Big improvement when they went to the 600/601 series and made the rear end a good bit heavier and also improved the hyds with the piston pump over the vane pump. Ya some of the early 600s had the vane pump also and do not remember just when they switch to the piston pump but it was a big improvement when they did. Was not uncommon to have the rear axle brake on the Jubilee/NAA
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Today's Featured Article - Recollections of a John Deere GP - by Charlie Cook. I grew up on my dad's 280 acre general farm in Western Michigan. Dad's only tractor when I was very young was the old GP. My first recollection of this tractor was when dad allowed my brother and myself to ride on the tractor with him driving. One of us would sit on the left fender (away from the clutch) and other would sit on the gas tank and hold onto the crankcase breather pipe.
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