JD 4020

   / JD 4020 #1  

toplink

New member
Joined
May 15, 2012
Messages
23
Location
Mocksville, NC
Tractor
John Deere 2030, 6320, 720D, 455, 322
Getting ready to look over a purchase on a 4020 syncro shift. Anybody have a short list of "look out for this" items?
 
   / JD 4020 #2  
Wear on clutch/brake pedals & hole in drawbar indicate amount of use. Speed hour meters(tachometer) have been known to quit and been changed out.Condition of oils & coolant very important. I'd use a test kit especially for coolant. Check operation of trans,hyd system & brakes.
 
   / JD 4020 #3  
One of the most common problems with the old syncro ranges is the shifter itself. I suggest that you check the shifter quadrant closely for the amount of wear/play within the gates. Shift it through all the gears and make sure it will go and stay in ever gear.

The shift pattern should be fairly smooth (you shouldn't have to look for the gears) and the shift lever should be fairly tight when in gear (no flopping around). If you have problems getting it in gear or it staying in a gear, I would be cautious as this could be anything from a simple lever adjustment, worn gates or a broken synchronizer in the trans.

Is it a new or old style?
 
   / JD 4020
  • Thread Starter
#4  
Old style, 70's model, and I was wrong about the tranny. It's a power shift tractor. From the owner, problems are: Small amount of blow by, 1 remote leaks, 1 battery box rusted, valve cover gasket leaks. Runs great, shifts tight, strong lift, good pto, sheet metal great. This is all from the seller's point of view. Headed up to check it out tomorrow, more to follow.

toplink
 
   / JD 4020 #5  
Powershift tractors are very durable(hard to tear up) but are very expensive to repair. You need to check trans through all 8 forward & 4 reverse gears. FYI older 4020's were built from '64-'68 and later models(side console) from '69-'72.
 
   / JD 4020
  • Thread Starter
#6  
Thanks TXJIM,

decided to pass on the 4020, as it was a little worse than expected. Most of it's issues were minor except for the blow by, which wasn't so bad as to need an overhaul immediately, but it would eventually. Main reason was he wouldn't come off the price enough to make me comfortable with the repairs needed.

toplink
 

Tractor & Equipment Auctions

2016 John Deere 35G Mini Excavator (A49461)
2016 John Deere...
2015 KUBOTA 1140CPX RTV (A51406)
2015 KUBOTA...
2008 Ford F-450 4x4 Tow Service Truck (A49461)
2008 Ford F-450...
2018 John Deere 524K-II Articulated Wheel Loader (A50322)
2018 John Deere...
2023 Case IH 4412F 12 Row 30 In. Row Spacing Folding Corn Head (A50657)
2023 Case IH 4412F...
2018 JLG 3246ES 32ft Electric Scissor Lift (A50322)
2018 JLG 3246ES...
 
Top