Maintenance
Precautions
WARNING:
• Always follow safety guidelines when working on the pump. See Introduction and Safety
(page 3).
• Disconnect and lock out electrical power before installing or servicing the pump.
• Make sure that the pump cannot roll or fall over and injure people or damage property.
• Rinse the pump thoroughly with clean water before working on the pump.
• Rinse the components in water after dismantling.
Make sure that you follow these requirements:
• Check the explosion risk before you weld or use electrical hand tools.
• Allow all system and pump components to cool before you handle them.
• Make sure that the product and its components have been thoroughly cleaned.
• Do not open any vent or drain valves or remove any plugs while the system is
pressurized. Make sure that the pump is isolated from the system and that pressure is
relieved before you disassemble the pump, remove plugs, or disconnect piping.
Maintenance guidelines
During maintenance and before reassembly, always remember to perform these tasks:
• Clean all parts thoroughly, particularly O-ring grooves.
• Change all O-rings, gaskets, and seal washers.
• Lubricate all springs, screws, and O-rings with grease.
During reassembly, always make sure that existing index markings are in line.
Torque values
Screw and nuts
Stainless steel, A2 and A4
Property
class
M4 M5 M6 M8 M10 M12 M16 M20 M24 M30
Torque,
Nm (ft-
lbs)
70 +80 2.7 (2) 5.4 (4) 9.3 (6.9) 22 (16) 44 (32) 76 (56) 187 (138) 364 (268) 629 (464) 1240
(915)
Carbon steel and alloyed steel
1
Property class 70 is torque tightened as class 80.
Maintenance
30 2125 Installation, Operation, and Maintenance Manual
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