Demco AB20001 owner manual Adjustment Procedures

ADJUSTMENT PROCEDURES

After the boom is completely assembled and before attempting to fold the boom for the first time, the boom should be adjusted so it lays straight both horizontally and vertically. There are several ad- justment points built into the boom for this purpose.

1.All adjustments must be done with the boom unfolded and latched. Begin by adjusting the right and left boom carrier brackets (#13 & 14 on page 4). Adjust the brackets (#13 or 14) forward or backward against the top tube of the boom center section so as to act as a guide for the center section to keep it straight up and down, not tilting forward or backwards. When the auto-level sway control brackets are adjusted and tight- ened, the 1/2" x 4-1/2" bolt through the top of the sway guide can be adjusted to snug the bracket against the rear side of the top of the center section tube. This adjustment should not restrict the side to side sway of the boom but be enough to dampen it and support the boom from exces- sive rear forces.

3.The wings on either side must be adjusted hori- zontally by moving the linkage mounting plate (#10 on pages 5 & 6) up or down on the inner hinge to get the wing level.

4.The outer breakaway hinge can be adjusted for breakaway tension by tightening or loosening the 1/2" locknut (#16 on page 7). You may have to adjust the lock collar down to get more spring compression. The outer wings should be set to breakaway after a 50 lb force or better is applied to the wing tips. The springs should not be compressed more than 3-1/4 inches.

5.At this time the latches should be adjusted at each hinge so the wings will be locked securely after unfolding. There are 1/2" bolts at each hinge point that act as a stop. These stop bolts must be adjusted in or out to straighten the lay of the boom. After these bolts are adjusted, the tee bolt in the clevis end of the latch should be adjusted to securely latch each wing. It is important that the latch locks over-center otherwise there will be problems with it coming unlocked. If adjustment is required with the latch not locking over-center you must grind or file down the latch stop which will then let the latch go over-center and lock securely.

6.After the boom is setup and the storage brackets are placed in their approximate location final adjustments can be made by folding the boom, in the proper procedure (see page 10), slide the storage brackets into the exact location when the wings are folded and tighten in place.

7.If your flotation boom is equipped with a manual or hydraulic height adjuster the following adjust- ments must be made. Adjust the boom carrier brackets inwards by tightening the 3/8" x 1-1/2" bolts that protrude sideways out through the carrier bracket and the boom carrier, when these brackets are snug on the height adjust tubes tighten the 3/8" x 1-1/4" to lock these plates tight against the boom carrier. Make sure the assem- bly slides up and down freely on the tubes. After this is done adjust the height adjust lock pin brackets. Carefully raise or lower the boom carrier so the lock pins are lined up with holes in the upright tube. Securely block the carrier at this level and adjust the latch pin brackets so the pin will latch securely and easily in the holes in the upright tubes. Tighten the 1/2" bolts holding these lock brackets securely and make sure the pins are securely seated in the holes before removing the blocks.

Note: Always make sure the lock pins are securely locked after any type of height ad- justment or before any work is done on the boom.

8.Make sure all fasteners are tight or at the proper tension, and hoses are not in the path of any folding procedures.

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