55M4300CCE00 Rev A
Step #18: Attachment “Jib deflection”
This procedure is only available if jib duties are available and is optional depending on
the accuracy of the radius indication of the jib, it is used to add an allowance into the
calculation of the jib hook radius to compensate for jib deflection both with and without
a suspended load. A separate calibration is available for each and every jib attachment.
Jib deflection is an additional factor to the main boom deflection and the relevant main
boom deflection calibration should be completed before attempting this procedure.
A known test weight is required to carry out this calibration, the weight should be
between 50% and 90% of the SWL for the configuration being calibrated and should be
based on the SWL with the boom at the calibration angle chosen below, this angle is
normally approximately 60° but any value can be chosen if this proves unsuitable. The
calculated test load should normally include the weight of the hook block and any slings,
shackles etc. that are used.
Ensure the current duty selection matches the actual crane configuration to be
calibrated, this duty must be a jib duty.
1)
Use
“
”
or
“
”
to highlight “Jib Deflection” and press
“
”
to
enter. The display will show the current boom angle followed by a target boom
angle of 60° for calibration.
2)
Adjust the boom angle to the target angle, when the boom is at
the correct angle for calibration, the display will change to show OK. Note: if 60°
is unsuitable eg is below the minimum rated angle for the duty then set the
boom to a suitable alternative and ignore the target angle.
Summary of Contents for i4300
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