On-site Inspection and repair on WGW AA-SCZ-600/2/S gearbox

This client from THE NETHERLANDS came to us with this WGW AA-SCZ-600/2/S. We inspected the gearbox and performed a repair. After a succesful testrun we shipped the gearbox back to the client.

The state of the gearbox can be considered acceptable.

All pinions are stamped and show forms of micropitting. However, this micropitting is not yet in an advanced stage. Micropitting is a phenomenon that occurs on hardened gears. Several factors influence this, including surface roughness, lubrication and tooth maturation. The damage is characterized by a matt and gray discolouration of the surface due to surface weakening. Micropitting can be stabilized or progressive, in the latter case it can develop into pitting, peeling and peeling.

There are not many details on the bearings either, apart from some slight wear on some bronze cages. The sweating of the ingoing seal probably indicates a slightly run-in sealing surface. This overall picture does not give a reason to reject the gearbox in the short term.

It is recommended to:

- Carry out a visual inspection in a year to see if the micropitting is stabilized or progressive
- Carrying out annual oil analyzes, this is a good indication of whether wear is taking place in the cabinet
- In order to solve the leakage along the dividing bolt, the upper cap must be lifted in order to apply new liquid gasket. At that time, the state of the drilling can also be viewed
- With the top cover removed, the incoming seal could also be replaced. The seal face could be lasercladded, or the seal could be moved so that it seals on another piece of the shaft.