Fuel tank
Steel, stamped from leaded steel sheet. It is installed in the trunk on the right side on gaskets 9 and secured with two clamps 10, tightened with a bolt. The filler neck is brought out under the hatch in the right rear wing and is closed with a blind threaded plug 6. The tank is connected to the atmosphere by an air tube 7. The fuel located in the loop of the tube 7 reduces the evaporation of gasoline in the tank. Access to the drain plug of the tank is through an opening in the floor of the body. In the tank, combined - in one assembly unit 5 fuel receiver and fuel level and reserve indicator are installed.
The fuel tank on 2102 and 21021 vehicles is installed under the rear floor of the body.
Fuel pump
Diaphragm type, with mechanical drive, is installed on the left side of the cylinder block and has manual pumping (Fig. 31). It is driven by a pusher from the eccentric of the oil pump drive shaft. The pump consists of a lower housing 13 with drive levers, an upper housing 3 with valves and pipes, a diaphragm unit and a cover 5. Between the two upper working diaphragms for fuel supply and the lower safety diaphragm, operating in contact with crankcase oil, spacers 14 and 15 are installed. The outer gasket 15 has an opening for fuel to escape if the working diaphragms are damaged.
In the upper housing 3, textolite valves are installed: inlet 6 and outlet 16. The valve seats are brass. A plastic mesh filter 2 is placed under the cover 5. In the lower housing 13, a lever 12 with a balancer 11 and a lever 8 for manual fuel pumping with a spring 9 acting on the balancer through a cam 10 are installed.
The article is taken from the website: VazBook.ru
When the engine is running, the eccentric of the oil pump drive shaft acts through the pusher on the lever 12 and turns the balancer 11, which pulls the pump diaphragms with the rod 7. Under the action of vacuum, the fuel through the branch pipe 4 through the valve 6 fills the working cavity. When the eccentric runs off the pusher, the lever 12, the balancer and the rod with the diaphragms are released. The diaphragms close the inlet valve and through the outlet valve 16 supply fuel to the carburetor float chamber through the branch pipe 1.
With low fuel consumption, the stroke of the diaphragms will be incomplete, so the stroke of lever 12 will be partially idle.
Air filter
Dry type, consists of a housing, a cover and a filter element (see fig. 26). The housing has a branch pipe for cold air intake in the summer and a branch pipe for intake of air heated from the exhaust manifold through a corrugated hose in the winter. The dry filter element consists of a cardboard accordion clamped between the housing and the cover. For preliminary air cleaning, an element made of synthetic cotton wool is put on the cardboard filter. A manifold with a branch pipe for exhaust gas extraction from the crankcase is welded to the housing from the bottom.