Tractor engines – Engine operation-Understanding the working principle of a Diesel engine - 4 Stroke compression- Ignition engine cycle-Inlet and Outlet valves– Valve timing diagram- Engine efficiency - Engine operating cycle -Firing order –Firing interval - Combustion chambers – Construction details of engine blocks, Cylinder head and Crankcase - Features of cylinder , Piston, Connecting rod and Crankshaft.
Lab Experiments:
Hand tools used in garage-fault diagnosis. Study of valve and valve actuation systems
Air and fuel supply-air cleaner- Fuel pump- Exhaust– Silencer. Cooling and lubrication system- Starting and electrical system-Transmission system-clutches, brakes, power train- transmission- Gears- Types of high and low gears transmission- Gearbox- Differential and final drive mechanism- Engine governing
.Steering geometry– Steering systems- Front axle and wheel alignment Brake– types.
Lab Experiments:
Study of tractor engine systems using a working model of a tractor engine
Piston and cylinder-inspection – reconditioning and assembly of cranking system.
Tractor PTO, Belt-pulley, properties of Hydraulic fluids- Hydraulic system -hydraulic couplings, Torque convertors- Hydraulic circuits- position and draft control- Weight transfer-theory of traction- Tractive efficiency–Tractor chassis mechanics- Stability- longitudinal and lateral .Controls- visibility–operator’s seat.Tractor Hitching.
Lab Experiments:
Study of fuel system assembly and adjustment
Study of lubricating system components.
Power tiller-Special features-Clutch-Gearbox-Steering and brake. Makes of tractors and power tillers. Types of tests-test procedure- Need for testing & Evaluation of farm tractor–Test codes for performance testing of tractors and power tillers. Cost of operation of tractors and power tillers.
Lab Experiments:
Study of cooling system components.
Study of transmission system-assembly of gearbox, differential and final drive
Ergonomic aspects of tractors and power tillers- Substitution of fossil fuels with Biofuels to protect the environment from GHG pollution-case studies on EV tractors.
Lab Experiments:
Study of brake and its adjustment-Steering system– assembly and adjustment-wheel tread Adjustment Study of Tyres, Rims and Balancing methods of a tractor
Visit to tractor/power tiller manufacturing companies
Reference Book:
1. S.C.Jainand C.R.Rai, Farm tractor maintenance and repair. Standard publishers and distributors
,NewDelhi, 1999.
2. Jagadishwar Sahay, 1992. Elements of Agricultural Engineering. Agro book agency, Patna – 20.
3. Ralph Alcock, 1986, Tractor implement system. AVI Pub, co., Inc. West poert, Connectient.
4. Sreevastave, A.C., 1990. Elements of Farm Machinery, Oxford and IBH Publication Co. New Delhi.
5. Mechanic Tractor, February 2016, Sector: Automobile, Common for Mechanic Tractor/ Mechanic Agriculture Machinery, Trade Practical, Developed by National Instructional Media Institute, Directorate General of Employment & Training, Ministry of Labour & Employment,
Government of India, Chennai.
Text Book:
1. Sanjay Kumar, 2007, A TEXT BOOK OF TRACTOR AT A GLANCE, International book
distributing company, Lucknow.
2. R.K. Veera Selvam, Farm Machinery and Power, Oxford Book Company, 2010,ISBN 10:
9380179634 / ISBN 13: 9789380179636
3. Barger, E.L., J.B. Lilijedahl and E.C. Mc Kibben, 1997. Tractors and their power units. Wiley
Easterb Pvt Ltd, New Delhi
4. Nakra C.P 1970. FARM MACHINERY AND EQUIPMENT: Dhanpat Rai Publishing Company
