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Maintenance
Model 3410 Installation, Operation, and Maintenance Manual
57
Disassembly
Disassembly precautions
WARNING:
• Risk of serious physical injury or death from rapid depressurization. Ensure pump is
isolated from system and pressure is relieved before disassembling pump, removing
plugs, opening vent or drain valves, or disconnecting piping.
• Risk of serious personal injury. Applying heat to impellers, propellers, or their retaining
devices can cause trapped liquid to rapidly expand and result in a violent explosion. This
manual clearly identifies accepted methods for disassembling units. These methods must
be adhered to. Never apply heat to aid in their removal unless explicitly stated in this
manual.
• Failure to disconnect and lock out driver power may result in serious physical injury or
death. Always disconnect and lock out power to the driver before performing any
installation or maintenance tasks.
• Electrical connections must be made by certified electricians in compliance with all
international, national, state, and local rules.
• Refer to driver/coupling/gear manufacturer's installation and operation manuals (IOM)
for specific instructions and recommendations.
• Handling heavy equipment poses a crush hazard. Use caution during handling and wear
appropriate Personal Protective Equipment (PPE, such as steel-toed shoes, gloves, etc.)
at all times.
• Precautions must be taken to prevent physical injury. The pump may handle hazardous
and/or toxic fluids. Proper personal protective equipment should be worn. Pumpage must
be handled and disposed of in conformance with applicable environmental regulations.
• Risk of serious personal injury from exposure to hazardous or toxic liquids. A small amount
of liquid will be present in certain areas like the seal chamber upon disassembly.
CAUTION:
• Avoid injury. Worn pump components can have sharp edges. Wear appropriate gloves
while handling these parts.
Drain the pump
1. Close the isolation valves on the suction and discharge sides of the pump.
You must drain the system if no valves are installed.
2. Open the drain valve.
Do not proceed until liquid stops coming out of the drain valve. If liquid continues to flow
from the drain valve, the isolation valves are not sealing properly and you must repair them
before you proceed.
3. Leave the drain valve open.
Do not close the drain valve until the reassembly is complete.
4. Drain the liquid from the piping and flush the pump if it is necessary.
5. Disconnect all auxiliary piping and tubing.
6. Remove the coupling guard.
Remove the coupling guard
1. Remove the nut, bolt, and washers from the slotted hole in the center of the coupling guard.
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