Make sure manifold heat control valve is free. If a loss of rpm is noted, or if the engine dies, and air leak exists. 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). parts. The ends of the connector rod should point to the throttle arm side. Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. Use a brass drift punch. 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 You may even have to resort to finding a used WCFB carburetor. Adjust by bending lip of float, not float arm. 1955 Chevy Hard starting after flooding. 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. Outside top of early Carter tool box with correct decal. Two ports act as calibrated air bleeds. This restricts the flow of fuel. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. With the thermostatic coil housing gasket and baffle plate removed, crack throttle valve and hold choke valve closed. The fuel is also conducted through a passage in the air horn to the secondary needle seat. Can't find the answer you're looking for? This eliminates any bog or hesitation when acceleration. Check throttle linkage to make sure that primary throttle valves come to full wide open position. 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. Product information . When replacing them hold them tight against the wall while tightening the screw. The well should fill with fluid. Piston force is too much for linkage. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. 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. To correct, remove carburetor and turn it upside down. Coat threads of screw with sealing compound and install it. Measure from toe B to air horn. 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. 19591961 Chevrolet Carter WCFB Carburetor All These Part Numbers Interchange Into Our Part No. How to clean the Jeep Carter BBD carb Idle jets - Duration: 7:14. 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 . Be sure these ports are clear. When done you should see very little daylight around the valve. Good quality print. Make sure the pontoons are centered and will not rub the bowl sides. When removing valves they should be marked so that they get put back the same way. William C. Carter was born in Union City Tennessee in 1884. The bowl vent is used to vent the float bowl, otherwise a siphoning of the gas can occur. 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. Notice holes from which linkage rods are removed so they can Inspiration for this arrangement was provided by the federal government through its exhaust emissions regulations. Someone has installed it improperly. 1: Carter WCFB idle mixture and speed adustment screw location. These diagrams include: Fig. 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. Put a straight edge across the dust cover as illustrated. Back out the throttle lever set screw (idle screw) to allow throttle valves to seat in the bores of the carburetor. Be careful when removing the top of the carburetor that you don't force things and break the piston lever. Fig. One is in the secondary venturi and the other just above the throttle plate. 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. You can also check the adjustment by measuring (F) which should be 18/64. Float drop not set, or fuel pump pressure too low. The fuel is also conducted through a passage in the air horn to the secondary needle seat. BBS) and were basically an on/off condition similar to the function of a power valve. 41-108N Carter 2818S Carter 3059S What Has Been Done to This Carburetor?1. On 1956 models one point rich. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. Carter WCFB Build Sheets If it is, tap gently with a hammer and the same brass drift punch to seat it, or replace the check weight. Can't find the answer you're looking for? Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. WCFB carburetors, althqugh basically all units are allke. Probably not since only one butterfly is open. With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. 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 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. If not, then find the check ball and make sure it is loose. Adjusting the WCFB Metering Rods The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. I. DISASSEMBLY. I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. Ultra-Sonic Cleaning3. You will need to check your motors manual for the spec, but around 4 or 5 should be plenty. The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. Ideas?? 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. Check the low speed jets to make sure they are clear (#44). A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. Most of the single step rods were steel. Enter Carb Number. Carter WCFB Accelerator Pump Quick test to see if the accelerator pump is working. One of the butterflies is open about 1/8 with the carburetor dis assembled. New fuel pumps are especially suspect. 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. Some have a coating to give it a better shelf life. Any pressure put on the needle will damage it. The download link can be found on your order confirmation email which you will receive as soon as you complete the order. Some models have a pump relief check in the bottom of the fuel bowl. With choke valve held closed and fast idle adjusting screw C, or fast idle adjusting tang, on high step of cam. The flat surface of the pump arm should be parallel to the straight edge. You need to run wire down all small passages. Anti-Rust "Dichromate" Finish**4. They need to be centered in the bowl.Fuel could be leaking around the needle & seat. The flat on top of the pump arm should be parallel to the straight edge. 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. Is there a pointed check weight in the main discharge hole. Your friend will receive an email from you with a link to our site. cm448. Back out throttle lever set screw until throttle valves seat in bores of carburetor. The lower edge of vent valve cap should be raised above surface of dust cover the distance listed in the. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. 1955 Pontiac - Loading or Carburetor Flooding Hold throttle valve wide open and close choke valve as far as possible without forcing. 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. Each size must be used in its own location. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. 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 most complete document I have found. Carter used metering rods with a single step, 2-step, 3-step, and 4-step. 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. but if it runs well you don't really need to make any adjustments. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Then close throttle. With throttle valves seated in bores, dust cover and gasket in place. 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 (. Why Doesn't Adjusting Idle Mixture Screws Make any Difference? You should feel some pressure and fluid should not be bypassing the check needle. 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. 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. Blowing out passages will not get them clean enough. 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. Turn knurled nut of gauge until finger on gauge just touches top of plunger shaft (A). Measure float height as illustrated above. The download link will expire in 30 days. It needs about 4 lbs of pressure. Carter WCFB 4 Barrel Carburetor Float System. Seat the discharge check by tapping lightly in the hole to form a good seal. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. 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). 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 Also make sure one isnt rubbing on the side. b. They know their stuff and provide technical assistance and guides in both paper and video formats. 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. Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. Make sure these are clear if you have percolation problems. Carter WCFB 4 Barrel Carburetor Float System. 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. (note) The metering rods will fit into the jets loosely. In this video I show you how to replace the fast idle spring on the WCFB carburetor. The cfm of the Carter WCFB four-barrel carburetor is approximately 400. Could the float bowl actually be the problem? During high speed operation a vacuum exists at the pump jets. 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. DO NOT apply any pressure on the needle. Can't find the answer you're looking for? Press down on vacuum piston link C until metering rods bottom in the carburetor body. Can't find the answer you're looking for? Carburetors equipped with an adjustable bowl vent require adjustment. The file is in PDF format, you can download and save/print a copy. To correct, remove carburetor and turn it upside down.