A steel mill customer had a problem with heavy oil leakage from a powertrain gearbox. The customer suspected that the cardan shafts had been incorrectly installed, which could result in powertrain breakdown or cardan shaft failure. Off-Highway Powertrain Services (OHP Services) performed an alignment check to establish if the customers suspicions were correct.
In fact, OHP Services found that the cardan shafts were properly aligned and installed and were not damaged. Instead, a significant misalignment was identified in the couplings between the main gearbox and a transmission gearbox (see figure below). OHP Services, as a complete solution provider, reacted immediately on the findings to perform a corrective alignment procedure on this complex powertrain the very next day. This was a technically difficult alignment since the main gearbox is a fixed, immovable installation. Therefore, the transmission gearbox needed to be adjusted, whilst at the same time it was essential to maintain the cardan shafts in alignment. The customer was also informed that the effect of the thermal growth in the powertrain must be considered to prevent possible misalignment when the powertrain is in normal operation.
One of our specialists monitored the production process during a work shift to check for thermal growth in the powertrain and was able to adjust for this factor during the alignment process.