Fluke 6270A - Inspect and Replace the CPS Valves

6270A
Service Manual
122
10
1
9
9
11
Vent
Purge
hxn034.eps
Figure 52. CPS Assembly
Inspect and Replace the CPS valves
To inspect and replace the CPS valves, see Figure 53:
1. Separate the lower and upper housing from the chassis as described
previously.
2. Vent the controller to remove all pressure to the CPS.
3. Use a 9/16 inch socket or wrench to remove the retaining nut  for the valve
coil .
4. Remove the coil from the valve base .
5. Use a flat-head screwdriver to remove the valve stem  from the valve base.
6. Ensure the O-ring  remains in the valve base and do not lose the valve
body . Note that the vent valve has a spacer that goes above the valve
body and must be in the vent valve assembly for proper operation.
7. Remove the valve body from the valve stem and inspect the sealing surface
 for any contamination or damage.