Hi Bruce,
This truck sounds like it may be the eqivalant of a yale MP20X If it is a stand on and ride powered pallet truck.
There should be fault codes showing in the BDI gauge.
and the truck power unit may be the Iskra type.
The fault you discribe sounds to me to be a faulty torque sensor or a broken pin locating the torque shaft to the large steer gear.
Regards Titus
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