. The download link will expire in 30 days. Run a blunt object around the inside of the leather cup to make sure any coating is broken. These diagrams include: Fig. A fuel pump cannot be tested by unhooking the line and seeing if gas comes out. Make sure these are clear if you have percolation problems. The distance from the dust cover boss to the top of the plunger shaft should be 1/2 inch (distance from base to tip of finger on gauge) (C). 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. 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. You cannot go wrong with Mikes carburetor in any way. Your friend will receive an email from you with a link to our site. Back out throttle stop screw until throttle valves seat in bores. Both Carter and Rochester engineers determined that, on some applications, the float level in the primary side of the carburetor should be different than in the secondary side of the carburetor. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. Do not depress float lip against spring in needle, but let float rest of its own weight. Carter WCFB Rebuild kits: Rebuild Kits. Carter WCFB 4 Barrel Adjust Float. Metering rods for the WCFB have been out of production for several years now. Make sure the air horn contacts the inner wall of the bowl. You are flooding (getting too much gas in the float bowl), caused by these types of problems. With carburetor installed and engine warmed up. Press down on the vacummeter link (H) until the metering rods bottom in the carburetor body (J). From my experience it is the most complete and comprehensive source for all things carburetor, encompassing a massive spectrum of makes models and applications. The metering rod adjustment should be done after the pump adjustment. Be careful when removing the top of the carburetor that you don't force things and break the piston lever. When replacing them hold them tight against the wall while tightening the screw. Carter WCFB 4 Barrel Accelerator Pump Circuit 3,951 views Jul 13, 2018 33 Dislike Share Mikes Carburetor 20K subscribers https://www.carburetor-parts.com is providing this video about how the. Check to see that slots in air cleaner gasket line up with vent tubes and do not rotate gasket during installation of air cleaner. 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 Readjust dashpot plunger to move 1/16 inch on closing of throttle valves. Loosen the clamp screw A Press. Any bubbles indicates a leak.Make sure the 2 floats are the same height. Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. Make sure there is a check needle below the main discharge. Carter WCFB 4 Barrel Carburetor Float System. Solid fuel has the 2 tubes pointing up. 2: Carter AFB idle mixture and speed adjustment screws. If a loss of rpm is noted, or if the engine dies, and air leak exists. Check the low speed jets to make sure they are clear (#44). Do not depress float lip against spring in needle, but let float rest of its own weight. Aspringis inserted in the power piston hole, then the piston. 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! It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. Add a couple drops of oil to the leather. With choke valve held closed and fast idle adjusting screw C, or fast idle adjusting tang, on high step of cam. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. The most complete document I have found. When removing valves they should be marked so that they get put back the same way. 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. How to Adjust a Carter BBD 2 Barrel | It Still Runs The Carter carburetor has been around for a very long time. WCFB carburetors, althqugh basically all units are allke. Test the fuel pump to be sure it isnt putting out too much pressure. Fig. Adjust by bending the choke connector rod at lower angle (H). Though fuel float bowl full, cant get gas into the accelerator pump chamber of the carb. Other than that, great company to deal with. Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. With mineral spirits in the float bowl, Raise the pump. 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. Piston force is too much for linkage. Install the pump connector rod (D) in the outer hole, long stroke. Share. a. They work fine when I push hard down on the piston. Put a straight edge across the dust cover as illustrated. *New Float6. This restricts the flow of fuel. Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. Master Technician Tool Set (early, circa 1935, for 1923~1935 Carter carburetors all makes - most tools then current) Carter Master Technician Tool Set about 1951. The accelerator pump circuit resides on the primary side of. Then close throttle. I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. This restricts the flow of fuel. Test the needle by holding it down gently with a brass drift punch. 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. 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. Blowing out passages will not get them clean enough. Measure float height as illustrated above. Recheck unloader settings with carburetor on the engine. Once engine speed gets high enough, the carburetor vacuum is strong enough to pull fuel through the main jet and the accelerator pump circuit is no longer used. *New Accelerator Pump5. This eliminates any bog or hesitation when acceleration. The single step rods were used on some of the price leader carburetors (i.e. Adjust by bending throttle connector rod at upper angle (B). *New Airhorn Gasket7. The flat surface of the pump arm should be parallel to the straight edge. Tyler's Forgotten Car Rescue 22,933 views. You can also check the adjustment by measuring (F) which should be 18/64. If not then clean it and try again. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. 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. Older kits 30-70s. Some have a coating to give it a better shelf life. Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! All These Part Numbers Interchange Into Our Part No. Seat the discharge check by tapping lightly in the hole to form a good seal. Examine the viton tip for any marks.Fuel pump pressure could be too high. The flat on top of the pump arm should be parallel to the straight edge. 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. Low fuel pump pressure always check you motors manual for the correct pressure. The metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. When the engine gets hot and then is shut off, gas can sometimes overheat and then boil. While holding the parts as indicated above, rotate the metering rod arm B until the finger on the arm at D contacts the lug on the vacuum piston link C. Primary & secondary float will probably have different measurements. The lower edge of vent valve cap should be raised above surface of dust cover the distance listed in the. Carter WCFB Build Sheets 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). Carter WCFB Fast Idle With carburetor installed and engine warmed up. Can't find the answer you're looking for? The cfm of the Carter WCFB four-barrel carburetor is approximately 400. 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. Float drop not set, or fuel pump pressure too low. Why Doesn't Adjusting Idle Mixture Screws Make any Difference? Probably around 4- 4.5lbs. Ethanol gas does not have much if any lubrication. Could the float bowl actually be the problem? Fast, secure e-book download. Adjust by bending throttle connector rod at deepest angle as shown. 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? Carter WCFB 4 Barrel Carburetor Float System. 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. The high speed air bleed and the secondary bleed tube also acts as an anti-percolator. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Readjust idle to 500 RPM and fast idle to 1200 RPM On 1955 models set choke two points lean. 1956 Plymouth, Powerflite Transmission Dashpot, 1955 Pontiac Loading or Carburetor Flooding, 1956 Pontiac Hard Starting, Partially Warm Engine. With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. As the accelerator is released and the primary throttle plates are closed to the idle position, the upward movement of the pump plunger and attached spring bracket exerts tension on the spring and tends to stabilize the float in a level position. Ethanol leaves deposits behind that acts like corrosion. Fuel is puffing out nozzles on primary circuit at idle on primary carb of a dual carb set carbs were just rebuilt what is the cause. Adjust by bending unloader lip on throttle shaft lever. cm448: Ebook carburetor service manual - 341 pages, 272 MBytes, pdf format. Adjust by bending arm (J) on choke trip lever. Carter WCFB, 4 barrel metering rod adjustment instructions. Adjusting the WCFB Metering Rods The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. 19591961 Chevrolet Carter WCFB Carburetor All These Part Numbers Interchange Into Our Part No. A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. To correct, remove carburetor and turn it upside down. What more could you ask for? Place the choke housing toward the left and remove upper right main body to throttle body screw. Change the choke setting to index. The adjustment of the pump is important in order to get the required fuel. 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. Can you help me out? (note) The metering rods will fit into the jets loosely. 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. Hold in place and carefully tighten metering rod arm set screw (G). Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. This is percolation. There may be a blockage in the accelerator pump circuit which would also make it hard to pump.What is the carburetor number so we can make sure you have the correct pump?Polish the pump well with crocus cloth. Includes theory, diagrams, detailed specifications, tune-up data and complete overhaul procedures. We will contact you as soon as this product is available.