John Deere 4020 Troubleshooting

I’m seeking some expert guidance regarding my 1968 4020 diesel tractor. It’s been experiencing excessive slobbering from the exhaust stack and down the engine block. Recently, I replaced both the…

I own a 1966 John Deere 4020 Powershift with plenty of hours on it, but it’s been fairly well maintained. It shifts into reverse without any trouble, but switching to…

I have an early diesel 4020 that has always had trouble cranking over. Over time, I've gone through a couple of Delco starters. The tractor has been converted to 12…

I have a 1966 John Deere 4020, and I’m experiencing an issue with the steering. It turns fine to the left, but turning right is very difficult. You have to…

Hi! I was mowing with my tractor when it started losing RPMs gradually. Eventually, it idled down and then stalled completely. I replaced and bled the fuel system, but it…

The hydraulic pump on my 1966 John Deere 4020 (early model) is making a loud, screaming noise. I’ve lost steering, brakes, and the ability to lift. What steps should I…