Maintenance work on the superstructure
8.8 Main boom
16.11.2018
Maintenance manual 3 302 756 en 8 - 67
GMK6400
Notes
If the main boom has been telescoped several times, the telescoping mech-
anism and derricking gear can be so heavily loaded that the main boom can
be neither telescoped nor derricked. Therefore note the following instruc-
tions:
• Before retracting the boom, raise it to approximately 15°.
• Do not lower the main boom below 0°.
Telescopic
section
I
• Observe the following instructions regarding maintenance work.
• Extend the telescopic section I to 100%.
Lubricate the slide faces
• Use a brush or a roller (PAL1) to lubricate
the outer, upper and outer, lower slide
faces
(2).
• Use the grease gun (PAL1) to lubricate the
upper inner slide faces (3) at the lubricating
nipples (1) on both sides.
s
G
Risk of overturning when telescoping if the RCL is overridden!
Do not override the rated capacity limiter (RCL) when telescoping is
switched off. Select a suitable lifting capacity table which contains the
required telescope status. Set the associated rigging mode and enter the
RCL code.
G
Risk of accidents from slipping!
There is grease residue on the telescopic sections. For this reason,
you
must not walk on the main boom.
Use the extendable ladders provided with your crane!
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