The well should fill with fluid. Watch on. The bowl vent is used to vent the float bowl, otherwise a siphoning of the gas can occur. Most of the single step rods were steel. Shorter and smaller overall than the 4GC Rochester, the WCFB was the right choice for dual-quads on a compact . Recheck float adjustments. Both valves should be closed. Coat threads of screw with sealing compound and install it. The carburetor will flood. This box did not have a part number. Notice holes from which linkage rods are removed so they can Back out throttle screw so that the throttle valve close completly. The accelerator pump circuit resides on the primary side of this carburetor. With mineral spirits in the float bowl, Raise the pump. 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. Can't find the answer you're looking for? Though fuel float bowl full, cant get gas into the accelerator pump chamber of the carb. Refer to the Adjustment Data Table for adjustment dimensions. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. Fast, secure e-book download. They are staked in the hole. Must be made after fast idle adjustment. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. WCFB carburetors, althqugh basically all units are allke. The ends of the connector rod should point to the throttle arm side. The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. Ultra-Sonic Cleaning3. Hold air horn upside down with floats in place and gasket removed. This circuit provides a measured amount of fuel when needed on acceleration until the vacuum and main circuit can take over. To correct, remove carburetor and turn it upside down. The most complete document I have found. 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). Recheck unloader settings with carburetor on the engine. Check any vents to make sure they are open. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. 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. This is an electronic rebuild manual, no physical copy will be provided. Other than that, great company to deal with. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. Then close throttle. Also make sure one isnt rubbing on the side. *New Float6. Rotate throttle stop screw E until engine idle at approx 500 RPM. 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. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. 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. Carter WCFB, 4 barrel carburetor manual. Float drop not set, or fuel pump pressure too low. 1955 Cadillac Idle Air Mixture Circuit WCFB Carburetor Cutting Out on Left Hand Turn Adjust by bending the connector rod at the lower bend (E). Your friend will receive an email from you with a link to our site. The setups data is the same. As the engine gains in RPM, the vacuum drops and the metering rods are pulled out of the main jet allowing more fuel to flow. Make sure the pump relief check is clean. Be careful removing the intake check retainer. Gasket removed. 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. New fuel pumps are especially suspect. They sometimes need trimming. Buy REMANUFACTURED CARTER WCFB CARBURETOR 3696S For 1958-1965 Chevrolet Corvette 327 348: Carburetors . When adjusting the screws doesn't change the RPM then it means there is a problem with either the air, or the amount of fuel. Place universal pump travel gauge T109-117S (if you happen to have one as they are not available) inverted on edge of dust cover boss of bowl cover. Please complete the fields below to send your friend a link to this product. 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? 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. You need to run wire down all small passages. You will need to check your motors manual for the spec, but around 4 or 5 should be plenty. Loosen the clamp screw A Press. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. Two ports act as calibrated air bleeds. Examine the viton tip for any marks.Fuel pump pressure could be too high. They know their stuff and provide technical assistance and guides in both paper and video formats. Carter WCFB Accelerator Pump Quick test to see if the accelerator pump is working. Ultra-Sonic Cleaning3. To correct, remove carburetor and turn it upside down. The suction along with the fuel weight pulls fuel through the intake check via the passage to the fuel bowl. Can't find the answer you're looking for? How to Adjust a Carter BBD 2 Barrel | It Still Runs The Carter carburetor has been around for a very long time. It should not be opened up. 1956 Plymouth, Powerflite Transmission Dashpot, 1955 Pontiac Loading or Carburetor Flooding, 1956 Pontiac Hard Starting, Partially Warm Engine. On 1956 models one point rich. Pulloffs : CUFWCFB2 $ 0 . If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. Secondarys are somehow stuck open (which amounts to a vacuum leak). Adjusting the WCFB float level and float drop. Blowing out passages will not get them clean enough. Seat the intake check by tapping lightly in the hole to form a good seal. 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 . Be sure these ports are clear. A float lifter spring, which is connected to the lever arm of the primary float and to a bracket on the accelerator pump plunger, is incorporated to stabilize primary bowl fuel level and prevent float bounce upon sudden stops, or on rough roads (these springs are nowhere to be found). Add a couple drops of oil to the leather. Technical Details. I have repeated multiple times with same results. 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. The high speed air bleed and the secondary bleed tube also acts as an anti-percolator. With carburetor installed and engine warmed up. Can you help me out? 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. Carter WCFB 4 Barrel Adjust Float. Press down on the vacummeter link (H) until the metering rods bottom in the carburetor body (J). Note te larger box, and the number of additional tools from the 1935 set. Carter WCFB Fast Idle With carburetor installed and engine warmed up. William C. Carter was born in Union City Tennessee in 1884. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. Eckler's Premier Quality Products 57132129 Chevy Carburetor Rebuild Kit Carter WCFB Replacement Kit Includes All Gaskets, Seals, Check Balls, Springs, Accelerator Pump & Needle Valve Read more CARTER 4 Barrel WCFB DUAL CARBURETOR KITS & FUEL FILTERS 1961-65 CHEVROLET 1955-56 DESOTO April 18, 2018 Carter Carburetors Rebuild Kits Ethanol gas does not have much if any lubrication. Can't find the answer you're looking for? Share. A fuel pump cannot be tested by unhooking the line and seeing if gas comes out. We will contact you as soon as this product is available. 1956 Chevrolet Corvette & Super Power Kit Engine Idle Speed, Idle Mixture and Throttle Linkage Adjustment Procedure. Put some fluid in theaccelerator pumpwell and press down on the pump. This can be done by looking at the impression on bowl cover gasket. If not then clean it and try again. Back out the throttle lever set screw (idle screw) to allow throttle valves to seat in the bores of the carburetor. What Has Been Done to This Carburetor?1. When that is the case, I bend the accel. Adjust idle screws D to produce a smooth idle of correct speed is obtained. The idle mixture screws adjust the amount of air/fuel mixture that goes up to the venturi at idle. This allows air instead of fuel to be drawn off the pump jets. He only had 5-years of formal education and in 1909, he founded the Carter Carburetor Manufacturing Co in St. Louis. The discharge check is seated at this time to prevent air being drawn into the pump well. Carburetors equipped with an adjustable bowl vent require adjustment. Carter WCFB Build Sheets The download link will expire in 30 days. When removing valves they should be marked so that they get put back the same way. Blow air through the main discharge to make sure the passage is clear all the way to the pump well. If a loss of rpm is noted, or if the engine dies, and air leak exists. 60 pages of great info. Change the choke setting to index. FREE to our customers that buy a rebuild kit. Rochester and Carter replacement parts are interchangeable. Put a straight edge across the dust cover as illustrated. Can't find the answer you're looking for. As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. Turn knurled nut of gauge until finger on gauge just touches top of plunger shaft (A). This restricts the flow of fuel. However, it is very similar and I found it very useful. This restricts the flow of fuel. Place the choke housing toward the left and remove upper right main body to throttle body screw. Use a brass drift punch. They are not meant to fill the hole, only to restrict it. Test the floats in hot water and if you get any bubbles then they are leaking. Can't find the answer you're looking for? See figure 9F-2.A float lifter spring, which is connected to the lever arm of the primary float and to a bracket on the accelerator pump plunger, is incorporated to stabilize primary bowl fuel level and prevent float bounce upon sudden stops, or on rough roads (these springs are nowhere to be found). There should now be .018 .023 clearance between throttle valve and bore of carburetor (side opposite idle port). Quick test to see if the accelerator pump is working. What more could you ask for? 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. Carter WCFB Rebuild kits: Rebuild Kits. The lower edge of vent valve cap should be raised above surface of dust cover the distance listed in the. A WGD usually has a pump arm like that of a WCFB (IIRC). Ideas?? 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. 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. Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. WCFB Carburetor Cutting Out on Left Hand Turn. This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. The metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. The piston is brass and can be damaged very easily. Ethanol leaves deposits behind that acts like corrosion. The download link can be found on your order confirmation email which you will receive as soon as you complete the order. The single step rods were used on some of the price leader carburetors (i.e. Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! Make sure the pontoons are centered and will not rub the bowl sides. Rotate throttle stop screw E until engine idle at approx 500 RPM. Product information . 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 (. 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. Hold a straight edge across top of dust cover housing, next to the pump arm. I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. Can't find the answer you're looking for? Readjust dashpot plunger to move 1/16 inch on closing of throttle valves. On the WCFB the check ball is usually at the bottom of the pump well. 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). Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. The fuel is also conducted through a passage in the air horn to the secondary needle seat. The Carter AFB uses weights, and therefore never goes out of adjustment. 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. Make sure the air horn contacts the inner wall of the bowl. Good quality print. Carter 2 Barrel BBD Adjustments Mikes Carburetor 21.5K subscribers Subscribe 7.9K views 1 year ago In this video we are going to show you how to do the various adjustments on both the Air. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads.
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