Question for CAT 3406 Guru/Mechanic

On the same tag that you got the power rating from there will be a Serial Number and being a 95 475hp it will be starting with 5EK. The displacement of them is 14.6L. Not much difference between the 3406E models, first is 5EK then 6TS and 1LW. 5EK and 6TS are pretty well identical where the 1LW has a stronger block and couple other small differences

 

That would be an E model... the first with electronic controls.

The A's and B's had Bosch pumps and smaller crank main journals among other differences. The C model was a mechanical/electronic hybrid....

Give the serial number to a CAT store and they can tell you about all the work that any CAT dealer has performed on that engine since it was new.

 

It is a 3406E model engine. They never made a mechanical 475HP engine. Displacement is 855 CU IN. same as the old mechanical's, only it is now electronic. The serial number will start with 5EK.

 

The 3406E had a displacement of 14.6 liters, which is actually 893 cubic inches, not 855. The old NTC Cummins was however 855 cubic inches...This information is direct from my Caterpillar engine manual for the 3406E, dated August 1993.

 

NEVS, RGR you are correct, I spent ten years building CATS and for some reason the 855 popped out.

 

No problem, I wasn't flaming you. It's easy for me to get confused by the liters to cubic inch deal......

 

True, Probably because I spent 8 years tearing down Cummins and then did the CAT thing and have never turned back

 

As stated earlier. The engine has to have a serial number prefix of 5EK and be a 3406E 14.6L. This is the first of the electronic CATs. It is also very easy to hop this engine up with a good file in the ECM. It had to have been sold as a 1750 peak torque 475 with the 18 speed transmission installed behind it. Eaton only provided the 18 speed with the torque to handle 1750 or higher torque ratings back in 95, the transmission should be a RTLO18718B