Grove Published 7-23-2020, Control # 668-02 5-33
GRT9165 OPERATOR MANUAL SET-UP AND INSTALLATION
Cranes with Main and Auxiliary Hoists
If the main boom extension or fly section is not used, the A2B
switch must be plugged into the connector on the main boom
and the A2B switch weight must be mounted on the main
boom.
If the crane is operated with a main boom extension and the
main boom is equipped with a hoist rope, then the
connecting cable must be mounted between the connector
on the extension or lattice insert and the connector on the
main boom. In addition, weights must be fitted to both the
A2B switch of the main boom and the extension or fly
section.
If the boom extension is in working position and if the main
boom is not equipped with a hoist rope, then the A2B switch
on the main boom must be placed into its locked position.
After electrical connections have been checked to make sure
the system is properly connected for the respective crane
configuration, the following checks must be made:
1. Check electrical wiring connecting various parts of the
system for physical damage.
2. Check A2B switches and weights for free movement.
3. Inspect RCL cable drum for smooth running, initial drum
tension, and correct cable winding.
Check A2B warning light and acoustic alarm for both A2B
switches as follows:
1. Position boom over front of crane.
2. Manually raise weight fitted on the A2B switch. As soon
as weight is raised, the acoustic alarm should sound and
the A2B indicator should display.
3. Using the main hoist, pull hook block slowly against the
A2B switch weight. As soon as the hook block raises the
weight, the acoustic alarm should be triggered, the A2B
indicator should display, and the main hoist should
switch off. Lower the hook block slightly to eliminate this
condition.
4. Slowly lower the boom to bring about a potential two
block situation. As soon as the hook block raises the
weight, the acoustic alarm should sound, the A2B
indicator should display, and boom lower should switch
off. Lower the hook block slightly to eliminate this
condition.
5. Slowly extend (telescope out) the boom to bring about a
potential two block situation. As soon as the hook block
raises the weight, the acoustic alarm should sound, the
A2B indicator should display, and the telescoping
function should switch off. Lower the hook block slightly
to eliminate this condition.
6. If crane is equipped with a boom extension, the
inspection procedure must be repeated for the A2B
switch of the extension.
7. Verify display of main boom length agrees with actual
boom length.
8. Verify display of main boom angle agrees with actual
boom angles.
9. Verify display of the crane operating radius agrees with
the actual radius.
10. Verify load display by lifting a load of known weight.
Load display accuracy must be within the tolerance
range.
WARNING
The following tests must be performed with care to
prevent personnel injury or crane damage. Proper
functioning of the ODM requires successful completion of
these tests before starting work.
If the operator cannot see the hook block approaching the
boom nose, this task must be assigned to an assistant.
The crane operator must be prepared to stop the crane
immediately if the ODM is not working correctly, that is
when the warning indicators do not display, the acoustic
alarm does not sound, and the crane movements such as
raising, extending and luffing are not disabled.
WARNING
If warning indicators and audible alarm do not function as
described and crane movements are not switched off, the
system is not working properly. The malfunction must be
corrected before starting work.
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