Spare Parts

Tunnel Service Group GmbH takes pride in providing all spare parts for a Herrenknecht AVN slurry machine system. We offer basically everything that one may need for a Herrenknecht slurry machine and its steering container or system components such as jacking frames, pumps, separations, tunnel powerpacks and hydraulic and electrical lines.

Product Range

To name a few exemplary items - for everything else, ask us directly:

  • WIKA slurry sensors, including wear-resistant and ground pressure sensors
  • Seal sets and seal wear rings for machine main bearings
  • KONTRON and PLC S5 components
  • Hydraulic pumps for steering container and powerpack
  • Hydraulic blocks and valves for machines and containers
  • Hydraulic motors and WIKA sensors
  • Gate and ball valves for slurry circuit, including steelworks
  • Components for electrical cabinets in containers and powerpacks
  • Siemens, Beckhoff and WAGO original components
  • Schneider Telemecanique and Siemens VFD
  • Wear parts and spares for slurry pumps by Habermann, Warman and KSB
  • and much more...


Our idea is to keep a base stock of everything that may be needed in technical emergency situations, so we can react quickly if a customer has a problem. Therefore we have a two-storey storage with wear parts and spares for microtunneling machines. For bigger requests we have placed call-off orders with our suppliers, being able to cope also with large order volumes in short delivery time.


We at Tunnel Service Group GmbH produce own components. Not only main components but also electronic, hydraulic or steel spare components. Each and every part is fully compatible with the Herrenknecht AVN system and is tested and sealed before storage or packing. Examples are the 37-pin electrical connecting boxes for the machine signals, shaft remote controls, bentonite stations or PLC grease controls for slurry pumps.

Some things have to be made by specialist companies. In these cases we work together with most of the suppliers of the market leaders, being able to provide you with OEM quality at an affordable price range. Our call-off orders allow us to offer an attractive prizing as well as short delivery times in case something should be out of our own stock.