790 front diff pinion

egbinor

Member
Repairing my neighbors JD 790 tractor, no front wheel drive, no noise. Tore it apart and the pinion gear is wiped completly clean of teeth and there are no pieces anywhere, nothing but metallic sawdust! Ring gear looks like new! Has anyone seen this before? It's like the pinion was never hardend ? The bearings show minimum wear as well. Retired hvy duty truck mech and I've never seen this? EGBinOR
 

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