Contents: Throttle position ↓ Microswitch position ↓ Starting device ↓ Fuel supply by accelerator pump ↓ Needle valve tightness ↓
Adjusting the positions of the throttle valves of the carburetor 2105-1107010
a – partial opening of the first chamber throttle valve; b – full opening of the throttle valves; 1 – lever on the axis of the second chamber throttle valve; 2 – lever limiting the opening of the throttle valve of the second chamber; 3 – lever rigidly connected to the axis of the first chamber throttle valve; 4 – damper drive lever; 5 – first chamber throttle valve; 6 – second chamber throttle valve
Throttle position
The partial opening of the throttle valve of the first chamber, at which the upper antenna of lever 3 (Figure a) comes into contact with lever 2, should be 6±0.1 mm.
This size can be adjusted by bending the upper tab of lever 3.
Full opening of the throttle valves is checked by turning the levers of their drive to the stop position. The maximum opening value of the first chamber throttle valve (13±0.5 mm) is adjusted by bending the lower antenna of lever 3.
The maximum opening value of the second chamber throttle valve (15±0.5 mm) is adjusted by screwing or unscrewing the pneumatic drive rod.
Adjusting the position of the microswitch
1 – lever fixed on the axis of the first chamber throttle valve; 2 – throttle valve drive lever; 3 – micro switch; A – lever antenna 1
Microswitch position
The position of the microswitch is adjusted with the air damper open. Microswitch 3 should be switched off when lever 2 is turned clockwise until it stops. When lever 2 is turned from its initial position counterclockwise until it stops in the antenna A of lever 1, the microswitch should be switched on.
To adjust the moment of switching on and off the microswitch, loosen the screws that secure it to the bracket and turn it relative to the upper screw to the desired position. Then tighten the screws.
Adjusting the carburetor starting device drive 2105-1107010
1 – three-arm air damper drive lever; 2 – air damper; 3 – starting device rod; 4 – rod; 5 – adjusting screw; 6 – first chamber throttle valve; 7 – throttle actuator rod
Starting device
When turning lever 1 counterclockwise until it stops, the air damper must be completely closed. Moreover, in this position of the lever, the end of rod 3 must be at the end of the groove of rod 4 of the starting device, but at the same time not move the rod. This requirement is met by bending rod 3.
With the air damper fully closed, the throttle valve of the first chamber should be slightly open by 0.7–0.8 mm (gap C is the distance between the damper and the chamber wall at the location of the transition holes of the idle system).
This gap is adjusted by bending rod 7.
A fully closed air damper should open by 50.5 mm (gap B) with the starting device rod when it is manually moved to the right until it stops. This value is adjusted by screw 5.
Fuel supply by accelerator pump
The fuel supply by the accelerator pump is checked for ten full strokes (turns) of lever 4 (see fig. Adjusting the positions of the carburetor throttle valves 2105-1107010) throttle actuator.
(The material is posted on the website vazbook.ru)
The fuel that comes out of the pump sprayer during these ten strokes is collected in a measuring cup. Its volume should be 5.25–8.75 cm³.
Before starting the test, make ten test strokes with the lever to fill the channels of the accelerator pump.
Needle valve tightness
The tightness of the needle valve is checked on a stand that supplies fuel to the carburetor under a pressure of 30 kPa (3 mm H2O.). After setting the fuel level in the test tube of the stand, its fall is not allowed for 10-15 seconds. If the fuel level in the tube decreases, this indicates a fuel leak through the needle valve.