Basic condition monitoring.

Ref: Implementation / Application of predictive maintenance techniques in Diesel Loco Maintenance –

Vide letter referred above, sheds were advised to introduce condition monitoring technique in diesel loco maintenance for improving loco reliability.

Identification of unusual sound in various assemblies / sub-assemblies of running locos by Supervisors & artisans by condition monitoring has still not been done in Diesel sheds. Current practice of using human ear or listening rod is grossly inadequate to identify unusual sound of various moving / rotating parts. Unusual noise is either lost or remains inaudible in cacophony of high decibel engine sound.

         

To tide over the above problem, Electronic stethoscope should be introduced in all running sections for pin pointing bearing & component noise. It includes a headset, different length probes for ease of accessibility and a pre recorded audio CD demonstrating the most common encountered troublesome engine noise. Headset allows for optimum sound quality even in very high-noise diesel loco condition.

Use of electronic stethoscope during initial & final testing of diesel locomotive, by Supervisors / artisans must be ensured for looking unusual sound especially in engine room, auxiliaries, small motors, can gear, power pack, expresser etc.