What was found
SEVERE NOSE WHEEL SHIMMY OCCURRED DURING TAKEOFF ROLL AT APPROX 60 KNOTS REQUIRING AN ABORT. WAS ABLE TO CLEAR RUNWAY USING DIFFERENTIAL POWER AND BRAKING, BUT TILLER SPINS 360 DEGREES AS IF IT IS SPINNNG ON THE SHAFT. T/S AND INSPECTED NOSE GEAR AND TIRES NO DEFECTS, REMOVED AND REPLACED BOTH NOSE TIRES WITH OVERHAULED ASSEMBLIES, PERFORMED PART OF NOSE WHEEL SHIMMY CHECKLIST, FOUND TILLER PIN MISSING INSTALLED NEW TILLER LOCK PIN AND OPS CHECKS WERE GOOD. DATA REF: MM 32-41-01, RT WHEEL, NOSE (CE-X & CE-68 3-1538-1,SN 1023, TIME 152.1 CYCLES 94.0 OVERHAULED