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Set the space between fourth stage boom tip and third stage tip at 9-3/4" (24.8 cm)
(Illustration A). Use a 9¾" (24.8 cm) long wood block to hold this distance while making
initial adjustment on the extension and retraction chain adjusters. Snug tighten the
retraction chain adjusters first. Then snug tighten the extension chain adjusters until they
are even with each other. While this adjustment is being done, the 9-3/4" (24.8 cm) tip
spacing must be held, as it is critical for alignment of the boom extension.
Inspection windows are provided on the bottom of the second stage to assure the proper
position of the retraction chain anchors. The number "3" or "4" should be visible in the
window on each chain anchor. (Illustration A). Remove wood spacer after extending boom
hydraulically. See final chain adjustment.
Courtesy of Crane.Market
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