JLG 660SJ Operator Manual - Manual (Page 76)

SECTION 4 - MACHINE OPERATION
4-18 – JLG Lift – 3121205
Figure 4-7. Machine Tie Down
NOTE: When transporting machine over rough terrain or long distance, the
boom needs to be chocked and strapped whenever the base boom
is unable to rest on its pad. This prevents the boom from bouncing
up and down preventing possible damage while transporting.