Maintenance work on the superstructure
8.7 Main boom
03.11.2017
Maintenance manual 3 302 574 en 8 - 39
GMK3060
Information
If the main boom has been telescoped several times, the telescoping
mechanism and derricking gear can be so heavily loaded that the main
boom can be neither telescoped nor derricked. Therefore note the following
instructions:
• Before retracting the boom, derrick it to approximately 15°.
• Do not derrick the main boom below 0°.
Telescopic
section
I
• Observe the following instructions regarding maintenance work.
• Extend telescopic section I to 100%.
• Use a brush or a roller (PAL1) to lubricate
the outer, upper and outer, lower slide
faces (3).
• Use the grease gun (PAL1) to lubricate
the upper slide faces at the lubricating
nipples (1) on both sides.
• Use the grease gun (RHUS 2 AF) to lubricate
the locking pins at the grease nipples (2) on
both sides.
• Lock and unlock the telescopic section I
several times, so that the grease is
distributed over the locking pins.
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 rigging table which contains the required
telescoping. Set the associated rigging mode and enter the RCL code.
G
Risk of accidents from slipping off the main boom!
There is grease residue on the telescopic sections. For this reason, you
must not walk on the main boom.
Use the ladders provided with your crane!
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