Description

Hirschmann DS 350 GW, DS350G 2005 Service Manual

You are staring at a load moment indicator that won’t sequence the boom, and the aftermarket manual you bought online has torque specs that don’t match the hardware on the bench. I have been there. The Hirschmann DS 350 GW, DS350G 2005 Service Manual is what you need – 49 pages of factory-level troubleshooting for the TM9150 boom control system. No reprints, no generic diagrams. Hirschmann printed this for their own technicians.

Page 20 shows the exact boom wiring layout. Page 23 gives you the boom length percentage error procedure. These are the same pages a dealer would pull up. The manual covers the DS 350 GW and DS350G models with the boom control extension. If your crane is throwing an out-of-sequence warning or the LMI refuses to calibrate, you are wasting time flipping through third-party PDFs.

Boom Sequence and Ramping – Factory Procedures

Sections 6, 7, and 8 cover how the boom should extend and retract. Section 6 describes the boom sequence – the order each section moves. Section 7 maps the control flow. Section 8 explains ramping parameters. Without these, you cannot diagnose why the inner mid section locks up. The manual tells you which solenoid fires at each step. That is information no Chilton or Haynes ever printed.

Wiring Diagrams: Boom, LMI/Crane, and Turntable

Three separate wiring sections exist: boom wiring (page 20), LMI/crane interface wiring (page 21), and LMI/turntable wiring (page 22). Each uses Hirschmann’s own connector pinouts. If you have a short in the turntable slip ring, you trace it back using the terminal board layout on page 19. The central unit assembly (page 18) shows where every module lives. I have seen guys replace a $2,000 control unit when the fault was a broken wire at the boom pivot. That mistake costs you a day and a half of labor.

Troubleshooting Error Codes from Page 23 to Page 46

Boom length percentage error, main boom length error, inner mid length error, no extend/retract in automode, out-of-sequence warning – they are all here. Section 17.1 and 17.2 list operational and system error codes. Each code has a step-by-step diagnostic path. The manual tells you which sensor voltage to check and what resistance to read across the transducer. You do not guess. You follow the flowchart.

Who Needs This 49-Page Document?

This is for the shop that services Grove cranes equipped with the PAT DS350 LMI. If you are a mobile crane tech or a fleet mechanic responsible for boom extension systems, you need this. DIYers who own a DS 350 GW-equipped crane will save themselves hours of frustration. The manual does not assume you know the system – it starts with general information (page 1) and warnings (page 3) about two-block conditions and manual mode restrictions. Lifting loads in manual mode is prohibited. That warning alone could keep a rookie from bending a boom.

OEM vs Aftermarket: Why Factory Specs Matter

Hirschmann released this service manual under part number 031-300-190-042 Rev B, dated 12/05/2005. The notice on page 2 states the information is subject to change. Aftermarket copies often omit revision updates. I have seen a reprint that swapped the wire colors on the LMI interface – that will send you chasing ghosts. You get the original OEM document here, not a scan of a scan. The PDF is clean, searchable, and every page matches the factory binder.

If you work on later models, the Hirschmann iSCOUT expert compact iFLEX2 2007 Service Manual – OEM Specs covers the next generation of LMI systems. For the DS350G variant, the Hirschmann iFLEX2, iSCOUT 2007 Service Manual – OEM Factory Specs has additional wiring updates. And if you own a crane with the DS 350 GM, the Hirschmann DS 350GM 2005 Service Manual – Factory Crane Diagnostics is your backup.

Understanding the mechanical sequencing of a boom is similar to understanding a Manual Transmission in terms of gear engagement and shift timing. The same principle applies here – each section must move in order or the system locks out. That is why the manual dedicates three sections to the sequence logic. If you ever need to explain the basics to a helper, pointing them to a Manual Transmission article helps them grasp why out-of-sequence warnings matter.

Frequently Asked Questions

Does this manual cover the DS 350 G without the boom control extension?

Yes, the manual includes both the GW (wireless) and G models, though the boom control extension features are emphasized. The wiring and error code sections apply to all DS 350 variants.

Are torque specifications included for the transducer mounting bolts?

No. This manual focuses on electrical and software diagnostics. Torque values for mechanical fasteners are in the crane manufacturer’s chassis manual.

Can I print the PDF and take it into the field?

Absolutely. The file is standard PDF – print the pages you need. The binding format is A4, but it scales fine to letter.

What is the page count and year?

49 pages, published 2005. Revision B. The wiring diagrams are dated 12/05/2005.

Access the Factory Manual and stop burning billable hours on guesses. Every error code path, every connector pin, every warning message is laid out in the same language Hirschmann techs use. Your crane will thank you.