4. If the gap is less than .25 inch (6 mm), loosen adjustment D and tighten adjustment C
until the gap is within specifications.
5.
If the gap is more than .38 inch (10 mm), loosen adjustment C and tighten adjustment
D until the gap is within specifications.
6.
Fully retract the boom and recheck the gap. Repeat step 3 through 5 if necessary.
7. Fully extend the boom horizontal.
8. Through the first hole in the side plate of the third boom section (the hole closer to the
second section), measure the sag of the retract chain. This measurement must be
taken from the bottom of the third section to the bottom of the chain. This dimension
should be 2.75 inches (70 mm) to 3 inches (76 mm).
9. If the dimension is greater than 3.00 inches (76 mm), loosen adjustments C and D
equal amounts until the measurement is within specifications.
10. If the dimension is less than 2.75 inches (70 mm), tighten adjustments C and D equal
amounts until the measurement is within specifications.
11. Under the same condition, the maximum sag in the extend chain should be 7.00
inches (178 mm) to 7.50 inches (190 mm). This measurement is from the bottom of the
third boom section to the top of the extend chain.
505P/N 12261-683 REVISED: January 2015
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