Maintenance work on the superstructure
8.11 Main boom
8 - 86 3 302 577 en Maintenance manual
GMK7450
16.08.2018
8.11.2 Lubricating the locking pins
Reducing the
interval
Under difficult operating conditions – at extremely sandy or rainy locations –
you must lubricate them more frequently.
Grease, spare
parts, tools
Prerequisites – The truck crane is supported on an outrigger span of 8.76 m x 6.10 m
(28.7 ft x 20
.0 ft) and has been rigged with at least a 60 t counterweight
or
– the truck crane is supported on an outrigger span of 8.76 m x 8.90 m
(28.7 ft x 29
.2 ft) and has been rigged with at least a 40 t counterweight.
–
The truck crane must be level.
– The hook block must be unreeved.
– The main boom must be completely retracted and lowered into horizontal
po
si
tion.
Information
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°.
Lubricating
grease
Designation
to DIN 51502
Specifications
Classification
GROVE part no.
Spray Spray on Berulub; 0.5 litres
(spray-on spray)
01929824
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 ladder provided with your crane!
G
Risk of overturning when telescoping if the RCL is overridden!
You must override the rated capacity limiter (RCL) in order to telescope a
second telescopic section in a
horizontal position.
When the RCL is overridden, only carry out a telescopic extension as far as
specified here. In this
way, you avoid overturning the truck crane – even
when it is rigged with a 60 t counterweight and the superstructure is rotated
to the rear.
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