JLG M450 ANSI Service Manual - Manual (Page 142)

SECTION 4 - BOOM & PLATFORM
4-30 – JLG Lift – 3121127
5. After grinding it may be neccesary to help the rivet
out by using a center punch with a hammer.
NOTE: It may be necessary to loosen the fixed end brackets
from the machine in order to twist and pull the track
section enough to disconnect the links.
6. Using a flat head screwdriver between the links,
twist the screwdriver and pull the links apart.