Description

Hirschmann TMS870, TTS870, RT865BXL 2006 Service Manual – Factory Wiring and Boom Control Diagnostics

You’re chasing a boom length error on a TMS870 or TTS870 and you’ve got a multimeter in one hand and a cup of coffee in the other. The aftermarket wiring diagrams you obtained are useless – they skip the LMI terminal board pinouts. I’ve been there. This Hirschmann TMS870, TTS870, RT865BXL 2006 Service Manual from Hirschmann Electronics is the only document that gives you the factory schematic and the step-by-step troubleshooting logic for the DS 350 G boom control system. 76 pages of actual OEM data, not some third-party rehash. Every wire color, every connector pin, every error code is printed where it belongs – right next to the procedure that uses it.

Wiring Schematics for TMS/TTS870 and RT865BXL

Section 11.1 lays out the complete wiring schematic for the TMS and TTS870. Section 11.2 covers the RT865BXL. These are not generic diagrams – they show the exact harness routing, the LMI central unit (751) connections, and the terminal board on the DS 350 G. Need to find the charge pressure signal wire? It’s on the schematic. The manual also includes the LMI Central unit pinout in section 10.1 and the Terminal board in 10.2. If you’re swapping a boom control interface or chasing a short, you need this level of detail – aftermarket manuals leave out the ground paths and shield connections.

Boom Length Percentage Error: Where to Start

Section 12 – Boom Length Percentage Error – gives you a diagnostic tree that starts with the transducer adjustment procedure from section 9.2. The manual doesn’t assume you know which sensor is failing. It walks you through the percentage error calculation, the expected voltage range, and the mechanical checks for the length transducer. I’ve seen techs replace a perfectly good transducer because they didn’t check the superstructure component alignment first. The factory procedure saves you that wasted swap.

3 Critical Warnings Before You Start

Section 3 of the manual lists the safety warnings for working on the DS 350 G system. One that stands out: the load moment indicator is not a substitute for operator judgment – it’s a tool. The manual also warns about electrostatic discharge when handling the LMI central unit. If you skip this page, you risk frying a $2,000 board. Section 2 gives you the list of reference materials you should have on hand: the crane’s load chart, the boom alignment specs, and the OEM wiring color codes. Don’t start without them.

Does This Manual Cover Error Code Lookups?

Section 18 – Error Codes – lists the diagnostic trouble codes for the DS 350 G boom control. Each code includes the symptom, the probable cause, and the specific section to turn to for the fix. For example, code 0335 (percentage error) sends you to section 12. The manual is cross-referenced the way factory books are – not a random number dump. Troubleshooting a boom length error isn’t like diagnosing a Manual Transmission – you need the electrical schematic and the sequence logic. The manual gives you both.

Service and Maintenance – DS 350 G Component Setup

Section 4 covers routine service and maintenance intervals for the boom control interface. Section 9.1 details the boom components and setup for the DS 350 G, including the torque specs for the transducer bracket bolts. Page numbers are cited in the table of contents for quick reference. If you’re working on the superstructure, sections 9.3 and 9.4 break down the TMS/TTS870 and RT865BXL differences – the mounting brackets and harness routing are not identical between models.

Why OEM Specs Matter for Load Moment Indicators

This manual is the original Hirschmann publication, revision D dated 2/16/06. It’s not a photocopy or a third-party scan – it’s the same binder the dealer techs used. The wiring schematics in sections 11.1 and 11.2 are drawn to Hirschmann’s standards, with traceable component numbers. I’ve seen aftermarket manuals show the wrong pinout for the LMI terminal board – that’ll burn a wire or blow a fuse. With the factory book, you get the exact test points for the central unit and the correct ramp settings from section 8. If you’re used to working on a Manual Transmission, the electrical logic diagrams in this manual will be new territory – but they are laid out step by step.

If you need the manual for the next generation system, check out Hirschmann iSCOUT expert compact iFLEX2 2007 Service Manual – OEM Specs. For the iFLEX2 and iSCOUT 2007 manual, see Hirschmann iFLEX2, iSCOUT 2007 Service Manual – OEM Factory Specs. The DS 350GM 2005 manual is also available at Hirschmann DS 350GM 2005 Service Manual – Factory Crane Diagnostics.

Frequently Asked Questions

What models does this manual cover?

It covers the Hirschmann TMS870, TTS870, and RT865BXL with the DS 350 G boom control system.

Does it include torque specs for the transducer bracket?

Yes. Section 9.2 – Length Transducer Adjustment – lists the fastener torque. The manual also includes torque values for the LMI central unit mounting screws.

Can I use this manual for the DS 350 on other crane models?

Not directly. The superstructure components and wiring schematics are specific to the TMS/TTS870 and RT865BXL. Using it on a different model could lead to incorrect pin connections or error code misinterpretation.

Is the wiring schematic for both TMS/TTS870 and RT865BXL in the same manual?

Yes. Section 11.1 covers the TMS/TTS870 wiring; section 11.2 covers the RT865BXL. The LMI central unit wiring is common, but the harness routes differ – the manual shows both.

You need the right data the first time to keep that crane working. Access the Factory Manual from AutoRepairManuals and get the correct values – not a guess.