Alfa Romeo 33 owners manual page 76

text version of content this owner's manual page from owners manual to the vehicle Alfa Romeo 33, year of production 1983 - 1995:

FUEL SYSTEM 58 Central Venturi securing screw 66 Sheath support 73 Air valve spring 59 Sheath securing screw 67 Washer 74 Idling cut-off 60 Air valve control iniermediate lever68 Support securing screw 75 Air valve 61 Air valve control return lever 69 Bush 76 Air valve control tie rod 62 Bush 70 Central Venturi 77 Air valve shaft assy 71 Economisier gasket 63 Air valve automatic opening control lever 78 Air valve securing screw 64 Securing nut 72 Economisierassy 79 Stud 65 Washer (6) To correct“A” dimension, re- CHECKS AND ADJUSTMENTS place washer located under needle Before removing carburetor from valve of properly bend float stopper. engine, carryout the following checks. (7) Reassembly carburetor cover, let the engine executes a few rotations 1. Check of float chamber hydrau- lic level then repeat check operations until the prescribed dimension is obtained. For float chamber hydraulic level check, operate as follows: 2. Needle valve tightness To check needle valve tightness, see Weber twin carburetor: Checks and (I) Remove the whole air filter (see: Inspections - Needle Valve Tightness. Air cleaner) and disconnect the fuel feeding hose from float chamber cover. (2) Remove float chamber cover (3) Make sure that float is of the prescribed weight indicated in the Technical Data, that no deformation is present and that it freely rotates 1 Choke (air valve) around its pin. 2 Starting control lever (4) If checked parts are defective, replace them. (5) Verify that value of distance (3) In case the verified dimension “A” between fuel surface and float “GS. ” is not within specified valve chamber cover surface with assem- loosen lock-nut and operate on bled gasket, is within specified value. diaphragm travel adjustment nut of economiser body0 (see next A = 21+ 23 mm (0.83+ 0.91 in) figure). (4) At end of adjustment, tighten lock-nut. Remove carburetor from car in order to carry out the following checks (see: Group 01- Engine Disassemble - Engine Unit). 1. Choke opening by economiser. To adjust choke@ opening proceed as follows: (1) Fully engage choke by moving starting control lever@ as shown in relevant figure and at the same time act on the economiser control lever pushing it all the way back. (2) Insert gauged point between choke edge and duct making sure ti;;nsion “GS, ” is within specified “GS,” Dimension 4.5 + 4.75mm (0.177 + 0.187 in) 1 Economiser body 04-11 May 1983

owners manual Alfa Romeo 33

owners manual Alfa Romeo 33 - year of production: 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995 - Alfa Romeo 33 owners manual EN