standards / manuals / guidelines for small hydro development - AHEC

6. Oil Leakage Unit:i) Check any leakage from pipe line jointsii) Check its satisfactory running on ‘Auto’.7. Top Cover Drain System:i) Main supply of ‘ON’ for DPM.ii) Vibration noise in the pump motor.iii) Any leakage form the water pipingiv) Working and water pressure of the ejector.8. Centralised Grease Lubrication System:i) Check for any leakage from grease pipes, unions and nipples.ii) Check grease container rand fill grease, if required.9. Oil Header: (For Kaplan)i) Check from perpex sheet manhole any splasing of oil from top and bottom bush.ii) Check any oil leakage from the jointsiii) Note the pressure difference of opening and closing side of runner.10. Oil Pressure System:i) Check if there is any abnormal sound in the running of the motor and pump unit ofOPU.ii) Check the oil level in pressure accumulator.iii) Check any oil leakage from oil piping and its valve.iv) Check for over heating of motor.v) Note the timing of OPU pumps running and compare with previous day runninghours.11. Mechanical Cabinet of Governor:i) Pressure in transducer.ii) Check any oil leakage from joints of piping.4.1.2 Weekly Maintenance Checks1. Greasing of guide vanes and servomotor with centralized grease lubrication systemand manually.i) Oil in the gear box shall be checked.ii)iii)Check for any leakageWorking of end pressure relay and solenoid valves, if defective, should bereported.2. Cleaning of OPU filters.3. Cleaning of throttle filters in the governor mechanical cabinet.4. Cleaning of governor compressor air filters and checking of oil levels.5. Checking physically oil of OPU of the running machine, after taking sample throughthe sampling cock, do the crackle test for detecting presence of water. Take remedialmeasures.6. Check oil level of all the bearings7. Check wobbling of shaft at coupling flange and at oil header servo tube.AHEC/MNRE/SHP Standards/ E&M Works – Guidelines for Operation and Maintenance of Small Hydropower Station 18