Manitowoc Grove GMK 5250L User manual

Maintenance manual
3 302 744 en
09.03.2018

09.03.2018
3 302 744 en Maintenance manual
GMK5250L
© Copyright reserved by
Manitowoc Crane Group Germany GmbH
Industriegelände West
D-26389 Wilhelmshaven, Germany
Tel.: [+49] (0) 44 21 294-0
Fax: [+49] (0) 44 21 294-301
The passing on or duplication of this document as well as the utilisation and disclosure of its contents is prohibited unless
expressly permitted. Infringement will incur liability for compensation. All rights pertaining to registration of patent or utility
model are reserved. The original language of this document is German.
Important note
Any type of duplication or excerpt from this
document, even in electronic form,
is not subject to the revision service of
Manitowoc Crane Group Germany GmbH.

Additional pages for maintenance manual 3 302 809 en 1
GMK truck cranes
03.09.2018
1Additional maintenance work
on the rope attachment point
Depending on the equipment of the truck crane, a rope attachment point (1)
can be fitted between the lower sheaves on the main boom head.
•Check on both sides whether the rope attachment point (1) is equipped
with a grease nipple (2).
1.1 Main boom
1.1.1 Lubricating the rope attachment point
Grease, tools
– Grease gun from the tool set; supplied ladder.
Prerequisites – The main boom must be completely retracted and lowered into horizontal
position.
– The hook block must be unreeved.
– The engine must not be running and must be secured against unauthor-
ised use.
Lubrication
•Lubricate the rope attachment point (1) on
the grease nipple (2) with the grease gun
every three months (M3).
•Check whether the rope attachment point (1)
on the axle can be freely rotated.
If you discover any damage
•Have the defective rope attachment point re-
placed by Manitowoc Crane Care or an au-
thorised GROVE dealer.
M 3
Lubricating
grease
Designation
to DIN 51502
Specifications
Classification
GROVE part no.
Grease KP - 1K - 50 DIN 51825 03233369

03.09.2018
2 3 302 809 en Additional pages for maintenance manual
GMK truck cranes
Blank page

Additional pages for maintenance manual 3 302 836 en 1
GMK truck cranes
22.11.2018
1Protection of the main boom telescopic sections
1.1 Additional monthly maintenance work (M 1)
1.1.1 Checking the guard strips
The figure shows the main boom on a GMK5250L truck crane.
Other GMK models have a similar arrangement of guard strips (1) on the
upper surface of the telescopic sections.
The guard strips (1) are replaceable parts that must be checked regularly.
Check
•Check all guard strips (1) on all telescopic
sections for damage, wear and formation of
grooves by the hoist rope.
Turn if necessary
You can turn the guard strip, but only when
the bottom of the groove lies significantly
above (X) the telescopic section (2).
•(A) – Remove all screw connections (3).
•Remove the guard strip (1) and clean the
guard strip and the top surface of the
telescopic section.
•(B) – Turn the guard strip (1) by 90° and
fasten all screw connections (3).
s
M 1
SRisk of damage to the telescopic sections and hoist rope!
The hoist rope can form grooves in the guard strips when the crane is used
intensively. The hoist rope and telescopic section will be damaged when
the groove depth reaches the metal of the telescopic section.
You must therefore turn or replace the guard strips in time (1).

22.11.2018
2 3 302 836 en Additional pages for maintenance manual
GMK truck cranes
When turning three times is no longer sufficient
•Have the damaged guard strips replaced by Manitowoc Crane Care or an
authorised GROVE dealer or your qualified repair crew.
1.1.2 Conversion from plastic guard strips to steel rollers
GMK 6300L-1 The GMK 6300L-1 truck crane is delivered as standard with steel rollers
running in ball bearing races.
GMK 5250L and
GMK 6300L
The GMK 5250L and GMK 6300L truck cranes can be delivered with/
converted to steel rollers running in ball bearing races as additional
equipment.
•Contact Manitowoc Crane Care for information on the details and cost of a
conversion.
1.1.3 Checking the steel rollers
•Check all steel rollers (1) on all telescopic
sections for damage, wear and mobility of
the ball bearings (2).
•Have damaged, worn, stiff or extremely
steel rollers replaced by Manitowoc Crane
Care or an authorised GROVE dealer or your
repair crew.
M 1

09.03.2018
Maintenance manual 3 302 744 en
GMK5250L
Contents:
1General instructions
2Safety and environmental protection
3Cleaning
4Run-in regulations
5Maintenance overview
6Lubricants and consumables
7Maintenance work on the carrier
8Maintenance work on the superstructure
9Longer out of service periods
10 Torques
11 Spare parts required for maintenance
Appendix
This maintenance manual does not replace the operating manual.
Details of operation and standard safety instructions can be found
in the operating instructions.

09.03.2018
3 302 744 en Maintenance manual
GMK5250L
Blank page

09.03.2018
1
Maintenance manual 3 302 744 en
GMK5250L
1 General instructions
1.1 Instructions for using the maintenance manual. . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 1
1.2 Warnings and symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 1
1.3 Maintenance instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 2
1.4 Instructions regarding the electronic control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 4
1.5 Safety instructions for welding work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 4
1.6 Definition of direction references. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 5
1.7 Conversion table for US measuring units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 6

09.03.2018
3 302 744 en Maintenance manual
GMK5250L