SkyTrak 8042 Operation Manual - Manual (Page 157)

General Maintenance
155 Model 8042 Rev. 11/03
11. Measure the sag (3) in the top boom extend chains (4) between the
bottom of the chains and the top of the intermediate boom (5) at
their closest point. Acceptable boom chain sag is between 1.5"
(38 mm) and 2.5" (64 mm). If the measurement is less than 1.5"
(38 mm) or more than 2.5" (64 mm), the top boom chains need to
be adjusted. See “Top Boom Chain Tension Adjustment” on
page 156.
OA0491
3
4
5