Manitowoc Grove GMK 5250L

Maintenance work on the superstructure
8.7 Main boom
09.03.2018
Maintenance manual 3 302 744 en 8 - 55
GMK5250L
8.7.5 Checking the sheaves
• Check all sheaves (1) on the main boom
head (2) for damage, wear, mobility and
heavy soiling.
Have damaged, worn, stiff or extremely soiled sheaves replaced by
Manitowoc Crane Care or an authorised GROVE dealer or your repair crew.
8.7.6 Checking the locking system
• Have the main boom locking system checked regularly by Manitowoc
Crane Care
or an authorised GROVE dealer.
M 3
M 12
G
Risk of accidents if maintenance work is not carried out.
Have the maintenance work on the main boom locking system performed
regularly by
Manitowoc Crane Care or an authorised GROVE dealer.
This prevents the complete unlocking of a telescopic section in emergency
operation/emergency program mode, which could cause serious accidents
and damage to the truck crane.