7
9. Maintenance
9.1
Maintenance Notes
The O-ring seals used in the check valve and ADV are critical to product containment and pump
operation. All o-rings should be inspected carefully and any that show signs of damage or wear
should be replaced. The owner may wish to replace these seals any time the ADV assembly is
removed from the pump.
A complete cartridge seal assembly is available to the owner as a separate repair part. If necessary, the
complete ADV assembly is available as a repair item.
9.2
Auto De-gas Valve Seal Kit Replacement (NP999130-000)
CAUTION
: Take all precautions to prevent environmental and personnel exposure to hazardous materials.
Any product being pumped will be released during this procedure.
1. Disconnect the power source to the pump drive motor and ADV.
2. Relieve all pressure from the piping system and follow safety requirements for contact / exposure to the
fluid being pumped.
3.
Remove Cap Nut from front of solenoid and slide off solenoid.
4.
Loosen and remove the Union Nut. At this point fluid being pumped may be released from the
assembly.
5.
Remove Core Tube Assembly.
