General Information 
© Hirschmann Rev. I 05/22/17  190154_I.DOC 
1  GENERAL INFORMATION 
 
This service manual is designed to assist a service or maintenance person in identifying system 
problem areas or malfunctions. A digital voltmeter with the capability to measure current will be 
required, along with standard maintenance and service tools. NOTE: Knowledge of how to use a 
voltmeter to measure both voltage and current is assumed. 
 
REFERENCE: 
For system operation, refer to the consoles operator’s manual 031-300-190-147. 
 
2  WARNINGS 
 
The LMI is an operational aid that warns a crane operator of approaching overload conditions and 
over hoist conditions that could cause damage to equipment and personnel. 
 
The device is not, and shall not be, a substitute for good operator judgment, experience and use of 
accepted safe crane operating procedures. 
 
The responsibility for the safe crane operation shall remain with the crane operator who shall ensure 
that all warnings and instructions supplied are fully understood and observed.  
 
Prior to operating the crane, the operator must carefully and thoroughly read and understand the 
information in this manual to ensure that he knows the operation and limitations of indicator and 
crane. 
 
 Proper functioning depends upon proper daily inspection and observance of the operating 
instructions set forth in this manual. Refer to Section 6. Pre-Operation Inspection and Calibration 
Verification of the operator’s manual. 
 
 
 
 
The  LMI  can  only  work  correctly,  if  all  adjustments  have  been  properly  set.  For  correct 
adjustment, the operator has to answer thoroughly and correctly all questions asked during 
the  setup  procedure  in  accordance  with  the  real  rigging  state  of  the  crane.  To  prevent 
material damage and serious or even fatal accidents, the correct adjustment of the LMI has 
to be ensured before starting the crane operation.