Emerson 788 DVC manual Cylinder Reassembly, Cylinder Assembly Removal

D E C 2012 DANIELTM MODEL 788DVC DIGITAL CONTROL VALVES

5.3Cylinder Reassembly

Refer to Figure 5-2.

1.Inspect all O-rings for wear and damage and replace as required.

2.If removed, attach the cylinder head to the main cylinder body.

3.Insert the valve spring into the cylinder housing.

4.Inspect and position the piston into the cylinder housing.

5.Insert the fabricated sleeve over the valve piston and spring assembly. Once fully compressed, block the spring following the procedure used in step 3 of the Disassembly procedure.

6.Inspect and reposition the seat O-ring.

7.Replace seating and retaining ring. Once the entire retaining ring is in its’ groove, position a punch or screwdriver over the end of the ring and tap sharply. This will seat the ring.

8.Again, using CAUTION, apply pressure to the valve piston and remove the block. Carefully relieve the tension on the spring until it is properly resting against the seat ring.

9.Reinstall the cylinder assembly in the valve body being careful to properly seat O-rings and secure in place using lock nuts.

Figure 5-2. Cylinder Assembly Removal

5-4 DISASSEMBLY AND REASSEMBLY