People often ask me which brake valve kit they need to rebuild a particular valve. I'll try to summarize the kits by application here.
This document describes how to rebuild the 1993 - 1996 GM 10223533 (ACDelco part number 172-2104) combination brake valve using a new seal kit available from Muscle Car Research LLC. Tools needed:
This Kelsey-Hayes combination brake valve was removed from a 1995 Chevrolet Caprice. According to my parts catalog the original applications include 1994, 1995, and 1996 GM B-bodies (Buick Roadmaster, Chevrolet Caprice, and Chevrolet Impala SS) and 1993 - 1996 GM D-bodies (Cadillac Fleetwood Brougham) with anti-lock brakes. The original GM part number for this valve is 10223533; that number is stamped on the body of the valve. The ACDelco part number is 172-2104. You can click on the pictures below to see larger versions of the images.
When disassembling a brake valve it's not uncommon to find an internal component that can't be easily pulled or pushed out using mechanical pressure. Heat from a propane torch coupled with compressed air sometimes works, but when can you do when compressed air doesn't get the job done, either? I've found that using hydraulic pressure will typically do the trick, and it's relatively easy to apply hydraulic pressure using a common grease gun. The challenge is connecting your grease gun to the ports on your brake valve. How can it be done?
This document describes how to rebuild the 1970 - 1971 Mopar 3466156 and 3466157 brass metering/hold-off brake valves manufactured by Kelsey-Hayes using a new seal kit available from Muscle Car Research LLC. The same basic part was also used on 1968 - 1969 full-sized Ford police cars and taxis (part number C7VY-2B161-B), 1970 - 1971 Ford Galaxies and Thunderbirds (part number D0AZ-2B161-B) and 1968 - 1972 Ford F250 and F350 trucks (part number C8TZ-2B161-A). Tools needed:
When faced with a leaking brake valve, many adventurous home mechanics follow the same path I did and wonder if it's possible to rebuild the valve. Many valves can indeed be rebuilt, but it's important to understand that it can't usually be done using seals found at your local parts store. That's because the Nitrile/Buna-N or Viton (a fluoroelastomer) rubber compounds used in o-rings and other seals found in "over the counter" kits aren't compatible with automotive brake fluid - they're designed to be compatible with petroleum-based fluids like engine oil and gasoline!
This document describes how to rebuild the Kelsey-Hayes 86652 combination brake valve using a new rebuild kit available from Muscle Car Research LLC. Tools needed:
This Kelsey-Hayes combination brake valve includes pressure differential and metering functions. It does not include any parts to provide proportioning functionality. I was told that it was originally used on a 1973 Dodge motor home. One side is marked KH 86652.
This document describes how to rebuild the 1996 - 1997 Ford Thunderbird and Mercury Cougar brake pressure control valve (marked F6SC2B091CA) using a new seal kit available from Muscle Car Research LLC. Tools needed:
This brake pressure proportioning valve (Ford calls it a "brake pressure reducing valve") was removed from a 1997 Ford Thunderbird. It is marked "F6SC2B091CA"; the service part number is F6SZ-2B091-CA. Original applications include the 1996 and 1997 Ford Thunderbird and Mercury Cougar. You can click on the pictures below to see larger versions of the images.