Inspection and repair on ZOLLERN ZHP 4.25 gearbox

This client from Poland came to us with this ZOLLERN ZHP 4.25. We inspected the gearbox and performed a repair. After a succesful testrun we shipped the gearbox back to the client.

This page provides an overview of the inspection a ZOLLERN planetary winch gearbox.

The gearbox was sent to the GBS International workshop to carry out the inspection. All findings are listed here.

The working parts of the gearbox are in good condition, gears and shafts can be re-used, as well as the planetary gear bearings. Other bearings should be replaced.

Other small repairs and deliveries:

- Cleaning and flush planetary bearings (re-used)
- All internals (sun gears, planetary gears and gear rings) show minor marks on working flanks, remove manually
- Machining bearing covers for the new bearings. (axial clearance)
- Gearbox should be externally painted (see picture)

The grease found in the gearbox is most likely there from assembly in the factory, as the gearbox and clutch are filled with lubrication oil.

Recommendations:

Used oil should be in correspondence with the “schierstoffempfehlung” (lubrication recommendation) found in the gearbox manual.