Turn the key and a high speed sound from the starter motor or a a grinding sounding which always never sounds great. One of the common occurrences is the ring gear teeth may be to worn for the pinion to engage .
We have a list below of Popular Perkins ring gear sizes and part numbers
If you look hard enough you may find the part number stamped on the old ring gear.
Email us the genuine number and we will check our stock of over 3000 Genuine Perkins parts.