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The terminator of the maximal revolutions -vacuum Type it is possible to check on the special device (fig. 10). At Terminators of this type supervise the moment of inclusion The centrifugal gauge and tightness of his(its) valve. Fig. 10. A circuitry of the instrument for check of a rotor centrifugal The gauge of the terminator of revolutions For check and adjustment of the moment of inclusion of the gauge in The device there is an electric motor with varied frequency Rotation of a shaft and tachometer for the control of speed of rotation The last. Having connected a shaft 2 electric motors with shaft of a rotor The terminator, include the electric motor, establish Frequency of rotation of a rotor 1000 rev/min and the vacuum pump Create in the centrifugal gauge/3/underpressure 2,5 . Then, smoothly increasing revolutions of a shaft of the electric motor, Observe on mercury /4/of the moment of the beginning Increases of underpressure, and on a tachometer fix The frequency of rotation of a rotor appropriate to this moment. The beginning of increase of underpressure means the beginning of operation The terminator. Adjust the gauge of rotation of the screw 7, changing Tension of a spring of the valve. Thus it is increased or The number of revolutions at which works decreases
The terminator.
Tightness of the valve of the gauge in a closed condition, Check under on the same device, as Tightness of valves of the carburettor. If necessary checks of dosing out elements (jets, Sprays) the carburettor or selection of the most economic Adjustments define(determine) throughput dosing out Elements. Throughput of jets is defined(determined) by quantity(amount) Waters in the cubic centimeters, proceeding through dosing out Aperture of a jet for 1 mines under a pressure of a water column In height 1 0,002 m at temperature of water 201. Throughput of jets can be checked up on
The device (fig. 11).
Fig. 11. A circuitry of the instrument for definition absolute carrying Abilities of jets Water acts from top 1 in the chamber/2,/ Whence through adjusting the edge(territory)/3/and a tube/4/gets In / the/chamber 5 and through a tested jet/6/follows in Beaker 7. the chamber is necessary for maintenance Constant pressure of water above a through passage aperture in the crane. For definition of a pressure under which there is an expiration of water In the chamber, the glass tube/8, / near to which is inserted a scale 9 with divisions. Opening gradually the crane, Establish in a glass tube a water level at height 1000 mm. After the level will be established, define(determine) on To stop watch (or on a sand-glass) time of the expiration The certain quantity(amount) of a liquid also count up its(her) charge in Minute. To avoid mistakes, each jet repeat 3-4 times. Temperature of a liquid during test It is supported equal 20 1. A direction of a jet of water in Jet should correspond(meet) to a direction of course Fuel through a jet in the carburettor. Before check of jets on the expiration of them wash out in acetone Or high-grade gasoline, clearing of a dirty, a fatty film and Resinous adjournment. For check on devices of the main thing and the jets which are taking place in one block (carburettors of type To - 22), apply transitive metal Or the rubber fuses, allowing to check each jet Separately, and jets make in a direction, Opposite to current through them jets of fuel in the carburettor. 5./check of a fuel tank and / and filters of sediment bowls it is necessary to check, at Necessities - to clear and eliminate leaks of fuel in Connections, twisting nuts at everyone THAT. The fuel tank should be washed out, and pipelines to blow Air not less often than an once per one year at seasonal service. For prevention of occurrence of underpressure in a tank check Serviceability of channels and cleanliness of a ventilating aperture in To fuse. 6./check fuel ./ The control of a condition and serviceability of the fuel pump Consists in periodic (not less often than through 5-10 thousand kms Run) clearing of his(its) sediment bowl and a filtering grid, To check of the maximal pressure and the underpressure, created The pump, productivity (through 12-20 thousand kms) and Tightness of valves. To check serviceability The fuel pump it is possible or it is direct on the automobile, Or after his(its) removal. In the first case the device representing is used Manometer with two hoses and unions for connection to To the power supply system. The manometer is established between the carburettor And the fuel pump. At working engine and the open crane on a manometer Observe of the pressure developed by the pump. Normally Working pump at absence of submission of fuel develops Pressure from 0,02 up to 0,03 . Having turned the crane and having stopped The engine, observe of pressure drop during 30 with. At the serviceable pump pressure drop for this time should not To be more than 0,01 . Serviceability of the fuel pump which has been removed(taken off) from the automobile, Check on the device on the maximal pressure created The pump at absence of submission of fuel on productivity, Speeds of pressure drop and to created underpressure. For Modern domestic engines productivity The fuel pump makes from 0,7 up to 2 / (-130 - 2 ?/mines, GAS - 0,8 of ?/mines), and pressure 0,015-0,03 ( and GAS - 0,02-0,03???). The defective pump assort and check a spring on elasticity On the device of design (fig. 12), measuring length Springs in a free condition and under loading, and defining(determining) Conformity of its(her) sizes and characteristics to the normative data.
Fig. 12. The device (models 357) for check of elasticity of springs fuel pumps: 1 - a rod;/2/-measuring
The cartridge; /3 - / a small cargo;/4-/the big cargo; .5 - a checked spring 7./check air . /// At next THAT (through 5-8 thousand kms) is necessary for removing(taking off) The air filter to merge oil from his(its) tank to wash out Details and filtering element in kerosene (for removal(distance) Resinous adjournment filtering element wash out in Acetone) to dry their compressed air and to collect, having filled in The case of the filter pure(clean) oil and having moistened with him(it) an element. To let The engine follows only through 10-15 mines, . . After that, As excessive oil will flow down from filtering element. At temperature is lower - 20 With in the case of the filter it is recommended To fill in a liquid or another oil. 8./check of the carburettor engineless . /// For check installation of model 489 which reproduces is used Operating conditions of the carburettor on the engine the carburettor also allows to check up On all characteristic high-speed and loading power setting. The basic units of installation (fig. 13) are system of underpressure and The power supply system with instrumentations. System Underpressures consists of the vacuum pump/17/with a drive from The electric motor (in figure it is not shown) capacity of 7 kw and two Sediment bowls for branch of fuel from air in/18/and/14/capacity on 100 , mounted in a separate premise(room). For cooling the vacuum pump in Pipe before it(him) from /15/through an atomizer/16/water moves. The power supply system includes the checked carburettor 9, 7, from which Fuel acts in measured spheres of -run 3, and fuel The pump/13/moves in the chamber of the carburettor, whence under Action of underpressure of the vacuum pump in - in mixing The chamber. Air in the carburettor acts through nozzles/8/entrance Branch pipe in which are established with apertures various Diameter (the set consists from 6 piece in the size of an aperture from 8 up to 45 Mm). The difference of underpressure before and after is measured - Water 5 and mercury/6./quantity(/amount) of air which is taking place through The carburettor, in addition can be adjusted by a throttle 11. Such In the image, changing the sizes , opening of a throttle of the mixing chamber The carburettor of a throttle 11 at the constant underpressure created vacuum The pump, it is possible to receive various modes of operation of the carburettor. Installation works (with a view of fire safety) on jet fuel ( GOST 10 227-62). The formed ????-air mix passes through Sediment bowls also leaves in an atmosphere. The quantity(amount) of fuel spent by the carburettor from 7, is defined(determined) depending on quantity(amount) of air acting through Air branch pipe and the carburettor appropriate to determined modes On the automobile, specified in applied to installation of the instruction. Fig. 13. The circuit of installation of model 489 for check of carburettors: 1 - for fuel;/2/-the pump for filling fuel;/3-/ ;/4/-the three-running crane; 5 - water ; 6-mercury , a 7-manometer; 8 - nozzles with for gauging the charge Air; the 9-checked carburettor:/10/-the inlet pipeline; 11-throttle in the inlet pipeline of installation;/12/-the filter;/13/- The fuel pump;/14-/the first sediment bowl;/15-/ for water:/16-/ Atomizer;/17/-the vacuum pump; the/1/-second sediment bowl;/19-/
The final pipeline
Comparing charges of fuel with the control values established on Reference carburettors, it is possible to define(determine) a condition and serviceability The tested carburettor. Control charges of fuel are specified in the table applied to installation. The faulty carburettor assort for the subsequent repair. devices of the power supply system of the carburettor engine consists in To replacement of jets with the raised(increased) charge of fuel new, rubbing Worn out grew grey and needles chambers, elimination by the soldering Leaks in floats, replacement faulty fuel pumps new. 1. 2. Security measures at work with the fuel equipment Operating conditions of the mechanic on repair of the fuel equipment are referred to Harmful. Long influence of mineral oil has an adverse effect On an organism of the person. In this connection it is necessary to remove fuel, Got on a leather(skin), upon termination of work carefully it is necessary to wash warm Water with soap of a hand, the person and a neck to not carry the clothes impregnated Mineral oil. The detail of the fuel equipment should wash in a bath only hair Brushes, brushes and ruffs. In time details it is necessary to put on Apron from a material. To wash details in Gasoline it is strictly forbidden. If during work with the fuel equipment the leather(skin), is damaged(injured) The damaged(injured) place is necessary for washing out a 3-percentage solution boric Acids and to bandage. For protection of a leather(skin) of hands against influence of mineral oil In an operating time it is expedient to cover with its(her) protective pastes (ointments), Which are not dissolved in mineral oil, but easily washed off by water. The following two structures of protective paste and the recipe are recommended Biological glove , ways of their preparation and use. Structure of paste of the Yaroslavl laboratory of a labour safety of Ministry of Railways in %: a soap -39,6, distilled water - 39,6, oil - 19,6, Talc - 1,2. For preparation of paste a soap put in the tank, fill in Distilled water also heat up with simultaneous stirring up to Disappearances of pieces. Then pour in the oil, formed weight Shake up up to , add talc, mix and cool. Paste Put on a leather(skin) and pound. In some minutes paste dries up, Forming on a surface of a leather(skin) a protective film. Structure of paste -1 of Research sanitary institute of a name , in %: a soap neutral (it is read out 100-percentage) - 12, Glycerin technical - 10, clay white () - 40, water - 38. Clay well pound with glycerin. Separately dissolve a soap, heating up It(him) in water. The soaps received a solution and clay with glycerin before reception of homogeneous weight. Paste put on cleanly washed up Hands a thin layer also give to dry. After work paste wash off cold Water. For protection of a leather(skin) of hands against harmful influence of mineral oil The factory of the fuel equipment and other enterprises apply so-called Biological glove , prepared under the following recipe: casein - 300 , waters - 850 ml, spirit - 850 ml, glycerin - 300 ml, Spirit - 30 ml. The prepared structure pour on a palm and, hands, put it(him) on
