Control Valve Assembly: Disassembly
WARNING: This page does not describe the selected car, but rather 124 other vehicles, including the 1991 Chevrolet Pickup, 1991 Chevrolet Cab & Chassis, 1988 GMC Vandura Special, 1988 GMC Vandura, and 1988 GMC Value Van. However, it is still accessible from the selected car via links, so may be relevant.
- Position control valve assembly with gasket surface up and accumulator pocket at bottom. Remove manual valve from upper bore. Install Compressor (J-21885) on accumulator piston. Compress piston and remove "E" retaining ring. Remove piston and spring.
- Remove retaining pins (except grooved pin in lower left bore) from bores with pin punch. Drive pins from outer side of valve body. When removing pins, hold hand over bore end in case spring forces components out of bore. See Fig 1 and Fig 2 . Remove grooved pin from lower left bore with long nose pliers. Remove valve trains beginning with upper left corner.