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Classic Truck Discussion Forum


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Phil H

07-03-2016 15:08:30

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Anyone know where I can get a jake brake for a 6-71 Detroit?

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07-21-2016 20:02:49

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 Re: JAKE BRAKE in reply to Phil H, 07-03-2016 15:08:30  
The nearest truck wrecker should be a good place to start. If they don"t have anything they can probably refer you to a place that will have them.

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Phil H

07-22-2016 05:42:25

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 Re: JAKE BRAKE in reply to Nordic, 07-21-2016 20:02:49  
Hi Nordic, I have done that, but it seems the 6-71 is not a very popular candidate for the jake brake. They started using the brake on the 8v-71 and the 6v-71 and even the 8v-92 are interchange able. Some of the people who have converted the old greyhound buses with the 6-71 have found a few jake brakes. There is a spacer that goes between the valve cover and the head that is REALY hard to find. So I can find some jake brakes from the 8v or 6v engines but the valve cover spacers are nearly impossible to find. That's why I went to the Classic Truck forum to see if someone could help. Not only did the jake brake help slow you down decending a hill, but it made shifting A LOT FASTER so you didn't loose speed climbing a steep grade. When you are splitting gears, and shifting the slow 16 speed spicers, the jake brake was a big help. Thanks for your comment.....Phil

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07-23-2016 22:23:16

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 Re: JAKE BRAKE in reply to Phil H, 07-22-2016 05:42:25  
It sounds like you're fixed up and using Jakes already now on your 6-71... I think i have seen the spacer you're talking about. You may want to check into different production years of engines because I believe a number of years the Detroits came with tall enough valve covers to accommodate the Jake brakes. On all Detroits with Jakes that I have owned no spacer was ever needed. I was surprised that nobody had responded to your post sooner...I just started looking at this topic myself as I have been on the farm tractor topics for a long time. If you post under "Crawlers" on this site there is a lot more traffic and you're likely to hear from some Detroit specialists.

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Phil H

08-15-2016 06:21:59

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 Re: JAKE BRAKE in reply to Nordic, 07-23-2016 22:23:16  
Thanks, sorry I didn't respond sooner. I had just about given up. I will look at the crawler forum and see if that will help. Phil.

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