Adjust by bending the choke connector rod at lower angle (H). Add a couple drops of oil to the leather. 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). You may even have to resort to finding a used WCFB carburetor. Adjust by bending throttle connector rod at upper angle (B). 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. Fig. 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 You need to run wire down all small passages. Though fuel float bowl full, cant get gas into the accelerator pump chamber of the carb. Hold air horn upside down with floats in place and gasket removed. Metering rods for the WCFB have been out of production for several years now. To correct, remove carburetor and turn it upside down. The most complete document I have found. Ethanol leaves deposits behind that acts like corrosion. The bowl vent is used to vent the float bowl, otherwise a siphoning of the gas can occur. Make sure the air cleaner gasket does not block the bowl vents. 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 file is in PDF format, you can download and save/print a copy. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. Then close throttle. Do not depress float lip against spring in needle, but let float rest of its own weight. 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 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 Main Body Gasket8. The piston is brass and can be damaged very easily. Ultra-Sonic Cleaning3. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). 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. 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 . Back out throttle stop screw until throttle valves seat in bores. This allows air instead of fuel to be drawn off the pump jets. They work fine when I push hard down on the piston. 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. Disassembly2. Note te larger box, and the number of additional tools from the 1935 set. One of the butterflies is open about 1/8 with the carburetor dis assembled. Carter WCFB 4 Barrel Carburetor Float System Adjusting the WCFB float level and float drop. Adjust by bending lip of float, not float arm. The ends of the connector rod should point to the throttle arm side. Press down on vacuum piston link C until metering rods bottom in the carburetor body. The flat surface of the pump arm should be parallel to the straight edge. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. Each size must be used in its own location. These diagrams include: Fig. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). 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 Can't find the answer you're looking for. 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. The cfm of the Carter WCFB four-barrel carburetor is approximately 400. Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. To correct, remove carburetor and tighten throttle lever by either peening end of shaft over, or soldering end of shaft to throttle lever. Please complete the fields below to send your friend a link to this product. Carter WCFB 4 Barrel Carburetor Float System. Adjust idle screws D to produce a smooth idle of correct speed is obtained. 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. 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. With carburetor installed and engine warmed up. Hold throttle valve wide open and close choke valve as far as possible without forcing. Access our free Idle Speed and Mixture Repair Guide for Chevrolet Corvette 1963-1982 through AutoZone Rewards. This is an electronic rebuild manual, no physical copy will be provided. 57-65 WCFB 1 x 4 carb - Cover only no spring or spring plate CUD3741 $ 4.99 Gasket - Base WCFB 4GC G402 $ 4.95 Flange Gasket G1164 $ 4.95 WCFB Air Cleaner Gasket . Older kits 30-70s. Can you help me out? Measure from center top surface of pontoons to air horn. With mineral spirits in the float bowl, Raise the pump. The item you are trying to purchase is currently out of stock.Please enter your name, email, and phone number below. With throttle valves seated in bores, dust cover and gasket in place. Adjusting the WCFB Metering Rods The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Ideas?? Product information . The download link will expire in 30 days. Take the top off and put the pump in the well all the way to the bottom. 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. Someone has installed it improperly. Most of the single step rods were steel. 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 idle mixture screws adjust the amount of air/fuel mixture that goes up to the venturi at idle. Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. Make sure the air horn contacts the inner wall of the bowl. Recheck float adjustments. Change the choke setting to index. Can't find the answer you're looking for? However, it is very similar and I found it very useful. Two ports act as calibrated air bleeds. 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. If not then clean it and try again. 5:04. The all-aluminum AFB (Aluminum Four Barrel) was a big innovation in 1957, and lives on today under the Edelbrock name. Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. Sometimes scraping around the edges with an awl will remove the staking. Carburetors equipped with an adjustable bowl vent require adjustment. All late model WCFB carburetors have three different length bowl cover screws. cm448: Ebook carburetor service manual - 341 pages, 272 MBytes, pdf format. Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. Aspringis inserted in the power piston hole, then the piston. The metering rod adjustment should be done after the pump adjustment. 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). In this video I show you how to replace the fast idle spring on the WCFB carburetor. Some have a coating to give it a better shelf life. BBS) and were basically an on/off condition similar to the function of a power valve. Watch on. Carter WCFB, 4 barrel carburetor manual. Place the choke housing toward the left and remove upper right main body to throttle body screw. When done you should see very little daylight around the valve. I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. Includes theory, diagrams, detailed specifications, tune-up data and complete overhaul procedures. When Quadrajet carburetors have Carter's basic four-digit identification number before the letter S, the carburetors are aftermarket replacements. It needs about 4 lbs of pressure. This is percolation. As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. but if it runs well you don't really need to make any adjustments. 1955 Pontiac - Loading or Carburetor Flooding Put a straight edge across the dust cover as illustrated. Examine the viton tip for any marks.Fuel pump pressure could be too high. Recheck unloader settings with carburetor on the engine. Back out the throttle lever set screw (idle screw) to allow throttle valves to seat in the bores of the carburetor. DO NOT apply any pressure on the needle. Carter used metering rods with a single step, 2-step, 3-step, and 4-step. Other than that, great company to deal with. Gasket between bowl and base is installed backwards (easy to do). Any pressure put on the needle will damage it. 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. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. 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. cm448. Readjust idle to 500 RPM and fast idle to 1200 RPM On 1955 models set choke two points lean. Be careful removing the intake check retainer. What more could you ask for? When replacing them hold them tight against the wall while tightening the screw. Back out throttle lever set screw until throttle valves seat in bores of carburetor. Do not depress float lip against spring in needle, but let float rest of its own weight. See figure 9F-2. Check any vents to make sure they are open. Adjust by bending throttle connector rod at deepest angle as shown. Place the choke housing toward the left and remove upper right main body to throttle body screw. Some models have a pump relief check in the bottom of the fuel bowl. 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. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. b. The ends of the connector rod should point to the throttle arm side. Be careful when removing the top of the carburetor that you don't force things and break the piston lever. You should feel some pressure and fluid should not be bypassing the check needle. This can be done by looking at the impression on bowl cover gasket. Carter WCFB 4 Barrel Carburetor Float System. Make sure the pontoons are centered and will not rub the bowl sides. The setups data is the same. Free shipping for many products! 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? Make sure there is a check needle below the main discharge. On 1956 models one point rich. The single step rods were used on some of the price leader carburetors (i.e. 3: Holley 4150 idle mixture and speed adjustment screws. Check the low speed jets to make sure they are clear (#44). As the spring fatigues, the air valve will open too soon, creating an instantaneous lean condition, and a bog. On the WCFB the check ball is usually at the bottom of the pump well. 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. Clogged idle tube, or passages in the idle circuit. I rebuilt a Carter WCFB carburetor with the lower auto choke setup. 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. Refer to the Adjustment Data Table for adjustment dimensions. 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. This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. WCFB carburetors, althqugh basically all units are allke. Solid fuel has the 2 tubes pointing up. The adjustment of the pump is important in order to get the required fuel. Pulloffs : CUFWCFB2 $ 0 . The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. 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. It should not be opened up. 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. Ethanol gas does not have much if any lubrication. There should be a retainer keeping the check ball in place. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. Adjust by bending arm (J) on choke trip lever. Adjust by bending unloader lip on throttle shaft lever. Can't find the answer you're looking for? Adjust idle screws D to produce a smooth idle of correct speed is obtained. Gasket removed as shown A. In this video we are going to show you how to do the various adjustments on both the Air Bled and the Solid Fuel type of BBD carburetors. 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. If it is, tap gently with a hammer and the same brass drift punch to seat it, or replace the check weight. 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 Could the float bowl actually be the problem? Test the floats in hot water and if you get any bubbles then they are leaking. Your friend will receive an email from you with a link to our site. 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. The Carter AFB uses weights, and therefore never goes out of adjustment. Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. I. DISASSEMBLY. Make sure these are clear if you have percolation problems. Carter WCFB Fast Idle With carburetor installed and engine warmed up. Anti-Rust "Dichromate" Finish**4. A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. Press down on the vacummeter link (H) until the metering rods bottom in the carburetor body (J). This is an electronic rebuild manual, no physical copy will be provided. This eliminates any bog or hesitation when acceleration. This circuit provides a measured amount of fuel when needed on acceleration until the vacuum and main circuit can take over. a. Back off the idle screw so that the throttle plates close completely. 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. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. 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. 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 Rochester and Carter replacement parts are interchangeable. Can't find the answer you're looking for? Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. They are not meant to fill the hole, only to restrict it. Disassembly2. Piston force is too much for linkage. Carter WCFB 4 Barrel Carburetor Float System. Both valves should be closed. The discharge check is seated at this time to prevent air being drawn into the pump well. Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. Tyler's Forgotten Car Rescue 22,933 views. What Has Been Done to This Carburetor?1. Can't find the answer you're looking for? 1st check to make sure the fast idle linkage isnt holding the valves open. There should now be 9/64 clearance between upper edge of choke valve and inner wall of air horn. Measure float height as illustrated above. The fuel is also conducted through a passage in the air horn to the secondary needle seat. Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. 60 pages of great info. When removing valves they should be marked so that they get put back the same way. Coat threads of screw with sealing compound and install it. During high speed operation a vacuum exists at the pump jets. This restricts the flow of fuel. Hold air horn upright with floats hanging. How to clean the Jeep Carter BBD carb Idle jets - Duration: 7:14. Fast, secure e-book download. Also make sure one isnt rubbing on the side. Readjust dashpot plunger to move 1/16 inch on closing of throttle valves. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. Use a brass drift punch. 1955 Cadillac Idle Air Mixture Circuit WCFB Carburetor Cutting Out on Left Hand Turn 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. 1956 Chevrolet Corvette & Super Power Kit Engine Idle Speed, Idle Mixture and Throttle Linkage Adjustment Procedure. Seat the intake check by tapping lightly in the hole to form a good seal. Check throttle linkage to make sure that primary throttle valves come to full wide open position. The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. Carter WCFB 4 Barrel Adjust Float. Fig. There should now be .018 .023 clearance between throttle valve and bore of carburetor (side opposite idle port). 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). 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. Back out throttle screw so that the throttle valve close completly. Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. I have repeated multiple times with same results. They sometimes need trimming. 1956 Plymouth, Powerflite Transmission - Dashpot The dashpot has been eliminated. 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. I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. The suction along with the fuel weight pulls fuel through the intake check via the passage to the fuel bowl. Adjust by bending lip of float, not float arm. 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 Did the old gasket get removed? If a loss of rpm is noted, or if the engine dies, and air leak exists. The lower edge of vent valve cap should be raised above surface of dust cover the distance listed in the. All These Part Numbers Interchange Into Our Part No. Test the needle by holding it down gently with a brass drift punch. 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 accelerator pump circuit resides on the primary side of. The adjustment of the pump is important in order to get the required fuel. The fuel is also conducted through a passage in the air horn to the secondary needle seat. 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. This restricts the flow of fuel. A WGD usually has a pump arm like that of a WCFB (IIRC). Measure from toe B to air horn. Test the fuel pump to be sure it isnt putting out too much pressure. 1955 Chevy Hard starting after flooding. Carter WCFB 4 Barrel Carburetor Float System. If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. They know their stuff and provide technical assistance and guides in both paper and video formats. The mixture screw may be bent, or damaged. Blow through the intake check passage to be sure the passage is open. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. Share. Make sure manifold heat control valve is free. If not, then find the check ball and make sure it is loose. 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. *New Accelerator Pump5. 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 Secondarys are somehow stuck open (which amounts to a vacuum leak). If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. 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 download link can be found on your order confirmation email which you will receive as soon as you complete the order. It's highlighted yellow and will look something like this. They are staked in the hole. Put some fluid in theaccelerator pumpwell and press down on the pump. 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.