This box did not have a part number. Disassembly2. Carter Carburetor Identification - Carburetor kits, parts and manuals 2: Carter AFB idle mixture and speed adjustment screws. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. 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. Hold air horn upright with floats hanging. This is an electronic rebuild manual, no physical copy will be provided. Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. 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. 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. Blow through the intake check passage to be sure the passage is open. Hold a straight edge across top of dust cover housing, next to the pump arm. Recheck float adjustments. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. 5:04. Each size must be used in its own location. We will contact you as soon as this product is available. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. What more could you ask for? Back out throttle stop screw until throttle valves seat in bores. Fast, secure e-book download. Carter WCFB 4 Barrel Carburetor Float System. The suction along with the fuel weight pulls fuel through the intake check via the passage to the fuel bowl. 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 1956 Plymouth, Powerflite Transmission Dashpot, 1955 Pontiac Loading or Carburetor Flooding, 1956 Pontiac Hard Starting, Partially Warm Engine. A fuel pump cannot be tested by unhooking the line and seeing if gas comes out. *New Float6. Carter 2 Barrel BBD Adjustments - YouTube They sometimes need trimming. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. You should feel some pressure and fluid should not be bypassing the check needle. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. 1957 Lincoln Accelerator Pump Carter Wcfb Fluorelastomer Cup Ethanol 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. GM Corvette 1963-1982 Idle Speed and Mixture Repair Guide Look for breaks in the new gasket, or cracks around the threaded area.The needle could have been damaged while adjusting the floats. THE CARBURETOR SHOP / Carter carburetor special tools Be careful when removing the top of the carburetor that you don't force things and break the piston lever. This E-manual is pictured with the Carter WCFB carburetor with the upper auto choke. The accelerator pump circuit resides on the primary side of this carburetor. Seat the discharge check by tapping lightly in the hole to form a good seal. Can't find the answer you're looking for. Product information . If hard starting still exists change the choke setting to one point lean. Measure from center top surface of pontoons to air horn. 1955 Pontiac - Loading or Carburetor Flooding You cannot go wrong with Mikes carburetor in any way. 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 Carburetor Rebuild - YouTube Low fuel pump pressure always check you motors manual for the correct pressure. 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 Carburetor Most of the single step rods were steel. Will Carter introduced the world's first 4-barrel carburetor, the WCFB (Will Carter Four Barrel) which raised air-flow to unprecedented levels. cm448 Carter WCFB Carburetor Manual - carbkitsource.com With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. When done you should see very little daylight around the valve. Carter WCFB 4 Barrel Carburetor Float System Adjusting the WCFB float level and float drop. Your friend will receive an email from you with a link to our site. A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. 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. Carter Metering Rod Technology - THE CARBURETOR SHOP The idle mixture screws adjust the amount of air/fuel mixture that goes up to the venturi at idle. The fuel is also conducted through a passage in the air horn to the secondary needle seat. The accelerator pump circuit resides on the primary side of. Carter WCFB Carburetor Troubleshooting Coat threads of screw with sealing compound and install it. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB 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. 1: Carter WCFB idle mixture and speed adustment screw location. The cfm of the Carter WCFB four-barrel carburetor is approximately 400. Measure float height as illustrated above. *New Airhorn Gasket7. Outside top of early Carter tool box with correct decal. 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. If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. WCFB carburetors, althqugh basically all units are allke. Do not depress float lip against spring in needle, but let float rest of its own weight. Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. Servicing The Rochester Quadrajet Carburetor - MotorTrend Carburetors equipped with an adjustable bowl vent require adjustment. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). 19591961 Chevrolet Carter WCFB Carburetor Fig. Ultra-Sonic Cleaning3. Carter WCFB 4 Barrel Metering Rod - Mikes Carburetor Parts Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. a. If it is, tap gently with a hammer and the same brass drift punch to seat it, or replace the check weight. Buy REMANUFACTURED CARTER WCFB CARBURETOR 3696S For 1958-1965 Chevrolet Corvette 327 348: Carburetors . This check prevents excessive pressure in the discharge passage during acceleration. Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. 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 (. I have repeated multiple times with same results. With choke valve held closed and fast idle adjusting screw C, or fast idle adjusting tang, on high step of cam. 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. How To Replace the Carter WCFB 4 Barrel Fast Idle Spring? 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. Test the floats in hot water and if you get any bubbles then they are leaking. 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 Carburetor Float System *New Accelerator Pump5. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Test the fuel pump to be sure it isnt putting out too much pressure. 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. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. 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. 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 piston is brass and can be damaged very easily. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. Adjusting the WCFB Metering Rods The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. What Has Been Done to This Carburetor?1. The ends of the connector rod should point to the throttle arm side. Two ports act as calibrated air bleeds. 19591961 Chevrolet Carter WCFB Carburetor All These Part Numbers Interchange Into Our Part No. Probably not since only one butterfly is open. WCFB 4 Barrel Carburetor Float Adjustment parts. When replacing them hold them tight against the wall while tightening the screw. 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. With choke valve held tightly closed, take slack out of linkage and tighten clamp screw on choke lever. Carter WGD Adjustments - Mikes Carburetor Parts DO NOT apply any pressure on the needle. Older kits 30-70s. Carter WCFB Metering Rods - carburetor-parts.com Measure from toe B to air horn. 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 4 Barrel Carburetor Float System. PDF Carter Carb Identification Chart - annualreport.psg.fr 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. This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. New fuel pumps are especially suspect. 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. Put a straight edge across the dust cover as illustrated. Maximum float buoyancy is generally accomplished when the float pontoons are at a 90-degree angle to the fuel valve. The setups data is the same. Make sure there is a check needle below the main discharge. THE CARBURETOR SHOP / Troubleshooting Home - Carburetor Manual Ebooks Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. Rochester and Carter replacement parts are interchangeable. FREE to our customers that buy a rebuild kit. Can you help me out? With the thermostatic coil housing gasket and baffle plate removed, crack throttle valve and hold choke valve closed. Then close throttle. Take the top off and put the pump in the well all the way to the bottom. Could the float bowl actually be the problem? I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. 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 Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. Make sure the pontoons are centered and will not rub the bowl sides. Adjust by bending lip of float, not float arm. Be sure these ports are clear. Ethanol leaves deposits behind that acts like corrosion. When Quadrajet carburetors have Carter's basic four-digit identification number before the letter S, the carburetors are aftermarket replacements. No metering rod gauges are necessary. When the engine gets hot and then is shut off, gas can sometimes overheat and then boil. The correct way is to use a fuel pump pressure gauge. 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. How Do You Look up Carter Carburetor ID Numbers Online? - Reference.com Carter WCFB 4 Barrel Accelerator Pump Circuit - YouTube This eliminates any bog or hesitation when acceleration. All late model WCFB carburetors have three different length bowl cover screws. Pulloffs : CUFWCFB2 $ 0 . The download link can be found on your order confirmation email which you will receive as soon as you complete the order. Is there a pointed check weight in the main discharge hole. Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. 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. 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. 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. Carter Carburetor Manual 1952 Carter WCFBsetting idle - Discussion Forums Also make sure one isnt rubbing on the side. Adjust by bending float arms, making sure both pontoons on each float are the same height. Gasket removed as shown A. The adjustment of the pump is important in order to get the required fuel. 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. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. Loosen the clamp screw A Press. The adjustment of the pump is important in order to get the required fuel. There should be a retainer keeping the check ball in place. With carburetor installed and engine warmed up. Refer to the Adjustment Data Table for adjustment dimensions. There should now be 9/64 clearance between upper edge of choke valve and inner wall of air horn. On 1956 models one point rich. Make sure the air horn contacts the inner wall of the bowl. 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. Rotate throttle stop screw E until engine idle at approx 500 RPM. Check to see that slots in air cleaner gasket line up with vent tubes and do not rotate gasket during installation of air cleaner. Check throttle linkage to make sure that primary throttle valves come to full wide open position. 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 This can be done by looking at the impression on bowl cover gasket. Aspringis inserted in the power piston hole, then the piston. Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! 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. Float drop not set, or fuel pump pressure too low. The Carter AFB uses weights, and therefore never goes out of adjustment. Solid fuel has the 2 tubes pointing up. The all-aluminum AFB (Aluminum Four Barrel) was a big innovation in 1957, and lives on today under the Edelbrock name. The well should fill with fluid. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. Adjust by bending unloader lip on throttle shaft lever. 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. Put some fluid in theaccelerator pumpwell and press down on the pump. To correct, remove carburetor and turn it upside down. Can't find the answer you're looking for? Hold throttle valve wide open and close choke valve as far as possible without forcing. WCFB Carburetor Cutting Out on Left Hand Turn. Can't find the answer you're looking for? Rotate throttle stop screw E until engine idle at approx 500 RPM. I rebuilt a Carter WCFB carburetor with the lower auto choke setup. 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). If not, then find the check ball and make sure it is loose. . 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. Be careful removing the intake check retainer. Inspiration for this arrangement was provided by the federal government through its exhaust emissions regulations. If a loss of rpm is noted, or if the engine dies, and air leak exists. 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. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. You need to run wire down all small passages. Share. Secondarys are somehow stuck open (which amounts to a vacuum leak). They are not meant to fill the hole, only to restrict it. Can't find the answer you're looking for? As for the pump not squirting.I suspect the pump well isnt filling up. This circuit provides a measured amount of fuel when needed on acceleration until the vacuum and main circuit can take over. Carter WCFB Build Sheets To correct, remove carburetor and tighten throttle lever by either peening end of shaft over, or soldering end of shaft to throttle lever.

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