Maintenance work on the superstructure
8.7 Main boom
25.11.2016
Maintenance manual 3 302 364 en 8 - 49
GMK 4100L-1
• Derrick the main boom to 15°.
• Retract the telescopic section V to 0% and
extend the telescopic section
VI to 50%.
• Lower the main boom to 0° – do not lower
to below 0°.
• Extend the telescopic section V to
approx. 75%.
• Use the grease gun (PAL1) to lubricate the
upper inner slide faces at the lubricating
nipples (1) on both sides.
• Raise the main boom to 15°.
• Retract the telescopic sections V and VI to 0%.
• Fully extend and retract the telescopic section VI again so that the grease
is distributed over the telescope slide faces.
• Lower the main boom to 0°.
• Lubricate the telescopic sections V, IV, III and II in the same way.
Before driving the truck crane
Fully retracting all telescopic sections of the main boom after greasing
may result in excess lubricant paste emerging at the collar (1).
• Remove any excess lubricant paste from the collar (1).
This is to prevent any lumps dropping off on to the windscreen
and suddenly obstructing the view when driving.