Hi William
Because of the number of ball joints in the series steering a small amount of wear adds up to be a problem.Good news is they are reasonable priced,best to bite the bullet and replace them all first up,get the greasable type should last longer.Note some are LH thread,any good parts person should know this.
Next check,you can adjust the preload on the steering box,ONLY A SMALL AMOUNT AS IT CAN DAMAGE THE BEARINGS INSIDE.Also fill it with Penrite semi fluid grease as the EP90 will have leaked out along time ago and will no longer hold the EP90 oil,very common fault.
Next is the steering relay in the front Xmember,you can top up the EP90 with a syringe removing a maximum of 2 small bolts in the lid,DONT UNDO TO FIX AS THERE IS A HUGE SPRING PRESSURE INSIDE AND IT NEEDS TO BE DISMANTLED IN A PRESS!!!!.Easy to get a new one,readily available.
Last fix is the railko bushes in the swivels,jack the wheel up and check for play,easy enough job,you should use a manual for guidance.
Goodluck
Andrew


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