- the float should rotate freely on its axis without touching the walls of the chamber;
- the needle valve must slide freely in its seat without distortion or jamming, and the valve leash must not interfere with the movement of the float tongue.
To avoid mixing up the first and second chamber jets during assembly, pay attention to the jet markings and when installing them, follow the calibration data table (see table. Calibration data for carburetor 2105-1107010).
Main air jets 3 (see Scheme of the main metering system of the carburetor and economizer) have a marking on the upper plane of the nozzle head (for example, "170"), which indicates the diameter of the nozzle hole (1.70 mm).
The main fuel jets 11 have numbers on the side surface ("107") and also indicate the diameter of the jet hole (1.07 mm). The emulsion tubes 13 of the first and second chambers of the carburetor of this car are the same. However, on other car models they may be different. Therefore, on the cylindrical surface, at the bottom of the tubes, numbers are applied (for example, "F15"), which indicate the calibration number of the tube.
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On small diffusers 18 there are also numbers (for example, "4.5") indicating the calibration number of the nozzle hole.
For idle fuel jets, numbers are stamped on the cylindrical belt (for example, "50" or "60") and indicate the diameter of the hole (0.50 or 0.60 mm).
Installation of the pneumatic drive of the second chamber throttle valve
Attach rod 8 (see Fig. Carburetor throttle drive diagram 2105-1107010) to the lever 6 on the axis of the throttle valve of the second chamber it is necessary in the following order:
- turn the throttle valve of the second chamber to the vertical position;
- press down on the pneumatic actuator rod 8 until it stops and, holding the sleeve 11 from turning, by unscrewing or screwing the rod, adjust its length so that the hole in the tip of the rod 8 is opposite the pin on the lever 6;
- place rod 8 on lever pin 6 and secure with a lock washer;
- secure rod 8 with a lock nut, holding sleeve 11 from turning with another key.