[cumapart]

The qsx15 Cummins in John Deere’s biggest quad track tractor pulling the Deere 76 foot conservapac air drill and 550 bushel air cart used for seeding crops, the seeding tool goes 4 inches in ground to put fertilizer down, let me tell you, your running 2100 rpm in the hills and the load factor is close to 100 percent nearly all the time, the big ole Cummins can lug at those higher rpms