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Old 06-21-2013, 06:18 PM
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Detroit Diesel 6V/92 Series

Hi guys, I don't post much here, but I thought some of you would know about the Detroit 2 strokes. My Father just bought a 82 single axle dumptruck. (Ford L9000) It has this 92 Series 6V Detroit with a 9 speed transmission... I want to earn all I can about the truck as I will probably drive it more than He does.

He bought it to pull His 310 JD Backhoe. He also bought a 15ton Talbot trailer for it. Got the truck and trailer for $9,100, both in GREAT condition. Anyway I have a couple questions...

-What is a safe RPM to run at in High Gear? (55mph is screaming at 1500rpm, 60mph gets to 1800rpm) is that all I can do safely?

-These motors use oil... Is there a "fix" for this?

- Any special maintance or things I should know about common issues?

-Does anyone re-gear the rearend for Highway driving?

I don't mind going slower but I also don't know whats normal for these motors? What are they capable of? It seems like a pretty powerful truck so far... Supposedly the motor was refurbished 40k ago. Truck has 400k+ with no rust. Dumpbox was new in 2000! The truck was a tractor before converted to the Dumptruck.



Thanks Guys!
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Old 06-21-2013, 06:22 PM
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I'm not an expert by any means, but I'd say 60 is about the fastest you can go, and with a load, that's about the fastest you'll want to go in a 30 year old dump truck. How much oil is it using? IMHO, if you want to go faster than 60 while towing a load, you should've gotten something newer.


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Old 06-21-2013, 06:37 PM
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I'm not saying the speed is my issue... I just want to run the motor at a safe RPM. I don't know what they are capable of. Like a 4cyl. boat motor can run at a steady RPM and even though it's near 4000 it will last just fine. Is the Detroit made to run steady at a high rpm?

Speed is definately not my concern... Also, the oil usage isnt even noticable, but Ive just heard that Detroits use oil. So if it's that common someone must have thought of a "fix"... So I'm just asking questions to learn.
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Old 06-21-2013, 06:58 PM
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detroit 2 strokes use oil.. and always will any 2 stroke will use "some" oil just by sheer design a 2 stroke removes 2 cycles of the revolution process us four strokes are used to hence the blowby and oil consumption...
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