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PAGE 8 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)
SAFETY INFORMATION
PUMP SAFETY
  DANGER
 
„ NEVER operate the equipment in an explosive 
atmosphere or near combustible materials. An 
explosion or fire could result causing severe 
bodily harm or even death.
 
„ NEVER use pump for swimming pool dewatering applications. 
This can result in electrical shock or electrocution.
  WARNING 
 
„ Accidental starting can cause severe injury 
or death. ALWAYS place the ON/OFF 
switch in the OFF position.
 
„ DO NOT place hands or fingers inside 
pump when pump is running.
 
„ NEVER disconnect any emergency or 
safety devices. These devices are intended for operator 
safety. Disconnection of these devices can cause severe 
injury, bodily harm or even death. Disconnection of any 
of these devices will void all warranties.
  CAUTION
 
„ DO NOT restrict the flow of the discharge hose as it may 
cause overheating.
 
„ Be careful of discharge whipping under pressure.
  NOTICE
 
„ ALWAYS  place the pump in an upright position on a 
platform before using. The platform will prevent the pump 
frowm burrowing itself on soft sand or mud.
 
„ NEVER operate pump on its side.
 
„ DO NOT allow up to freeze in water.
 
„ NEVER leave an open pump chamber unattended.
 
„ ALWAYS keep the machine in proper running condition.
 
„ DO NOT attempt to thaw-out a frozen pump by using 
a torch or other source of flame. Application of heat in 
this manner may heat the oil in the seal cavity above the 
critical point, causing pump damage.
 
„ DO NOT pump water greater than 104º F. 
 
„ DO NOT pump liquids containing acid or alkali.
 
„ ALWAYS check strainer before pumping. Make sure
strainer is not clogged. Remove any large objects, dirt 
or debris from the strainer to prevent clogging.
 
„ ALWAYS use a large basket strainer when pumping 
water that contains large debris.
 
„ ALWAYS flush pump (clean) after use when pumping
water concentrated with heavy debris. It is very important 
to always flush the pump before turning it off to prevent 
clogging.
 
„ Fix damage to machine and replace any broken parts 
immediately.
 
„ ALWAYS store equipment properly when it is not being
used. Equipment should be stored in a clean, dry location 
out of the reach of children and unauthorized personnel.
 
„ NEVER lubricate components or attempt service on a
running machine.
 
„ ALWAYS allow the machine a proper amount of time to
cool before servicing.
 
„ Keep machine in proper running condition.
ELECTRICAL SAFETY
  DANGER
 
„ The electrical voltage required to operate 
pump can cause severe injury or even death 
through physical contact with live circuits. 
ALWAYS disconnect electrical power from 
pump before performing maintenance on 
pump.
NOTICE
 
„ ALWAYS make certain that the voltage supplied to the
pump is correct. Always read the pump’s nameplate to 
determine what the power requirements are.