Inspection and repair on TACKE gearbox

This client from The Netherlands came to us with this TACKE . We inspected the gearbox and performed a repair. After a succesful testrun we shipped the gearbox back to the client.

The condition of the three gearboxes can be considered as good, no indications of bearing damage have been observed and the toothing is in good condition.

Grooves or undulations were observed on both sides of the gears. This structure comes from the production process and not a sign of damage.

Brown deposits have been detected in the gearbox 231CM11S, this is a deposit of passing rust that has formed somewhere in the gearbox. Since the gearbox is provided with sliding bearings, the only place where this could have occurred is the fit of the gear wheel on the LSS. To prevent the consequences of an incorrect fit from spreading to damage, this must be checked and corrected if necessary.

The slide bearings could only be inspected externally, so no statements can be made about the internal state. The results of oil analysis will be most suitable for recognizing damage at an early stage due to an increased concentration of zinc and / or lead. When interpreting wear particles in the oil filter, it must be borne in mind that the compressor uses the same oil flow as the gearbox.

Misalignment can cause damage to slide bearings and couplings (the cracks in the rubber of the couplings may be caused by this). Unfortunately, the correct alignment specifications are not known, but the measured values ??do not correspond to experience-based expectation. There is also no pattern in the alignment errors of the three comparable installations.

In operation a hydrodynamic lift occurs in a sliding bearing, there are also effects of thermal growth, as a result of which the measured alignment is not the operating situation. In order to correct the situation, technical documentation is required. If necessary, this can be requested from the installer. If these data can not be traced, calculating alignment specifications and thermal issues is a service offered by GBS.