Craftsman LT1000 Manual. The Sears Craftsman LT1000 is a riding mower. View the Craftsman LT1000 Manual below. The model LT1000 is an entry level riding lawn mower. If you need Craftsman LT1000 parts, we suggest using Repair Parts Direct. If you need to know how to change the oil in the LT1000 or how to replace the spark plug, the LT1000 manual below will show you.