SOURCE: do mandrels on 48'' deck come threaded for mount or not?
Most of the time you get self tapping screws with them or if you want you could get bolts nuts and washers (,lock) make sure the shafts and height are right.
SOURCE: mandrel chews pulley
Are you sure the spindle is not bent and also are you balancing the blades when sharpening. Other then that make sure bolts are tight on the mandrel. With the deck off and standing up spin the blades and watch center of balde to see if something is bent. Also watch pulley on the other side to see if its bent.
SOURCE: mandrel ruins pulley
there are only a couple of things that could be causing this: either the spacer [looks like a thick washer] is put on above the pulley [it goes UNDER the pulley], or the nut holding the pulley on is not being tightened enough
SOURCE: Repair or replace trans axle pulley on a sears
since the parts illustration doesn't show a woodruff key, i would guess that the input shaft of the transaxle has a flat area that matches up to a flat on the pulley - if it's just spinning, that would mean either the flat has been worn out, the center of the pulley has broken the weld, or the transaxle has something broken internally - the pulley is held on with a snap ring and thrust washer, remove those and the pulley should slide off the shaft - pulley part no. is 184787
Testimonial: "Its what I figured.. Now the trick is to how to removethepulley. The clearance between the frame and the shaft is smaller than the width of the pulley"
SOURCE: I changed the blade mandrel from my 42 inch cut
Ok Go to partdirect on the Sears website. Enter the 917. xxxxx number that will bring up the drawings and should show you were the spring goes. As for the lock nut its 9/16-18 .You should have gotten a new locknut with the new mandrel.
GOOD LUCK
MIKE
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i believe it is RH thread.
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