55M4500CCE00 REV A
Step #16: “Loaded boom deflection”
This procedure is used to add an allowance into the calculation of the hook radius to
compensate for main boom and/or chassis deflection due to a suspended load. A
separate calibration is available for each crane configuration that also has an individual
no load calibration but is not used for configurations with boom attachments.
A no load calibration should be completed before continuing with this procedure.
This procedure should only be used with machine configurations on outriggers or on
crawlers.
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 a fully extended boom at approximately 60° boom angle. 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.
1)
Use
“
”
or
“
”
to highlight “Loaded boom deflection” and press
“
”
to enter.
The display will show the current boom length and a target boom length for calibration.
With the hook block suspended, telescope the boom out to the target length specified
on the display, this is normally the maximum length available for the duty so be sure to
check that the hook block does not foul the boom tip and that the boom is at a high
enough angle to safely permit maximum extension.
When the boom is at the desired extension the display will change to show:
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