Pierburg 4A1 carburetor body parts:
1 - carburetor base; 2 - bushing; 3, 5, 37, 45 - levers; 4, 65 - return springs; 6, 20a, 48 - washers; 7, 58 - toothed washers; 8, 59, 62 - hex nuts; 9 - connecting rod; 10 - gasket; 11, 39, 40 - locking cotter pins; 12 - retaining ring; 16 - mixture quality (composition) adjustment screws; 17, 31c, 46e - sealing rings; 19 - adjusting screws; 20 - tongue; 20b, 22, 31, 46f, 47, 55, 56, 68 - cylindrical head screws; 21 - heat-insulating gasket; 23 - electromagnetic shut-off valves; 24 - accelerator pump drive rod assembly; 25 - adjusting nut for starting fuel supply by accelerator pump; 26 - float chamber; 27 - cap; 28, 46b, 60 - pressure springs; 29 - Diaphragm assembly; 30 - accelerator pump cover assembly; 30a, 58b - threaded studs; 30b - guide bushing; 31a - fuel filter; 31b - nipple; 38 - connecting rod; 44 - ratchet; 46a - diaphragm; 46c - cover of pneumatic drive of automatic starting device; 46d - adjusting screw; 49 - bimetallic spring housing; 50 - mounting flange; 51, 54 - spacers, 52, 63 - hex head screws; 57 - vacuum regulator; 58 - toothed washer; 58a - bracket; 61 - flange nut; 62 - Hex Nut; 64 - vacuum hose; 66 - thermostatic auxiliary starter; 67 - sealing gasket; 92 - protective screen; 93 - retarder of the pneumatic drive of the air damper; 94 - compensation chamber.