PAT Hirschmann DS85 Service Manual
The PAT Hirschmann DS85 Service Manual provides detailed instructions and guidance for
maintaining and troubleshooting the DS85 Load Moment Indicator (LMI) system, a vital
safety feature for crane operations. The DS85 LMI system warns operators of potential
overloads and unsafe lifting conditions, enhancing overall crane safety. The manual covers
a broad range of topics, from system components and operation principles to specific
maintenance procedures and troubleshooting techniques.
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The DS85 system is a CAN-bus-based system that integrates several components,
including a central processing unit, pressure transducers, angle sensors, length sensors,
and anti-two-block (A2B) devices. The central unit monitors and processes data from the
sensors, providing real-time feedback on crane load and movement. This feedback is
essential for preventing overloads by stopping certain crane functions if preset load limits
are exceeded. The system stores crane-specific data, such as load charts and boom
dimensions, in the central processor, which it uses to make calculations based on the
actual operating conditions.
1. Operating Console: Displays information on load, boom angle, length, and crane status.
It includes LEDs for operational warnings and an alarm system.
2. Pressure Transducers: Measure hydraulic pressure in the lift cylinder, providing data on
crane load conditions.
3. Angle and Length Sensors: Track boom angle and length through a potentiometer
system, delivering precise position data to the console.
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