4.1.1 The individual jacking gear units are to be designed such that each unit
                                 can be removed separately for inspection, maintenance and repair. Adequate
                                 arrangements for dismantling, including lifting devices, are to be provided.
                              
                              
                              
                            
                           
                           
                           
                              
                              
                              4.1.2 Unless otherwise agreed, all gearing, except the main climbing pinion,
                                 are to operate in oil bath enclosures. Main pinions and racks are to be supplied
                                 with a suitable lubricant during all jacking operations.
                              
                              
                              
                            
                           
                           
                           
                              
                              
                              4.1.3 Adequate inspection openings are to be provided to enable the teeth of
                                 pinions and gear wheels, and their attachment to the shafts, to be readily
                                 examined.