Aspringis inserted in the power piston hole, then the piston. Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. 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. 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. They are staked in the hole. To correct, remove carburetor and turn it upside down. DO NOT apply any pressure on the needle. Adjust idle screws D to produce a smooth idle of correct speed is obtained. A fuel pump cannot be tested by unhooking the line and seeing if gas comes out. Make sure the pump relief check is clean. When I slow down to an idle, my engine runs rough. As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. What Has Been Done to This Carburetor?1. As for the pump not squirting.I suspect the pump well isnt filling up. Look for breaks in the new gasket, or cracks around the threaded area.The needle could have been damaged while adjusting the floats. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). Carter used metering rods with a single step, 2-step, 3-step, and 4-step. I have repeated multiple times with same results. The correct way is to use a fuel pump pressure gauge. 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. The accelerator pump circuit resides on the primary side of this carburetor. Any pressure put on the needle will damage it. Carter WCFB Accelerator Pump Quick test to see if the accelerator pump is working. Gasket between bowl and base is installed backwards (easy to do). In this video I show you how to replace the fast idle spring on the WCFB carburetor. Place the choke housing toward the left and remove upper right main body to throttle body screw. This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. When that is the case, I bend the accel. The Carter AFB uses weights, and therefore never goes out of adjustment. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. Why Doesn't Adjusting Idle Mixture Screws Make any Difference? Probably around 4- 4.5lbs. 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 metering rod adjustment should be done after the pump adjustment. 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 . Rochester and Carter replacement parts are interchangeable. Make sure the pontoons are centered and will not rub the bowl sides. Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. Fast, secure e-book download. 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. Change the choke setting to index. 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. Check to see that slots in air cleaner gasket line up with vent tubes and do not rotate gasket during installation of air cleaner. Ideas?? Other than that, great company to deal with. You may even have to resort to finding a used WCFB carburetor. This restricts the flow of fuel. Can't find the answer you're looking for. 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? (note) The metering rods will fit into the jets loosely. One is in the secondary venturi and the other just above the throttle plate. 19591961 Chevrolet Carter WCFB Carburetor All These Part Numbers Interchange Into Our Part No. However, it is very similar and I found it very useful. Use a brass drift punch. If it is, tap gently with a hammer and the same brass drift punch to seat it, or replace the check weight. This circuit provides a measured amount of fuel when needed on acceleration until the vacuum and main circuit can take over. With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. parts. 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. Hold a straight edge across top of dust cover housing, next to the pump arm. Recheck float adjustments. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. 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 This is an electronic rebuild manual, no physical copy will be provided. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. Seat the intake check by tapping lightly in the hole to form a good seal. Can't find the answer you're looking for? The accelerator pump circuit resides on the primary side of. The most complete document I have found. If hard starting still exists change the choke setting to one point lean. 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 . Recheck unloader settings with carburetor on the engine. A WGD usually has a pump arm like that of a WCFB (IIRC). Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. Carter WCFB Carburetor Catalog Free WCFB Carburetor Manuals These manuals contain specifications, parts lists and instructions.The manuals can also be used to help identify those carburetors without tags. 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. Adjust by bending throttle connector rod at deepest angle as shown. Carter WCFB Fast Idle With carburetor installed and engine warmed up. b. Both valves should be closed. Measure float height as illustrated above. Though fuel float bowl full, cant get gas into the accelerator pump chamber of the carb. One of the butterflies is open about 1/8 with the carburetor dis assembled. Metering rods for the WCFB have been out of production for several years now. 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. When replacing them hold them tight against the wall while tightening the screw. Check throttle linkage to make sure that primary throttle valves come to full wide open position. Did the old gasket get removed? Be sure these ports are clear. 1st check to make sure the fast idle linkage isnt holding the valves open. If not, then find the check ball and make sure it is loose. Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! 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. The flat surface of the pump arm should be parallel to the straight edge. 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. No metering rod gauges are necessary. A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. Two ports act as calibrated air bleeds. Do not depress float lip against spring in needle, but let float rest of its own weight. Technical Details. Refer to the Adjustment Data Table for adjustment dimensions. If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. 1: Carter WCFB idle mixture and speed adustment screw location. The high speed air bleed and the secondary bleed tube also acts as an anti-percolator. It should not be opened up. Place the choke housing toward the left and remove upper right main body to throttle body screw. Quick test to see if the accelerator pump is working. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. 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. Adjust by bending float arms, making sure both pontoons on each float are the same height. The single step rods were used on some of the price leader carburetors (i.e. Your friend will receive an email from you with a link to our site. Anti-Rust "Dichromate" Finish**4. If not then clean it and try again. 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 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). Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. 41-108N Carter 2818S Carter 3059S What Has Been Done to This Carburetor?1. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. Low fuel pump pressure always check you motors manual for the correct pressure. To correct, remove carburetor and turn it upside down. The metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. 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 Test the fuel pump to be sure it isnt putting out too much pressure. 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. Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. Can you help me out? At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. 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 Clogged idle tube, or passages in the idle circuit. Carter WCFB, 4 barrel metering rod adjustment instructions. Carter WCFB 4 Barrel Carburetor Float System. Solid fuel has the 2 tubes pointing up. New fuel pumps are especially suspect. Back out the throttle lever set screw (idle screw) to allow throttle valves to seat in the bores of the carburetor. 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. 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. I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. Make sure the air cleaner gasket does not block the bowl vents. 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. Be careful removing the intake check retainer. This restricts the flow of fuel. Notice holes from which linkage rods are removed so they can Find many great new & used options and get the best deals for 19571958 Plymouth Fury Carter WCFB Carburetor *Remanufactured at the best online prices at eBay! Measure from toe B to air horn. All These Part Numbers Interchange Into Our Part No. cm448: Ebook carburetor service manual - 341 pages, 272 MBytes, pdf format. With the thermostatic coil housing gasket and baffle plate removed, crack throttle valve and hold choke valve closed. You should feel some pressure and fluid should not be bypassing the check needle. With carburetor installed and engine warmed up. Hold air horn upright with floats hanging. Seat the discharge check by tapping lightly in the hole to form a good seal. Do not depress float lip against spring in needle, but let float rest of its own weight. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. Sometimes scraping around the edges with an awl will remove the staking. 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. Blowing out passages will not get them clean enough. Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down.
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