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Failure to obey the instructions and safety rules in the appropriate Operator's Manual and Service Manual for your machine will result in death or serious injury. Many of the hazards identified in the operator’s manual are also safety hazards when maintenance and repair procedures are performed.

Do Not Perform Maintenance Unless:

  1. You are trained and qualified to perform maintenance on this machine.
  2. You read, understand and obey:
    1. manufacturer’s instructions and safety rules
    2. employer’s safety rules and worksite regulations applicable governmental regulations
  3. You have the appropriate tools, lifting equipment and a suitable workshop.

Material Hook Mode on JLG Towable Booms

Models Affected : JLG® Towable Boom Lifts T350 and T500J

Receiving the message “Running at cut back in material hook mode” on a JLG Towable Boom model indicates that the machine does not recognize the presence of the upper control box. When this happens, the unit assumes that the basket has been replaced with a material hook. If the upper control box is present on the machine and this message still appears, contact the JLG service department for assistance.

This short video explains how to properly detach the platform and upper control box and install the material hook for T350/T500 model booms.