Control Valve Assembly

1. Using suitable tool, press out accumulator piston retainer together with piston.

2. Remove accumulator spring and accumulator piston seal.

3. Clean control valve assembly thoroughly in suitable clean solvent, moving valve with pick or small screwdriver to dislodge any dirt or debris that may have accumulated. Air dry.

4. Position control valve on clean surface as shown in figure.

5. Remove valve trains beginning with upper left hand corner, noting the following:

a. Some valves are under pressure, cover bores while removing roll pins.

b. Remove blind hole roll pins with a modified drill bit.

c. Valves, springs and bushings must be laid out on a clean surface in the exact sequence they are removed.

d. Remove all pressure switches, if equipped.

6. Clean all valves, springs, bushings and the control valve body in suitable clean solvent and dry with Compressed air.

7. Inspect valves and bushings for porosity, scoring, nicks and scratches.

8. Inspect springs for damaged or distorted coils.

9. Inspect valve body casting for porosity, cracks, interconnected oil passages and damaged machined surfaces.

10. Assemble control valve assembly components exactly as shown, noting position of valve lands and bushing passages.