Workshop tips for Bosch CV steering system replacement
Bosch has issued advice for workshops on the replacement of its CV steering systems.
“Due to their safety-relevant nature, steering systems are mostly maintenance-free and designed to last for the complete vehicle life cycle,” said Bosch.
“Of course, attachment parts can be damaged or worn out and should then be replaced. However, complete steering systems usually only need to be replaced in the event of an accident or mechanical overloads affecting the steering function.
“When working on steering systems, comprehensive visual and functional inspections are always the first step. For this purpose, operating forces, resetting, clearances, noises and the warning lamp are checked.
“Workshops using ESI[tronic] truck software will find comprehensive service and installation instructions included within the SIS module. They provide information concerning troubleshooting on electrical and mechanical systems. Afterwards, an additional in-depth diagnosis is performed to determine whether a steering system needs to be replaced or if it can be repaired.”
The following points should always be observed, says Bosch.
“Install steering components exactly as instructed in the installation manual.
“Only attachment parts approved by the manufacturer, such as pumps, working cylinders, or steering shafts, should be used.
“Attachment parts must be installed properly to prevent consequential damage (e.g., corrosion).
“During maintenance or when replacing steering gears or steering system components such as pumps and working cylinders, the hydraulic steering system should be flushed and the fine-mesh filter replaced
“After a replacement, professionally fill and bleed the system with hydraulic oil, see list of lubricants TE_ML08 and TE_ML09.
“Only use hydraulic oils approved by the manufacturer.
“After installation, it must be ensured that the warning lamp is off and the fault memory is cleared.
“Finally, perform a test ride on non-public grounds to check the steering system’s proper functioning.
“Recommended service intervals are 600,000 km for long-haul vehicles, and 300,000 km or 7,500 operating hours for buses and short-haul vehicles.
“Installation and service manuals are available for many steering components.”
