We have recently bought a 2006 Tigercat 625c skidder and are having some issues. If anyone has some advice, ideas would be greatly appreciated. It has a 5.9 Cummins in it and bogs down a lot, under powered. Highest Engine torque is 75% and turbo boost 19 psi. Is this normal for this engine? Also the fan is sucking in air through the rad, shouldn’t it be the other way? It gets really hot in under the hood also where the pre cleaner is....I’m thinking it shouldn’t be sucking in this hot air into the motor? I see on later Tigercat models the pre cleaner is up out side the hood, should we do this with ours too? Or turn the fan around? Another thing that has popped up is the reverse is weak, you turn up the speed dial and it’s like it’s slipping/ bypassing or something... any help for where to start with that would be great. Thanks.