Gene Sage

Member
On 66 series tractors there are 2 lugs attaching the wheel to the rim that are slightly different. What is their purpose and where are they to be
positioned?
 
That should be 90 degrees, not 180.

The lugs are "fixed" lugs where the rest are "wedge" lugs. The fixed lugs establish the location of the rim on the wheel, and you adjust the rest of the lugs to get it to run true. They also ride up against the drive nubs in the rim and keep the rim from slipping on the wheel.
 
Don't know about all the 66 series, but when the 666 came out they wanted the 2 different ones 90 degrees apart and tighten them first with the two at top or top of wheel centered between the two clamps. Then the rest of clamps tighten. Supposed to center the rims for less run out was the reason.
 
If you put all that power to the ground,it will tear the rear end out long before the 'correct' placement of the wedges comes into play.
 
The differential has needle bearings, the transmission has different gears and the clutch is a triple disk 11". I've tried to address the weak components.
 
The "Double Bevel Rims started to be used on the 300 & 400 model tractors around 1955 or '56. Used on ALL the 350/450/460/560 and following models.

There's good instructions for proper mounting of the double bevel rims on the wheels in the operator's manuals from the 350/450 up to the 3X88 and 5X88's.
 

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