- It is Maximum total axial gap of the steam path of the turbine Cylinders . Normally carried out for HP& IP Cylinders
- It is measured by moving the entire rotors from the zero position on either side.( Zero position is Rotor collar on the working thrust pads in LMZ turbines and Rotor collar in the 50% float Position of the thrust Bearing in KWU Machines)
- The Reading is taken by Dial Gauges
- Total sum of the Left and right movement is the BUMP Value.