The spring is removed by removing the nut on the top bolt and then putting a large screwdriver or 3/8" extension into the hole in the plastic lever arm and pulling back on the spring so that you can slide the top bolt out, at which time you release all the tension on the spring. You don't even need to remove the spring unless you want to.

The 17mm hex is only needed if you are removing the tension pivot arm for some reason.....

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)