1. Problem Identification

For today, we have prepared a small Case Study from our hydraulic workshop. The client was concerned about a problem with the machine drive, in this case it was a crawler dozer from the well-known construction equipment manufacturer Liebherr with the model designation PR722.

The diagnosis of the hydraulic system showed that the drive motor was responsible for the problem, so it was brought to the workshop for detailed verification. The hydraulic motor - BMV135 was disassembled into parts by mechanics and carefully examined for potential faults.

This time it turned out that the fault is quite obvious - a broken piston. This type of problem is quite common in pumps or hydraulic motors, but it is not necessarily always the main cause of the entire subassembly failure.

Our workshop crew did not stop at this finding and undertook further inspections, which allowed for a full diagnosis, namely, that the motor was already in poor physical condition after a long period of operation.

Clear signs of wear and tear of the entire component made it clear that the lifespan of the basic parts of the engine is coming to an end.

2. Proposed Solutions

However, this does not mean that the engine cannot be repaired, but often the cost and effort significantly outweigh the profitability of such a repair. In such a case, our offer includes the option to purchase an identical model of the engine from our warehouse stocks. We really often have exactly the same model of engine or pump in stock as the one delivered by the customer for verification.

The situation was presented to the client in the offer and he finally decided to purchase a Linde BMV135 engine from our warehouse. In this way, we try to objectively present the situation and give the client the opportunity to choose the best solution for him.

The choice between repair and purchase of another device is always an individual analysis of technical, financial and also time issues, because a longer machine downtime directly affects the generation of further losses, and no machine owner needs to be explained this twice.

3. Summary

In the discussed example, the client, fearing a longer downtime, decided to purchase the proposed BMV135 engine from our warehouse. The model delivered to our workshop was designated for cleaning and the parts suitable for further operation will serve as a base for building another engine.