SAFETY INFORMATION GRT880 OPERATOR MANUAL
2-42 Published 3-25-2020, Control # 643-04
MODEL SPECIFIC INFORMATION
Crane Stability
The GRT880 rubber 360° load chart has a minimum radius
of 4.5 m (14.8 ft) with a load. Without a load, a radius of
3.5 m (11.5 ft) is safe for 360° on rubber. A radius of less
than 3.5 m (11.5 ft) must be avoided on rubber 360° because
of backward stability considerations.
Hoist Platform
Travel Position
Hoist platform must be in the travel position when moving the
crane. Refer to Figure 2-11.
1. Lower two hoist mirrors (1).
2. Remove two pins and lower rear rail (2). Reinsert pins.
3. Remove two pins and lower side rail (3). Reinsert pins.
4. Lift and slide steps (4) into retaining bracket. Pull out on
steps to ensure notch is engaged in bracket.
OVERLOAD INSPECTION
When the RCL system has acknowledged an overload on
your crane, you must carry out specified inspections on the
crane.
These inspections apply only to overloads up to 50%. For
overloads of 50% or higher, crane operation must be
stopped immediately and Crane Care must be contacted for
corrective action.
The following illustrations may not be an exact
representation of your crane and are to be used for reference
only.
NOTE: If your crane is equipped with CraneSTAR, an
overload warning will be posted to the web site for
review by the crane owner.
Overload warnings do NOT indicate real time
events! Warnings could be sent 24 hours (or more)
after the actual event.
DANGER
Do not use platform for hauling passengers. Death or
serious injury could occur.
No storage of components are allowed on the platform.
Only one person at a time is allowed on the platform.
WARNING
Overload Hazard!
To avoid an accident caused by overload damage to
your crane:
• Perform the inspections outlined in this publication
for overloads up to 50%.
• Stop operating the crane and contact Manitowoc
Crane Care immediately for overloads of 50% and
higher.
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