Pump Solutions Group Neptune Series 7000 dia-PUMP MODELS 7100 thru 7200 - Manual (Page 10)

10
SECTION III
NORMAL MAINTENANCE
6.0 MAINTENANCE
Under normal conditions, the Mechanical Diaphragm metering pumps should not require any significant
amount of maintenance. It is advised that periodic visual observations be made of the oil level to make sure
that it is over the worm gear. The liquid end of the pump should also be inspected for leakage. These
observations should be made regularly.
The Gear oil should be drained and replaced when necessary, removing the drain plug at the side of the
pump. This change can be scheduled with the normal factory maintenance at seasonal periods.
6.1.0
OIL CHANGE (100% Tufoil)
The recommended oil change intervals are dependent upon the operating environment and
level of pump usage.
6.1.1 Disconnect the power source to the drive motor
6.1.2 Relieve all pressure from the piping system.
6.1.3 Drain the oil by removing the drain plug at the side of the gearbox.
6.1.4
Replace the drain plug.
6.1. 5 Remove breather on the gearbox. (Or snap off the breather top and remove sponge)
6.1.6 Fill with oil up to an inch from the top of the gearbox.
6.1.7 Replace breather. (Or snap on the breather top after replacing sponge)
6.2.0 CHECK VALVE REMOVAL CLEANING AND REPLACEMENT.
Should the valves need cleaning, remove as follows:
6.2.1 Disconnect the power source to the drive motor.
6.2.2 Relieve all pressure from the piping system.
6.2.3 Close the inlet and outlet shutoff valves.
6.2.4 Loosen and remove the suction and discharge valve cartridges slowly to drain any
trapped liquid.
6.2.5 Clean valve cartridges with suitable solvent. Both valve cartridges are complete and
integral units and should not be disassembled for cleaning. If the valves are found to be
worn and in need of replacement, an entire valve cartridge in either suction or discharge
should be ordered.
6.2.6
To replace reverse above procedures. Make sure that the port orientation is right.