a. This is percolation. Adjust by bending arm (J) on choke trip lever. Put a straight edge across the dust cover as illustrated. Back out throttle screw so that the throttle valve close completly. Rotate throttle stop screw E until engine idle at approx 500 RPM. Adjusting the WCFB float level and float drop. What Has Been Done to This Carburetor?1. This is an electronic rebuild manual, no physical copy will be provided. Carter WCFB 4 Barrel Carburetor Float System. BBS) and were basically an on/off condition similar to the function of a power valve. WCFB carburetors, althqugh basically all units are allke. We will contact you as soon as this product is available. Note te larger box, and the number of additional tools from the 1935 set. 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). Blowing out passages will not get them clean enough. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. Adjusting the WCFB Metering Rods The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. 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. All These Part Numbers Interchange Into Our Part No. They sometimes need trimming. Watch on. They know their stuff and provide technical assistance and guides in both paper and video formats. Fig. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. cm448: Ebook carburetor service manual - 341 pages, 272 MBytes, pdf format. Shorter and smaller overall than the 4GC Rochester, the WCFB was the right choice for dual-quads on a compact . This restricts the flow of fuel. With choke valve held closed and fast idle adjusting screw C, or fast idle adjusting tang, on high step of cam. b. This eliminates any bog or hesitation when acceleration. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Enter Carb Number. When done you should see very little daylight around the valve. Gasket removed as shown A. Fig. Other than that, great company to deal with. The piston is brass and can be damaged very easily. Carter WCFB 4 Barrel Carburetor Float System. A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. When replacing them hold them tight against the wall while tightening the screw. Sometimes scraping around the edges with an awl will remove the staking. Hold in place and carefully tighten metering rod arm set screw (G). 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 Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. 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 The idle mixture screws adjust the amount of air/fuel mixture that goes up to the venturi at idle. 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. The most complete document I have found. Install the pump connector rod (D) in the outer hole, long stroke. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. Make sure the ball rattles. 60 pages of great info. 1956 Chevrolet Corvette & Super Power Kit Engine Idle Speed, Idle Mixture and Throttle Linkage Adjustment Procedure. Carter WCFB Build Sheets The file is in PDF format, you can download and save/print a copy. Make sure the air cleaner gasket does not block the bowl vents. How to clean the Jeep Carter BBD carb Idle jets - Duration: 7:14. 1956 Plymouth, Powerflite Transmission Dashpot, 1955 Pontiac Loading or Carburetor Flooding, 1956 Pontiac Hard Starting, Partially Warm Engine. Tyler's Forgotten Car Rescue 22,933 views. 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. This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. 19591961 Chevrolet Carter WCFB Carburetor All These Part Numbers Interchange Into Our Part No. With choke valve held tightly closed, take slack out of linkage and tighten clamp screw on choke lever. Secondarys are somehow stuck open (which amounts to a vacuum leak). 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. Gasket removed. These diagrams include: Fig. Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. The item you are trying to purchase is currently out of stock.Please enter your name, email, and phone number below. Could the float bowl actually be the problem? Be sure these ports are clear. The setups data is the same. From my experience it is the most complete and comprehensive source for all things carburetor, encompassing a massive spectrum of makes models and applications. 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. Free shipping for many products! 1955 Cadillac Idle Air Mixture Circuit WCFB Carburetor Cutting Out on Left Hand Turn 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. 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. When removing valves they should be marked so that they get put back the same way. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Add a couple drops of oil to the leather. 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. Gasket between bowl and base is installed backwards (easy to do). Technical Details. Use a brass drift punch. 1956 Plymouth, Powerflite Transmission - Dashpot The dashpot has been eliminated. The discharge check is seated at this time to prevent air being drawn into the pump well. Then close throttle. 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. The adjustment of the pump is important in order to get the required fuel. Ideas?? 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. 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. Make sure manifold heat control valve is free. During high speed operation a vacuum exists at the pump jets. 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. Rotate throttle stop screw E until engine idle at approx 500 RPM. Carter WCFB Fast Idle With carburetor installed and engine warmed up. Coat threads of screw with sealing compound and install it. 1955 Chevy Hard starting after flooding. William C. Carter was born in Union City Tennessee in 1884. Clogged idle tube, or passages in the idle circuit. Can't find the answer you're looking for? Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! 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. Make sure the air horn contacts the inner wall of the bowl. Correct by removing any burrs or nicks. The ends of the connector rod should point to the throttle arm side. If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. cm448. I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. It should not be opened up. Everyone Has Started an Engine in the . 41-108N Carter 2818S Carter 3059S What Has Been Done to This Carburetor?1. Can't find the answer you're looking for? 1955 Pontiac - Loading or Carburetor Flooding Check throttle linkage to make sure that primary throttle valves come to full wide open position. Probably not since only one butterfly is open. Make sure there is a check needle below the main discharge. One is in the secondary venturi and the other just above the throttle plate. All late model WCFB carburetors have three different length bowl cover screws. New fuel pumps are especially suspect. There should now be 9/64 clearance between upper edge of choke valve and inner wall of air horn. Each size must be used in its own location. If a loss of rpm is noted, or if the engine dies, and air leak exists. but if it runs well you don't really need to make any adjustments. The vacuum piston is no longer produced and can only be found as a NOS piece, or used. 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 Disassembly2. The cfm of the Carter WCFB four-barrel carburetor is approximately 400. Carter WCFB 4 Barrel Carburetor Float System Adjusting the WCFB float level and float drop. Older kits 30-70s. Back out throttle lever set screw until throttle valves seat in bores of carburetor. How to Adjust a Carter BBD 2 Barrel | It Still Runs The Carter carburetor has been around for a very long time. DO NOT apply any pressure on the needle. Ethanol gas does not have much if any lubrication. If hard starting still exists change the choke setting to one point lean. Is there a pointed check weight in the main discharge hole. 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. He only had 5-years of formal education and in 1909, he founded the Carter Carburetor Manufacturing Co in St. Louis. If not, then find the check ball and make sure it is loose. Adjust by bending lip of float, not float arm. You cannot go wrong with Mikes carburetor in any way. They work fine when I push hard down on the piston. 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. On the WCFB the check ball is usually at the bottom of the pump well. Can you help me out? Disassembly2. 3: Holley 4150 idle mixture and speed adjustment screws. When Quadrajet carburetors have Carter's basic four-digit identification number before the letter S, the carburetors are aftermarket replacements. Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. Though fuel float bowl full, cant get gas into the accelerator pump chamber of the carb. Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. Carter used metering rods with a single step, 2-step, 3-step, and 4-step. Probably around 4- 4.5lbs. 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. 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. Float drop not set, or fuel pump pressure too low. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). When I slow down to an idle, my engine runs rough. Carter WCFB Rebuild kits: Rebuild Kits. Some models have a pump relief check in the bottom of the fuel bowl. Check any vents to make sure they are open. Any bubbles indicates a leak.Make sure the 2 floats are the same height. With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. 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 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 Coat threads of screw with sealing compound and install it. This box did not have a part number. Can't find the answer you're looking for? The suction along with the fuel weight pulls fuel through the intake check via the passage to the fuel bowl. I rebuilt a Carter WCFB carburetor with the lower auto choke setup. As the spring fatigues, the air valve will open too soon, creating an instantaneous lean condition, and a bog. Measure from center top surface of pontoons to air horn. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. Press down on vacuum piston link C until metering rods bottom in the carburetor body. Did the old gasket get removed? The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. What more could you ask for? Someone has installed it improperly. Includes theory, diagrams, detailed specifications, tune-up data and complete overhaul procedures. 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. Notice holes from which linkage rods are removed so they can Hold a straight edge across top of dust cover housing, next to the pump arm. Must be made after fast idle adjustment. You should feel some pressure and fluid should not be bypassing the check needle. A fuel pump cannot be tested by unhooking the line and seeing if gas comes out. 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. 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. Adjust idle screws D to produce a smooth idle of correct speed is obtained. You may even have to resort to finding a used WCFB carburetor. 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. This restricts the flow of fuel. 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. Low fuel pump pressure always check you motors manual for the correct pressure. Be careful when removing the top of the carburetor that you don't force things and break the piston lever. 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. Measure from toe B to air horn. With carburetor installed and engine warmed up. Fast, secure e-book download. The bowl vent is used to vent the float bowl, otherwise a siphoning of the gas can occur. 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). 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. 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. I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). Product information . 2: Carter AFB idle mixture and speed adjustment screws. Run a blunt object around the inside of the leather cup to make sure any coating is broken. You need to run wire down all small passages. Share. When looking to replace your metering rod keep in mind that Carter used several different lengths of rods in the WCFB. Carter WCFB, 4 barrel metering rod adjustment instructions. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. Ultra-Sonic Cleaning3. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. Carter WCFB Metering Rods 4,292 views Jul 15, 2018 28 Dislike Share Save Mikes Carburetor 18.7K subscribers https://www.carburetor-part.com is providing this video about the Carter WCFB 4. 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 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. Place the choke housing toward the left and remove upper right main body to throttle body screw. Can't find the answer you're looking for? If it is, tap gently with a hammer and the same brass drift punch to seat it, or replace the check weight. I. DISASSEMBLY. 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. Hold throttle valve wide open and close choke valve as far as possible without forcing. 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. 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. No metering rod gauges are necessary. Check the low speed jets to make sure they are clear (#44). Put some fluid in theaccelerator pumpwell and press down on the pump. This check prevents excessive pressure in the discharge passage during acceleration. I have repeated multiple times with same results. Recheck float adjustments. Why Doesn't Adjusting Idle Mixture Screws Make any Difference? They are not meant to fill the hole, only to restrict it. Can't find the answer you're looking for. It's highlighted yellow and will look something like this. Carburetors equipped with an adjustable bowl vent require adjustment. 5:04. The metering rod adjustment should be done after the pump adjustment. Most of the single step rods were steel. Test the fuel pump to be sure it isnt putting out too much pressure. The flat surface of the pump arm should be parallel to the straight edge. Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. Solid fuel has the 2 tubes pointing up. When the engine gets hot and then is shut off, gas can sometimes overheat and then boil. One of the butterflies is open about 1/8 with the carburetor dis assembled. Good quality print. The download link can be found on your order confirmation email which you will receive as soon as you complete the order. Adjust by bending throttle connector rod at deepest angle as shown. 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 . 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. The metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. The download link will expire in 30 days. Watch this. It needs about 4 lbs of pressure. This circuit provides a measured amount of fuel when needed on acceleration until the vacuum and main circuit can take over. Your friend will receive an email from you with a link to our site. Back off the idle screw so that the throttle plates close completely. Adjust by bending lip of float, not float arm. See figure 9F-2. 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. Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. In this video I show you how to replace the fast idle spring on the WCFB carburetor. This is an electronic rebuild manual, no physical copy will be provided. *New Accelerator Pump5. Seat the discharge check by tapping lightly in the hole to form a good seal. 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. As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. The correct way is to use a fuel pump pressure gauge. The carburetor will flood. The flat on top of the pump arm should be parallel to the straight edge. The WCFB carburetor which came on some of the earliest Measure float height as illustrated above. Do not depress float lip against spring in needle, but let float rest of its own weight. Press down on the vacummeter link (H) until the metering rods bottom in the carburetor body (J). parts. The well should fill with fluid. Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. Please complete the fields below to send your friend a link to this product. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. With the thermostatic coil housing gasket and baffle plate removed, crack throttle valve and hold choke valve closed. 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.
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