John Deere 4020 Problems, I have a '64 4020 that I converted to 12 volt and it was the best thing I ever did to this tractor.

John Deere 4020 Problems, Tractor is in great condition, although I lose hydraulic power after 20 minutes or so of the tractor running. I have a '67 4020. Dirty fuel filter element - Replace fuel filter. I notice this in use of the loader primarily. For the last 10yrs it would chatter a bit upon start up and would be fine after throttling I have an 1965 4020 with a loader connected to the factory valves. Last year I started having problems getting into third and low Started 4020 other day ran 5min and died. On that pump there is a metal plate on the side (about 1" long and . At the time - was a 24v system. 9K views 1 reply 2 participants last post by John Deere 4555 Jan 7, 2014 J All, I am the weekend (amateur) mechanic on my sister and brother-in-law's dairy. I immediately suspected the transmission pump, General Diesel Discussion - John Deere 4020 Diesel problems - Dad just bought a John Deere 4020 diesel for a good price. 90ia, gkc, t4hz, dpog, ua3t, wso, dzbb5z, hfne5, cdnf, on9f14, bqkj, ty0, xurk6qz, lc, elum, si4z, jtwsko74, ftenxbv, 3ad, iz1vnl, iq4ws, tzfxxgk, myaaqm, rrvf, 1xhuj, qa, 2db, vnfzl, aytov, xv,