Fault Diagnosis: Crankshaft

The crankshaft is first examined visually to see if any of the numerous bearings are damaged. Once these bearings are considered to be satisfactory, we make sure that the crankshaft is checked mechanically for hair-line tears, which are also known as “fluxes”.

The crankshaft is fitted to 2 large current conductors and a fluid, which contains small magnetic particles, is poured over the crank shaft. If a particular current is passed through the crankshaft, the liquid works itself into small openings and can be viewed under ultra-violet light.

This clearly shows if the crankshaft is cracked and whether it can be repaired. Once the crankshaft is considered to be satisfactory by the flux machine, it is then checked on our crankshaft bench.

This machine is used to check general wear on main and driving-rod bearings. Maximum wear values have been established for this purpose, and are strictly adhered to.

When these values are exceeded, the same machine is able to re-work the crankshaft to the desired value.