Check that the front spacer bar and
that the bed knife is not loose. If the frame
is loose, it is probably out of alignment.
Check the mower manufacturer’s manual
to reset alignment.
Check the reel for free rotation and
examine the reel blades for bad nicks that
might indicate a twist or sprung spider.
Check to see that reel blades are
securely fastened to the spiders and that
the spiders are secure on the reel shaft.
Repair as necessary.
Check for axial and radial play in the
reel bearings. Adjust or replace the
bearings in accordance with the
manufacturer’s manual.