18
| 866 Challenger Series
www.natvac.com | 800.253.5500
Ballast Valve Rebuilding
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 Loctite 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
*Since adjustment wasn’t altered, ballast valve should retain previous opening level
REMOVE COVER &
SPRING
BALLAST VALVE
DIAPHRAGM
(120-097-004)
BALLAST VALVE
PROTECTIVE GASKET
(120-095-012)
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 Loctite 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
*Since adjustment wasn’t altered, ballast valve should retain previous opening level
REMOVE COVER &
SPRING
BALLAST VALVE
DIAPHRAGM
(120-097-004)
BALLAST VALVE
PROTECTIVE GASKET
(120-095-012)
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 Loctite 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
*Since adjustment wasn’t altered, ballast valve should retain previous opening level
REMOVE COVER &
SPRING
BALLAST VALVE
DIAPHRAGM
(120-097-004)
BALLAST VALVE
PROTECTIVE GASKET
(120-095-012)
*Since adjustment wasn’t altered, ballast valve should retain
previous opening level