3126 Cat new to me

I've had a couple FL70's with this engine, and have always been good-until a driver ran it low on coolant in the summer here in Phx.

Cracked the head and the truck had about 350k on it, it was pretty well worn out, so we just sold it for parts.

 

What HP is it?

 

Mine was a 250hp with an Allison 6 spd-had a 26' box on the back, was a good little intown delivery truck.

 

IIRC thats the best, dont add HP as those engines like to grenade. I ran one up to 500k, the current owner is still running it, no major problems.

 

Had a 330hp version and in 280k it grenaded twice...both times because of a dropped valve.
After the second time I decided to check the valve spring tension and found that CAT uses VERY weak springs...
If I owned one again it would be getting valve springs replaced or shimmed for higher seat pressure.
BTW, the bottom rotating assembly is built like a brick S- house , it's way better designed than the cyl head.