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Basic and working knowledge of principles & operation with full knowledge on

maintenance, repair and overhauling of following assemblies / sub-assemblies used

in Heavy Earth Moving Machinery (HEMM):

1. Internal Combustion Engine :

Difference & application of S.I. and C.I. Engines, Combustion Process in C.I. Engines.

Cylinder Arrangement, Firing Order, Fuel Injection, Fuel Consumption.

Performance, Mechanical Efficiency & Output (Horse Power- IHP & BHP).

Cooling, Exhaust & Lubrication System of C.I. Engines.

Daily /Periodical Maintenance Methods of C.I. Engines, Applicable In HEMM

2. Gear Box:

Type and Functions of Gear Box.

Difference between Gear Box and Torqmatic Transmissions

Daily/Periodical Maintenance Methods of Gear Box & Torqmatic Transmissions in

HEMM.

3. Differential / Final Drives: Methods & operation and propagation of power

through Differential/Final Drives.

4. Clutch System:

Types of Clutch System - Mechanical/Hydraulic. Function & Method / operational

principal of different type of Clutch System.

5. Brake System:

Type & application of different types of Brakes available in HEMM - Air over

hydraulic or pneumatic or disc type.

Function & Method / operation of different Brake System and its Daily / Periodical

maintenance method.

6. Steering / propel System:

Working of different steering / propel system used in HEMM - Mechanical/Hydraulic assisted.

7. Crawler Drive:

Operation of Crawler mechanism, Track chain, Sprocket idlers, track / carrier rollers and their

maintenance

Method of track tensioning arrangement etc.

8. Tyres :

Off the Road Tyres (OTR) - Types & Sizes of OTR tyres used in HEMM

Types of failure of tyres & its possible reasons, checking & maintenance of Off the

Road Tyre

Tyre handling equipment- Operation & use of Tyre handling equipment.

9 . Air Compressors:

Functional difference & Application of reciprocating, rotary, screw type compressors

fitted with different HEMM.

10. Hydraulic System:

Basic working of Hydraulic System in different HEMM including hydraulic pump,

motor, cylinder, Valve and their maintenance.

11. Hoist/Swing/Propel Systems in Excavator/Draglines:

Basic Function & Working of Hoist / Swing / Propel Systems in Excavators/Dragline.

Daily/Periodical maintenance methods of Hoist / Swing / Propel Systems in

Excavators / Dragline.

12. Crowd System in Excavators:

Function & Working of Crowd System in Excavator.

Daily / Periodical maintenance methods of Crowd System in Excavators

13. Rotary and Feed System in Blast hole Drills:

Operation & Working of Blast Hole Drills.

Capacity and sizes of Blast Hole drills in use in Open cast Mines of CIL.

Function of Rotary, feed and dust suppression systems.

Drill Rod sizes used in Open Cast Mines of CIL.

Daily /Daily /Periodical maintenance methods of Rotary Blast Hole Drills

14. Drill Bits : Different types & Sizes of Drill bits used in Open Cast Mines of CIL.

15. Lubricants:

Application of different type and grades of Lubricants and Grease used in HEMM.

16. Wire Rope:

Construction & sizes of Wire Ropes required for different application in Draglines and

Rope shovels in use in CIL.

17. Welding Equipment:

Type of Welding & Cutting processes and their application.

Type of Electrodes.

18. Workshop Equipment:

Application of various service tools like Pneumatic Wrenches, Torque Wrenches,

Torque Multipliers, Hydraulic Mechanical Jacks, Machine Tools, Washing &

Lubrication Equipment, Lifting Tools (Chain Pulley Block, EOT Cranes, Forklift Truck)

& tackles, Bearing Puller etc.

19. Mobile Cranes:

Mobile Cranes and their applications.

21. Auto Electricals:

Different Auto Electric components used in HEMM - their application &

maintenance.

Batteries- Rating, application and maintenance in reference to HEMM

22. Monitoring Instruments:

Different monitoring instruments fitted on HEMM and their application for both

Mechanical & Electrical Systems.

23. Electric Prime Movers:

Principles of Electrical Prime Movers.

Function & Working of Alternators, Generators, Squirrel cage/induction motors,

Synchronous motors used in HEMM

Type & Class of Insulation

Daily / Periodical maintenance methods

24. AC/DC Control System:

Type of Control System. Including Ward-Leonard control etc.

25. Transformers, Relays etc.

Types & Function of Transformers Relays.

Components of Transformer

Losses & efficiency

26. Maintenance & monitoring of statistical data relating to Equipment performance &

Production

27 . General Knowledge on Technical Parameters - of the Earth moving Equipment

deployed in CIL Mines- Equipment wise

28 . Knowledge on deployment of HEMM in the Mines for optimum utilization

29 . Basic Knowledge of Haul Road/Dump Road - Planning Construction and

Maintenance

30 . Safety aspects in Mining operation in respect of DGMS guide lines for different

HEMM

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