Currently working on a 32 foot pusher, with a 5.9 liter Cummins, for a lady. I haven't dug into the HP rating but, I drove it the other week, and in my opinion it's under powered. If you wanted to tow something I'd say it would be severely under powered.
On flat ground it took forever to get up to highway speed, even at 45. Once to speed it had no problem keeping it there on flat ground, but having driven larger and/or heavier vehicles, I can tell you for a fact it would have serious issues in hilly country, and especially in mountainous terrain.
Not to mention, pumping 300 HP out of a 5.9 is a good way to shorten it's effective life span. That's the very reason Dad and I looked at everything but Freightliners when looking for a cab and chassis for my service truck. Everything we heard about them related to the 5.9 Cummins and the problems they were having with them. Thankfully we found one with a Series 50 8.7 liter, Detroit as I love the truck's handling.
That's not to say the 5.9 is a bad engine, and it would be great in a smaller vehicle, but in a larger box, it's just not enough.
As far as the 3116, and 3126 CAT engines, I'd offer up the same advice on either of them. They are fine engines for lighter weight vehicles, but they wouldn't be enough for anything with any size.
Dad has a 3116 in his service truck, and it weights in around 19000 lbs. It's slow off the line, even on flat ground, but it's fine once up to speed. In the mountains, you'd be better off to get out and walk if your in a hurry to get to the top.
The really bad thing about either of the CAT engines, even the pre-electronic versions, is it takes over $3000 worth of special tooling to work on the top end (think changing injectors). As a result, your choices on mechanics for top end issues is going to be somewhat limited. Not necessarily a deal breaker, but definitely something to keep in mind.
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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