Couple comments - the comparable Kubota to the Challenger is the M7. M7 with CVT weight, per Tractor Data, is about 1,000 pounds heavier. I have a M7 and like your Challenger, suspended front axle, double suspended cab, a whole different animal vs the M135GX I traded in. Also 50 km/hr top end, the European speed limit for tractors although my gps reads 35 mph/58 km/hr.
One suggestion for fuel filters - do not use substitute filters. I have a stack of C6.6 injectors in my souvenir display. Our pre-production machines in customer hands did fine, sold to customers who quickly failed injectors. They serviced the machines, purchased as used from dealers, and replaced fuel filters with what an auto parts store said was interchange. We worked with filter manufacturer to develop a media that would filter fine enough to protect injectors at the higher injection pressures. I have one set that tested fine after 2,000 hours of validation testing, then sold to a customer and failed injectors in 30 hours. What did you do? Well, went to parts store and bought what they said would fit because Cat wanted too much. I okayed dealer replacing, telling customer okay, this time I’ll cover, but there is a reason the book says use only Cat filter. We have no control over what others will sell, nor do we give our proprietary info to them.
