Control Valve Assembly: Inspection
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.
Clean and inspect all parts. If burrs are present on valves, remove with a fine stone. Use care not to round off shoulders of valves. Ensure valves slide freely by their own weight.
NOTE:
DO NOT
remove Teflon oil seal from front accumulator piston unless seal ring needs replacing. Service oil seal ring is cast iron.