carter wcfb carburetor adjustment
Fuel enters the primary side of the carburetor through a strainer screen at the fuel inlet and is directed to the primary needle valve and . The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads.A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. The metering rod adjustment should be done after the pump adjustment. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). Adjusting the WCFB float level & float drop: The main body is partitioned into two compartments (primary and secondary), each containing a double pontoon float and lever assembly and a needle valve and seat. Both valves should be closed. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. One caveatits my impression that the float bowl is full because when I disconnect the fuel supply line from fuel pump (to card), it has pressure on the line. The single step rods were used on some of the price leader carburetors (i.e. Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. With carburetor installed and engine warmed up. You can also check the adjustment by measuring (F) which should be 18/64. Procedure is as follows: with the throttle lever set screw backed out and throttle valves seated in bores of carburetor, press down on vacumeter link (D) until metering rods bottom at (E). The most complete document I have found. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. With choke valve tightly closed, tighten fast idle adjusting screw (K) (on high step of cam) until there is the clearance as listed on carburetor specification page between throttle valve and bore of carburetor, side opposite idle port. Carter WGD Adjustments Float Level With bowl cover assembly inverted and float resting on pin in seated needle, and with gasket removed, the distance from the bowl cover to the top of float should be 7/64. Can you help me out? The file is in PDF format, you can download and save/print a copy. William C. Carter was born in Union City Tennessee in 1884. Can fill the accelerator chamber with a syringe (through top open passages of forward barrels where choke butterfly is) and the jets will spray gas into forward chambers (and will idle and accelerate for about 15 seconds)but when that gas is depleted, the spraying stops. Back out the throttle lever set screw (idle screw) to allow throttle valves to seat in the bores of the carburetor. Rotate throttle stop screw E until engine idle at approx 500 RPM. A stand pipe is provided at both needle seats as an additional trap for foreign material that might prevent the needle valves from seating properly. Adjusting the WCFB Metering Rods The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. A WGD usually has a pump arm like that of a WCFB (IIRC). One of the butterflies is open about 1/8 with the carburetor dis assembled. Fuel enters the primary side of the carburetor through a strainer screen at the fuel inlet and is directed to the primary needle valve and seat. A stand pipe is provided at both needle seats as an additional trap for foreign material that might prevent the needle valves from seating properly. These manuals contain specifications, parts lists and instructions.The manuals can also be used to help identify those carburetors without tags. The well should fill with fluid. This eliminates any bog or hesitation when acceleration. When that is the case, I bend the accel. Recheck float adjustments. The setups data is the same. Aspringis inserted in the power piston hole, then the piston. Any pressure put on the needle will damage it. Check the low speed jets to make sure they are clear (#44). No metering rod gauges are necessary. Turn knurled nut of gauge until finger on gauge just touches top of plunger shaft (A). The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. They are not meant to fill the hole, only to restrict it. In this video I show you how to replace the fast idle spring on the WCFB carburetor. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. Then close throttle. When removing valves they should be marked so that they get put back the same way. *New Main Body Gasket8. Carter WCFB 4 Barrel Carburetor Float System Adjusting the WCFB float level and float drop. Secondarys are somehow stuck open (which amounts to a vacuum leak). Back out throttle lever set screw until throttle valves seat in bores of carburetor. During high speed operation a vacuum exists at the pump jets. There should now be 9/64 clearance between upper edge of choke valve and inner wall of air horn. Fuel enters the primary side of the carburetor through a strainer screen at the fuel inlet and is directed to the primary needle valve and seat. Do not depress float lip against spring in needle, but let float rest of its own weight. With bowl cover assembly inverted and float resting on pin in seated needle, and with gasket removed, the distance from the bowl cover to the top of float should be 7/64. Test the fuel pump to be sure it isnt putting out too much pressure. 1955 Cadillac Idle Air Mixture Circuit WCFB Carburetor Cutting Out on Left Hand Turn Two ports act as calibrated air bleeds. Blow through the intake check passage to be sure the passage is open. Watch this. When the engine gets hot and then is shut off, gas can sometimes overheat and then boil. They sometimes need trimming. They need to be centered in the bowl.Fuel could be leaking around the needle & seat. The carburetor will flood. Make sure there is a check needle below the main discharge. Free shipping for many products! Air Bled has the venturi tube pointing down into the bore. Hold air horn upright with floats hanging. Can't find the answer you're looking for. There should be a retainer keeping the check ball in place. Inspiration for this arrangement was provided by the federal government through its exhaust emissions regulations. Place the choke housing toward the left and remove upper right main body to throttle body screw. 1: Carter WCFB idle mixture and speed adustment screw location. Ultra-Sonic Cleaning3. 60 pages of great info. Adjust by bending the connector rod at the lower bend (E). With choke valve held tightly closed, take slack out of linkage and tighten clamp screw on choke lever. You will need to check your motors manual for the spec, but around 4 or 5 should be plenty. Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. Why Doesn't Adjusting Idle Mixture Screws Make any Difference? All These Part Numbers Interchange Into Our Part No. This allows air instead of fuel to be drawn off the pump jets. DO NOT apply any pressure on the needle. To prevent fuel from being drawn through the pump circuit, the passage to the pump jets is vented by a cross passage to the carburetor bowl above the fuel level. Other than that, great company to deal with. 1956 Plymouth, Powerflite Transmission Dashpot, 1955 Pontiac Loading or Carburetor Flooding, 1956 Pontiac Hard Starting, Partially Warm Engine. Notice holes from which linkage rods are removed so they can Probably around 4- 4.5lbs. The download link can be found on your order confirmation email which you will receive as soon as you complete the order. Readjust dashpot plunger to move 1/16 inch on closing of throttle valves. Anti-Rust "Dichromate" Finish**4. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. The ends of the connector rod should point to the throttle arm side. The correct way is to use a fuel pump pressure gauge. Carter WCFB, 4 barrel carburetor manual. Can't find the answer you're looking for? From my experience it is the most complete and comprehensive source for all things carburetor, encompassing a massive spectrum of makes models and applications. Adjust by bending the choke connector rod at lower angle (H). This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. One is in the secondary venturi and the other just above the throttle plate. The metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. The item you are trying to purchase is currently out of stock.Please enter your name, email, and phone number below. The flat surface of the pump arm should be parallel to the straight edge. The manual says to back out the throttle stop screw and hold the fast idle cam in the "choke open" position, then screw in the throttle stop screw until it just contacts the throttle lever arm, then give it another full turn. They are staked in the hole. Adjust by bending unloader lip on throttle shaft lever. Find many great new & used options and get the best deals for 19571958 Plymouth Fury Carter WCFB Carburetor *Remanufactured at the best online prices at eBay! 2: Carter AFB idle mixture and speed adjustment screws. The WCFB carburetor which came on some of the earliest A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. Carter WCFB 4 Barrel Adjust Float Mikes Carburetor 21.4K subscribers 5.5K views 4 years ago https://www.carburetor-parts.com is providing this video about adjusting the float level and. intro Carter WCFB 4 Barrel Carburetor Rebuild Mikes Carburetor 21.5K subscribers Subscribe 51 Share 3.1K views 9 months ago Disassemble & assemble your Carter WCFB 4 barrel. Do not depress float lip against spring in needle, but let float rest of its own weight. Please complete the fields below to send your friend a link to this product. Gasket removed. Most of the single step rods were steel. Gasket between bowl and base is installed backwards (easy to do). On 1956 models one point rich. Must be made after fast idle adjustment. I rebuilt a Carter WCFB carburetor with the lower auto choke setup. Check throttle linkage to make sure that primary throttle valves come to full wide open position. Can't find the answer you're looking for? With the thermostatic coil housing gasket and baffle plate removed, crack throttle valve and hold choke valve closed. The adjustment of the pump is important in order to get the required fuel. The ends of the connector rod should point to the throttle arm side. Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. Seat the discharge check by tapping lightly in the hole to form a good seal. With choke valve held closed and fast idle adjusting screw C, or fast idle adjusting tang, on high step of cam. Carter WCFB Rebuild Kit Selection Carter WCFB Build Sheets Carter WCFB Adjustments Carter WCFB 4 Barrel Carburetor Float System Carter WCFB Accelerator Pump BY CARB TYPE GENERAL TROUBLESHOOTING FAQs INJECTORS PURCHASE PARTS MANUALS BLOG Some models have a pump relief check in the bottom of the fuel bowl. This box did not have a part number. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Founded by William Carter in 1909, the Carter Carburetor Company produced units such as the AVS, AFB and 385-CFM WCFB for dozens of years. Look for breaks in the new gasket, or cracks around the threaded area.The needle could have been damaged while adjusting the floats. Make sure the pontoons are centered and will not rub the bowl sides. Clogged idle tube, or passages in the idle circuit. Some have a coating to give it a better shelf life. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. cm448. To correct, remove carburetor and turn it upside down. Check your auto manual for the spec, but somewhere around 4-5 lbs would be good.Be sure the power piston is not frozen in one position. The lower edge of vent valve cap should be raised above surface of dust cover the distance listed in the. This is an electronic rebuild manual, no physical copy will be provided. Low fuel pump pressure always check you motors manual for the correct pressure. Can't find the answer you're looking for? Access our free Idle Speed and Mixture Repair Guide for Chevrolet Corvette 1963-1982 through AutoZone Rewards. Carter WCFB 4 Barrel Accelerator Pump Circuit Carter BB Carburetor Assembly Part 1 of 2 Rochester Quadrajet Idle Tube Removal Tunning Rochestor Quadrajet 4 barrel Carburetor Mark Osborne. Measure from center top surface of pontoons to air horn. Put some fluid in theaccelerator pumpwell and press down on the pump. The accelerator pump circuit resides on the primary side of this carburetor. You may even have to resort to finding a used WCFB carburetor. Each float on the float assembly should be at the same height and centered so that they dont rub the side of the float bowl. *New Accelerator Pump5. *New Float6. I. DISASSEMBLY. Coat threads of screw with sealing compound and install it. Be careful removing the intake check retainer. In my repeated attempts to get the accelerator valve to pump, the car has run for several minutes combinedplenty of time to get the float bowl full. When closing the throttle, the accelerator moves up in the pump well. You need to run wire down all small passages. Install the pump connector rod (D) in the outer hole, long stroke. Share. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. WCFB Carburetor Cutting Out on Left Hand Turn. He only had 5-years of formal education and in 1909, he founded the Carter Carburetor Manufacturing Co in St. Louis. As the spring fatigues, the air valve will open too soon, creating an instantaneous lean condition, and a bog. This is an electronic rebuild manual, no physical copy will be provided. Carter WCFB Carburetor E-Manual Download eWCFB, The file is in PDF format, you can download and save/print a copy, FREE to our customers that buy a rebuild kit. When the piston is frozen you may have to drill a small hole in the bottom of the float bowl, just under the piston and hammer it out. I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. Fast, secure e-book download. It needs to go up and down easily.Is there aspringunder the power piston?Are the venturi cluster gaskets sitting flat and not curled over? Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. Carter WCFB Rebuild kits: Rebuild Kits. Adjust by bending lip of float, not float arm. It should not be opened up. Back out throttle screw so that the throttle valve close completly. Also make sure one isnt rubbing on the side. Loosen the clamp screw A Press. These diagrams include: Fig. Watch on. Probably not since only one butterfly is open. You should feel some pressure and fluid should not be bypassing the check needle. 1963-64 Studebaker Carter AFB 1962-1965 Chevrolet 327 and 409 engine carburetor manual 1958-1968 Lincoln carburetor manual AVS 1966 Chevrolet 327 and Marine Carter AVS carburetors BB Ball and Ball Single Barrel downdraft manual: 1939-60 Chrysler, Dodge, Plymouth Carter BB, BB1, BB1A and BB1D updraft Carter BB for IHC BBD Press down on vacuum piston link C until metering rods bottom in the carburetor body. However, it is very similar and I found it very useful. Disassembly2. Piston force is too much for linkage. Adjust by bending throttle connector rod at deepest angle as shown. *New Airhorn Gasket7. As for the pump not squirting.I suspect the pump well isnt filling up. Adjust by bending arm (J) on choke trip lever. The piston is brass and can be damaged very easily. Blow air through the main discharge to make sure the passage is clear all the way to the pump well. Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! Carter WCFB Build Sheets This restricts the flow of fuel. Rotate screw C, or bend tang, until throttle valves are open the distance listed in, With throttle valves held wide open, there should be a clearance between upper edge of choke valve and the inner wall of air horn (. Back out throttle stop screw until throttle valves seat in bores. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring.
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