This carburetor model was developed by the engineers of Pekar JSC, and today it is produced at the facilities of this enterprise. The K-133 carburetor is intended for installation on the MeMZ-245 engine, which is equipped with ZAZ-1102 Tavria cars.

The carburetor has one chamber, but there are two diffusers in it. The flow of the combustible mixture in it is falling, and the float chamber is balanced. The carburetor is also equipped with an EPHX system, a semi-automatic starting device, and brass floats. Let's take a closer look at this model, learn how to repair, maintain and adjust it.

Device

The K-133 carburetor consists of three main parts - this is the cover of the float chamber, the middle part, as well as the lower pipe and the mixing chamber.

The lid has a built-in air damper. There is also a fuel filter and a float needle valve. In addition, a parking unbalance valve and an accelerator pump sprayer are installed in the cover of the unit. It is equipped with an idle air jet.

This carburetor model has an air damper, which is connected to the throttle through hinges. The part is driven by rods. The button with which you can control the position of the damper is located in the car on the floor, in the tunnel. If the damper is fully closed, then the throttle is opened by means of the rods. In this case, the gap is 1.6-1.8 mm. It is this gap that allows you to get the most optimal ratio of fuel and air when starting a cold engine.

The middle part of this unit is a float chamber, as well as air channels into which diffusers are pressed. It includes floats, an accelerator pump system, power mode economizer and accelerator pump valves, main jets of the main metering system, and an idle jet.

A throttle valve is installed inside the mixing chamber of the K-133 ZAZ carburetor. The throttle is controlled via a pedal in the cabin. The damper is connected to the pedal by means of mechanical rods. In addition to the throttle valve, the mixing chamber includes an EPHH. This assembly is a closed metal case, inside of which there is a rubber diaphragm. The cover has a special screw with which you can adjust the amount of fuel mixture that will be supplied to the engine during the operation of the K-133 carburetor. The economizer valve stroke is also limited by this screw. This is the main element that allows you to adjust the vacuum generated in the intake tract.

The device of this carburetor also has a microswitch mounted on a special bracket. How effectively the EPHH system will work depends very much on the correct installation of it.

The electric valve is located on the horizontal part of the shelf, to the right of the ignition coil. It is necessary in order to enable or disable the possibility of supplying vacuum to the diaphragm of this valve. EPHH is controlled by a control unit. It can be found on the right side on the wall of the engine compartment. The main function of the unit is to control the solenoid valve, depending on what speed the engine is currently running at.

Starting device

The trigger system is equipped with a pneumatic corrector and a linkage system. All this forms a semi-automatic system that controls the air damper.

Lid

The cover of this model carburetor includes a tube for unbalancing the float chamber, as well as a fuel needle valve connected to the float. It is also equipped with fittings for supplying and lowering fuel into the tank. It also has a fine fuel filter.

float chamber

The chamber housing contains the main air duct and a small diffuser, as well as a gasket and a locking latch. In addition, the case has a large diffuser. The small one has a jumper in which channels are made that perform the function of GDS sprayers and an economizer.

GDS

This is the main dosing system of the K-133 carburetor. It is a fuel, as well as air jets and an emulsion tube.

Idle system

This carburetor has an independent idle system. It contains fuel and air jets, as well as adjusting elements. These are the quantity screw and the fuel mixture quality screw.

accelerator pump

The unit is connected to an economizer. These elements are united by one drive, which, in turn, is also connected to the throttle valve drive. In the K-133 carburetor device, the accelerator pump is equipped with a check valve, atomizer and a pressure valve.

Adjustment

Like other models of carburetors, K-133 has ample opportunities for adjustment and tuning. Here you can adjust the fuel level in the float chamber, starting clearances, idling. You can adjust the fuel consumption and dynamic characteristics, but in this case you will have to select jets and drive the car until a suitable combination is found.

It is performed as follows. With the carburetor removed, the throttle clearance can be adjusted. So, when the damper is fully closed, the gap should be up to 1.8 mm. If it goes beyond these limits, then adjust to the desired indicator by bending the thrust.

The air damper must fit snugly against the wall of the air gap chamber. This gap should be no more than 0.25 mm. The choke actuator is adjusted on the carburetor mounted on the vehicle. First, the throttle control lever is pulled out, and then it is sunk by about 2 mm. Next, close the damper completely. After that, the actuator is inserted into the air damper actuator lever and the fixing screw is tightened. Then you need to fix the cable sheath on the bracket.

After that, you can check how the air damper works. When the lever is fully extended, the damper should be fully closed. If this is not the case, then the adjustment should be continued until the normal result.

Then the throttle valve is completely closed, the cable is clamped with a screw, the tension spring is installed and the throttle valve is tightly closed. If it is completely closed, then there should be no loosening of the cable.

Idle setting

To adjust the stable operation of the engine in idle mode, you need to do the following operations. Start the engine and warm it up to 75 degrees. Then the screw responsible for the quality of the mixture is turned almost to the stop. After the quality screw is turned off by about 2.5 turns. Next, the speed screw is set to 950-1050 rpm.

If it is not possible to set up stable idling, then cleaning or repair of the K-133 carburetor is necessary. Needles are usually changed. You should also clean the fuel and idle air passages with compressed air or carburetor cleaner. Sometimes it may be necessary to replace spare parts - all this is in the repair kits that are sold today, like the carburetor itself.

Conclusion

This carburetor over the years of operation has established itself as a simple and reliable device. It can be used on ZAZ vehicles. The K-133 carburetor repair kit, like the unit itself, can be purchased at automotive stores and online markets.

The filter element is replaced every 10,000 km. With constant driving on very dusty roads, such a replacement is done every 800 ... 1000 km of run.

It is allowed to reuse the filter element after shaking off the dust and thoroughly blowing it from the inside with dry compressed air (directing the flow perpendicular to the plate on which the filter is installed). Do not aim the air jet directly at the element's filter curtain in order not to damage it. The filter element can be purged without removing it from the housing by directing the air flow through the opening of the cover perpendicular to the wall.

When assembling the air cleaner, it is necessary to pay attention to the reliability of the sealing of the nozzles in order to avoid the suction of polluted air.

Disassembly and assembly of a single-chamber carburetor (K-133 and K-133A). It is recommended to disassemble the carburetor in the following sequence:

unscrew the plug 77 of the fuel filter and remove the filter (see Fig. 28);

unscrew the screws securing the float chamber cover to the float chamber body, lift the cover and, carefully turning it towards the location of the rigid rod, remove the cover with the float from the float chamber body; simultaneously disconnecting the rod from the air damper lever;

remove the gasket, remove the axis 4 (Fig. 72) of the float and remove the float. Remove the needle 7 of the valve together with the rubber sealing washer 8 and unscrew the seat 6 of the valve. Unscrew the idle air jet 12 (see Fig. 29);

wash parts in gasoline. In the presence of abundant resinous deposits, wash the parts with acetone or thinner for nitro paints. To clean the jets, you can use a pointed wooden stick, abundantly moistened with solvent. Blow out the washed parts and channels of the carburetor with compressed air. It is not recommended to flush the fuel valve with acetone or other solvents to avoid destruction of the sealing rubber washer. It is absolutely unacceptable to use wire, even soft, to clean the jets;

check the float for tightness. When soldering the float, appropriate precautions must be taken to avoid explosion of gasoline vapours. After soldering, the mass of the float should be 13.3 ± 0.7 g. Check the tightness of the fuel valve. If necessary, replace the sealing rubber washer 8 (see Fig. 72) or the fuel valve assembly.

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Rice. 72. Float with fuel valve: 1 - float; 2 - tongue for setting the level; 3 - float stroke limiter; 4 - float axis; 5 - float chamber cover: 6 - fuel supply valve seat; 7 - fuel supply valve needle; 8 - sealing rubber washer

Assemble the cover of the float chamber in the reverse order of disassembly, while:

the idle air jet must be wrapped without much effort, checking the safety of the fiber gasket;

in case of replacement of parts of the float mechanism or if carburetor overflows were observed in operation, the correct position of the float relative to the fuel valve should be checked. This position determines the fuel level in the float chamber. Preliminary set the size of 39 mm by bending the tongue 2 (see Fig. 72). At the same time, by bending the limiter 3 of the float stroke, it is necessary to set the needle stroke of the fuel supply valve to 1.2 ... 1.5 mm. In this case, it is not allowed to press the float on the valve needle when adjusting the fuel level in the float chamber in order to avoid damage to the sealing rubber washer;

the circumferential clearance between the air damper and the cover body must not exceed 0.25 mm. Followed by:

unscrew screws 40 (see Fig. 29) and remove microswitch 39; disconnect the mixing chamber housing and at the same time, while pressing the accelerator pump drive bar, remove the drive rod earring connecting the rod to the throttle axis lever, unscrew the fuel supply screw 4 and remove the accelerator pump atomizer 3;

remove the accelerator pump drive rod 33 together with the strap and piston and remove the rod return spring. Remove the check valve safety ring from the well of the accelerator pump (using tweezers) and, turning the body of the float chamber over, remove the check valve 30 (ball d = 4 mm); unscrew plugs 13 (see Fig. 28) of the idle fuel jet and air jet 16 of the main metering system, then unscrew the jets. When turning out the jets, you should use carefully tucked screwdrivers so as not to damage the slots;

unscrew the plug 8 and remove the emulsion tube 9 (see Fig. 29), unscrew the valve 31 of the mechanical economizer and remove the fiber washer;

unscrew the adjusting screw 19 from the mixing chamber body, unscrew the screws, remove the forced idle economizer 23 (EPKhK) and remove the spray-autonomous idle system. Check the tip of the adjusting screw 19 ACXH and the conical surface of the hole, the conical surfaces of the valve 24 of the forced idle economizer system (EPXH) and the spray of the ACXX, the tightness of the sprayer 25 in the mixing chamber 28, the state of the diaphragm of the valve 24 APHX. Replace damaged parts;

check the tightness of the screws securing the throttle valve to the axle. Check the fit of the throttle valve to the body of the mixing chamber; clearance along the contour should not exceed 0.06 mm. Thoroughly rinse and blow through all parts. Check if the accelerator pump piston moves easily in the cylinder. It should move in the cylinder without jamming;

check the tightness of the delivery valve of the accelerator pump and the valve of the mechanical economizer (in case of increased gasoline consumption), inspect the gaskets: replace the damaged gaskets with new ones.

The body of the float chamber is assembled with the body of the mixing chamber in the reverse order of disassembly, while it is necessary:

wrap jets without much effort;

ensure the reliability of the seal in all places where the gaskets are installed;

check the gap between the adjusting nuts with the throttle fully open; for the economizer drive rod, it should be 4.5 ... 5.5 mm, and for the accelerator pump piston drive rod, it should be 1.5 ... 2.5 mm. Fix the position of the adjusting nuts by crimping;

install (see Fig. 29) atomizer 3 and screw in the fuel supply screw 4,

install the assembled cover of the float chamber by connecting the rod;

Rice. 73. A device for checking the fuel level in the float chamber of K-133 and K-133A carburetors: 1 - scale bar; 2 - glass tube; 3 - fitting; 4 - gasket; 5 - carburetor

check the fuel supply by the accelerator pump, which must be at least 6 cm3 for 10 piston strokes, the relative position of the air and throttle valves;

set the lower stop of the throttle lever so that the throttle is completely closed, but not wedged, and the upper stop so that the plane of the throttle is parallel to the axis of the hole with a diameter of 32 mm of the mixing chamber. With the air damper fully closed, the gap between the wall of the mixing chamber and the throttle damper should be 1.6 ... 1.8 mm (if necessary, set by bending the rod);

install the microswitch so that its pusher is recessed by lever 41 when the throttle is fully closed

the microswitch drive (the microswitch is open), while a characteristic click is heard, when the throttle valve is opened, the lever 41 drops by 3 ... 4 mm, the pusher of the microswitch is retracted by the spring, and the microswitch closes;

check the fuel level in the float chamber on the stand. The fuel level in the float chamber at an overpressure of 0.3 kgf/cm2 for gasoline with a density of 0.720 ... 0.750 g / cm3 should be 21 ... 23.5 mm from the upper plane of the float chamber.

In the absence of a stand, this check can be performed with less accuracy on the engine, for which a fitting with a glass tube is made (Fig. 73). It is necessary to unscrew the plug of the main jet and screw the fitting in its place so that the glass tube becomes vertical, then the fuel pump manual priming lever. Fill the float chamber with fuel. A metal ruler measures the distance from the upper plane of the float chamber to the fuel level in the float chamber (to the bottom of the meniscus). When installing the carburetor, pay attention to the integrity of the gaskets. After installation, it is required to adjust the carburetor while the engine is idling.

Checking the solenoid valve. The tightness of the solenoid valve should be checked by supplying air at a pressure of 0.9 ... 0.85 kgf / cm2 to the side fitting, while closing the ventilation fitting.

When a vacuum of 0.85 kgf/cm2 is applied to the vertical fitting, the solenoid valve must open with the 12 V voltage connected and close when the voltage is removed. If the voltage is connected when the engine is not running, then a characteristic click should be heard.

With the engine idling, the valve is checked by disconnecting the wire, while the engine should stop.

Checking the electronic control unit. The electronic control unit has two boundary limits. With an increase in the engine speed of the crankshaft more than 1500 ... 1800 rpm, the positive potential is turned off at terminal 1 (see Fig. 29), when the frequency decreases below 1500 rpm, a positive potential appears on the / terminal.

In this way, the operability of the unit is checked, and before that it is necessary to remove the wires to the microswitch. The absence of a positive potential at terminal / (in the presence of a positive potential at terminal 2) indicates a malfunction of the unit and the need to replace it.

In the event of a failure of the forced idle economizer system, it is necessary to de-energize the system and connect fittings 3 and 6 (see Fig. 28) with a flexible hose, while the carburetor will operate according to the generally accepted scheme, without solenoid valve 21 (see Fig. 29) of the electronic control unit 35 and microswitch

Adjustment of the carburetor when the engine is idling. The economical operation of the engine is largely dependent on the correct adjustment of the carburetor when operating at low idle speeds of the crankshaft.

This adjustment is made with the engine fully warmed up. The oil temperature must be at least 60...70°C.

Adjustment of carburetors K-133 and K-133A must be done in the following sequence:

with the engine off, tighten screw 7 (see Fig. 28) for operational adjustment and screw 2 to failure, but not tight, so as not to damage their working cones. After that, unscrew the screws by 2.5 ... 3 turns;

start the engine and turn the screw 2 to set the crankshaft speed to 950...1050 rpm;

then tighten screw 7, while the engine crankshaft speed will first increase, and then when the screw is further screwed in, the mixture will become leaner and the engine will start to work intermittently with a simultaneous decrease in engine crankshaft speed. At this point, you need to slightly unscrew the screw 7 and achieve stable operation of the engine.

The selected adjustment must be checked in variable modes - sharply press the throttle drive pedal and quickly release it. At the same time, the crankshaft speed should increase smoothly without dips and interruptions, and when the pedal is suddenly released, it should decrease to a minimum and stable one, while the engine should not stop. If the engine has stopped, turning out the screw 7, you should slightly increase the speed.

Emission test with exhaust gases into the atmosphere is carried out after adjusting the idle speed on a warm engine (oil temperature 60 ... 70 ° C).

For verification, special equipment is required - a gas analyzer with an error of no more than ± 2.5%. The check is carried out in accordance with GOST 17.2.2.03-87 in two modes: at idling speed and 2550 ... 2650 rpm.

If the emission of harmful substances does not exceed the permissible limits, the toxicity screw 2 (see Fig. 28) of the K-133 and K-133A carburetors must be painted over with red paint. If the emission of harmful substances is above the permissible limits, it is necessary to adjust the idle speed of the crankshaft and then check the emission of harmful substances.

If the emission of harmful substances could not be reduced by additional adjustment, the carburetor must be replaced and the emission of harmful substances checked; upon receipt of unsatisfactory results, diagnose the engine, identify and eliminate the detected malfunctions.

Removal and installation of the carburetor DAAZ 2101-20. To remove the carburetor, loosen the clamps and remove the crankcase ventilation hose. Unscrew the four nuts securing the outlet pipe, loosen the clamp, remove the pipe with the gasket, and remove the fuel supply hose from the carburetor pipe and close the hose with a stopper to prevent gasoline from leaking.

Disconnect the air damper drive cable from the carburetor and the thrust and return spring from the throttle drive lever, unscrew the carburetor fastening nuts, remove it together with the gasket and close the inlet pipe inlet with a plug.

Install the carburetor in the reverse order of removal. After installation, it is necessary to adjust the drive of the air damper and carburetor throttles, as well as the speed of the crankshaft when the engine is idling.

Disassembly, inspection and assembly of the carburetor DAAZ 2101-20. The carburetor is disassembled into the following main components: a housing cover assembly with a starting device, a float, a needle valve and a filter; housing assembly with diffusers and an accelerator pump; throttle body assembly with throttle valves and spool device of the crankcase ventilation system.

Vacuum" href="/text/category/vacuum/" rel="bookmark">vacuum corrector of the breaker-distributor; 19 - spool; 20 - stop screw; 22 - lever of the primary throttle valve axis; 23 - lever of connection with the starting device ; 24 - sleeve - 25 - secondary throttle actuator lever; 26 - damper actuator lever; 27 - lock washer; 28 - return spring of the secondary throttle actuator lever; 29 - starting device thrust; 30 - secondary throttle valve lever; 31 - housing throttle valves: 32 - gasket; 33 - thrust starting device

Before dismantling, it is necessary to wash the carburetor from the outside and blow it with compressed air. Disassembly is recommended in the following order:

remove the spring 28 (Fig. 74) of the lever 25 of the throttle valve drive of the secondary chamber, unpin and disconnect from the lever 23 of the throttle valve the rod 29 connecting the throttle valve of the primary chamber with the starting device;

pressing the inner cylinder of telescopic rod 7 into the outer one, disconnect it from the air damper control lever;

remove the carburetor cover with the gasket, being careful not to damage the gasket and the float, then unscrew the screws securing the throttle body to the carburetor body and carefully, without distortion, separate them, trying not to damage the transition bushings of the carburetor fuel-air channels and bushing sockets pressed into the body. Carefully detach the heat-insulating gasket from the housing and remove it;

disassemble the carburetor body cover in the following order: carefully push the axle 20 (Fig. 75) of the float out of the racks with a mandrel (push it towards the rack with a cut) and remove the axle, remove the float 19 and the needle valve 16, cover gasket. Unscrew the seat 15 of the needle valve, unscrew the plug 18 and remove the fuel filter 17;

disconnect (see Fig. 74) from the lever of the axis 8 of the air damper the telescopic rod 7 and the rod 33 of the starter drive;

remove the housing 6 of the starting device, the air damper 9 from the axle, and then remove the axle from the carburetor cover. The ends of the screws for fastening the air damper are punched. To unscrew them, a lot of force may be required and the damper axis may be deformed. In order to prevent deformation of the axis, it is recommended to put some kind of stand under it.

After disassembly, wash the parts in gasoline, blow with compressed air and check their technical condition, which must meet the following requirements:

the sealing surfaces of the cover must not be damaged, otherwise the cover must be replaced;

the float must not be damaged or distorted in any way; the mass of the float should be 11 ... 13 g;

the needle valve seat and the valve itself must not show wear on sealing damage; the needle valve must move freely in its seat; The needle valve ball must move freely and not hang.

If damaged parts are found during inspection, they must be replaced.

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Rice. 76. Setting the fuel level in the float chamber of the carburetor DAAZ 2101-20: / - carburetor cover: 2-seat of the needle valve; 3-needle valve; 4-emphasis; 5-. needle valve ball; 6-retractable fork of the valve needle; 7-bracket float; 8 tongue; 9-float; 10-gasket.

Before starting the test, it is necessary to make 10 trial strokes with lever 28 (see Fig. 31, b) to fill the channels of the accelerator pump.

The tightness of the needle valve is checked on a stand that supplies fuel to the carburetor at a pressure of 3 m of water. Art. After setting the level in the test tube of the stand, its fall is not allowed for 10...15 s. If the level of fuel in the vial drops, this indicates a fuel leak through the needle valve.

Setting the fuel level in the float chamber. For DAAZ 2101-20 carburetors, checking the fuel level in the float chamber is not provided.

The level required for the normal operation of the carburetor is ensured by the correct installation of serviceable elements of the locking device (Fig. 76): the float assembly should not have any visible damage, the mass of the float should be 11 ... 13 g; the distance between the float and gasket 10 adjacent to the carburetor cover should be (6.5 ± 0.25) mm.

The control is carried out with a gauge, the housing cover is held vertically so that the tongue 8 of the float slightly touches the ball 5 of the needle valve 3 without sinking it: the size (6.5 ± 0.25) mm is adjusted by bending the tongue 8, while it is necessary that the support platform the tongue was perpendicular to the axis of the needle valve and had no notches or dents; the gap corresponding to the maximum stroke of the float should be (8 ± 0.25) mm. It is regulated by bending the stop 4, the fork 6 should not interfere with the free movement of the float. After installing the carburetor, you need to make sure that the float does not touch the walls of the float chamber.

Proper float installation should be checked each time the float or fuel needle valve is replaced; when replacing the needle valve, the valve seal must be replaced.

Adjustment of frequency of rotation of a cranked shaft at idle. The elements that regulate the speed of the crankshaft when the engine is idling include (see Fig. 30) screw 11 of the mixture composition and screw 2, which limits the opening of the throttle. When screw 11 is screwed in, the mixture becomes leaner; when screw 2 is screwed in, the throttle valve opens slightly. A restrictive plastic sleeve is pressed onto screw 11, which allows turning the screw only one turn. Therefore, before adjusting at the service station, it is necessary, by unscrewing the screw 11, to break the protrusion of the sleeve, unscrew the screw, remove the sleeve from it and screw the screw into the carburetor again. After completing the adjustment, press a new restrictive plastic sleeve onto screw II in such a position that the protrusion of the sleeve, touching the stop in the hole, does not allow the screw to be unscrewed.

Idling adjustment is carried out on a warm engine (oil temperature 60 ... 70 ° C) with adjusted gaps in the gas distribution mechanism and with a correctly set ignition timing.

Adjustment is carried out in the following sequence (see Fig. 30):

set the maximum crankshaft speed with screw 11 at a given throttle position, and then set the minimum stable crankshaft speed with screw 2;

using screw 11 to achieve a concentration of CO in the exhaust gases of not more than 1.5% at a given throttle position and using screw 2 to restore the crankshaft speed to 950 ... 1050 rpm;

set the idle speed of the crankshaft equal to 0.6 nominal revolutions (2700 ... 2800 rpm), and check the CO concentration in the exhaust gases, which should be no more than 1%, if necessary, achieve the CO concentration with screw 7. After that, once again check the concentration of CO in the exhaust gases when idling with a crankshaft speed of 950 ... 1050 rpm and reach a concentration of not more than 1.5%;

put plug 35 (see Fig. 75) into the screw hole. In the absence of a gas analyzer, adjustment can be carried out in the following order:

use screw 2 (see Fig. 30) to set the minimum stable crankshaft speed, and then use screw 11 to achieve engine operation at maximum crankshaft speed at a given throttle position;

reduce the throttle opening with screw 2 until a minimum stable speed is obtained and, turning screw 11, set the crankshaft speed at which the engine runs with noticeable interruptions, and then unscrew the screw by 30 ... 60 ° (no more) until a stable engine operation;

Check the adjustment by depressing the throttle pedal sharply and releasing it. The engine must not be stopped.

Removal and installation of carburetor drives. To remove the throttle actuator rod assembly with cable and sheath, you must:

unscrew the screw 14 (see Fig. 32) fastening the cable to the carburetor rod and release the cable;

unpin the finger, disconnect the cable from pedal 3 and remove it completely from the tube laid in the floor tunnel; bend the bracket 18 for attaching the shell to the engine bracket;

unscrew the two bolts securing the fuel tank clamps to the floor of the body (after removing the rear seat) and slightly lift the tank up to release the shells of the carburetor rods;

remove the shell from the rubber seals (on the walls of the body).

The throttle cable is installed in the reverse order.

To remove the air damper rod from the vehicle, you must release the fuel tank mount (as described above), and then (see Fig. 32):

disconnect the rod 12 and the shell 9 from the carburetor 13, for which loosen the screws 10 and bolt II;

pull the button 4 of the air damper drive rod and completely remove it from the shell;

disconnect and remove the gearbox control mechanism from the tunnel (see subsection “Gearbox control mechanism”) and bend the shell fastening bracket located in the tunnel;

unscrew the two screws 6 fastening the bracket 5 to the tunnel and remove the bracket with the shell from the tunnel, then separate the shell retainer 7 from the bracket 6 with a screwdriver.

The assembly of the air damper control actuator and its installation is carried out in the reverse order.

Carburetor drive adjustment. After dismantling and mounting drives to the carburetor dampers or installing new ones, appropriate adjustment should be made.

It is recommended to adjust the carburetor throttle control drive as follows (see Fig. 32): loosen the screw (bolt) 14 fastening the rod 17 and use pliers to tighten the end of the rod until the pedal 3 is set to its highest position; fix the rod in this position with a screw. With proper adjustment of the actuator, the carburetor throttle should be fully closed when the pedal is released and fully open when the pedal is depressed "to failure.

The air damper drive should be adjusted in the following order: loosen the bolt (screw) 11 that fastens the rod to the carburetor air damper swivel coupling and lower the air damper drive button 4 to its lowest position; without moving the rod in the shell, fully open the air damper and in this position fix the rod with bolt (screw) 11. The shell 9 of the rod must be tightly tightened with screw 10, the shell protruding beyond the bracket is not allowed.

Engine running in

After repairing the engine, especially in the case of replacing parts of the crank mechanism, it is necessary to run it in before starting operation. The reliability and durability of the engine depends on the thoroughness of running-in no less than on the quality of the repair. The engine running-in process consists of two stages.

The first stage is running-in at idle for 35 minutes in the following modes:

1000…1200 rpm - 5 min;

2000…2200 rpm - 5 min;

3000…3200 rpm - 10 min;

1000…3600 rpm - 15 min

The engine is run on M8G1 oil or other oils specified in this book. The carburetor choke should be kept fully open. During the first stage of running-in, it is necessary to check the pressure in the lubrication system, the absence of leakage, adjust the idle speed of the crankshaft, and verify normal operation by ear. The oil pressure at 3000 rpm of the crankshaft and the oil temperature of +80 °C must be at least 2 kgf/cm2. Faults found during the running-in process should be eliminated and the oil in the engine crankcase should be replaced.

The first stage of running-in is best carried out on a stand, but in the absence of a stand, you can also use a car.

The second stage is running in the car for a run of 3000 km. During this period, it is necessary to follow the rules for running in a new car, set out in the operation manual.

The car is equipped with a dry single-plate clutch with coil springs located along the periphery and a torsional vibration damper (damper) on the driven disk. The outer diameter of the friction linings of the disc is 190 mm. The clutch is controlled by a hydraulic disengagement drive from the foot pedal.

The carburetor was developed by Pekar JSC for the MeMZ-245 engine of the Tavria ZAZ-1102 car. Carburetor - single-chamber, double-diffuser, with a falling flow of combustible mixture and a balanced float chamber, forced idle economizer, semi-automatic starting device, brass float, brazed and float mechanism with top fuel supply and autonomous idle system.

The carburetor consists of three main parts: the cover of the float chamber, the middle part with the float chamber and the lower pipe with the mixing chamber.
The cover contains an air damper, a fuel filter, a fuel valve of a float mechanism, an accelerator pump sprayer, an idle air jet and a parking unbalance valve. The air damper is pivotally connected to the throttle and is actuated by a rod, the button of which is located on the floor tunnel. With a fully closed air damper, the throttle valve opens by 1.6-1.8 mm, which achieves the best mixture formation at start-up
idle engine.

The middle part forms a float chamber and an air channel with diffusers pressed into it. In the middle part there is a float, an accelerator pump, an economizer valve, an accelerator pump check and delivery valve, an air jet of the main system, an idle jet and a main jet.
A throttle valve is located in the mixing chamber, the drive of which is connected by a rod to the accelerator pedal. In addition to the throttle valve, the forced idle economizer (EPX) is located in the mixing chamber. The economizer consists of a housing closed with a lid, inside of which a diaphragm is installed. A screw is installed on the cover, which regulates the amount of mixture entering the engine and limits the stroke of the valve with a diaphragm. The economizer is the main regulating element that controls the vacuum that occurs in the intake pipe.
The microswitch is attached to the bracket with screws. The effectiveness of the EPHH depends on the correct installation of the microswitch.
The electropneumatic valve is located on a horizontal shelf to the right of the ignition coil and is designed for
switching on and off the vacuum supply to the valve diaphragm.
The electronic control unit is installed on the right on the wall of the engine compartment. It controls the operation of the electro-pneumatic valve, adjusting it depending on the speed of the crankshaft.

Carburetor diagram K-133

The starting device contains a pneumatic corrector 14 and a system of rods that form a semi-automatic air damper drive system 7.

In the cover 1 of the carburetor there is a valve (tube) 5 for unbalancing the float chamber 18, a fuel valve 19 connected to the float 20, fittings 15 and 17 for supplying and bypassing fuel, respectively, and a fuel filter 16.

In the body of the float chamber 1, there is a main air channel with a small diffuser 8, with a gasket 9, a latch-lock 32 and a large diffuser 6. Channels are made in the bridge of the small diffuser, playing the role of atomizers of the main dosing system and an economizer.

The main dosing system consists of fuel 25 and air jets 11 and emulsion tube 10.

The idling system contains 12 fuel and 13 air jets, as well as a screw 26 for exhaust toxicity.

The accelerator pump and the economizer are combined by a common drive 2, kinematically connected to the throttle valve drive 28, rotating on the axis 29. The accelerator pump contains a check valve 33, atomizer 3 with a pressure valve 4. The carburetor is equipped with an EPHH with valve 27 and a screw for the amount of combustible mixture, an electronic pneumatic valve 23, microswitch 22 and electronic idle sensor 21.

In the body 18 of the float chamber there is an economizer valve 34 connected through a channel with a sprayer, and a float 20 kinematically connected to the fuel valve 19.

In the housing 31 of the mixing chamber there is a throttle valve and a fitting 30 for supplying crankcase gases.

Carburetor adjustment K-133

1. We adjust the gap between the wall of the mixing chamber and the throttle valve when the air damper is fully closed (the carburetor is removed)
With the damper fully closed, the gap should be 1.6 - 1.8 mm, if this is not the case, we achieve the indicated gap values ​​​​by bending the rod.

The lower part of the carburetor where the throttle cable is attached

The fit of the air damper to the wall of the air intake must be tight, the gap should not exceed 0.25 mm.
2. Install the carburetor on the car.
3. We adjust the air damper actuator (VZ):
- we fully pull out the control lever of the air intake, then we sink it by 1-2 mm.
- close the OT completely
- insert the drive (steel wire) into the boss of the VZ drive lever and clamp it with a screw, fix the drive shell on the drive shell fastening bracket.
All fastening operations are carried out with a fully closed air intake
4. Check the operation of the VZ drive:
- when the lever is pulled out, the air intake is completely closed; when it is sunk, the air intake is completely open.
5. We insert the drive (cable) of the throttle valve (DZ) into the damping device of the DZ drive lever, having previously placed the end of the drive shell in the bracket - the shell stop.
6. Completely close the DZ.
7. We clamp the drive (cable) with a screw.
8. We put on the tension spring and check whether the DZ is completely closed, and whether there is any loosening of the cable.
9 . XX adjustment

Option 1.

9.1. We start the engine and warm it up to a temperature of 65-75 degrees.
9.2. We wrap the mixture quality screw all the way, but without fanaticism.
9.3. We turn out the quality screw by 2 - 2.5 turns.
9.4. We start the engine and set the operating speed of XX in the range of 950 -1050 rpm with the screw for the amount of the fuel mixture.

Option 2.

We carry out paragraphs. 9.1. - 9.4.
9.5. using the quantity screw, we set the minimum allowable speed of the twentieth, at which the engine is able to work stably.
9.6. With a quality screw, turning it in one or the other direction to achieve the maximum increase in the speed of the twentieth.
9.7. Use the quantity screw to set the operating speed XX.
9.8. If desired, the procedure according to paragraphs. 9.5. - 9.7. can be repeated twice.
Note:
If possible, then you should not do all this and rebuild the system in the workshop with the help of a gas analyzer, and if not, then there is only one way - see paragraphs. 9.1. - 9.8.
If, when performing paragraphs. 9.5. - 9.7. it is not possible to achieve the desired results, this indicates the wear of the components of the XX system, in this case, it is necessary to replace at least the needles, as a maximum, and burnish the seats (holes) corresponding to the needles.
But there is no need to rush to the store for spare parts, you can limit yourself to adjusting according to paragraph 9.1. - 9.4. with subsequent correction (if necessary) of the XX system setting using a gas analyzer.

Adjusting (calibration) data of the K-133M carburetor

Useful video about setting up the K-133 carburetor

Sources:

• Carburetors for passenger cars, V.I. Erokhov.
• CAR ZAZ-968M "Zaporozhets", K. S. Fuchadzhi
• https://www.drive2.ru/l/3334895/

• We remove the carburetor, close the air damper. From the wall of the mixing chamber to the throttle valve, it is necessary to adjust the gap with an optimal distance of 1.6 - 1.8 millimeters. By bending the traction, we will gradually achieve the indicated indicators. The damper fits snugly to the air intake, the play does not exceed 0.25 millimeters.
• We mount the ZAZ 968 carburetor back into the car.

How to set up the VZ drive (air damper):

• We pull the entire choke control lever towards ourselves, after that we press it 1 millimeter.
• We close the air intake to the end, in this position we will carry out all fixing actions.
• We attach a steel wire to the boss of the VZ drive lever, squeeze it with a screw. We fix the drive shell on the appropriate fastening bracket.
• In order for the carburetor from Zaporozhets to work correctly, we verify the operation of the VZ drive. The closed position of the OT is observed when the lever is pulled out; damper is fully open when the lever is in the depressed position.

Actions with DZ (throttle valve)

• The throttle cable plugs into the damping device of the throttle actuator lever. The end of the drive shell is already in the bracket.
• Throttle valve is fully closed.
• The cable is clamped with a screw.
• We supply the structure with a tension spring. At the same time, we control the condition of the cable: it should not loosen, and the throttle valve should be absolutely closed.

There are two ways to adjust the idle speed for the normal operation of the carburetor from Zaporozhets:

• In the first method, we start the engine and provide heating to 75⁰С. The fuel quality screw is tightened to the stop without using excessive force. Then the same screw turns out a couple of turns. The engine starts, using the fuel quantity screw we set the working. idle speed at 950 - 1050 rpm.
• According to the second method, we do all the points of the first method. Then we set the quantity screw to the position of min idle speed, acceptable for stable operation of the motor. The quality screw allows you to achieve max increase in idle speed. And the fuel quantity screw sets the operating speed. All the steps outlined in the second method can be done twice.

Where to service the ZAZ 968 carburetor: in a workshop or in your own garage?

When setting up a carburetor on a ZAZ 968, it is not always possible to achieve a positive result on your own. Elements of the idle system can simply wear out, so it makes sense to check and replace the needles, it is possible to break in the holes for these needles. The easiest and most affordable way is to contact a specialist who will help you build a system with a gas analyzer. It all depends on your experience, free time and the availability of appropriate equipment and spare parts.

Carburetor ZAZ 968m is a cult Soviet car. He replaced the famous "humpback", and in the late 80s was restyled. Until now, in many countries there are lovers of such machines, so many of them are very often interested in issues of operation and repair. Today you will learn how to set up and adjust the ZAZ 968m carburetor with your own hands.

What kind of carburetor was equipped with Zaporozhets?

Depending on the model range and year of manufacture, ZAZ could be equipped with a K-127 or K-133A carburetor. If you carefully study them, you can find huge differences from the same K 133. These devices were not equipped with idle economizers, and the float chamber was made in such a way that it has a connection with the atmosphere and is clearly balanced.

The carburetor ZAZ 968m consists of 3 main parts:

1. Mixing chamber with lower branch pipe;
2. float chamber;
3. Float chamber cover.

All the necessary mechanisms are located in the lid. Among them are the accelerator pump sprayer, air dampers, the float chamber needle valve, as well as the jet responsible for idling.

The float chamber and diffuser are pressed into the middle part. It also contains a float and a float chamber valve.

The choke control button is located in the car interior floor tunnel. It is connected to the throttle control rods and when opened, it also opens slightly by 1.6 mm. The manufacturer configured these values ​​at release, but over time they could lose their settings.

The carburetor was used not only on ZAZ cars, but also on LuAZ. Therefore, the whole tuning process is no different on both cars.

The K-127 carburetor is two-diffuser, vertical, with a falling stream.

Reasons for tuning the carburetor ZAZ 968m?

No carburetor adjustment is made unnecessarily.

Therefore, it is performed if the car has the following list of faults:

1. Unstable idling;
2. Increased or reduced speed;
3. High fuel consumption;
4. Low throttle response of the engine;
5. Engine after overhaul.

An unadjusted carburetor or ignition system can lead to all this.

Many lovers of a LuAZ or ZAZ car also perform this procedure to increase power, but it must be remembered that when performing such a setting, fuel consumption can seriously increase, and engine life will be reduced. Our task is to consider the standard most economical carburetor adjustment while maintaining the desired ICE power.

Preparatory work before adjusting the carburetor ZAZ 968m

Before adjusting the device, you must make sure that the motor is in full working order. Otherwise, the whole procedure will be meaningless. To do this, pay attention to the clearances in the valve mechanisms. They must be nominal. If necessary, adjust them.

The next element is the correct operation of the ignition system. The advance angle must be set as needed, and the ignition coil, cables and spark plugs are in good condition. If necessary, these elements must be replaced.

It is best to put the car in a warm garage if the work is done in winter. He must stand on level ground. The gearbox is in neutral and the wheels are locked with the parking brake.

When preparing the ZAZ 968m carburetor for maintenance, the carburetor adjustment should be done after the appropriate air and fuel jet has been purchased.

Setting up the carburetor ZAZ 968m

To begin with, remove the assembly from the car, it must undergo complete disassembly, cleaning and further assembly, taking into account certain requirements. The first is the gap between the throttle valve and the mixing chamber. Ideally, it should be in the range of 1.6 mm to 1.8 mm at full throttle. To set these values, you need to bend the rod in the right direction. When the damper is closed, it should fit very tightly. Otherwise, there will be excess air leakage. Adjust the gap by grinding or by the same bending of the rod.

The throttle valve of the K-133A carburetor (correct and incorrect position): a - incorrect; b - correct; 1 - outlet of the idle emulsion channel; 2 - air channel; 3 - emulsion channel; 4 - screw for adjusting the quality of the mixture; 5 - screw for adjusting the amount of the mixture.

Now you can put the carburetor on the car. Accompanying the installation should be strict adherence to TB. The next step is to adjust the air damper. To do this, the control lever is fully extended and the damper is closed. In this position, the cable must be tightened. It is not difficult to check the work - if you drown the lever, then the damper is completely closed, if you pull it out, it opens to the full.

The throttle control actuator is adjusted in a similar way. After that, all the springs and rods of the carburetor system are assembled. The operation of the mechanism must be checked by simulating its operation.

How to adjust the idle speed of the ZAZ 968m carburetor?

The next important step is the idle setting. It depends on the fuel consumption of the car. The level in the float chamber is not set. You can configure it in two of the most common options. The manufacturer has provided both methods.

First, start the engine and warm it up to nominal temperature. It is possible that the speed will be incorrect - this is normal, because the idle speed has not yet been adjusted. Then the quality screw is tightened to the end, but not overtightened. The engine should shut down. Now we turn it out two turns and start it again, and set the revolutions corresponding to the value of 900-950 rpm with the quantity screw.

This can be finished, but there is a second option that will allow you to achieve the most efficient operation of the device. Again we turn the quality screw so that the speed is the maximum. After that, the quantity screw is tightened to the nominal value. This cycle can be done twice. As a result, you get a fairly high-quality adjustment to save the maximum amount of fuel. The same is true for the LuAZ automotive power system.

That's all. As you can see, adjusting the carburetor with your own hands is not such a difficult job. This procedure must be performed at each vehicle maintenance in order to avoid problems with it in the future.