Engine difference on the tier 3 30 series tractors.

[EMB5530]

I was curious on what changed on the 5530 6030 and 6530 to get the different hp ratings as the engines are all the same? I was also curious as to the width and length differences as these tractors can be picked up for fair prices. I've had my 5530 since 2012 bought it brand new and other than having to change the timing on the injection pump its been great. I've since found a Bradco 11HD backhoe and have added more remotes to the rear and front so it's setup pretty well for what I do and with the industrial tires its as wide as I can fit on my 14000lbs trailer. I guess the curiosity is there because when its time to do anything major IE clutch or motor work. It would be worth looking into 10 more HP if the chassis is up to the task.

Thanks to anyone with knowledge that can help me with this information.

 

[EMB5530]

I was hoping one of the many diesel experts on here could chime in and easily explain this away. IE: they have this pump on this series with these injectors timed this way. As far as the HP goes but then I can only speculate on what I have no clue on.