Hello, I need to replace the starter drive pinion on my 1953 Oliver Diesel OC6 Crawler. My OC 6 parts book lists a Delco Remy part number of 1914341 (Oliver p/n 1K-7716-A) for the pinion drive assembly. On the internet the assemblys compatible with 1914341 have a 12 tooth pinion, however my crawler has a 13 tooth pinion. So I am curious if any folks with a OC6 Diesel or a 77 Diesel can tell me how many teeth their starter pinion has. I am wondering if possibly this crawler which had a rough life in west Texas, pushing a 10 foot blade, may have had an incorrect pinion put on as it was quite chewed up. I have it running as of a couple of years ago after replacing rod journal bearing, rings, putting in a clutch and a few other things, but have only ran it a total of less than 10 hours. Thanks for any info folks can pass along. FYI the Pinion itself is Delco Remy p/n 1911629 (Oliver p/n 1K-7889). Additionally I thought an Oliver p/n with a K meant it was from an 88 model. Thanks for any info you can pass along.