Tractor test: John Deere 6830 Premium AutoQuad Plus It’s now almost 18 months since John Deere upgraded its previous mainstream tractor line, the mid-sized 6020 series, into the current offering, the imaginatively tagged 6030 range. Though looking decidedly similar to what came before, there are some significant differences – including the impressive ‘Intelligent Power Management’ system. We test an AutoQuad Plus gearbox version of the 99kW/ 135hp (rated output ECE R24) 6830 Premium model