One is in the secondary venturi and the other just above the throttle plate. As for the pump not squirting.I suspect the pump well isnt filling up. Carter WCFB Rebuild kits: Rebuild Kits. *New Airhorn Gasket7. 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). As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. 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. However, it is very similar and I found it very useful. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. Rotate throttle stop screw E until engine idle at approx 500 RPM. When done you should see very little daylight around the valve. When Quadrajet carburetors have Carter's basic four-digit identification number before the letter S, the carburetors are aftermarket replacements. See figure 9F-2. A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. Can't find the answer you're looking for. 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. It needs about 4 lbs of pressure. Will Carter introduced the world's first 4-barrel carburetor, the WCFB (Will Carter Four Barrel) which raised air-flow to unprecedented levels. 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 This can be done by looking at the impression on bowl cover gasket. b. You cannot go wrong with Mikes carburetor in any way. The single step rods were used on some of the price leader carburetors (i.e. Both valves should be closed. Run a blunt object around the inside of the leather cup to make sure any coating is broken. Measure float height as illustrated above. Note te larger box, and the number of additional tools from the 1935 set. Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. Rotate throttle stop screw E until engine idle at approx 500 RPM. The lower edge of vent valve cap should be raised above surface of dust cover the distance listed in the. 2: Carter AFB idle mixture and speed adjustment screws. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Each size must be used in its own location. Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. The download link can be found on your order confirmation email which you will receive as soon as you complete the order. These diagrams include: Fig. Check the low speed jets to make sure they are clear (#44). Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. With carburetor installed and engine warmed up. Aspringis inserted in the power piston hole, then the piston. cm448: Ebook carburetor service manual - 341 pages, 272 MBytes, pdf format. Low fuel pump pressure always check you motors manual for the correct pressure. Ethanol leaves deposits behind that acts like corrosion. The flat surface of the pump arm should be parallel to the straight edge. Make sure the pump relief check is clean. With the thermostatic coil housing gasket and baffle plate removed, crack throttle valve and hold choke valve closed. The ends of the connector rod should point to the throttle arm side. Install the pump connector rod (D) in the outer hole, long stroke. The cfm of the Carter WCFB four-barrel carburetor is approximately 400. Coat threads of screw with sealing compound and install it. Free shipping for many products! You are flooding (getting too much gas in the float bowl), caused by these types of problems. Make sure the air horn contacts the inner wall of the bowl. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. Maximum float buoyancy is generally accomplished when the float pontoons are at a 90-degree angle to the fuel valve. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. Ethanol gas does not have much if any lubrication. Sometimes scraping around the edges with an awl will remove the staking. Secondarys are somehow stuck open (which amounts to a vacuum leak). Loosen the clamp screw A Press. Fig. Technical Details. Older kits 30-70s. The accelerator pump circuit resides on the primary side of this carburetor. Disassembly2. What Has Been Done to This Carburetor?1. When that is the case, I bend the accel. Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. Make sure the pontoons are centered and will not rub the bowl sides. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. A bushing (sorry dont have size) can be permanently installed in the choke vacuum passage in main body casting provides a more positive seal at this point, and prevents fuel from leaking into this passage on left turns and stalling the engine because of too rich a mixture. Adjust by bending lip of float, not float arm. features a Carter carburetor identification page and a function that allows you to conduct a search by entering an identification number Factory Carter AFB CFM Ratings Chart Rebuild pics The April 15th, 2019 - The carbs with 1 1 4 venturies and 1 7 16 primary bores and 1 11 16 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 Solid fuel has the 2 tubes pointing up. Do not depress float lip against spring in needle, but let float rest of its own weight. 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 (. Buy REMANUFACTURED CARTER WCFB CARBURETOR 3696S For 1958-1965 Chevrolet Corvette 327 348: Carburetors . 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. WCFB Carburetor Cutting Out on Left Hand Turn. 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. If not, then find the check ball and make sure it is loose. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). Share. Carter WCFB Build Sheets Hold air horn upside down with floats in place and gasket removed. These manuals contain specifications, parts lists and instructions.The manuals can also be used to help identify those carburetors without tags. Make sure manifold heat control valve is free. I have repeated multiple times with same results. Can't find the answer you're looking for? Adjusting the WCFB float level and float drop. Piston force is too much for linkage. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. No metering rod gauges are necessary. Do not depress float lip against spring in needle, but let float rest of its own weight. Rochester and Carter replacement parts are interchangeable. Enter Carb Number. The balance passage also tends to prevent flooding in the event one of the needles should temporarily become stuck open by maintaining equal fuel level between the two float chambers. Product information . 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? This restricts the flow of fuel. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. This circuit provides a measured amount of fuel when needed on acceleration until the vacuum and main circuit can take over. With mineral spirits in the float bowl, Raise the pump. Your friend will receive an email from you with a link to our site. 5:04. 19591961 Chevrolet Carter WCFB Carburetor All These Part Numbers Interchange Into Our Part No. Probably not since only one butterfly is open. Test the floats in hot water and if you get any bubbles then they are leaking. This is an electronic rebuild manual, no physical copy will be provided. Adjust idle screws D to produce a smooth idle of correct speed is obtained. *New Main Body Gasket8. 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. The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. cm448. Hold air horn upright with floats hanging. This eliminates any bog or hesitation when acceleration. 1955 Chevy Hard starting after flooding. I rebuilt a Carter WCFB carburetor with the lower auto choke setup. 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. Someone has installed it improperly. 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. 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. 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. With choke valve held tightly closed, take slack out of linkage and tighten clamp screw on choke lever. New fuel pumps are especially suspect. Must be made after fast idle adjustment. Recheck unloader settings with carburetor on the engine. 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. Carter WCFB 4 Barrel Adjust Float. 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. Gasket between bowl and base is installed backwards (easy to do). I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. Adjust by bending throttle connector rod at deepest angle as shown. This is an electronic rebuild manual, no physical copy will be provided. To correct, remove carburetor and turn it upside down. If it is, tap gently with a hammer and the same brass drift punch to seat it, or replace the check weight. 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. With choke valve held closed and fast idle adjusting screw C, or fast idle adjusting tang, on high step of cam. Carter carburetors fitted with air bleed idle mixture adjustment also have fuel emulsion mixture needles, but these are sealed at the factory to limit the amount of fuel admitted during idle. This box did not have a part number. Can't find the answer you're looking for? A WGD usually has a pump arm like that of a WCFB (IIRC). The bowl vent is used to vent the float bowl, otherwise a siphoning of the gas can occur. This spring is a bit complicated so this video will be very helpful when you change your spring.Find this WCFB spring here: https://www.carburetor-parts.com/wcfb-66d400.htmlFind WCFB parts here:https://www.carburetor-parts.com/wcfb-partscontents:00:0000:42 removing fast idle cam assembly00:56 taking the assembly apart piece by piece01:07 removing the old spring01:22 installing spring02:15 which direction does the pieces go?02:38 assembling the pieces03:16 installing the cam assembly onto the carburetor Adjust by bending arm (J) on choke trip lever. Test the fuel pump to be sure it isnt putting out too much pressure. 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. Hold throttle valve wide open and close choke valve as far as possible without forcing. The vacuum piston is no longer produced and can only be found as a NOS piece, or used. Adjust by bending the connector rod at the lower bend (E). WCFB carburetors, althqugh basically all units are allke. With throttle valves seated in bores, dust cover and gasket in place. The Carter WCFB and AFB designs fit easily beneath the low profile C1 and C2 hoods. With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. Can't find the answer you're looking for? *New Float6. The well should fill with fluid. 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. The file is in PDF format, you can download and save/print a copy. 1956 Chevrolet Corvette & Super Power Kit Engine Idle Speed, Idle Mixture and Throttle Linkage Adjustment Procedure. 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. Then close throttle. 1st check to make sure the fast idle linkage isnt holding the valves open. The adjustment of the pump is important in order to get the required fuel. Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. Be sure these ports are clear. Check any vents to make sure they are open. Put some fluid in theaccelerator pumpwell and press down on the pump. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Could the float bowl actually be the problem? The fuel is also conducted through a passage in the air horn to the secondary needle seat. This E-manual is pictured with the Carter WCFB carburetor with the upper auto choke. This check prevents excessive pressure in the discharge passage during acceleration. Press down on the vacummeter link (H) until the metering rods bottom in the carburetor body (J). When the engine gets hot and then is shut off, gas can sometimes overheat and then boil. 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. 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. Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. Adjust by bending unloader lip on throttle shaft lever. The Solid fuel is the later models BBDContents:00:00 intro00:34 air bled adjustments00:37 air bled float setting01:03 air bled fast idle type I01:25 air bled fast idle type II01:42 air bled fast idle type III01:58 air bled unloader02:24 air bled choke vacuum kick03:01 air bled automatic choke03:16 air bled pump04:08 air bled dashpot04:27 air bled idle speed \u0026 mixture04:58 air bled emission carburetors idle mixture06:00 air bled limiter cap06:36 solid fuel adjustments06:40 solid fuel float setting07:03 solid fuel metering rod07:27 solid fuel accelerator pump07:55 solid fuel bowl vent08:18 solid fuel fast idle cam08:43 solid fuel choke pull-off09:12 solid fuel automatic choke09:24 solid fuel egr dump valve09:46 solid fuel unloader10:08 solid fuel high altitude10:28 solid fuel idle speed \u0026 mixture12:11 solid fuel Limiter cap12:37 solid fuel fst idle12:51 solid fuel throttle positioner13:56 solid fuel vacuum throttle positioner14:31 solid fuel sol-vac15:04 solid fuel dashpot15:28 solid fuel transducer 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. Adjust by bending float arms, making sure both pontoons on each float are the same height. If hard starting still exists change the choke setting to one point lean. With engine running, check for an air leak at front left corner of carburetor between throttle body and bowl by squirting carb cleaner at this point. BBS) and were basically an on/off condition similar to the function of a power valve. Manufacturer CARTER : Brand CARTER WCFB : Model Carter 4 BBL WCFB : Item Weight 12 pounds : Country of Origin USA . Gasket removed as shown A. Check throttle linkage to make sure that primary throttle valves come to full wide open position. 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. 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. Ideas?? The accelerator pump circuit resides on the primary side of. Inspiration for this arrangement was provided by the federal government through its exhaust emissions regulations. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. Back out throttle screw so that the throttle valve close completly. Adjusting the WCFB Metering Rods The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Good quality print. 1956 Plymouth, Powerflite Transmission Dashpot, 1955 Pontiac Loading or Carburetor Flooding, 1956 Pontiac Hard Starting, Partially Warm Engine. Measure from center top surface of pontoons to air horn. (note) The metering rods will fit into the jets loosely. There should be a retainer keeping the check ball in place. They are staked in the hole. Watch on. The all-aluminum AFB (Aluminum Four Barrel) was a big innovation in 1957, and lives on today under the Edelbrock name. Test the needle by holding it down gently with a brass drift punch. Most of the single step rods were steel. Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. parts. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). 1955 Pontiac - Loading or Carburetor Flooding You may even have to resort to finding a used WCFB carburetor. Blow air through the main discharge to make sure the passage is clear all the way to the pump well. Carter WCFB 4 Barrel Carburetor Float System. Quick test to see if the accelerator pump is working. Gasket removed. Make sure there is a check needle below the main discharge. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. Two ports act as calibrated air bleeds. Contact Us Home Blog FAQ's Technical Help My Account LoginRegister Examples of Carb Numbers search 0$0 Carburetor Parts by Make & Model Scroll to see more Aero Coach Carburetor Parts Alfa Romeo American Bantam American General American LaFrance American Motors Nash Rambler Auburn Audi Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! Did the old gasket get removed? Carter WCFB, 4 barrel carburetor manual. Recheck float adjustments. Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. 1955 Cadillac Idle Air Mixture Circuit WCFB Carburetor Cutting Out on Left Hand Turn
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