Pump Solutions Group Neptune Series 500 MODEL 481 THRU 547 - Manual (Page 13)

10
SECTION III
NORMAL MAINTENANCE AND DISASSEMBLY INSTRUCTIONS
9.0 MAINTENANCE
Under normal conditions, the “dia-Pump”does not require any significant amount of maintenance. It is
advised that periodic visual observations be made of the oil level. See Page 5 for correct oil level. The liquid
end of the pump should also be inspected for leakage. These observations should be made regularly, at
least every 48 hours.
10.0 REMOVAL OF VALVE CARTRIDGES (See page 27 for SERIES 500-E; Page 30 for 500-V)
The “dia-Pump” incorporates a unique check valve design whereas the discharge and suction piping NEED
NOT be disturbed in order to service the valve cartridges.
Should the valves need cleaning, remove as follows:
10.0.1 Suction Valve: Remove Suction Valve Cap (FIG. #550) and using Allen Wrench provided, remove
Suction Valve Cartridge (FIG. #544).
NOTE
PVC Head Pump – Remove Suction Valve Cap (P/N 000256) by removing the Valve Cap Screws
(P/N 100250) and remove Suction Valve Cartridge (P/N 000259) using the special round lug tool
provided. Caution: PVC is fragile – do not use excessive force.
10.0.2 For removal of discharge valve, refer to instruction in Section II, Paragraph 7.0.2.
10.0.3 Please refer to Figures VI and VII showing valve cartridge removal.
11.0 CLEANING OF VALVE CARTRIDGES
11.0.1 The valve cartridge is a complete and integral unit and should not be disassembled for cleaning. If
the valves are found to be worn and in need of replacement, an entire valve cartridge, either suction
or discharge, should be ordered. The suction valve is the longer of the two valve cartridges.
11.0.2 To clean the valve cartridges, soak in strong detergent and then blow dry with compressed air.
12.0 REPLACING OF VALVE CARTRIDGES (See page 27 for SERIES 500-E)
12.0.1 Be certain that the Valve Seat “O” Ring (FIG. #549 for Metal Head Pumps, P/N 100185 for PVC
Head Pumps) is removed with the valve and that no other foreign matter is in the valve cavity.
Use a small amount of grease to hold the “O” ring in the groove in the end of the valve cartridge on
reassembly.
Reverse the procedure used to remove the valve cartridge. Do not over-tighten valve cartridge. Firm
tightening is enough to cause the “O” Ring to seal.