleet Forum on 9/12/2009 17 Replies

I have read numerous websites that tell me how the "jake' works.

Open the the intake and exhaust valves at the same time removes the compression stroke from the deceleration!

Mack states that they're Powerleash is better than all the others!

I don't know... Login to read more.

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