26
3
w)
Lay the assembly over so that the shaft is in a horizontal
position.
x)
Remove the impeller nut (12), impeller washer (12A)
and the handle, or the optional eye bolt.
y)
Lubricate the unslotted face of a new thrust collar (210)
with a light oil and place it over the exposed end of the
journal sleeve (200), so that the lubricated face mates
against the face of the bearing bushing (182). Place the
impeller key (4) into the keyway of the pump shaft (29),
being sure that it engages the slot in the end of the
journal sleeve (200). Drive the thrust collar dowel
(210A) into the impeller (3). Slide the impeller (3) onto
the pump shaft (29), being careful to have the thrust
collar (210) rotated to such a position that its dowel
hole receives the thrust collar dowel (210A). Place the
impeller washer (12A) over the end of the pump shaft
(29) and against the impeller (3). Place the impeller
spring washer (12B) over the end of the pump shaft
(29) so that its concave (dished) side rests against the
impeller washer (12A). Install and tighten the impeller
nut (12) to 30 ft. lb. (for Frames I and II) or 60 ft. lb.
(for Frame III) while holding the impeller (3) against
rotation with a piece of bar stock placed between the
impeller blades (3). It is important to restrain the
impeller (3) from rotation in this manner to reduce the
possibility of breaking the internal silicon carbide parts.
Apply two drops of Locite “Thread Lock” #222 to the
threads of a new locking set screw (12D) and thread it
into the impeller nut (12). Tighten the locking set screw
(12D) to 15 Ft. Lb., while holding the impeller (3)
against rotation as described above.
z)
Press a new casing wear ring assembly (190) into
the casing (5) with the stepped side of the assembly
facing out.
CAUTION:
Wear safety glasses, gloves, and a long
sleeved shirt during this operation. Care must be
exercised so that the brittle inner member of the
casing wear ring assembly (190) is not broken.
aa)
Install any auxiliary piping which must be affixed to the
pump before it is mounted to the baseplate.
ab)
Place a new casing gasket (77) into the casing (5) and
then carefully slide the rotating assembly into the casing
and tighten the casing bolts, slowly and evenly to 50 Ft. Lb.
ac)
Rotate the drive shaft (29A) by hand to check for any
internal interference. Correct as required.
ad)
Bolt the pump to the baseplate, install the coupling hubs,
realign the pump and driver; refer to “PUMP AND
DRIVER ALIGNMENT.”
ae)
Check the motor rotation, install the coupling spacer
and the coupling guard.
af)
Install any remaining auxiliary piping. Close any drain
valves or open connections in the auxiliary piping.
ag)
Fill, lubricate, and vent the pump per the sections titled,
“PUMP LUBRICATION” and “STARTING THE PUMP.”
ah)
Follow instructions under “PUMP START-UP CHECK LIST.”
CAUTION—THIS EQUIPMENT CONTAINS BRITTLE AND
MAGNETIC MATERIALS.
CAUTION—EXTREME HAZARD
HEART
Magnets in/from this pump can upset the timing of
heart pacemakers and make them malfunction. This caution
cannot be overstated due to the health risk involved.
EYES, HANDS, FINGERS, EXPOSED FLESH
Brittle materials
(such as silicon carbide and carbon used for wearing parts)
can fracture and propel hard, sharp particles causing serious
personal injury. Protective equipment must be utilized when
servicing these parts.
The magnets are also very brittle and if cracked or fractured
can propel hard, sharp particles causing serious personal
injury. Protective equipment must be utilized when servicing
these parts.
The magnets used in this pump are very strong and can cause
parts and tools to slam together injuring hands and fingers.
This could also crack the magnets and propel particles as
cautioned above.
WARNING—EQUIPMENT DAMAGE
Some equipment, instruments, and personal possessions could
be damaged and/or destroyed. For example, computers,
computer tapes, computer discs, credit cards and any other
magnetically actuated devices will be rendered useless if
exposed to the strong magnetic field of this pump or its parts.
Watches, spring driven or electronic, will be ruined if exposed
to the strong magnetic field of this pump or its parts.
WARNING—FREIGHT
When shipping raw or bare magnet assemblies, especially by
air, special precautions may be necessary. Usually the shipment
of an assembled pump is not a problem. Consultation with
Dean Pump and the freight company is recommended.
This pump is designed incorporating a relatively new concept
called a “Magnetic Coupling”, and many mechanics will not
have the experience to realize the potential hazard of the
energy stored in the very powerful magnets.
The magnets are installed in two different parts of the pump;
the outer magnet assembly (167), which is driven by the driver
(electric motor), and the inner magnet assembly (175), which is
driven through its magnetic attraction with the outer magnet
assembly (167). There is little magnetic field outside the confines
of the pump components when they are in a completely
assembled pump.
When the pump is partially or completely disassembled, how-
ever, there is a very strong magnetic field, which, if mishandled,
could cause personal injury and/or mechanical damage.
Pinched fingers and hands are the most common personal
injury when any ferrous part comes close to a magnetic field.
This hazard also exists when holding parts with your hands
during assembly.
The most common mechanical damage is chipped magnets and
ruined wrist watches. Chipped magnets, if used, can cause
extensive mechanical damage when particles come loose during
operation. Wrist watches stop dead when they are exposed to
the magnetic field. Non-magnetic tools should be used when
working on, or in close proximity to, magnetic assemblies.
Cleanliness of the magnetic parts is very important as it is
difficult to remove ferrous particles which are “stuck” to the
magnets. Magnetic parts should be sealed in plastic bags and
stored away from the presence of ferrous articles and particles.
The magnetic coupling in each individual pump is selected for
that particular service and is mated with the motor size (power
and inertia) and coupling size. It is critical that maximum and
minimum values of operating condition are known; particularly
temperature, vapor pressure, specific gravity, and viscosity. Any
change in operating conditions which affects specific gravity,
viscosity, differential head, temperature, specific heat, capacity
or speed, may cause the couplings to dis-engage. Change of
motor or coupling could cause the same problem.
If any of the above changes are desired, contact Dean Pump
with all the changes in conditions and we will recalculate the
unit to see if it is acceptable or, if not, what modifications might
be possible.
PRODUCT INSPECTION AND TEST
The Products of Dean Pump Division are subject to thorough
and rigorous quality control and inspection procedures through-
out the whole of the manufacturing process to assure proper
operation in full conformity with established performance
standards. On completion of inspection, each unit is sprayed
internally with rust inhibitor (if material is subject to atmospheric
corrosion), sealed against the entrance of dirt, and tagged with
a signed certificate of inspection prior to shipment. Each pump
when shipped is ready to perform the service for which it was
designed with minimum maintenance and expense if properly
installed and operated in accordance with the instructions
furnished.
DEAN PRODUCT WARRANTY
We warrant to the purchaser from us of Dean Pump products
and parts of our own manufacture (Dean Products) that the
Dean Products are free “under rated use and service” from
defects in design, material and workmanship for a period of
one (1) year from the date of installation, but not to exceed
eighteen (18) months from the date of shipment by us. This
warranty does not cover (I) any loss or damage resulting from
wear, corrosion, abrasion or deterioration due to normal use in
rated service; (II) replacement of service items such as lip seals,
and mechanical seals; (III) products or parts manufactured by
others but furnished by us which, if defective, shall be repaired
or replaced only to the extent of the original manufacturer‘s
CAUTION
