Bayerische Oberlandbahn: Obsolescence management for passenger train inspection and overhaul

Perfect Service and Back on Track

Trains not only provide maximum safety for the passengers, but also feature robust technology in order to withstand the toughest weather conditions. As the original equipment manufacturer, Bosch Rexroth manages the overhaul inspection of all hydraulic systems built into the 17 “Integral” Diesel trains of the Bayerische Oberlandbahn (BOB). Wear items are replaced and all essential components thoroughly serviced or updated – the entire process does not take longer than six weeks per train.

Bayerische Oberlandbahn (BOB) operates the picturesque, 120 km long railroad between Munich, Holzkirchen, Bayrischzell, Tegernsee, and Lenggries in Germany. The 17 Diesel trains of the “Integral” series were put into service in the early 1990s. They are currently undergoing their second overhaul inspection at the railway maintenance depot Lenggries. One train after another is disassembled into its individual parts. The hydraulic components are transferred to the Bosch Rexroth Service Center in Pasching for maintenance. They include the air-suspended, hydraulically adjustable wheel sets and the two ram cylinders, which are designed to absorb the buffer impact in case of a crash.

Service, retrofitting, and reduced life-cycle costs

The plant at Pasching attends to the procurement of original spare parts. It specializes in the repair and the field service of industrial and mobile hydraulics as well as electric drives and control systems. Bosch Rexroth’s REMAN program (“remanufacturing”) ensures reliable availability of all essential components and also provides efficient obsolescence management: parts which are no longer available can be replaced with fully compatible types. The downtime during the overhaul inspection is also used for the extensive modernization of the doors or the interior fittings of the car bodies. Repaired components have to meet the same strict testing requirements as brand-new production parts.

Tough application

Complete hydraulic system maintenance and refit provided direct from the manufacturer

Ingenious solution

Reduced downtime due to optimization of spare part availability and efficient obsolescence management


„We attach the greatest importance to minimal downtime and the fulfillment of all quality standards. Bosch Rexroth supports our activities in the best possible way.“

Roland Kerschdorfer, BOB

Solved with

  • Uniform standards for inspection processes and workshop equipment
  • REMAN program for reliable availability of key components