Troubleshooting guide
18
72-001-02 Rev A
6.3.2 Check Valve Removal & Reinstallation, Cartridge type
Valving that is of the cartridge design is intended to be replaced as an assembly.
1. Disconnect the power source to the drive motor.
2. Relieve all pressure from the piping system.
3. Take all precautions necessary to prevent contamination to the environment and personnel exposure
to hazardous materials.
4. Close the inlet and outlet shutoff valves.
5. Disconnect the suction piping at the installed union near the suction port.
6. Loosen and remove the suction valve cartridge slowly to drain any liquid from the reagent head.
7. Disconnect the discharge piping at the installed union near the discharge port.
8. Loosen and remove the discharge valve cartridge slowly to drain any trapped liquid.
9. Reinstall both new valve assemblies, taking care to ensure that they are in the correct ports.
Do not coat the threads of the cartridge valve with a pipe sealant. Each valve cartridge should be
tightened only until the o-ring seal makes good contact with the reagent head surface. Over-
tightening will cause damage and result in leaks
10. Reinstall both suction and discharge piping. Secure the cartridge while making your external
connections to prevent rotating the cartridge and over-tightening it into the pump.
6.4 Motor Removal & Reinstallation
1. Disconnect the power source to the drive motor.
2. Disconnect the motor wiring from the motor.
3. Remove the four bolts retaining the motor to the motor adaptor.
The motor shaft fits into a bore on the pump input shaft.
4. Slide the motor shaft out of the pump input shaft.
Be careful not to lift the pump input shaft up out of the pump.
5. Apply a lubricant such as Loctite™ Silver Grade® Anti-seize paste
(or similar) to the motor shaft and key before reassembling..
6. Reinstall the motor by sliding the motor shaft into the pump input
shaft.
7. Insert and tighten the four bolts removed in step 3.
8. Reconnect the motor wiring to the motor.
9. Connect power to the drive motor.
Figure 11, motor mounting
Motor rotation must be wired for CW rotation, as viewed from the top of the motor, as noted by the
arrow on the top of the pump housing.