PAT Mark 4K Load Moment Indicator Service Manual

A load moment indicator watches the crane's loading and tells the operator how close the lift is to its limit. On the Mark 4K, that work depends on the central unit, the angle and length transducers, and the wiring between them. A technician opens the service manual when one of those parts is faulty, needs replacing, or needs to be set up again after a repair.

What this manual helps you do

• Trace faults with the troubleshooting flow charts, starting from the symptom on the crane.
• Look up operation error codes in the error code table and see what each one points to.
• Replace the angle transducer and adjust it afterward.
• Replace the length transducer and run through its adjustment steps.
• Set the basic hardware adjustments on the central unit, using the mechanical and electrical description as your reference.

Who this is for

A crane service technician or dealer technician who is fixing a Mark 4K in the shop or out in the yard. It also suits a rental fleet mechanic or an independent repair shop that has a machine with this system and needs workshop-level procedures.

FAQ

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

A: You get one PDF file, 74 pages, in English. The text can be searched and copied, so you can jump to an error code or a transducer procedure quickly. It is split into component descriptions, central unit description, basic hardware adjustment, and numbered sections for definitions, drawings, flow charts, the error code table and transducer work.

Q: Which equipment does it fit?

A: It is the Mark 4K Service Manual for the PAT Mark 4K load moment indicator.

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

A: If you're chasing a fault, you can go from the error code table to the flow charts. If you're swapping a transducer, the replacement and adjustment sections walk you through it. The drawings help you identify what you're looking at before you pull anything apart.

Pull up the flow chart or the transducer section that matches your fault, and work through it with the crane in front of you.

Click here to view the preview (PDF)

Table of Contents:

• MECHANICAL DESCRIPTION OF THE COMPONENTS
• MECHANICAL AND ELECTRICAL DESCRIPTION OF THE CENTRAL UNIT
• BASIC ADJUSTMENT OF THE HARDWARE
• SECTION 1. DEFINITIONS
• SECTION 2. DRAWINGS
  • DRAWING 1. Indicator Panel MK4k
  • DRAWING 2. Central Processor MK4k
  • DRAWING 5. Angle Sensor Adjustment
• SECTION 3. Troubleshooting Flow Charts
  • General Flowchart
  • Lever Lockout Activated
  • Load Reading Problem
• SECTION 4. Operation Error Code Table
• SECTION 5. Angle Transducer Replacement and Adjustments
• SECTION 6. Length transducer Replacement and Adjustments
• SECTION 7. Length transducer Replacement and Adjustments

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