K 3500 Truck 4WD V8-393 6.5L DSL Turbo (1993)
Too much lapping of the valve will cause excessive clearances and increase the chance of a valve not operating.
Accumulator Housing Assembly
CLEAN:
1. Control valve assembly and accumulator housing thoroughly in clean solvent.
2. Air dry
Disassemble Control Valve/Accumulator Housing:
1. Position on a clean surface
2. Remove valve trains and accumulator pistons
WARNING: Some valves are under pressure, cover the bores while removing the roll pins or personal injury could result.
4. Remove blind hole roll pins with a modified drill bit
5. Valves, springs, bushings and pistons must be laid out on a clean surface in the exact sequence they are removed.
CLEAN:
1. All valves, springs, bushings, pistons, control valve body and accumulator housing in clean solvent
2. Dry using compressed air
INSPECT:
1. All valves, pistons, and bushings for porosity, scoring, nicks or scratches.
2. Check pistons for seal damage
3. Check springs for damaged or distorted coils
4. Inspect valve body casting a accumulator housing for porosity, cracks, interconnected passages and damaged machined surfaces
5. Solenoid, connectors and switches.
