This operator's manual covers the New Holland TC40DA and TC45DA models, compact utility tractors designed for small farms, landscaping, and property maintenance. These 4WD diesel tractors, likely produced in the early to mid-2000s, offer versatility and reliability, building on New Holland's extensive heritage in agricultural machinery. The TC series is recognized for its robust construction and efficient operation, making it a dependable choice for a variety of tasks. This manual provides comprehensive guidance for tractor operators and owners, focusing on safe and efficient operation, routine maintenance, and basic troubleshooting. It details controls and instruments, lubrication points and procedures, scheduled maintenance tasks, and safe startup, operation, and shutdown protocols. The content is designed to help users understand and maintain their New Holland TC40DA or TC45DA tractor, ensuring optimal performance and longevity.