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2000 mack RD688 trailer brake question

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I have the Mack truck in subject line. It only has a tractor brake inside cab. I purchased a 30,000 lb dozer and I was wondering if I could add trailer air brakes and tow this dozer. Would need a tag trailer rated for 40,000 lbs. Before I even waste time thinking about it was going ask some of you more knowledgeable guys if this was even a possibility.  

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I just did about the Samething as you 

I purchased a excavator 


but I got my gladhand kit from anything trucks 

haven't Installed it yet but seem to be everything I need 

bunch of good videos on YouTube


I just need to figure out the trailer wiring now before the gladhands 


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