1942 - 1947 Chevrolet Shop Manual



	*6-40*

	6. Install the outlet and inlet check valves (14) and (15) in the carburetor body, Fig. 82. Then install the screen (16), passage plug (18) and gasket (17). Install the accelerating pump jet (6), plug (8) and gasket (7). 7. Install the metering rod jet and gasket. Place the accelerating pump spring in the cylinder. Slip the accelerating pump plunger assembly sleeve over the leather, then, with the assembly sleeve centered over the cylinder, push the pump plunger into the cylinder.	may be made by bending the two stops on the float with a small pair of pliers. 10. Install a new accelerating pump cylinder cork gasket to the bowl cover. Then install the cover to the bowl using a new gasket. 11. Assemble the accelerating pump plunger link and lock it in place with the hairpin lock. 12. Assemble the throttle connector rod to the pump arm. then install its anti-rattle spring and retainer. 13. Synchronize the metering rod with the throttle valve as previously explained under "Metering Rod." 14. Install the metering rod hole cover on the metering rod, making sure the cover slides up and down freely on the rod. Then install the metering rod and spring. 15. Install the idle adjusting screw (9). Fig. 82, turn the screw in until it seats and then back it off one turn. Install the idle port passage plug (10) and gasket (11). 16. Lubricate the felt wick on the pump arm shaft with a few drops of engine oil. Install the dust cover. The carburetor is now ready to install on the engine, CAB-OVER-ENGINE TRUCK CARBURETOR The carburetor used on the cab-over-engine truck is the up-draft type equipped with a vacuum-controlled power jet. Figure 83 shows the carburetor in cross-section. Sufficient time should be spent on this drawing to definitely establish the location of the various parts. Starting With the choke valve in "closed" position when starting, air is drawn in through the bleeder hole

	Fig. 82—Downdraft Carburetor Jets and Plugs
	1 Passage Plug 11 Passage Plug Gasket 2 Passage Plug Gasket 12 Low Speed Jet Gasket 3 Nozzle Screw 13 Low Speed Jet 4 Main Nozzle Gasket 14 Pump Outlet Check 5 Main Nozzle Valve 6 Pump Jet 15 Pump Inlet Check 7 Passage Plug Gasket Valve 8 Passage Plug 16 Pump Strainer Screen 9 Idle Adjusting Screw 17 Passage Plug Gasket and Tension Spring 18 Pump Screen Retainer 10 Passage Plug and Passage Plug 8. Install the needle valve and seat in the bowl cover, then install the float and lever pin. 9. With the cover turned upside down, and cover gasket removed, check the float level by measuring from the underside of the cover to the float. This distance should be 1/2", Fig. 78. CAUTION-When making float level adjustments do not press on the float proper-bend the lip that contacts the needle. Turn the cover right-side up and check the low position of the float by measuring from the underside of the cover to the top of the float. This distance should be 1". Adjustment

		Fig. 84-Choke Valve Position When Starting