|
One other important aspect that is covered by the rather specific adjustment process for these units is the runout on the steering worm gear. If those bearings are loose, the worm does not fully actuate the hydraulic valve. When the oil gets warm, the PARTIALLY OPERATED valve condition gets worse. Take notice some time while operating it to see if it steers hard one way if pulling back on the steering wheel but steers easier (maybe not easy but easier) THAT SAME WAY if pushing the steering wheel forward! Sounds dumb but when the steering worm bearings are loose, you can note a significant difference in steering effort when pulling versus pushing on the steering wheel. That is..... it will steer easy one way when pulling back, hard the other. When pushing forward, still hard one way and easy the other BUT THE EASY & HARD DIRECTIONS SWITCH PUSHING VERSUS PULLING! Every reply is right on this matter. At the very least, some TLC is needed. Best to start with an oil change unless it's already known to be good JD PS oil. After that adjust the operating valve (behind the pipe plug) and the runout on the shaft then warm it up & center the valve, adjust the flow, check the pressure and it may work acceptably. All that pretty much needs to be done to check the flow rate past the vane seals anyway. Even a small leak like where the suction line connects to the pump can let a small amount of air in. The oil gets a bit foamy & less effective. Hope these replies help.
| 
