So for that Serial Number the Service Manual is Caterpillar Publication reference REG00507. Here’s one on eBay. Caterpillar CAT No. 12 No. 14 Motor Graders Repair Service Manual REG00507 | eBay The item you are looking at is a used Caterpillar CAT No. 12 No. 14 Motor Grader Repair Service Manual. Normal Wear and Tear from use. This book is dirty from use. Item is sold as is. Not the manual you are looking for?. www.ebay.com The Parts Manual is Publication reference UE070111 which covers all 13K machines up to Serial Number 5286, which includes your machine. Again here’s one for sale on eBay. Both are from the same seller. CAT Caterpillar No. 12F Motor Grader Parts Manual UE070111 1980 | eBay The item you are looking at is a used Caterpillar CAT No. 12F Motor Grader Parts Manual. Normal Wear and Tear from use. This book is dirty from use. Item is sold as is. Not the manual you are looking for?. www.ebay.com