Maintenance Instructions; General; Preparation; Surroundings (On Site) - Johnson Pump TG GS2-25 Instruction Manual

3.21 Maintenance instructions

3.21.1 General

This chapter only describes operations that can be performed on-site for normal maintenance.
For maintenance and repair requiring a workshop contact your local supplier.
• Insufficient, wrong and/or irregular maintenance can lead to malfunctions in the pump, high
repair costs and long-term inoperability. Therefore, you should carefully follow the guidelines
given in this chapter.
During maintenance operations on the pump due to inspections, preventive maintenance or
removal from the installation, always follow the prescribed procedures.
Non-compliance with these instructions or warnings may be dangerous for the user and/or
seriously damage the pump/pump group.
• Maintenance operations should be performed by qualified personnel only. Always wear the
required safety clothing, providing protection against high temperatures and harmful and/or
corrosive fluids. Make sure that the personnel read the entire instruction manual and, in
particular, indicate those sections concerning the work at hand.
• SPX is not responsible for accidents and damage caused by non-compliance with the
guidelines.

3.21.2 Preparation

3.21.2.1 Surroundings (on site)

Because certain parts have very small tolerances and/or are vulnerable, a clean work environment
must be created during on-site maintenance.

3.21.2.2 Tools

For maintenance and repairs use only technically appropriate tools that are in good condition.
Handle them correctly.

3.21.2.3 Shut-down

Before commencing the maintenance and inspection activities the pump must be taken out of
service. The pump/pump unit must be fully depressurized. If the pumped fluid permits, let the pump
cool down to the surrounding temperature.

3.21.2.4 Motor safety

Take appropriate steps to prevent the motor from starting while you are still working on the pump.
This is particularly important for electric motors that are started from a distance.
Follow the below described procedure:
• Set the circuit breaker at the pump to "off".
• Turn the pump off at the control box.
• Secure the control box or place a warning sign on the control box.
• Remove the fuses and take them with you to the place of work.
• Do not remove the protective guard around the coupling until the pump has come to a
complete standstill.

3.21.2.5 Conservation

If the pump is not to be used for longer periods:
• First drain the pump.
• Then treat the internal parts with VG46 mineral oil or other preservering liquid.
• The pump must be operated briefly once a week or alternatively the shaft must be turned a
full turn once a week. This ensures proper circulation of the protective oil.
A.0500.501 – IM-TGGS/05.01 EN (03/2013) 43