Maintenance work on the superstructure
8.7 Main boom
09.03.2018
Maintenance manual 3 302 744 en 8 - 53
GMK5250L
8.7.4 Pressure accumulator – checking the gas pressure
The pressure accumulator (1) is located on the
telescoping cylinder.
The filling pressure at 20 °C (68 °F) is 95 bar
(1377 psi).
• Have the filling pressure checked and if
necessary corrected by
Manitowoc Crane Care or an authorised
GROVE dealer.
• Consult the Chapter: à Lubricating the telescopic sections, p. 8 - 48.
• Familiarise yourself with the slinging points for personal safety
equipment on the GMK5250L truck crane;
à Operating manual.
Prerequisites – The truck crane must be level.
– The hook block must be unreeved.
– The main boom must be completely retracted and lowered into horizontal
position.
– A rigging mode must be created with a telescope status which satisfies
the lifting capacity table necessary for maintenance;
à Lifting capacity
table
; Section Telescoping sequences for lubricating the boom.
– The RCL code for the current rigging mode must be entered.
– Personal safety equipment to secure you from falling is used;
à Operating manual.
s
G
Risk of accidents due to incorrect inspection
The gas pressure test must be carried out only by an authorised official
inspector of pressure tanks or under his/her supervision or instructions.
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