866 Challenger Series |
17
www.natvac.com | 800.253.5500
Ballast Valve Rebuilding
If, from the troubleshooting guide shown previously, a ballast valve is
determined to require rebuild, a rebuilding kit can be obtained from NVE.
This kit will include all the components necessary to rebuild the ballast
valve. The ballast valves have been designed to be field rebuild-able. The
procedure is shown below:
1�
Remove the ballast valve vacuum line from the ballast valve cover
(1/2” Wrench).
2�
Remove the six socket head bolts from the ballast valve cover.
Caution: The cover will be under slight spring tension
3�
Remove cover carefully (spring should stay in cover).
4�
Remove plunger assembly from ballast valve.
5�
Remove nut from plunger assembly and disassemble.
6�
Replace ballast valve diaphragm and the ballast valve protective
gasket and reassemble plunger assembly.
7�
Place a small amount of Loc-tite on threads and an mating face of
nut and tighten.
8�
Ensure plunger sealing face and internal housing sealing face are
free of burrs.
9�
Insert plunger assembly back into ballast valve housing.
10. Place spring in the cover pilot, align JIC fitting downward and close
to the pump, and replace cover.
Note: Spring tension will have to be overcome to start bolts
Important: The shorter bolt goes in the 6 o’clock position
11. Tighten bolts evenly.
12. Remove and replace the boss plug in the ballast valve cover.
