Superchief
New Member
Our township grader, a John Deere 670CH with 7400 hours on it has a problem (not new) that is causing us problems. When making a final pass on the roadbed, using a blade with carbide bits on the cutting edge, (just trying to "rake" the windrow in the middle of the road to put the aggregate back onto the driving lanes, very light blade loads) using 5th gear, running around 9 MPH, I get a serious wheel hop out of the rear tandems on both sides of the machine, so severe that you almost have to come to a complete stop to eliminate the hopping. This is not "wheel bounce", but "hopping up and down". We have had the blade tightened up to eliminate any "slop", it seemed to help some. Have adjusted air pressure, running from soft tires, to hard tires, different pressures in diagonal tandems, but nothing seems to solve the problem. Have been wondering if putting heavy shocks on the tandems would solve it, or maybe air shocks with an electric compressor so you could adjust the pressure on the bladders? Looking at other threads, I see that we are not the only ones with a problem like this... Help !!!