GBS Gearbox Services international brand of Schaaf- en Boorwerk Rotterdam B.V.
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Inspection and repair on LOHMANN+STOLTERFOHT Pneumaflex gearbox

Inspection and repair on LOHMANN+STOLTERFOHT Pneumaflex gearbox

  • Pneumaflex
  • Input=___ rpm / ____ KW
  • NL

Scope of work:

We performed an inspection and repair on a gearbox LOHMANN+STOLTERFOHT Pneumaflex.

This client from THE NETHERLANDS came to us with this LOHMANN+STOLTERFOHT Pneumaflex. We inspected the gearbox and performed a repair. After a succesful testrun we shipped the gearbox back to the client.

Scope of work:

- Remove clutch
- Disassembly the clutch at shipyard workshop
- Cleaning al parts

Replacing parts:
- Seal ring
- Seal ring
- 4x Seal ring
- 4x O-ring (Emergency bolts)
- Reassemble clutch
- Install clutch back on board

After complete reassembly of the clutch a pressure test was performed. During this pressure test, a pressure of 8 bar was applied to engage the clutch. No leaks were observed

The travel of the liners was recorded after pressurizing and after assembly of the clutch between the propulsion gearbox and the diesel engine.


Recommended is to make a shim of 0,90mm to put between the clutch and engine together with the original spacer ring to reduce the differential between f1 and f2. This will also reduce the travel on the engine side were the maximum admissible travel is 12mm.

Every month : Check the overall condition of the clutch

Every half year : Check the thickness (travel) of the friction-linings

Every year : Check for cracks, deformation, contamination and changes of the rubber surfaces

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Location - date:

The Netherlands - June 2018

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