The Cab's have also been changed. You can see many of the pieces have been changed to help achieve the higher level of pressurization and sound deadening that these machines have. The HVAC system is no longer mounted to the chassis underneath the operators feet, it is now attached directly to the cab and lifts up with the cab eliminating joints and seals. It also makes the machine easier to work on and you no longer
Discuss this in the forum topic New Cat "D" Series.