Manual transmissions- Function, description, types and their application.
Gearbox layout.
Components of tractor gear box.
Principle of epicyclical gear box.
Necessity of torque convertor, need of 4 x 4-wheel drive / Front wheel drive, Low & high gear ratio, universal joint and propeller shaft.
TRADE PRACTICAL (Professional Skills With Indicative Hours) :- Job no. & Name of the Practical
70. Dismantle clutch assembly. (4 hrs.)
71. Inspect the parts of clutch. (2 hrs.)
72. Relining of clutch plate & assemble. (3 hrs.)
73. Coupling the clutch with flywheel & join the engine with gear box. (5 hrs.)
74. Adjust clutch pedal free play. Dismantle gear box of a tractor & inspect the parts. (5 hrs.)
75. Assemble the gear box. (5 hrs.)
76. Overhauling Transfer case and auxiliary gear box. (4 hrs.)
WEEK. NO. 28
Reference Learning Outcome :- Overhaul Differential and PTO Unit of Tractor in the workshop.
Duration :- Professional Skill 28 Hrs.; Professional Knowledge 07 Hrs.(for above learning out come)
TRADE THEORY (Professional Knowledge ) :-
Final Drive & Drive Shafts Differential carriers double reduction gearing, differential lock, crown wheel and pinion adjustments, function and types of power take off (PTO) mechanism.
Types of front & rear axles. Common trouble and their remedies, care and maintenance.
TRADE PRACTICAL (Professional Skills With Indicative Hours) :- Job no. & Name of the Practical
79. Servicing of PTO (Power Take Off). Measure rpm of PTO shaft & speed of belt pulley. (11 hrs.)
WEEK. NO. 29 & 30
Reference Learning Outcome :-Overhaul Steering System of Tractor in the workshop. (NOS:AGR/N1129)
Duration :- Professional Skill 80 Hrs.; Professional Knowledge 15 Hrs.(for above learning out come)
TRADE THEORY (Professional Knowledge ) :-
Steering Systems-
Function and types of steering system.
Description, construction and function of mechanical steering system steering wheel, steering gear box, tie-rod, arms link, ball and socket joints etc. their movement and adjustment.
Description and mechanism of foot steerage pedal as incorporated in tractors. Description, working and principle of hydraulic steering system.
Different parts such as pump, distributor valves, pipe line and hoses etc.
Development of mechanical framing.
Use of Power tiller, Tractor & Bulldozer, Chassis frame of tractor
TRADE PRACTICAL (Professional Skills With Indicative Hours) :- Job no. & Name of the Practical
80. Checking, Layout of Mechanical steering system. Checking/ Inspection of Steering linkage and necessary repair. (6 hrs.)
81. Remove steering wheel. Overhauling of steering gear box of tractor. (5 hrs.)
82. Remove front axle and spindle hub and steering linkage. (6 hrs.)
83. Reassembling steering assembly and Test for correct function. (6 hrs.)
84. Checking, inspect layout of different parts of Hydraulic steering system. (11 hrs.)
85. Practice on visual Inspection of chassis frame for crack, bent and twists. (6 hrs.)
86. Overhauling and Inspection of shackle, front & rear suspension. (10 hrs.)
87. Lubricating a suspension system. (6 hrs.)
WEEK. NO. 31
Reference Learning Outcome :-Carryout Repair of Wheels and Tyres of Tractor in the Workshop. (NOS:AGR/N1129)
Duration :- Professional Skill 28 Hrs.; Professional Knowledge 05 Hrs.(for above learning out come)
TRADE THEORY (Professional Knowledge ) :-
Wheels & Tyres- Description, construction and function of Wheel.
Rim sizes.
Types & sizes of tyres.
Solid, pneumatic & Radial.
Ply rating. Tyre materials, Tyre information, Tyre tread designs, Tyre ratings for temperature & traction.
Importance of in-Flatting tyres to correct pressure.
Repair and maintenance of tyres and tubes.
Storage of tyres.
Descriptions Tire wear Patterns and causes Nitrogen vs atmospheric air in tyres.
TRADE PRACTICAL (Professional Skills With Indicative Hours) :- Job no. & Name of the Practical
88. Remove wheels from tractor. (4 hrs.)
89. Dismantle wheel for checking rims, tyres for wear and tubes for leaks. (5 hrs.)
90. Repairing, de-rusting, painting. (5 hrs.)
91. Fitting of tyres and tubes on rim & inflate to correct pressure. (5 hrs.)
92. Balancing of Tractor wheels. Practice of tyre rotation. Fitting wheels on tractors. Tightening of wheel in correct sequence. (5 hrs.)
93. Checking & adjusting tire pressure by use of air or by Nitrogen. (4 hrs.)