Diagnostic procedures

TEXT C

EXERCISES

1. Translate the following words into English.

Определенные черты, сельскохозяйственные работы, постоянное улучшение, ходовая часть, трех точечная подвеска, эффективный и надежный трактор, полная сцепка, метод принудительной смазки, основные части трактора, рабочие и вспомогательные приспособления, многочисленные части, гусеницы, песчаная почва, двигатель, низкоскоростной, валы, оси, передачи, система отопления.

2. Agree or disagree with the statements using:

It's right; it will do; sure; I don't think so; I'm of a different opinion.

1. Tractors are more often used for military purposes than for farm jobs.

2. Modern tractors have a power unit, transmission system, steering unit, working and auxiliary equipment.

3. The frame must be rigid.

4. Three-point suspension is attached to the front and rear axles.

5. Pneumatic wheels can be replaced by two tracks.

6. Tractors are always equipped with diesel engines.

7. Shafts, axles, drives, gears and a clutch are the parts of the transmission system.

3. Read the description of devices or systems and name them.

a) a rigid device to carry numerous parts that form a tractor;

b) a device that prevents tractor parts from damage;

c) devices used to support the frame;

d) a device in which fuel is converted into mechanical energy;

e) a system that transmits power from the engine to the driving wheels;

f) a system that provides non-friction operation of the engine parts;

g) a system that controls the temperature of the engine;

h) a system that helps to mount implements.

4. Add some more facts to make the following statements more precise and complete.

1. The design of a tractor is connected with its function.

2. The basic parts of a tractor are a frame, an engine and working equipment.

3. The frame carries numerous parts of the tractor.

4. Three-point suspension is used on the tractor.

5. The traction mechanism is of two types.

6. The tractor has a power unit.

7. The function of the transmission system is to transmit the power.

8. Working and auxiliary equipment include a hydraulic system to mount implements.

5. Describe some parts of a tractor:

a) the frame;

b) the power unit;

c) the transmission system.

A farm tractor is a self-propelled machine to be used with various implements. To reach the highest efficiency a driver of a farm tractor must know the constructive features of the machine, ways to adjust its systems, and must provide good maintenance of all its units and fast and proper attachment of farm equipment. The driver has to get the tractor ready¹ for the operations to be performed. To work with mounted or semi-mounted² implements the driver must prepare the hydraulic system, switch on the oil pump, and adjust the three-point linkage. The width between the wheels should be changed according to the crop rows. The diesel engine must be started during not more than 5 minutes. The starter must operate steadily at minimum, maximum revolutions and at full loading. The tractor with the electro starting engine must be easily started. The engine must operate at all modes without faults or smoke. For tractor overloading a small amount of smoke is permitted.

The clutch must be easily depressed disconnecting the engine and the transmission. When the clutch is on, it provides an easy start and easy gear shifts. The gearbox, the rear axle and the terminal gears must operate with steady noise. The noise can't be sharp.

The levers, pedals and brakes must move easily. The blocking of the differentials or rear wheels must be switched on and off easily.

The drive gear to operate the PTO-shaft must be switched on and set at the proper rotation speed. The checking³ devices and warning lights⁴ for the tractor systems are to be examined as well.

Дата добавления: 2014-10-17