Reference Learning Outcome :-Overhaul Diesel Engine of Tractor. (NOS:AGR/N1128)
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
Reference Learning Outcome :-Overhaul Diesel Engine of Tractor. (NOS:AGR/N1128)
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
Reference Learning Outcome :-Overhaul Diesel Engine of Tractor. (NOS:AGR/N1128)
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.)