- the float must rotate freely on its axis, without touching the walls of the chamber;
- the needle valve should slide freely in its seat, without distortions and jamming, and the valve leash should not interfere with the movement of the float tongue.
In order not to confuse the jets of the primary and secondary chambers during assembly, pay attention to the marking of the jets and, when installing them, be guided by the calibration data table given at the beginning of the chapter.
Main air jets 3 (see fig. Scheme of the main dosing system of the carburetor and econostat) have markings on the upper plane of the jet head (For example, «170»), which indicate the diameter of the orifice of the jet (1.70 mm).
For the main fuel jets 11, the numbers are applied on the side surface («162») and also indicate the diameter of the jet hole (1.62 mm).
The emulsion tubes 13 of the primary and secondary 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 tube calibration number.
There are also numbers on the small diffusers 18 (For example «3,5»), indicating the calibration number of the nozzle opening.
At idle fuel jets, the numbers are knocked out on a cylindrical belt (For example, «50» or «60») and indicate the diameter of the hole (0.50 or 0.60 mm).
Installation of a pneumatic throttle valve of the secondary chamber
Connect stem 8 (see fig. Scheme of the pneumatic actuator of the throttle valve of the secondary chamber) to lever 6 on the axis of the throttle valve of the secondary chamber is necessary in the following order:
- turn the throttle valve of the secondary chamber to a vertical position;
- press the rod 8 of the pneumatic drive to the stop and, holding the sleeve 11 from turning, unscrewing or wrapping the rod, adjust its length so that the hole in the tip of the rod 8 is against the pin on the lever 6;
- put the rod 8 on the pin of the lever 6 and secure with a lock washer;
- fasten the stem 8 with a lock nut, holding the sleeve 11 from turning with another wrench.