Description

Hirschmann HC4900 2014 User Manual – Load Moment Indicator Factory Specs

If you’ve ever had a load moment indicator give you a false reading on a crane job, you know the headache. A tenth of a degree off on the angle sensor or a bad pressure transducer can shut down a lift or – worse – put the load in the red zone without a warning. That’s why Hirschmann HC4900 2014 User Manual belongs on your workbench or in your service truck. This is the exact OEM document Hirschmann shipped to Zoomlion for the RT crane with a 5-section boom. 41 pages, no reprints, no aftermarket edits.

Load Moment Indicator: What the Manual Covers

Chapter 3 breaks down the full system configuration. You get the HC4900 controller, IC4600 console, DAVS pressure transducer, LWG208 length/angle sensor, and the anti-two block switch. Each subsection has technical data and installation steps. For example, the DAVS pressure transducer section on page 5 gives the transducer specs and tells you exactly how to mount it without crushing the diaphragm. If you skip that step, you’ll chase ghost readings all day.

7 Systems Detailed in the HC4900 User Manual

The manual covers seven major subsystems: general information, warnings, system configuration, operation display interface, operation method (including function setting, OM setup, reeving setup, and error code reference table on page 21), LMI system functions (warning and prohibition), and daily maintenance with calibrations. That last chapter – chapter 7 – is where you’ll spend your time. It walks you through length sensor adjustment, angle sensor adjustment (page 26), and a Q&A section for common hiccups like a length cable that won’t retract smoothly.

Get the Right Calibration Data from Page 26

Angle sensor adjustment. That’s page 26. If you’re swapping a sensor or recalibrating after a boom rebuild, you need the factory procedure. The manual tells you exactly which output voltage corresponds to zero degrees and how to lock the adjustment. No guessing. No third-party approximation. This is the same data a Hirschmann field tech uses.

Does This Manual Cover the IC4600 Console?

Yes. Section 3.2 covers the IC4600 console. You’ll see the display interface on page 11 (note the manual says “values are not real” for the example) and the utilization bar graph on page 13. The indicator light section explains the color codes – amber warning, red prohibition. If you’ve ever had an operator tell you the red light came on for no reason, you can pull up page 13 and check the logic.

Understand the Anti-Two Block Installation Before Rigging

Anti-two block switch installation is in section 3.5.2 on page 9. The manual shows the switch wiring and the mounting bracket orientation. Aftermarket manuals often draw the switch upside down – I’ve seen it. This PDF shows the correct orientation for the Zoomlion RT crane. Rigging a job without verifying the anti-two block? That’s how you get a two-block incident. Don’t.

If you’re working on a crane with a Manual Transmission, that’s a separate system, but the load moment indicator interacts with the engine and hydraulic controls. The HC4900 connecting diagram (chapter 9) gives you the full pinout. Use it before you meter any circuit.

For other Hirschmann load indicator manuals, check the Hirschmann QUY260 Load Moment Indicator User Manual 2009 or the Hirschmann iVISOR Mentor QVGA User Manual 2009 if you need a different display console. If you’re working on a PRS system, the Hirschmann PRS 40 EZ 2010 Operators Manual – Factory Specs covers that.

Source Validity: OEM vs. Aftermarket

This is Hirschmann’s own PDF from 2014 – edition 6, August 2014. The copyright page states it’s proprietary and cannot be copied without written authorization. That alone tells you it’s the legit document. Aftermarket manuals often skip the warning chapter (chapter 2) or condense the Q&A from page 27 into a few lines. Here you get the full warning text, including Hirschmann’s disclaimer that they aren’t liable for inaccuracies – which is standard OEM legalese but still better than a reprint that invents torque values.

FAQ

Is this manual specific to the Zoomlion RT crane?

Yes. The cover says “For Zoomlion RT Crane With 5-section boom.” The system configuration and wiring diagrams match that chassis. If you have a different crane model, you still get the HC4900 controller and sensor data, but bracket dimensions and cable lengths may differ.

Does page 21 list all error codes?

Page 21 has the error code reference table. It includes dozens of codes like E94 shown in the manual example. The table explains what each code means and the probable cause. If your LMI is throwing an E94, you can go straight to that table and start troubleshooting without calling Hirschmann support.

This Hirschmann HC4900 2014 User Manual is 41 pages of factory-approved procedure. Whether you’re a shop foreman or a crane owner-operator, you need the OEM calibration specs, not a copy from a forum. Access the Factory Manual from AutoRepairManuals and keep it on your tablet in the cab.