User Manual

29
Maintenance
Maintenance precautions
WARNING
!
• Ensure that nobody other than the operators and control personnel will operate the pump.
• Take steps to ensure that the power will not be turned on during the course of work. Hang a sign on the
power switch indicating that work is in progress.
• Do not operate the pump with wet hands. Doing so may result in electric shocks.
• When trouble has occurred (such as when smoke appears or there is a smell of burning), shut down the
pump’s operation immediately, and contact your vender or a TACMINA representative. Otherwise, a fire,
electric shocks and/or malfunctions may result.
• Do not attempt to disassemble the pump body or the circuit parts.
!
CAUTION
• When working on the liquid-end parts of the pump, wear protective gear suited to the chemical
concerned (such as rubber gloves, a mask, protective goggles and work overalls that are resistant to
chemical).
• Before attempting to maintain or repair the pump, release the pressure in the discharge pipe, discharge
the liquid in the pump head, and clean the liquid-end parts.
Check the following points.
Routine inspections
• Check whether the level of the chemical in the tank is high enough.
• Check the pump for chemical leakage.
• Check that the pressure gauge on the pump discharge side indicates a normal value.
Periodic inspections
• At the 10,000-hour mark after starting the pump operation
• When discharge trouble has occurred (reduced discharge
volume)
• When chemical is leaking from around the pump head
Replacing the diaphragm
(see the page 30)
• At the 10,000-hour mark after starting the pump operation
• When discharge trouble has occurred (reduced discharge
volume)
Replacing the valve seats
and check balls
(see the page 31 to 34)
When trouble has occurred
• When the relief-valve function has been activated
Replacing the relief valve
(see the page 35)
• When trouble has occurred during operation
Troubleshooting
(see the page 37 to 38)