Maintenance & Repair; Work Safety; Removal From System - Liquiflo H Series Installation, Operation & Maintenance Manual

Liquiflo Installation, Operation & Maintenance Manual
Section 5: Maintenance & Repair
The pump has internal bearings, wear plates, gears and shafts which require replacement over time due to
physical wear. The center housing of the pump may also incur physical wear and require replacement
(see Appendix 3). O-rings and retaining rings should always be replaced when rebuilding the pump.
5.1

Work Safety

Before performing maintenance, review the safety precautions given in Section 2 (see Page 9).
CAUTION! The Magnetic Couplings used in these pumps are extremely powerful.
Observe the precautions given in Section 2.2.
5.2

Removal from System

Before servicing, prepare the pump as follows:
CAUTION! If the pump was used to move hazardous or toxic fluids, it must be
flushed and decontaminated prior to removal from the system piping. Refer to
the Material Safety Data Sheet (MSDS) for the liquid and follow all prescribed
safety precautions and disposal procedures.
1
Flush the pump.
2
Stop the motor and lock out the electrical panel.
CAUTION! Be certain the pump's motor switch is in the OFF position and the
power to the motor is locked out.
3
Close the suction and discharge isolation valves.
4
Disconnect the pump from the system piping.
5
Drain the containment can by removing the 1/8" NPT plug on the pump's front housing (see
photo below).
Location & Removal of Drain Plug
To drain the containment can, remove the
1/8" NPT plug that is located near the
bottom of the pump's front housing
(see photo).
1/8" NPT Plug
14
MAG-DRIVE Gear Pumps
Models H1-H9, 31-39 & 311 - MC