AI25405 Tractors and Farm Engine Systems – Semester IV – Agri – R-2025

Subject Code & Name: AI25405 – Tractors and Farm Engine Systems

Regulation: R-2025

Semester: IV (Fourth Semester)

Branch: B.Tech. Agricultural Engineering (Agri)

Credits / L-T-P: 4 Credits | L-T-P: 3-0-2

Course Objectives

• To impart knowledge on the construction, operation and performance evaluation of tractors, power tillers and earth moving equipment used in agriculture.

Full Unit-wise Syllabus

Unit I – Tractor Engine and Engine Systems

Classification of tractors; construction and working of IC engines and components - Air, fuel, cooling, lubrication, and electrical systems with valve timing concepts.

Practical: 1. Study of engine components (diesel and petrol) and Dismantling and assembly of diesel engine.

Unit II – Transmission, Steering and Braking Systems

Transmission systems – clutch, gear box (sliding mesh, constant mesh and synchromesh); differential, final drive and wheels; steering geometry and steering systems; front axle and wheel alignment; braking systems – types and working principles.

Practical: 2. Study of clutch and gearbox systems, steering, differential, and braking systems

Unit III – Hydraulic Systems and Tractor Performance

Hydraulic systems – working principles, hydraulic pumps and control valves; three-point linkage; draft and position control; weight transfer; theory of traction and tractive efficiency; tractor chassis mechanics; longitudinal and lateral stability; operator controls, visibility and ergonomics; Power Take Off (PTO) system.

Practical: 3. Study of hydraulic system and three-point linkage mechanism – draft and position control operation. 4. Determination of tractor tractive efficiency / demonstration of weight transfer and traction characteristics.

Unit IV – Power Tillers, Bulldozers and Tractor Testing

Power tiller – special features, clutch, gear box, steering and braking systems; makes of tractors, power tillers and bulldozers; bulldozer – salient features, turning mechanism, track mechanism and operations; tractor and power tiller testing – types of tests, need for testing and evaluation; test codes for performance testing as per BIS/IS standards.

Practical: 5. Study of power tiller systems and tractor testing procedures

Tasks

• Design and analyze a tractor subsystem (engine, transmission, or hydraulic system) with detailed component study, working principles, and performance evaluation.
• Conduct a study (experimental/demo/data-based) on tractor performance such as tractive efficiency, fuel consumption, or PTO performance and interpret the results.
• Prepare a detailed report based on a field visit/workshop study covering tractor systems, power tillers, or bulldozers, including testing procedures and scope for improvement.

Course Outcomes (COs)

• CO1: Explain the construction and working of tractor engines and associated systems.
• CO2: Analyze transmission, steering and braking systems of tractors.
• CO3: Evaluate hydraulic systems, traction performance and stability of tractors.
• CO4: Assess performance of tractors, power tillers and bulldozers using standard testing procedures.

Assessment Pattern (Quick Note)

• Weightage: Continuous Assessment 50% | End Semester Examinations 50% Methodology for Continuous Assessment: Quiz (5%), Project (15%), Assignment Programs (25%), Practical (25%), Internal Examinations (30%)

Source: Official Anna University – B.Tech. Agricultural Engineering R-2025 Syllabus
Last Updated: October 2026