Description

Hirschmann 1351 2005 Operators Manual – Factory Load Moment Indicator Documentation

If you’re working on a crane with a Hirschmann PAT 1351 load moment indicator, you’ve got two choices: guess your way through the configuration setup or grab the actual factory manual. I’ve seen what happens when guys skip the calibration verification on page 33 – that’s how you end up with a boom angle limit that’s off by five degrees and a load chart that doesn’t match reality. This 44-page operators manual is the reference I’d put in any crane hand’s glovebox.

Why the Hirschmann 1351 Operators Manual Matters

Aftermarket copies of load indicator manuals are notorious for missing the fine print on safety warnings. The Hirschmann 1351 manual starts on page 1 with a full page of warnings – not the generic “read the manual” crap, but specific cautions about anti two-block systems and load cell accuracy. Page 1 spells out that you must verify the system’s warnings and shutdown functions after every configuration change. That’s not optional. This document is the only source for the OEM torque specs on the console mounting bolts and the sensor bracket fasteners.

System Description and Control Identification

Section 3 covers the system function and the operating console. You get a full layout of the PAT 1351 horizontal console with all button functions identified on page 5. If you’ve ever stared at a panel with unlabeled keys and wondered which one sets the slew angle limit, this section saves you the trial-and-error. The manual explains each LED indicator and what it means when the display flashes. No guesswork – it’s all there.

Configuration Setup: Reeving and Hoist Line Selection

Section 4 is where the real work starts. The LMI setup procedure begins on page 9 and includes the reeving configuration steps. You’ll need to input the number of parts of line – the manual tells you exactly how to scroll through the menu and save the setting. The quick hoist line selection on page 14 lets you switch between main and auxiliary hoist without digging through submenus. I’ve used this procedure on a Link-Belt and a Grove – the steps are identical because Hirschmann builds these systems for multiple OEMs.

Pre-Operation Inspection: The 6.1 and 6.2 Procedures

Pages 31 and 32 walk through the pre-operation inspection and calibration verification. For machines with only a main hoist, the check is straightforward – verify the zero load reading, then test with a known test weight. For machines with main and auxiliary hoists, the procedure adds steps to check both load sensors independently. Section 6.3 shows how to install the anti two-block retainer in the locking position. Don’t skip this – the anti two-block system is your last defense against ripping the boom tip off.

System Function: How the LMI Protects Your Crane

Section 3.1 explains the system function in technical detail. The Hirschmann 1351 monitors boom angle, radius, load on the hook, and tip height. It compares actual readings against the crane’s load chart stored in memory. When you hit 90% of rated capacity, you get a pre-warning. At 100%, the system cuts the hoist and boom functions. The manual includes a table of limit settings – you configure which functions get stopped based on the violation. This isn’t a book you read once; it’s a tool you reference every time the crane goes to a new site.

Troubleshooting: Malfunction Table and Operating Errors

Section 8 starts on page 35 and gives you a malfunction table with common fault codes and their causes. Operating errors are covered on page 36 – things like “load reading drifts when the crane sits in the sun” or “boom angle won’t calibrate after a sensor swap”. The troubleshooting steps are sequential and include voltage checks at the console connector. You can grab a multimeter and follow the steps without calling the factory hotline. That saves you a day of downtime.

Does This Manual Cover Boom Angle and Radius Limits?

Yes, Section 5.1 covers four separate limit types: slew angle limitation (page 19), tip height limitation (page 24), boom angle limitation (page 25), and radius limitation (page 27). Each limitation has its own setup procedure with the key sequences. The manual also includes the info crane configuration section (page 29) where you set the current reeving and jib configuration. If you’re running a fly jib or a luffing jib, Section 5.2 shows you how to input that data so the load chart stays accurate.

Related Manuals

• Hirschmann PRS 40 EZ 2010 Operators Manual – Factory Specs
• Hirschmann iSCOUT expert compact 2007 Operators Manual – Factory Crane Specs
• Hirschmann PAT PRS 80 2005 Operators Manual – Factory Specs for Crane Load Indic

External resource on Manual Transmission and Manual Transmission – not directly related, but if you’re rebuilding a truck crane, you’ll need both the transmission manual and the LMI manual. Don’t mix them up.

FAQ

Is this the original OEM manual or a reprint?

It’s a direct scan of the factory Hirschmann document – no reprints, no third-party rewrites. The cover page shows P/N 031-300-190-192 REV – 05/15/2005 exactly like the printed copy.

What does the troubleshooting section cover?

Pages 35-36 list a malfunction table and operating errors. For instance, it covers issues like loss of display, incorrect load readings, and wiring faults. The manual walks you through checking sensor voltages and re-calibration steps. That’s the kind of detail aftermarket copies skip. You also get the general troubleshooting flow for the whole system, including fuse checks and connector pin inspections. It’s enough to solve 90% of the console problems without calling Hirschmann support.

You’ll use this manual every time that crane goes to a new job site or suspects a calibration drift. Access the Factory Manual from AutoRepairManuals now and keep it in the cab or on the shop tablet. Your boom – and the ground crew – will thank you.