Part Number: Deere TM1975. Model: LT150, LT160, LT170, LT180 Lawn Tractor. Which Manual do I need for my John Deere LT150, LT160, LT170, LT180 Lawn Tractor?. Technical/Service Manual – Detailed guide for diagnosing, testing, and repairing the John Deere LT150, LT160, LT170, LT180 Lawn Tractor, providing essential service information.