From Electrical Pal, pg 6-4...
Wye wound motor for 240/480 3-phase volts...
It would appear that your motor was set for 240V and the T connections were:
1 to 7 and on to T1
2 to 8 and on to T2
3 to 9 and on to T3
4,5,6 are buried down in the peckerhead, all jumpered together.
Your '6' is a nine, for sure.
To connect at 480V you'll need to pull up the 4,5,6 leads and go with:
1 to T1
2 to T2
3 to T3
AND
4 to 7 jumpered
5 to 8 jumpered
6 to 9 jumpered
As always, if the rotation is wrong, swap T1 and T3.
