PAT DS 50 Load Moment Indicator Service Manual

An LMI watches crane loading. It reads boom length, angle and load, then warns the operator or locks out functions before the crane goes past its limits. When it throws an error, loses its display or reads wrong, the person who picks up this service manual is a technician trying to find the fault and fix it in-house.

What this manual helps you do

• Diagnose faults using the error codes section and the general troubleshooting information.
• Trace a no display problem or a function lockout back to its cause.
• Troubleshoot length, angle and load reading problems one sensor at a time.
• Check the data transfer between the central unit and the console.
• Follow the procedures and the moisture troubleshooting steps, and use the sensor theory to understand what each reading should be doing.

Who this is for

Crane service technicians, rental fleet mechanics and independent repair shops that fix LMI problems themselves. It also suits anyone who inherited a crane with a DS system and no paperwork. The cover may show the older Hirschmann name, so don't let the logo throw you.

FAQ

Q: What do I receive and how is it organised?

A: You get 1 PDF file, 61 pages, in English. The text is searchable, so you can jump straight to an error code or a symptom. Sections run from general information and warnings through system description, troubleshooting, drawings and procedures.

Q: Which unit does it fit?

A: It is written for the PAT DS 50 and also covers the DS 160. The publication number is 031-300-190-142, and the title on the manual reads DS 160 Load Moment Indicator Service Manual. It includes a DS50C to DS160 upgrade installation section.

Q: How does it fit the job I'm doing?

A: If the LMI is down or misreading, the troubleshooting sections are laid out by symptom: no display, anti-two block, length, angle and load. You start with what the machine is doing and work toward the fault.

If you're repairing a DS 50 or DS 160 system, this manual gives you the symptom-based troubleshooting, drawings and procedures to get it done in your own shop.

Click here to view the preview (PDF)

Models covered by this manual

This service manual is also used for one further Load Moment Indicator model: DS 160. Check the model and serial number on your data plate before ordering.

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