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SUBMITTED TO: SUBMITTED BY:ER. RAMESH CHAND PARVEEN KUMARHOD MECH. DEPTT. ROLL NO. 4611327

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Sand preparation,

Core making,

Moulding , pouring and

shakeouts,

Melting,

Cleaning

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Sand plant system,

Sand handling system,

Core making and baking system,

Moulding making and handling, Core setting system,

Melting system,

Metal pouring system, Testing lab,

Fettling section,

Painting and printing section.

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In heavy machine shop all the heavy part of tractor aremachined like gear box housing, Main transmissionhousing, Front cover etc. all the parts undergoes differentoperations like milling, boring, drilling, slotting etc. in HMSsection.

The entire machines in this section are special purposemachine; it means the machine doing special or specificoperation on a job.

The advantage of special purpose machine is that itincreases the rate of production. The machines are capableof machining any number of identical parts in a very less

time. Parts Machined in HMS Gear box housing Main transmission housing

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Gear box housing is used for fitment of gears and shafts.

The material used for Gear box housing is cast iron.

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Process of Gear Box Housing1. Marking the gear box housing2. Bottom Milling

3. Drill the location hole4. Top Milling5. Front and Rear Cover6. Left And Right Milling7. Boring

8. Bottom Milling Housing9. Tapping10.Drill for Clutch and Pedal11.Washing12.Inspection of the Gear box housing

according to design.

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Main Transmission Housing is manufacturing in heavy machine

shop. M.T. Housing is used for setup the differential and axleassembly. Material used for M.T Housing is cast iron.

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Manufacturing procedure of M.T Housing

1. Marking M.T Housing

2. Horizontal Milling.3. Radial Drilling4. Milling of M.T. Housing5. Boring

6. Boring finish7. Washing8. Inspection

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As the name suggests that in thissection light parts or small parts of

tractors are machined such as speedgears of tractor, sun & planet gearscrown wheel, PTO shaft, clutch

shaft, front and rear axle.

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SPUR GEARS& HELICAL GEARS

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PTO SHAFT

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Bevel Pinion Shaft: Bevel pinion shaft is used for transmit the power from gear

box to differential.

The material used for it is low carbon steel. Process for Bevel Pinion Shaft Raw material Material cutting. Facing and centering

Turning on s-pilot machine. Inspection according to drawing. Gear hobbing. Washing and inspection work piece. Gas carburizing & hardening.

grinding. Tempering. Washing & inspection of the bevel pinion shaft.

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ENGINE IS THEMOST IMPORTANTPART OF ANYAUTOMOBILE

ENGINE IS THEHEART OFAUTOMOBILE

IT MAY BE PETROLENGINE OR DIESELENGINE ETC.

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CRANK CASE PISTON

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CAM SHAFT

FLY WHEEL

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PISTON SLEEVE CRANK SHAFT

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FRONT COVER

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ASSEMBLY LINE

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STARTER ALTERNATOR

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IPD SHAFT

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CLUTCH PLATE PRESSURE PLATE

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The engines of different models are assembledand tested in this shop as per standard procedures.

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Engine Assembly

In this shop, whole of the engine is completed and ready forthe tractor assembly. The various parts of engine frommanufacturing section are brought in this section and they

are assembled to prepare the whole engine. The engineassembly can be divided into following steps.

Washing of crank case with a special soap solution and

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Washing of crank case with a special soap solution anddrying it by means of air jets.

Fitting of cylinder sleeve.

Fixing of studs and fitment of crank shaft in crank case.

Inserting pistons in cylinder sleeve. Assembling the lubrication pump and fitment of cam

shaft.

Mounting of flywheel with clutch assembly.

Fixing of cylinder head on the top of the cylindersleeve.

Putting tappets, push rods and rocker arm for openingand closing the valves.

Attaching the fuel filters and oil filter. Mounting the fuel injection pump and injection lines.

Fitting the self starter and alternator.

Now the engine is ready for testing. Among the allparts fuel injection system is the heart of the engine.

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Cl t h

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Clutch In HMT, all the tractors have spring loaded dry

friction type dual clutch, various parts of clutchare: pressure plate, clutch plate and spring. Release

bearings mounted on PTO shaft are always incontact with shaft when the clutch is pressed therelease bearing depress with release level withfurther produce tension in compression springsand as a result of this the gap is produce between

pressure plate and flywheel and disc become freeon pressing the clutch up to 7cm, the drive toclutch shaft is stopped and when full clutch ispressed drive to PTO as well as clutch shaft is alsostopped. But in first position PTO rotates and

wheels are in standstill position. The main function of clutch is to engage or

disengage the power coming from the engine.

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On the basis of working there are two type ofclutches.

Single clutch Double clutch

Generally double clutch is used in HMT Tractor

DOUBLE CLUTCH:- This clutch is providedwith two clutch plates one for the maintransmission & the other for P.T.O drive. In b/wthe two clutch plates, an intermediate plate is

provided. Normally, six release levers thepurpose of disengaging the clutch plates Out ofsix, three are for engine disengaging & the restof three are for disengaging the P.T.O drive.

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It is the rear part of the tractor cheesy. It also

consisting the P.T.O. shaft, which is used to the threshers,pumps and other accessories components with the help opulley attached on it.

Following are main parts of differential housing:-Crown wheel.

Differential assembly. ( with sun and star gear)

P.T.O. shaft.

Bearing. Etc

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it is a special arrangement of gears to permit

one of the rear wheel of the tractor to rotateslower or faster than the other. While turningthe tractor on curved path, the inner wheel hasto travel lesser distance than the outer wheel.

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The bevel pinion is in mesh with largebevel wheel known as crown wheel.The main function of crown wheel is

to transmit power through right angledrive to suit the tractor wheel.

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