TRACTOR MECHANIC WEEK WISE NSQF SYLLABUS (SPILT UP)

WEEK. NO. 19 

1. Reference Learning Outcome :-Overhaul Diesel Engine of Tractor. (NOS:AGR/N1128)
2. Duration :- Professional Skill 77 Hrs.; Professional Knowledge 16 Hrs.(for above learning out come)

TRADE THEORY (Professional Knowledge ) :- 

• • Engine Components – working principle & construction of cylinder heads, types of combustion chambers.
  • Function of Engine Valves, different types, materials, Type of valve operating mechanism.
  • Importance of Valve seats & inserts, importance of Valve movement, Valve stem, oil seals, Valve-timing diagram and concept of Variable valve timing.

TRADE PRACTICAL (Professional Skills  With Indicative Hours) :- Job no. & Name of the Practical

• 35. Remove cylinder head from engine. (5 hrs.)
• 36. Overhauling of cylinder head assembly with use of service manual for clearance and other parameters. (11 hrs.)
• 37. Practice on removing rocker arm assembly manifolds, fitting of valve guide. (11 hrs.)

WEEK. NO. 20 

1. Reference Learning Outcome :-Overhaul Diesel Engine of Tractor. (NOS:AGR/N1128)
2. Duration :- Professional Skill 77 Hrs.; Professional Knowledge 16 Hrs.(for above learning out come)

TRADE THEORY (Professional Knowledge ) :- 

• • Description of Cylinder block, Cylinder block construction, types of cylinder blocks & cylinder liners.
  • Description & functions of different types of pistons, piston rings and
    piston pins and materials.
  • Used recommended clearances for the rings and its necessity precautions while fitting rings, common troubles and remedy.

TRADE PRACTICAL (Professional Skills  With Indicative Hours) :- Job no. & Name of the Practical

• 38. Cylinder block overhaul. (5 hrs.)
• 39. Measurement of cylinder liner & crankshaft for ovality and taperness. (5 hrs.)
• 40. Overhauling piston and connecting rod assembly with use of service manual for clearance and other parameters. (10 hrs.)
• 41. Practice on removing oil sump and oil pump – clean the sump. (5 hrs.)

WEEK. NO. 21 

1. Reference Learning Outcome :-Overhaul Diesel Engine of Tractor. (NOS:AGR/N1128)
2. Duration :- Professional Skill 77 Hrs.; Professional Knowledge 16 Hrs.(for above learning out come)

TRADE THEORY (Professional Knowledge ) :- 

• • Description & function of connecting rod, importance of big end split obliquely, Materials used for connecting rods big end & main bearings.
  • Shells piston pins and locking methods of piston pins.
  • Recommended clearances for the cylinder liners & rings.
  • Bearing failure & its causes- care & maintenance.
  • Description of crankshaft & Camshafts.
  • Types of their drives.
  • Description of Overhead camshaft, importance of Cam lobes.
  • Crankcase ventilation (PCV).
  • Camshaft, Crank-shaft balancing, Firing order of the engine.
  • Description and function of the fly wheel and vibration damper.
  • Timing mark

TRADE PRACTICAL (Professional Skills  With Indicative Hours) :- Job no. & Name of the Practical

• 42. Practice on removing the big end bearing, connecting rod with the piston. (2 hrs.)
  43. Practice on removing the piston rings, Dismantle the piston and connecting rod. (5 hrs.)
• 44. Check the side clearance of piston rings in the piston groove & lands for wear. (3 hrs.)
• 45. Check piston skirt and crown for damage and scuffing, clean oil holes. Measure -the piston ring close gap in the cylinder, clearance between the piston and the liner, clearance between crank pin and the connecting rod big end bearing. (2 hrs.)
• 46. Check connecting rod for bend and twist. (3 hrs.)
• 47. Setting of Connecting rod big end & main bearing. (2 hrs.)
• 48. Assembling crank shaft, main bearings, connecting rods and piston assembly in the engine, fitting cylinder head. (5 hrs.)
• 49. Setting valve timing. (3 hrs.)