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Checks compare to the data of the table placed on a cover of a case The device, and if there is a necessity, eliminate malfunctions. Normal Pressure of the fuel pump of engine ZIL-130 makes 0,017-0,023 . For definition of the charge of fuel, the device 527, attach Instead of him(it) flexible hoses the measured device of volumetric type or a flowmeter. By quantity(amount) of the spent fuel during test and to indications Tachometer find the charge of fuel (/100), appropriate certain(determined) Speeds of movement. Further with. The help of a gas analyzer make check Structure of fulfilled gases on the maintenance(contents) carbon at work The engine idling.
According to GOST 17.2.03-77 volumetric maintenance(contents) carbon in Fulfilled gases of automobiles it is defined(determined) in an exhaust pipe on depth 300 mm from its(her) cut in a mode of idling () at two frequencies Rotations (n) a cranked shaft of the engine: minimal - n_min , Raised(increased) - 0,6n_ . The maintenance(contents) carbon for the automobiles made after 1980, Should not exceed 1,5 %. For the automobiles made till 1980, n_min it is established from 3,5 up to 2 % and 0,6n_ - from 2 up to 1,5 %. Check make at adjustment Power supply systems of the engine, and also at everyone That and after repair The automobile. For definition of the maintenance(contents) carbon WITH in fulfilled gases The carburettor engine the gas analyzer of GAI - 1 (fig. 6) serves. A principle Actions of it(him) it is based on - a method, . . On measurement Absorption infra-red () radiations by an analyzed component Gas (WITH) as a result of which it(he) is heated up to some The temperature dependent on it(him) | of concentration in a gas mix ( fulfilled gases). With the help - the gauge Temperature fluctuations of tested gas will be transformed in electric The signals of the certain pressure(voltage) proportional to concentration Carbon WITH which are transferred to the measuring device. At gauging the maintenance(contents) WITH in fulfilled gases 1 it is inserted In an exhaust pipe. Gas is sucked in the charge (pump), Taking place in the case of the device/3/and, through the filter 2, acts in The optical block (inside the case), where -radiation absorbed by gas It will be transformed to the electric signal proportional to concentration WITH /4./results of the control fixed by a measuring instrument compare with Normative values.
Check of fulfilled gases on WITH is desirable for carrying out(spending) before definition The charge of fuel. 1./ diagnosing and adjusting works on To the power supply system at , also That diagnosing and adjusting works on the power supply system Are made at , also That. In the basic units and mechanisms of the power supply system of the carburettor engine, Exposed to diagnosing, are: 1. The carburettor, 2. The fuel pump, 3. Fuel filters, 4. The air filter, 5. The terminator of the maximal frequency of rotation of a cranked shaft, 6. A fuel tank 7. .
Diagnostic and adjusting works on the carburettor include: o check and adjustment on the minimal frequency of rotation Cranked shaft of the engine in a mode of idling, o check of a level of fuel and tightness of the needle valve chambers, o adjustment of a course of the pump - accelerator, o check and the terminator of frequency of rotation Cranked shaft of the engine, o check of throughput of jets (in a case Necessities), disassembly of the carburettor and his(its) clearing of a dirty And resinous substances. 1./adjustment of the carburettor / /adjustment of the carburettor / on small frequency of rotation of a cranked shaft in Mode of idling of the engine should ensure the functioning of the engine on This mode, supposing at the same time an opportunity of his(its) sharp change Before the beginning of adjustment of the carburettor warm up the engine Up to Temperatures of cooling water 75-80 With, check work of system Ignitions, drives of a throttle and air also are convinced in Absence air in the inlet pipeline. For check of underpressure in the inlet pipeline to it(him) attach The vacuum gauge (for example, instead of a tube or ), which Should show the steady underpressure equal 53, and - 60 . The adjustment appropriate to a mode of idling of the engine, carry out In the following order: 1. Wrap the adjusting screw of quality of a mix against the stop, 2. Unscrew the adjusting screw of quality of a mix on 1,5-2 Revolution; 3. Rotation of the persistent screw of a throttle achieve steady The least frequency of rotation of a cranked shaft of the engine; 4. At the given position of a throttle establish the screw of quality Mixes in position at which the engine will develop The greatest frequency of rotation of a cranked shaft; 5. Unscrewing the persistent screw of a throttle, reduce frequency of rotation Cranked shaft, keeping steady work of the engine 6. Turn of the screw of adjustment of quality of a mix increase Frequency of rotation up to the greatest value accordingly To new position of the persistent screw of a throttle. Establishing thus that the least, the greatest possible(probable) Frequency of rotation of revolutions of a cranked shaft of the engine, find The optimal position of both screws providing least Steady frequency of rotation of a cranked shaft of the engine. Further check Work of the carburettor, sharply opening also cover a throttle. The engine at It should not stop. After achievement of the minimal and steady frequency of rotation cranked Shaft of the engine it is necessary to check up the maintenance(contents) carbon (WITH) in Fulfilled gases and in case of need to impoverish a mix. In Two-chambered carburettors (To - 88) structure of a mix adjust all over again in One, then in other chamber. Frequency of rotation of a cranked shaft on a mode of idling of engines Automobiles ZIL-130 (the carburettor To - 88) and GAS - 24 (the carburettor To - 126) There should be 450-550 rev/min. 1./check and adjustment of a level of fuel in . /// Height of a level of fuel in to the chamber at the majority Carburettors settles down below a plane of a socket on 15-19 Mm. The level can be checked, not assorting the carburettor and not Removing it(him) from the engine. For this purpose at the cold engine Unscrew a fuse under one of jets and instead of it(her) Screw the union of the adaptation with a glass tube with Scale (fig. 7). Having established a tube so that zero division Scales coincided with a level of fuel in a tube, pump up Fuel the lever of manual pumping of the pump also define(determine) height Level of fuel concerning a plane of a socket Chambers of the carburettor. Similar check can be made At work of the engine idling. At some carburettors, for example To - 88, in a wall chambers for check of a level of fuel The control aperture (fig. 7,/and), / is provided Closed by a fuse, and in carburettors of type To - 124 and To - 126 Observation port (fig. 7, ), with a transparent insert and to two Ledges//as labels of a level. At working The engine on revolutions of idling in carburettors with Control aperture a fuse and through The opened aperture observe of a level of fuel. Fig. 7. Check fuel in to the chamber of the carburettor: //
/-/on a control aperture,/@-/with the help Adaptations;/in-/through an observation port Fig. 8. Circuitry of the instrument of model 577 for check Carburettors and fuel pumps: 1- ; 2-viewing glass; 3-- for Submissions of compressed air; 4 - ; 5 - The measured cylinder; the 6-panel for fastening the pump; The 7-checked pump; 5-measured cylinder; a 9-drain tube; 10 - a manometer; the 11-block Cranes; 12 - giving tube; 13 - the checked carburettor; 14 - a measured tube with a scale; 15 - a plate of fastening Carburettors; 16 - the screw of fastening of the carburettor; 17- Arm rotary: the 18-screw fixing an arm on To the rack; 19 - a shaft; 20 - ; 21 - the rack; 22 - a safety valve For check of tightness of connections and height of a level Fuel in to the chamber can be used The special device (fig. 8). Check should be made On kerosene. Fuel acts in the chamber from /4/On a tube 12 through the block of cranes 11 under pressure compressed Air which should correspond(meet) to pressure of submission Fuel in the chamber of the carburettor the fuel pump. Tightness of the carburettor is checked on absence . The level of fuel is supervised on a measured tube /14/With a scale. At carburettors in which the axis of a float is fixed on a cover chambers, it is possible to check a level of fuel the ambassador Removals of a cover by means of special patterns//(fig. 9), Fixing position of a float 1 on height / (/= 40-41 mm For carburettors To - 126, To - 126 and 39-39,6 mm at the carburettor To. - 124 ). Adjustment of the Level is made /3./ the terminator/2/establish a course of a needle/4/ The valve 5. Thus the course h should be 1,2-1,5 mm.
Fig. 9. Check of position of a float of the carburettor To - 124 at The help of a pattern 2./check of tightness of a float / /tightness of a float check / after his(its) removal from an axis, Immersing it(him) not less than on 1 mines in a vessel with the water which has been heated up Till 60-80 With. Allocation air specifies on Presence and place of cracks and damages to a float. For removal(distance) from a float of the fuel which has got there opposite Places of damage pierce an aperture and blow a float Compressed air. Places of damages solder or stick Pitches -5 and -6, then check weight of a float and it(him) Tightness. A thinness the needle valve Find out on increase of a level of fuel against The established norm in a measured tube at creation in a tank Pressure 0,025-0,03 . If the float is tight and the valve densely adjoins To the jack, height of a level of fuel in To the chamber of the carburettor adjust change of number of linings under Jack of the needle valve or bending a float, Resting in a needle. Position of the needle valve (in Carburettors To - 84, To - 88, To - 89, To - 82, To - 84, To - 88) it is possible To supervise a special pattern which check Distance from the top point of the needle valve up to a plane The top case of the carburettor. For the specified carburettors it The distance should be 13,50,3 mm. The valve with a vacuum drive (carburettors To - 82, To - 82, To - 84, To - 88 and To - 89) check on tightness and Resistance of pressure to his(its) opening on the special device. Insufficient tightness of the valve results to To enrichment of a gas mixture at partial opening a throttle. 3./check . /// In carburettors where indemnification of a working mix is carried out Regulation of underpressure with the help lamellar (type To - 22), it is necessary periodically (through 40-50 thousand kms) To supervise elasticity of plates on presence of a gleam between Sides . 4./check and adjustment of the terminator of the maximal frequency Rotations of a cranked shaft . /// Loss of elasticity of a spring of the terminator results to his(its) early To operation owing to what speed of movement decreases The automobile.
