Page 1
Self Priming Trash Pump
Model EFQT-3
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Page 2
TABLE OF CONTENTS
INTRODUCTION................................................................................. 4
WARNING – SECTION ...................................................................... 5
INSTALLATION – SECTION B.......................................................... 6
Pump Dimensions............................................................ 7
PRE-INSTALLATION INSPECTION...................................... 7
POSITIONING PUMP............................................................. 7
Lifting................................................................................ 7
Mounting........................................................................... 7
Clearance......................................................................... 7
SUCTION AND DISCHARGE PIPING................................... 7
Materials........................................................................... 7
Line Configuration............................................................ 8
Connections to Pump....................................................... 8
Gauges............................................................................. 8
SUCTION LINES.................................................................... 8
Fittings.............................................................................. 8
Strainers........................................................................... 8
Sealing.............................................................................. 8
Suction Lines in Sumps.................................................... 8
Suction Lines Positioning................................................. 9
DISCHARGE LINES............................................................... 9
Siphoning.......................................................................... 9
Valves............................................................................... 9
Bypass Lines.................................................................... 10
AUTOMATIC AIR RELEASE VALVE..................................... 11
Theory of Operation.......................................................... 11
Air Release Valve Installation........................................... 11
ALIGNMENT........................................................................... 12
Coupled Drivers................................................................ 13
V-Belt Drives..................................................................... 13
OPERATION – SECTION C...............................................................
15
PRIMING................................................................................ 15
STARTING............................................................................. 15
Rotation............................................................................ 15
OPERATION.......................................................................... 16
Lines With a Bypass......................................................... 16
Lines Without a Bypass.................................................... 16
Leakage............................................................................ 16
Liquids Temperature and Overheating............................. 16
Strainer Check.................................................................. 17
Pump Vacuum Check....................................................... 17
STOPPING............................................................................. 17
Cold Weather Preservation............................................... 17
BEARING TEMPERATURE CHECK...................................... 17
EBARA Fluid Handling 2
Page 3
TABLE OF CONTENTS (continued)
TROUBLESHOOTING – SECTION D................................................ 18
PUMP MAINTENANCE AND REPAIR – SECTION E........................ 22
PERFORMANCE CURVE……………………………………… 22
Pump Model............................................................................ 23
PARTS LISTS .................................................................. 24
Repair Rotating Assembly…………………………………....... 25
PARTS LISTS .................................................................. 26
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY…... 27
Back Cover and Wear Plate Removal……………………. 27
Suction Check Valve Removal…………………………….. 27
Rotating Assembly Removal……………………………….. 27
Impeller Removal……………………………………………. 28
Seal Removal……………………………………………… 29
Shaft and Bearing Removal and Disassembly…………… 31
Shaft and Bearing Reassembly and Installation…………. 31
Seal and Installation…………………………..................... 33
Impeller Installation…………………………………………. 33
Rotating Assembly Installation……….…………………… 34
Suction Check Valve Installation………………………….. 34
Back Cover Installation……………………………………... 34
PRESSURE RELIEF VALVE MAINTENANCE..................................
34
Final Pump Assembly………………………………………. 35
LUBRICATION…………………………………………………………….
35
Seal Assembly.................................................................. 35
Bearings………………….................................................. 35
Power Source................................................................... 35
EBARA Fluid Handling 3
Page 4
INTRODUCTION
This Installation, Operation, and Maintenance manual is designed to help you get the best
performance and longest life from your EBARA pump.
This pump is a EFQT Series, semi-open impeller, self-priming centrifugal model with a suction check
valve.
The pump is designed for handling mild industrial corrosives, mud or slurries containing large
entrained solids. The basic material of construction is gray iron, with ductile iron impeller and steel
wearing parts.
If there are any questions regarding the pump or its applications which are not covered in this manual or in
other literature accompanying this unit, please contact your EBARA distributor, or write:
EBARA Fluid Handling
1651 Cedar Line Drive
Rock Hill, SC 29730
For information or technical assistance on the power source, contact the power source
manufacture’s local dealer or representative.
The following are used to alert maintenance personnel to procedures which require special attention,
to those which could damage equipment, and to those which could be dangerous to personnel:
Immediate hazards which WILL result in
severe personal injury or death. These
instructions describe the procedure
required and the injury which will result
from failure to follow procedure.
CAUTION! DANGER!
Hazards or unsafe practices which
COULD result in minor personal injury or
product or property damage. These
instructions describe the requirements
and the possible damage which could
result from failure to follow the
procedure.
NOTE
Instructions to aid in installation,
operation, and maintenance or which
clarify a procedure.
EBARA Fluid Handling 4
Page 5
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SAFETY – SECTION A
These warnings apply to EFQT series basic pumps. EBARA has no control over or particular
knowledge of the power source which will be used. Refer to the manual accompanying the power
source before attempting to begin operation.
WARNING! WARNING!
Before attempting to open or service the
pump:
1. Familiarize yourself with this manual.
2. Disconnect or lock out the powe
source to ensure that the pump will
remain inoperative.
3. Allow the pump to cool if overheated.
4. Check the temperature before
opening any covers, plates, or plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cautiously.
7. Drain the pump.
WARNING!
This pump is designed to handle mild
industrial corrosives, mud or slurries
containing large entrained solids. Do not
attempt to pump volatile, corrosive, o
flammable materials which may damage
the pump or endanger personnel as
result of pump failure.
After the pump has been positioned,
make certain that the pump and all piping
connections are tight, properly supported
and secure before operation.
Do not operate the pump without the
guards in place over the rotating parts.
Exposed rotating parts can catch
clothing, fingers, or tools, causing severe
injury to personnel.
Do not remove plates, covers, gauges,
pipe plugs, or fittings from an overheated
pump. Vapor pressure within the pump
can cause parts being disengaged to be
ejected with great force. Allow the pump
to cool before servicing.
Do not operate the pump against a
closed discharge valve for long periods
of time. If operated against a closed
discharge valve, pump components will
deteriorate, and the liquid could come to
a boil, pressure, and cause the pump
casing to rupture or explode.
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or
damage to equipment. Suction and
discharge hoses and piping must be
removed form the before lifting.
WARNING!
WARNING!
WARNING!
WARNING!
EBARA Fluid Handling 5
Page 6
INSTALLATION – SECTION B
Review all SAFETY information in Section A.
Since pump installations are seldom identical, this section offers only general recommendations and
practices required to inspect, position and arrange the pump and piping.
Most of the information pertains to a standard static lift application where the pump is positioned
above the level of liquid to be pumped.
If installed in a flooded suction application where the liquid is supplied to the pump under
pressure, some of the information such as mounting, line configuration, and priming must be tailored
to the specific application.
Since the pressure supplied to the pump is critical to performance and safety, be sure to limit
incoming pressure to 50% of the maximum permissible operating pressure as shown on the pump
performance curve.
For further assistance, contact your EBARA distributor or EBARA.
Pump Dimensions
See Figure 1 for the approximate physical dimensions of this pump.
EFQT-3 OUTLINE DRAWING
(216,0)
8,50
17,00
(432,0)
15,51
(394,0)
7,75
(197,0)
DIMENSIONS:
INCHES
(MILIMETERS)
7,32
(186,0)
8,81
(224,0)
25,82
(656,0)
17,00
(432,0)
2,99
(76,0)
Figure 1 – Pump Model EFQT-3
5,98
152,5
24,50
(622,5)
11,18
284,0
4,01
(102,0)
7,50
(190,5)
0,38[9,6] x 0,19[4,8]
x 3,50[88,9]
1,50 DIA
(38,1)
EBARA Fluid Handling 6
Page 7
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PRE-INSTALLATION INSPECTION
The pump assembly was inspected and
tested before shipment from the factory.
Before installation, inspect the pump fo
damage which may have occurred during
shipment. Check as follows:
a. Inspect the pump for cracks, dents,
damaged threads, and other obvious
damage.
b. Check for and tighten loose fasteners.
Since gaskets tend to shrink afte
drying, check for loose hardware at
mating surfaces.
c. Carefully read all warnings and
cautions contained in this manual o
affixed to the pump, and perform all
duties indicated. Note the direction o
rotation indicated on the pump. Check
that the pump shaft rotates counterclockwise when facing the back cove
plate assembly/impeller end of the
pump.
CAUTION!
Only operate this pump in the direction
indicate by the arrow on the pump body
and on the accompanying decal. Refer to
ROTATION
d. Check levels and lubricate as
necessary. Refer to LUBRICATION
in the MAINTENANCE AND REPAIR
section of this manual and perform
duties as instructed.
e. If the pump and power source have
been stored for more than 12 months,
some of the components o
lubricants may have exceeded thei
maximum shelf life. These must be
inspected or replaced to ensure
maximum pump service.
If the maximum shelf life has been
exceeded, or if anything appears to be
abnormal, contact your EBARA Pump
distributor or the factory to determine the
repair or updating policy. Do not
pump into service until appropriate
action has been taken.
in OPERATION, Section C.
put the
POSITIONING PUMP
CAUTION!
The pump assembly can be seriously
damaged if the cables or chains used to
lift and move the unit is improperly
wrapped around the pump.
Mounting
Locate the pump in an accessible place as
close as practical to the liquid being
pumped. Level mounting is essential fo
proper operation.
The pump may have to be supported o
shimmed to provide for level operation or to
eliminate vibration.
Clearance
When positioning the pump, allow a
minimum clearance of 18 inches (457 mm)
in front of the back cover to permit removal
of the cover and easy access to the pump
interior.
SUCTION AND DISCHARGE PIPING
Pump performance is adversely affected by
increase suction lift, discharge elevation
and friction losses. See the performance
curve and operating range shown on Page
21 to be sure your overall application allows
pump to operate within the safe operation
range.
Materials
Either pipe or hose maybe used for suction
and discharge lines: however, the materials
must be compatible with liquid being
pumped.
EBARA Fluid Handling 7
Page 8
If hose is used in suction lines, it must be the
rigid-wall, reinforced type to prevent collapse
under suction. Using piping couplings in
suction lines is not recommended.
Line Configuration
Keep suction and discharge lines as straight
as possible to minimize friction losses. Make
minimum use of elbows and fittings, which
substantially increase friction loss. If elbows
are necessary, use the long radius type to
minimize friction loss.
Connections to Pump
Before tightening a connecting flange, align
it exactly with the pump port. Never pull a
pipe line into place by tightening the flange
bolts and/or couplings.
Lines near the pump must be independently
supported to avoid strain on the pump which
could cause excessive vibration, decrease
bearing life, and increased shaft and seal
wear. If hose-type lines are used, they
should have adequate support to secure
them when filled with liquid and under
pressure.
Gauges
Most pumps are drilled and tapped for
installing discharge pressure and vacuum
suction gauges. If these gauges are desired
for pumps that are not tapped, drill and tap
the suction and discharge lines not less than
18 inches (457,2mm) from the suction and
discharge ports and install the lines.
Installation closer to the pump may result in
erratic readings.
SUCTION LINES
To avoid air pockets which could affect
pump priming, the suction line must be as
short and direct as possible. When operation
involves a suction lift, the line must always
slope upward to the pump from the source of
the liquid being pumped: if the line slopes
down to the pump at any point along the
suction run, air pockets will be created.
Fittings
Suction lines should be the same size as the
pump inlet. If reducers are used in suction
lines, they should be the eccentric type, and
should be installed with the flat part of the
reducers uppermost to avoid creating air
pockets. Valves are not normally used in
suction lines, but if a valve is used, install it
with the horizontal to avoid air pockets.
Strainers
If a strainer is furnished with the pump, be
certain to use it; any spherical solids which
pass through a strainer furnished with the
pump will also pass through the pump itself.
If a strainer is not furnished with the pump,
but is installed by the pump user, make
certain that the total area of the openings in
the strainer is at least three or four times the
cross section of the suction line, and that the
openings will not permit passage of solids
larger than the solids handling capability of
the pump.
This pump is designed to handle up to 2 ½
inch (63.5 mm) diameter spherical solids.
Sealing
Since even a slight leak will affect priming,
head, and capacity, especially when
operating with a high suction lift; all
connections in the suction line should be
sealed with pipe dope to ensure an airtight
seal. Follow the sealant manufacturer’s
recommendations when selecting and
applying the pipe dope. The pipe dope
should be compatible with the liquid being
pumped.
Suction Lines in Sumps
If a single suction line is installed in a sump,
it should be positioned away from the wall of
the sump at a distance equal to 1 ½ times
the diameter of the suction line.
If there is a liquid flow from an open pipe into
the sump, the flow should be kept away from
the suction inlet because the inflow will carry
air down into the sump, and air entering the
suction line will reduce pump efficiency.
EBARA Fluid Handling 8
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If it is necessary to position inflow close to
the suction inlet, install a baffle between the
inflow and the in suction lines, it must be the
rigid-wall, reinforced type to prevent collapse
under suction. Using piping couplings in
suction lines is not recommended. Suction
inlet at a distance 1 ½ times the diameter o
the suction pipe. The baffle will allo
entrained air to escape from the liquid before
it is drawn into the suction inlet.
If two suction lines are installed a single
sump, the flow paths may interact, reducing
the efficiency of one or both pumps. To
avoid this, position the suction inlets so tha
they are separated by a distance equal to a
least 3 times the diameter of the suction
pipe.
Suction Line Positioning
The depth of submergence of the suction
line is critical to efficient pump operation.
Figure 2 shows Recommended minimum
submergence vs. velocity.
NOTE
The pipe submergence required may be
reduced by installing a standard pipe
increaser fitting at the end of the suction
line. The larger opening size will reduce
the inlet velocity. Calculate the required
submergence using the following formula
based on the increased opening size
(area or diameter).
VELOCITY (FT./SEC.) = QUANT. (G.P.M)x.321 OR G.P.M. x 4085
AREA D²
VELOCITY (M./SEC.) = FLOW (M./MIN)x21.22 OR FLOW (M³/SEC.)
DIAMETER IN MM² AREA IN M²
Figure 2. Recommended Minimum Suction Line Submergence vs. Velocity
DISCHARGE LINES
Siphoning
Do not terminate the discharge line at a level
lower than of the liquid being pumped unless
a siphon breaker is used in the line.
Otherwise, a siphoning action causing
damage to the pump could result.
Valves
If a throttling valve is desired in the discharge
line, use a valve as large as the largest pipe to
minimize friction losses. Never install a throttling
valve in a suction line.
With high discharge heads, it is recommended
that a throttling valve and a system check valve
be installed in the discharge line to protect the
pump from excessive shock pressure and
reverse rotation when it is stopped.
EBARA Fluid Handling 9
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CAUTION!
If the application involves a high discharge
head, gradually close the discharge throttling
valve before stopping the pump.
Bypass Lines
Self-priming pumps are not air compressors.
During the priming cycle, air from the suction
line must be vented to atmosphere on the
discharge side. If the discharge line is open,
and a check valve has been installed in the
discharge line, the discharge side of the
pump must be opened to atmospheric
pressure through a bypass line installed
between the pump discharge and the check
valve. A self-priming centrifugal pump will
not prime if there is sufficient static liquid
head to hold the discharge check valve
closed.
NOTE
The bypass line should be sized so that i
does not affect pump discharge capacity;
however, the bypass line should be a
least 1 inch in diameter to minimize the
chance of plugging.
In low discharge head applications (less
than 30 feet or 9 meters), it is recommended
that the bypass line be run back to the wet
well, and locate 6 inches below the wate
level or cut-off point of the level pump. In
some installations, this bypass line may be
terminated with a six-to-eight foot length o
1¼ inch ID. Smooth-bore hose; air and
liquid vented during the priming process will
then agitate the hose and break up any
solids, grease, or other substances likely to
cause clogging.
CAUTION!
A bypass line that is returned to a wet
well must be secured against being
drawn into the pump suction inlet.
It is also recommended that pipe unions be
installed at each 90º elbow in a bypass line
to ease disassembly and maintenance.
In high discharge head applications (more
than 30 feet), an excessive amount of liquid
may be bypassed and forced back to the wet
well under the full working pressure of the
pump; this will reduce overall pumping
efficiency. Therefore, it is recommended
that a EBARA
Valve be installed in the bypass line.
EBARA
reliable, and require minimum maintenance.
See AUTOMATIC AIR RELEASE VALVE in
this section for installation and theory o
operation of the Automatic Air Release
Valve. Contact EBARA for selection of an
utomatic Air Release Valve to fit your
application.
If the installation involves a flooded suction
such as below ground lift station. A pipe
union and manual shut-off valve may be
installed in the bleed line to allow service o
the valve without shutting down the station,
and to eliminate the possibility of flooding. I
a manual shut-off valve is installed
anywhere in the air release piping, it must be
a full-opening ball type valve to prevent
plugging by solids.
utomatic Air Release Valves are
utomatic Air Release
DANGER!
If a manual shut-off valve is installed in a
bypass line, it must not be left closed
during operation. A closed manual shutoff valve may cause a pump which has
lost prime to continue to operate without
reaching prime, causing dangerous
overheating and possible explosive
rupture of the pump casing. Personnel
could be severely injured.
Allow an over-heated pump to cool before
servicing. Do not remove plates, covers,
gauges, or fittings from an overheated
pump. Liquid within the pump can reach
boiling temperatures, and vapor pressure
within the pump can cause parts being
disengaged to be ejected with great force.
fter the pump cools, drain the liquid from
the pump by removing the casing drain plug.
Use caution when removing the plug to
prevent injury to personnel from hot liquid.
EBARA Fluid Handling 10
Page 11
AUTOMATIC AIR RELEASE VALVE
When properly installed and correctly
adjusted to the specific hydraulic operating
conditions of the application, the EBARA
Automatic Air Release Valve will permit air
to escape through the bypass line, and then
close automatically when the pump is fully
primed and pumping at full capacity.
Theory of Operation
Figures 3 and 4 show a cross-sectional view
of the Automatic Air Release Valve, and a
corresponding description of operation.
Figure 3 – Valve in Open Position
During the priming cycle, air from the pump
casing flows through the bypass line, and
passes through the Air Release valve to the
wet well (Figure 3).
Figure 4 – Valve in Closed Position
When the pump is fully primed, pressure
resulting from flow against the valve
diaphragm compresses the spring and
closes the valve (Figure 4). The valve will
remain closed, reducing the bypass of liquid
to 1 to 5 gallons (3.8 to 19 liters) per minute,
until the pump loses it’s prime or stops.
Some leakage (1 to 5 gallons [3.8 to 19
liters] per minute) will occur when the
valve is fully closed. Be sure the bypass
line is directed back to the wet well or
tank to prevent hazardous spills.
When the pump shuts down, the spring
returns the diaphragm to its original position.
Any solids that may have accumulated in the
diaphragm chamber settle to the bottom and
are flushed out during the next priming cycle.
WARNING!
NOTE
The valve will remain open if the pump
does not reach its designed capacity or
head. Valve closing pressure is
dependent upon the discharge head of
the pump at full capacity. The range of
the valve closing pressure is established
by the tension rate of the spring as
ordered from the factory. Valve closing
pressure can be further adjusted to the
exact system requirements by moving
the spring retaining pin up or down the
plunger rod to increase or decrease
tension on the spring. Contact your
EBARA distributor or EBARA for
information about an Automatic Air
Release Valve for your specific
application.
Air Release Valve installation
The Automatic Air Release Valve must be
independently mounted in a horizontal
position and connected to the discharge line
of the self-priming centrifugal pump (see
Figure 5).
NOTE
If the Air Release Valve is to be installed
on a staged pump application, contact
the factory for specific installation
instructions.
EBARA Fluid Handling 11
Page 12
°
INSTALL AIR RELEASE VALVE
IN HORIZONTAL POSITION
90 LONG
RADIUS
ELBOW
BLEED LINE 1"
(25,4MM) DIA. MIN.
(CUSTOMER
FURNISHED)
EXTEND 6"
(152,4MM)
BELOW LIQUID
LEVEL SURFACE
Figure 5 – Typical Automatic Air Release Valve Installation
SUPPORT
BRACKET
CLEAN-OUT
COVER
SUCTION
LINE
DISCHARGE PIPE
DISCHARGE PIPE
SELF-PRINING
CENTRIFUGAL
PUMP
DRAIN LINE
WET WELL OR SUMP
The valve inlet must be installed between
the pump discharge port and the nonpressurized side of the discharge check
valve. The valve inlet is it at the large end of
the valve body, and is provided with
standard 1-inch NPT pipe threads.
The valve outlet is located at the opposite
end of the valve, and is also equipped with
standard 1-inch NPT pipe threads. The
outlet should be connected to a bleed line
which slopes back to the wet well or sump.
The bleed line must be the same size as the
inlet piping, or larger. If piping is used for the
bleed line, avoid the use of elbows
whenever possible.
NOTE
It is recommended that each Air Release
Valve be fitted with an independent
bleeder line directed back to the wet well.
However, if multiple airs Release Valves
are installed in a system, the bleeder
ALIGNMENT
The alignment of the pump and its power
source is critical for trouble-free mechanical
operation. In either a flexible coupling or
V-belt driven system, the driver and pump
must be mounted so that their shafts are
aligned with and parallel to each other. It is
imperative that alignment be checked after
the pump and piping are installed, and
before operation.
NOTE
Check Rotation, Section C, before
alignment of the pump.
When mounted at the EBARA factory, driver
and pump are aligned before shipment.
Misalignment will occur in transit and
handling. Pumps must be checking
alignment, tighten the foundation bolts. The
pump casing feet and/or pedestal feet, and
the driver mounting bolts should also be
tightly secured.
lines may be directed to a common
manifold pipe. Contact your EBARA
distributor or the EBARA for information
about installation of an Automatic Air
Release Valve for your specific
application.
EBARA Fluid Handling 12
Page 13
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When checking alignment, disconnect the
power source to ensure that the pump will
remain inoperative.
djusting the alignment in one direction may
alter the alignment in another direction.
Check each procedure after altering
alignment.
WARNING!
CAUTION!
Coupled Drives
When using couplings, the axis of the power
source must be aligned the axis of the pump
shaft in both the horizontal and vertical
planes. Most couplings require a specific
gap or clearance between the driving and
the driven shafts. Refer to the coupling
manufacturer’s service literature.
lign spider insert type couplings by using
calipers to measure the dimensions on the
circumference of the outer ends of the
coupling hub every 90 degrees. The
coupling is in alignment when the hub ends
are the same distance apart at all points
(see Figure 6A).
Figure 6A – Aligning Spider – Type Couplings
Figure 6B – Aligning Non-Spider Type Couplings
Align non-spider type couplings by using a
feeler gauge or taper gauge between the
couplings halves every 90 degrees. The
coupling is in alignment when the hubs are
the same distance apart at all points (see
Figure 6B).
Check parallel adjustment by laying a
straightedge across both coupling rims at the
top, bottom, and side. When the
straightedge rests evenly on both halves o
the coupling, the coupling is in horizontal
parallel alignment. If the coupling is
misaligned use a feeler gauge between the
coupling and the straightedge to measure
the amount of misalignment.
EBARA Fluid Handling
V-Belt Drives
When using V-belt drives, the power source
and the pump must be parallel. Use a
straightedge along the sides of the pulleys to
ensure that the pulleys are properly aligned
(see Figure 6C). In drive systems using two
or more belts, make certain that the belts are
a matched set; unmatched sets will cause
accelerated belt wear.
13
Page 14
MISALIGNED:
SHAFTS NOT PARALLEL
MISALIGNED:
SHAFTS NOT IN LINE
Figure 6C. – Alignment of V-Belt Driven Pumps
Tighten the belts in accordance with the belt
manufacturer’s instructions. If the belts are
too loose, they will slip; if the belts are too
tight, there will be excessive power loss and
possible bearing failure. Select pulleys that
will match the proper speed ratio; over
speeding the pump may damage both pump
and power source.
ALIGNED:
SHAFTS PARALLEL AND
SHEAVES IN LINE
DANGER!
Do not operate the pump without the guard
in place over the rotating parts. Exposed
rotating parts can catch clothing, fingers, or
tools, causing severe injury to personnel.
EBARA Fluid Handling 14
Page 15
OPERATION – SECTION C
Review all SAFETY information in Section A.
Follow instructions on all tags, labels and
decals attached to the pump.
This pump is designed to handle mild
industrial corrosives, mud or slurries
containing large entrained solids. Do not
attempt to pump volatile; corrosive, or
flammable liquids which may damage the
pump or endanger personnel as a result
of pump failure.
Pump speed and operating conditions
must be within the performance range
shown on page 21.
WARNING!
CAUTION!
PRIMING
Install the pump and piping as describe in
INSTALLATION. Make sure that the piping
connections are tight, and that the pump is
securely mounted. Check that the pump is
properly lubricated (see LUBRICATION in
MAINTENANCE AND REPAIR).
This pump is self-priming, but the pump
should never be operated unless there is
liquid in the pump casing.
Never operate this pump unless there is
liquid in the pump casing. The pump will
not prime when dry. Extend operation of
a dry pump will destroy the seal
assembly.
Add liquid to the pump casing when:
1. The pump is being put into service for
the first time.
2. The pump has not been used for a
considerable length of time.
3. The liquid in the pump casing has
evaporated.
Once the pump casing has been filled, the
pump will prime and reprime as necessary.
CAUTION!
WARNING!
After filling the pump casing, reinstall
and tighten the fill plug. Do not attempt to
operate the pump unless all connecting
piping is securely installed. Otherwise,
liquid in the pump forced out under
pressure could cause injury to personnel.
To fill the pump, remove the pump casing fill
cover or fill plug in the top of the casing, and
add clean liquid until the casing is filled.
Replace the fill cover or fill plug before
operating the pump.
STARTING
Consult the operations manual furnished
with the power source.
Rotation
The correct direction of pump rotation is
counterclockwise when facing the impeller.
The pump could be damaged and
performance adversely affected by incorrect
rotation. If pump performance is not within
the specified limits (see the curve on page
21), check the direction of power source
rotation before further troubleshooting.
If an electric motor is used to drive the
pump, remove V-belts, couplings, or
otherwise disconnect the pump from the
motor before checking motor rotation.
Operate the motor independently while
observing the direction of the motor shaft, or
cooling fan.
EBARA Fluid Handling 15
Page 16
If rotation is incorrect on a three-phase
motor, have a qualified electrician
interchange any of the Phase wires to
change direction. If rotation is incorrect on a
single-phase motor, consult the literature
supplied with the motor for specific
instructions.
OPERATION
Lines with a Bypass
If an EBARA Automatic Air Release Valve
has been installed, the valve will
automatically open to allow the pump to
prime, and automatically close after priming
is complete (see INSTALLATION for Air
Release Valve operation.
Lines without a Bypass
Open all valves in the discharge line and
start the power source. Priming is indicated
by a positive reading on the o the discharge
pressure gauge or by a quieter operation.
The pump may not prime immediately
because the suction line must first fill with
liquid. If the pump fails to prime within five
minutes, stop it and check the suction line
for leaks.
After the pump has been primed, partially
close the discharge line throttling valve in
order to fill the line slowly and guard against
excessive shock pressure which could
damage pipe ends, gaskets, sprinkler heads,
and any other fixtures connected to the line.
When the discharge line is completely filled,
adjust the throttling valve to the required flow
rate.
Do not operate the pump against a closed
discharge throttling valve for long periods of
time. If operated against a closed discharge
throttling valve, pump components will
deteriorate, and the liquid could come to a
boil, build pressure, and cause the pump
casing to rupture or explode.
WARNING!
Leakage
No leakage should be visible at pump mating
surfaces, or at pump connections or fittings.
Keep all line connections and fittings tight to
maintain maximum pump efficiency.
Liquid Temperature and Overheating
The maximum liquid temperature for this
pump is 160º F (71º C). Do not apply it at a
higher operating temperature.
Overheating can occur if operated with the
valves in the suction or discharge lines
closed. Operating against closed valves
could bring the liquid to a boil, build
pressure, and cause the pump to rupture or
explode. If overheating occurs, stop the
pump and allow it to cool before servicing it.
Refill the pump casing with cool liquid.
Allow an over-heated pump to cool
before servicing. Do not remove plates,
covers, gauges, or fittings from an
overheated pump. Liquid within the pump
can reach boiling temperatures, and
vapor pressure within the pump can
cause parts being disengaged to be
ejected, with great force. After the pump
cools, drain the liquid from the pump by
removing the casing drain plug. Use
caution when removing the plug to
prevent injury to personnel from hot
liquid.
As safeguard against rupture or explosion
due to heat, this pump is equipped with a
pressure relief valve which will open if vapor
pressure within the pump casing reaches a
critical point. If overheating does occur, stop
the pump immediately and allow it to cool
before servicing it. Approach any overheated
pump cautiously. It is recommended that the
pressure relief valve assembly be replaced
at each overhaul, or any time the pump
casing overheats and activates the valve.
Never replace this valve with a substitute
which has not been specified or provided by
the EBARA.
DANGER!
EBARA Fluid Handling 16
Page 17
Strainer Check
If s suction strainer has been shipped with
the pump or installed by the user, check the
strainer regularly, and clean it as necessary.
The strainer should also be checked if pump
flow rate begins to drop. If a vacuum suction
gauge has been installed, monitor and
record the readings regularly to detect
strainer blockage.
Never introduce air or steam pressure into
the pump casing or piping to remove a
blockage. This could result in personal injury
or damage to the equipment. If back flushing
is absolutely necessary, liquid pressure
must be limited to 50% of the maximum
permissible operating pressure show on the
pump performance curve.
Pump Vacuum Check
With the pump inoperative, install a vacuum
gauge in the system, using pipe dope on the
threads. Block the suction line and start the
pump. At operating speed the pump should
pull a vacuum of 20 inches (508,0mm) or
more of mercury. If it does not, check for air
leaks in the seal, gasket, or discharge valve.
Open the suction line, and read the vacuum
gauge with the pump primed and at
operation speed. Shut off the pump. The
vacuum gauge reading will immediately drop
proportionate to static suction lift, and should
then stabilize. If the vacuum reading falls off
rapidly after stabilization, an air leak exists.
Before checking for the source of the leak,
check the point of installation of the vacuum
gauge.
STOPPING
Never halt the flow of liquid suddenly. If the
liquid being pumped is stopped abruptly,
damaging shock waves can be transmitted
to the pump and piping system. Close all
connecting valves slowly.
On engine driven pumps, reduce the throttle
speed slowly and allow the engine to idle
briefly before stopping.
If the application involves a high discharge
head, gradually close the discharge throttling
valve before stopping the pump.
After stopping the pump, lock out or
disconnect the power source to ensure that
the pump will remain inoperative.
Do not operate the pump against a closed
discharge throttling valve for long
periods of time. If operated against a
closed discharge throttling valve, pump
components will deteriorate, and the
liquid could come to a boil, build
pressure, and cause the pump casing to
rupture or explode.
CAUTION!
WARNING!
Cold Weather Preservation
In below freezing conditions, drain the pump
to prevent damage from freezing. Also, clean
out any solids by flushing with a hose.
Operate the pump for approximately one
minute; this will remove any remaining liquid
that could freeze the pump rotating parts. If
the pump will be idle for more than a few
hours, or if it has been pumping liquids
containing a large amount of solids, drain the
pump, and flush it thoroughly with clean
water. To prevent large solids from clogging
the drain port and preventing the pump from
completely draining, insert a rod or stiff wire
in the drain port, and agitate the liquid during
the draining process. Clean out any
remaining solids by flushing with a hose.
BEARING TEMPERATURE CHECK
Bearings normally run at higher than
ambient temperatures because of heat
generated by friction. Temperatures up to
160º F (71º C) are considered normal for
bearings, and they can operate safely to at
least 180º F (82º C).
EBARA Fluid Handling 17
Page 18
Checking bearing temperatures by hand is
inaccurate. Bearing temperatures can be
measured accurately by placing a contacttype Thermometer against the housing.
Record this temperature for future reference.
A sudden increase in bearing temperature is
a warning that the bearings are at the point
of failing to operate properly. Make certain
that the bearing lubricant is of the proper
viscosity and at the correct level (see
LUBRICATION in MAINTENANCE AND
REPAIR).
Bearing overheating can also be caused by
shaft misalignment and/or excessive
vibration.
When pumps are first started, the bearings
may seem to run at temperatures above
normal. Continued operation should bring
the temperatures down to normal levels.
EBARA Fluid Handling 18
Page 19
TROUBLESHOOTING – SECTION D
Review all SAFETY information in Section A.
WARNING!
Before attempting to open or service the
pump:
1. Familiarize yourself with this manual.
2. Lock out or disconnect the power
source to ensure that the pump will
remain inoperative.
3. Allow the pump to cool if overheated.
4. Check the temperature before
opening any covers, plates, or plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cautiously.
7. Drain the pump.
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PUMP FAILS
TO PRIME
Not enough liquid in casing.
Suction check valve contaminated or
Damaged.
Air leak in suction line.
Lining of suction hose collapsed.
Leaking or worn seal or pump gasket.
Suction lift or discharge head too high.
Strainer clogged.
Add liquid to casing. See PRIMING.
Clean or replace check valve.
Correct leak.
Replace suction Hose.
Check pump vacuum. Replace leaking
Or worn seal or gasket.
Check piping installation and install
bypass line if needed. See INSTALLATION.
Check strainer and clean if necessary.
EBARA Fluid Handling 19
Page 20
r
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PUMP STOPS
OR FAILS TO
DELIVER RATED
FLOW OR
PRESSURE
Air leak in suction line.
Lining of suction hose collapsed.
Leaking or worn seal or pump gasket.
Strainer clogged.
Suction intake not submerged at
Proper level or sump too small.
Impeller or other wearing parts worn o
damaged.
Impeller clogged.
Pump speed too slow.
Discharge head too high.
Suction lift too high.
Correct leak.
Replace suction hose.
Check pump vacuum. Replace leaking or
Worn seal or gasket.
Check strainer and clean if necessary.
Check installation and correct submergence
As needed.
Replace worn or damaged parts. Check
that impeller is properly centered and
Rotates.
Free impeller of debris.
Check driver output; check belts or
Couplings for slippage.
Install bypass line.
Measure lift w/vacuum gauge. Reduce lift
and/or friction losses in suction line.
PUMP REQUIRES
TOO MUCH
POWER
PUMP CLOGS
FREQUENTLY
Pump speed too high
Discharge head too low.
Liquid solution too thick.
Bearing(s) frozen.
Liquid solution too thick.
Discharge flow too slow.
Suction check valve or foot valve
Clogged or binding.
Check driver output; check that sheaves or
motor rpm are correctly sized.
Adjust discharge valve.
Dilute if possible.
Disassemble pump and check bearing(s).
Dilute if possible.
Open discharge valve fully to increase flow
rate, and run power source at maximum
governed speed.
Clean valve.
EBARA Fluid Handling 20
Page 21
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
EXCESSIVE
NOISE
Cavitation in pump.
Pumping entrained air.
Pump or drive not securely mounted.
Impeller clogged or damaged.
Reduce suction lift and/or friction losses in
suction line. Record vacuum and pressure
gauge readings and consult local
representative or factory.
Locate and eliminate source of air bubble.
Secure mounting hardware.
Clean out debris; replace damaged parts.
BEARINGS
RUN TOO HOT
Bearing temperature is high, but
within limits.
Low or incorrect lubricant.
Suction and discharge lines not proper
Supported.
Drive misaligned.
Check bearing temperature regularly to
Monitor any increase.
Check for proper type and level of lubricant.
Check piping installation for proper support.
Align drive properly.
EBARA Fluid Handling 21
Page 22
PUMP MAINTENANCE AND REPAIR – SECTION E
MAINTENANCE AND REPAIR OF THE WEARING PARTS OF THE PUMP WILL MAINTAIN PEAK
OPERATING PERFORMANCE.
STANDARD PERFORMANCE FOR PUMP MODEL EFQT-3
Based on 70º F (21º C) clear water at sea level with minimum suction lift. Since pump installations
are seldom identical, your performance may be different due to such factors as viscosity, specific
gravity, elevation, temperature, and impeller trim.
Pump speed and operating condition points
must be within the continuous performance range
shown on the curve.
CAUTION!
EBARA Fluid Handling 22
Page 23
SECTION DRAWING
Figure 1 – Pump Model
EBARA Fluid Handling 23
Page 24
PARTS LIST
Pump Model EFQT-3
ITEM NO. PART NAME QTY PART NUMBER
01 PUMP CASING 01
02
03 SUCTION FLANGE 01
04 PIPE PLUG 01
05 HEX HD CAPSCREW 04
06 LOCKWASHER 04
07 * DISCH FLANGE GSKT 01
08 DISCHARGE FLANGE 01
09 NAME PLATE 01
10 DRIVE SCREW 04
11 * VALVE ASSEMBLY 01
12 ROTATION DECAL 01
13 HEX HD CAPSCREW 04
14 LOCKWASHER 04
15 ROT ASSY SCREW SET 04
16
17 CASING DRAIN PLUG 01
18
19 HEX NUT 02
20 LOCKWASHER 02
21 HAND NUT 01
22 STUD 02
23 BACK CVR PLATE ASSY 01
24 WARNING PLATE 01
25 DRIVE SCREW 04
26 CAUTION DECAL 01
27 PRESS RELIEF VALVE 01
28
29 HEX HD CAPSCREW 04
30
31 PIPE PLUG 01
32 CHECK VALVE PIN 01
33 PIPE PLUG 01
34 CLAMP BAR 01
35 HEX HD CAPSCREW 02
36
37 CLAMP BAR SCREW 01
38 FILL COVER ASSY 01
39 WARNING PLATE 02
40 DRIVE SCREW 02
41 BACK COVER PLATE 02
42 HEX HD CAPSCREW 04
43 LOCKWASHER 04
*
REPAIR ROTATING ASSY 01
*
WEAR PLATE ASSY 01
*
BACK COVER O’RING 01
*
FILL COVER GASKET 01
LOCKWASHER
*
FILL COVER GASKET 01
01
* INDICATES PARTS RECOMMENDED FOR STOCK
EBARA Fluid Handling 24
Page 25
SECTION DRAWING EFQT-3
SEAL AREA DETAIL
Figure 2 – Repair Rotating Assembly
DRIVE END VIEW
EBARA Fluid Handling 25
Page 26
EFQT-3
PART LIST
Repair Rotating Assembly
ITEM NO. PART NAME QTY PART NUMBER
01 * IMPELLER 01
02 * SEAL ASSEMBLY 01
03 SEAL PLATE 01
04 * INBOARD OIL SEAL 01
05 * SEAL PLATE GASKET 01
06 BEARING HOUSE 01
07 * INBOARD BALL BEARING 01
08 VENTED PLUG 01
09 * BEARING CAP OIL SEAL 01
10 SOCKET HD CAPSCREW 01
11 AIR VENT 01
12 IMPELLER WASHER 01
13 HEX HD CAPSCREW 04
14 LOCKWASHER 04
15 BEARING CAP 01
16 * SHAFT KEY 01
17 IMPELLER SHAFT 01
18 BEARING RETAINING RING 01
19 SIGHT GAUGE 01
20 PIPE PLUG 01
21 * BEARING CAP GASKET 01
22 * OUTBOARD BALL BEARING 01
23 BEARING HOUSING DRAIN PLUG 01
24 SEAL CAVITY DRAIN PLUG 01
25 HEX HD CAPSCREW 04
26 SEAL CAVITY DRAIN PLUG 01
27 SEAL PLATE O-RING 01
28 ROTATING ASSY O-RING 01
* INDICATES PARTS RECOMMENDED FOR STOCK
EBARA Fluid Handling 26
Page 27
PUMP AND SEAL DISASSEMBLY AND
REASSEMBLY
Review all SAFETY Information in Section A.
Follow the instructions on all tags, label and
decals attached to the pump.
This pump requires little service due to its
rugged, minimum-maintenance design.
However, if it becomes necessary to inspect
or replace the wearing parts, follow these
instructions which are keyed to the sectional
views (see Figures 1 and 2) and the
accompanying parts lists.
Many service functions may be performed
by draining the pump and removing the back
cover assembly. If major repair is required,
the piping and/or power source must be
disconnected. The following instructions
assume complete disassembly is required.
Before attempting to service the pump,
disconnect or lock out the power source and
take precautions to ensure that it will remain
inoperative. Close all valves in the suction
and discharge lines.
For power source disassembly and repair,
consult the literature supplied with the power
source, or contact your local power source
representative.
Before attempting to open or service the
pump:
1. Familiarize yourself with this manual.
2. Disconnect or lock out the power
source to ensure that the pump will
remain inoperative.
3. Allow the pump to cool if overheated.
4. Check the temperature before opening
any covers, plates, or plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cautiously.
7. Drain the pump.
WARNING!
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or
damage to equipment.
Back Cover and Wear Plate Removal
(Figure 1)
The wear plate (16) is easily accessible and
may be serviced by removing the back cover
assembly (23). Before attempting to service
the pump, remove the pump casing drain
plug (17) and drain the pump. Clean and
reinstall the drain plug.
Remove the hand nuts (21) and pull the
back cover and assembled wear plate from
the pump casing (1). Inspected the wear
plate, and replace it if badly scored or worn.
To remove the wear plate, disengage the
hardware (19 and 20).
Inspect the back cover O-ring (18) and
replace it if damaged or worn.
Suction Check Valve Removal
(Figure 1)
If the check valve assembly (11) is to
serviced, remove the check valve pin (32),
reach through the back cover opening and
pull the complete assembly from the suction
flange (3).
Further disassembly of the check valve is
not required since it must be replaced as
a complete unit. Individual parts are not
sold separately.
Rotating Assembly Removal
(Figure 2)
The rotating assembly may be serviced
without disconnecting the suction or
discharge piping; however, the power source
must be removed to provide clearance.
WARNING!
NOTE
EBARA Fluid Handling 27
Page 28
The impeller (1) should be loosened while
the rotating assembly is still secured to the
pump casing. Before loosening the impeller,
remove the seal cavity drain plug (24) and
drain the seal lubricant. This will prevent the
oil in the seal cavity from escaping when the
impeller is loosened. Clean and reinstall the
seal cavity drain plug.
Immobilize the impeller by wedging a block
wood between the vanes and the pump
casing, and remove the impeller cap screw
and washer (10 and 12).
Install a lathe dog on the drive end of the
shaft (17) with the “V” notch positioned over
the shaft keyway.
With the impeller rotation still blocked, see
Figure 3 and use a long piece of heavy bar
stock to pry against the arm of the lathe dog
in a counterclockwise direction (when facing
the drive end of the shaft). Use caution not
to damage the shaft or keyway. When the
impeller breaks loose, remove the lathe dog
and wood block.
NOTE
Do not remove the impeller until the rotating
assembly has been removed from the pump casing.
Figure 3 – Loosening impeller
(Figure 1)
Remove the hardware (13 and 14) securing
the rotating assembly to the pump casing.
Separate the Rotating assembly by pulling
straight away from the pump casing.
NOTE
A similar tool may be assembled using ½
inch pipe (schedule 80 steel or malleable
iron) and a standard tee (see Figure 4). All
threads are ½ inch NPT. Do not preassemble the tool.
TEE
APPROX. 6 IN.
(152MM) LONG
APPROX. 14 IN.
(356 MM) LONG
Figure 4. Rotating Assembly Tool
To install the tool, remove the air vent
(8, Figure 2) from the bearing housing,
and screw the longest length of pipe into
the vent whole until fully engaged. Install
the tee, and screw the handles into the
tee. Use caution when lifting the rotating
assembly to avoid injury to personnel or
damage to the assembly.
Remove the bearing housing and seal plate
O-rings (9 and 4).
Impeller Removal
(Figure 2)
With the rotating assembly removed from the
pump casing, unscrew the impeller from the
shaft. Use caution when unscrewing the
impeller; tension on the shaft seal spring will
be released as the impeller is removed.
Inspect the impeller and replace if cracked or
badly worn.
Remove the impeller adjusting shims tie and
tag the shims, or measure and record their
thickness for ease of reassembly.
EBARA Fluid Handling
28
Page 29
Seal Removal
(Figure 2)
Slide the integral shaft sleeve and rotating
portion of the seal off the shaft as unit.
Use a pair of stiff wires with hooked ends to
remove the stationary element and seat.
An alternate method of removing the
stationary seal components is to remove the
hardware (25 and 26), and separate the seal
plate (3) and gasket (5) from the bearing
housing (6). Position the seal plate on a flat
surface with the impeller side down. Use a
wooden dowel or other suitable tool to press
on the back side of the stationary seat until
the seat, O-rings, and stationary element
can be removed.
Remove the shaft sleeve O-ring.
If no further disassembly is required, refer to
seal installation.
Shaft and Bearing Removal and Disassembly
(Figure 2)
When the pump is properly operated and
maintenance, the bearing housing should
not require disassembly. Disassemble the
shaft and bearings only when there is
evidence of wear or damage.
Shaft and bearing disassembly in the field is
not recommended. These operations should
be performed only in a properly equipped
shop by qualified personnel.
Remove the bearing housing drain plug (23)
and drain the lubricant. Clean and reinstall
the drain plug.
Disengage the hardware (13 and 14) and
slide the bearing cap (15) and oil seal (9) off
the shaft. Remove the bearing cap gasket
(21), and press the oil seal from the bearing
cap.
Place a block of wood against the impeller
end of the shaft and tap the shaft and
assembled bearings (7 and 22) from the
bearing housing.
After removing the shaft and bearings, clean
and inspect the bearings in place as follows.
CAUTION!
EBARA Fluid Handling 29
Shaft and Bearing Reassembly and
installation
(Figure 2)
Clean the bearing housing, shaft and all
component parts (except the bearings) with
a soft cloth soaked in cleaning solvent.
Inspect the parts for wear or damage as
necessary.
Most cleaning solvents are toxic and
flammable. Use them only in a well-ventilated
area free from excessive heat, sparks, and
flame. Read and follow all precautions
printed on solvent containers.
Inspected the shaft for distortion, nicks or
scratches, or for thread damage on the
impeller end. Dress small nicks and burrs
with a fine file or emery cloth. Replace the
shaft if defective.
Position the inboard oil seal (7) in the
bearing housing bore with the lip positioned
as shown in figure 2. Press the oil seal into
the housing until the face is just flush with
the machined surface on the housing.
To prevent damage during removal from the
shaft, it is recommended that bearings be
cleaned and inspected in place. It is strongly
recommended that the bearings be replaced
any time the shaft and bearings are removed.
WARNING!
CAUTION!
NOTE
Position the inboard bearing (7) on the
shaft with the shielded side toward the
impeller end of the shaft. Position the
outboard bearing (22) on the shaft with
the integral retaining ring on the bearing
O .D. toward the drive end of the shaft.
The bearings may be heated to ease installation.
Na induction heater, hot oil bath, electric oven, or
hot plate may be used to heat the bearings.
Bearings should never be heated with a direct
flame or directly on a hot plate.
Page 30
NOTE
If a hot oil bath is used to heat the
bearings, both the oil and the container
must be absolutely clean. If the oil has
been previously used, it must be
thoroughly filtered.
Heat the bearings to a uniform temperature
no higher than 250º F (120º C), and slide
the bearings onto the shaft, one at a time,
until they are fully seated. This should be
done quickly, in one continuous motion, to
prevent the bearings from cooling and
sticking on the shaft.
After the bearings have been installed and
allowed to cool, check to ensure that they
have not moved away from the shaft
shoulders in shrinking. If movement has
occurred, use a suitable sized sleeve and a
press to reposition the bearings against the
shaft shoulders.
If heating the bearings is not practical, use a
suitable sized sleeve and an arbor (or hydraulic)
press to install the bearings on the shaft.
When installing the bearings onto the shaft,
never press or hit against the outer race, ball,
or ball cage. Press only on the inner race.
Secure the outboard bearing on the shaft
with the bearing retaining ring (18).
Slide the shaft and assembled bearings into
the bearing housing until the retaining ring
on the outboard bearing seats against the
bearing housing.
CAUTION!
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Press the outboard oil seal (9) into the
bearing cap (15) with the lip positioned as
shown in figure 2. Replace the bearing cap
gasket (21), and secure the bearing cap with
the hardware (13 and 14). Be careful not to
damage the oil seal lip on the shaft keyway.
Lubricate the bearing housing as indicated in
LUBRICATION.
CAUTION!
To prevent damage during removal from the
shaft, it is recommended that bearings be
cleaned and inspected in place. It is strongly
recommended that the bearings be replaced
any time the shaft and bearings are
removed.
Clean the bearing housing, shaft and all
component parts (except the bearings) with
a soft cloth soaked in cleaning solvent.
Inspect the parts for wear or damage and
replace as necessary.
Most cleaning solvents are toxic and
flammable. Use them only in a wellventilated area free form excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent containers.
Clean the bearings thoroughly in fresh
cleaning solvent. Dry the bearings with
filtered compressed air and coat with
light oil.
Bearings must be kept free of all dirt and
foreign material. Failure to do so will greatly
shorten bearing life. DO NOT spin dry
bearings. This may scratch the balls or races
and cause premature bearing failure.
Rotate the bearings by hand to check for
roughness or binding and inspect the
bearings balls. If rotation is rough or the
bearing balls are discolored, replace the
bearings.
The bearing tolerances provide a tight press
fit onto the shaft and a snug slip fit into the
bearing housing. Replace the bearings,
shaft, or bearing housing if the proper
bearing fit is not achieved.
If bearing replacement is required, remove
the outboard bearing retaining ring (18), and
use a bearing puller to remove the bearings
from the shaft.
Press the inboard oil seal (7) from the
bearing housing.
CAUTION!
WARNING!
CAUTION!
EBARA Fluid Handling 30
Page 31
Seal Installation
(Figures 2, 5, 6 and 7)
Most cleaning solvents are toxic and
flammable. Use them only in a wellventilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent
containers.
Clean the seal cavity and shaft with a cloth
soaked in fresh cleaning solvent. Inspect the
stationary seat bore in the seal plate for dirt,
nicks and burrs, and
The stationary seat bore must be completely
clean before installing the seal.
This seal is not designed for operation at
temperatures above 160 º F (71º C). Do
not use at higher operating temperatures.
WARNING!
remove any that exist.
RATAINER
SPRING
IMPELLER
IMPELLER
SHIMS
IMPELLER
SHAFT
BELLOWS
SPRING
CENTERING
WASHER
Figure 5 – Cartridge Seal Assembly
CAUTION!
ROTATING
ELEMENT
DRIVE BAND
CAUTION!
A new seal assembly should be installed any
time the old seal is removed from the pump.
Wear patters on the finished faces cannot be
realigned during reassembly. Reusing an old
seal could result in premature failure.
To ease installation of the seal, lubricate the
shaft sleeve O-ring and the external
stationary seat O-ring with a very small
amount of light lubricating oil. See Figure 5
for seal part identification.
SEAL PLATE
O-RINGS
SLEEVE
O-RING
STATIONARY
ELEMENT
INTEGRAL
SHAFT
SLEEVE
SHEAR
RING
(SHEARED)
STATIONARY
SEAT
If the seal plate was removed, install the seal
plate gasket (5). Position the seal plate over
the shaft and secure it to the bearing
housing with the hardware (25 and 26).
To prevent damaging the shaft sleeve O-ring
on the shaft threads, stretch the O-ring over
a piece of tubing 1-1/4 I.D. x 1-1/2 O.D x 2
inches long (32mm x 38mm x 51mm).
EBARA Fluid Handling 31
Page 32
Slide the tube over the shaft threads, and
then slide the O-ring off the and onto the
shaft. Remove the tube, and continue to
slide the O-ring down the shaft until it seats
against the shaft shoulder.
When installing a new cartridge seal
assembly, removes the seal from the
container, and removes the Mylar storage
tabs from between the seal faces.
CAUTION!
New cartridge seal assemblies are equipped
with Mylar storage tabs between the seal
faces. These storage tabs must be removed
before installing the seal.
Lubricate the external stationary seat O-ring
with light oil. Slide the seal assembly onto
the shaft until the external stationery seat Oring engages the bore in the seal plate.
Clean and inspect the impeller as described
in Impeller Installation and Adjustment.
Install the full set of impeller shims provided
with the seal, and screw the impeller onto
the shaft until it is seated against the seal
(see Figure 6).
O-RING ENGAGED
WITH SEAL PLATE
BORE
SHEAR RING
(UNSHEARED)
Figure 6. Seal Partially Installed
Continue to screw the impeller onto shaft.
This will press the stationary seat into the
seal plate bore.
NOTE
A firm resistance will be felt as the
impeller presses the stationery seat into
the seal plate bore.
As the stationery seat becomes fully seated,
the seal spring compresses, and the shaft
sleeve will break the nylon shear ring. This
allows the sleeve to slide down the shaft
until seated against the shaft shoulder.
Continue to screw the impeller onto the shaft
until the impeller, shims, and sleeve are fully
seated against the shaft shoulder (see
Figure 7).
STATIONARY SEAT
FULLY SEATED IN
SEAL PLATE BORE
SHEAR RING
(SHEARED)
Figure 7 – Seal Fully Installed
Measure the impeller-to-seal plate
clearance, and remove impeller adjusting
shims to obtain the proper clearance as
described Impeller Installation and
Adjustment.
If necessary to reuse an old seal in an
emergency, carefully separate the rotating
and stationary seal faces from the bellows
retainer and stationary seat.
A new seal assembly should be installed any
time the old seal is removed from the pump.
Wear patters on the finished reassembly.
Reusing an old seal could result in
premature failure.
Handle the seal parts with extreme care to
prevent damage. Be careful not to
contaminate precision finished faces; even
fingerprints on the faces with non-oil based
solvent and a clean, lint-free tissue. Wipe
lightly in a concentric pattern to avoid
scratching the faces.
CAUTION!
EBARA Fluid Handling 32
Page 33
Carefully wash all metallic parts in fresh
cleaning solvent and allow to dry thoroughly.
Do not attempt to separate the rotating
portion of the seal from the shaft sleeve
when reusing an old seal. The rubber
bellows will adhere to the sleeve during use,
and attempting to separate them could
damage the bellows.
Inspect the seal components for wear,
scoring, grooves, and other damage that
might cause leakage. Inspect the integral
shaft sleeve for nicks or cuts on either end. If
any components are worn, or the sleeve is
damaged, replace the complete seal; never
mix old and new seal parts.
Install the stationary seal element in the
stationary seat. Press this stationary
subassembly into the seal plate bore until it
seats squarely against the bore shoulder. A
push tube made from a piece of plastic pipe
would aid this installation. The I.D. of the
pipe should be slightly larger than the O.D.
of the shaft sleeve.
Slide the rotating portion of the seal
(consisting of the integral shaft sleeve,
spring centering washer, spring, bellows and
retainer, and rotating element) onto the shaft
until the seal faces contact.
Proceed with Impeller Installation and
Adjustment.
CAUTION!
Impeller Installation
(Figure 2)
Inspect the impeller, and replace it if cracked
or badly worn. Inspect the impeller and shaft
threads for dirt or damage, and clean or
dress the threads as required.
The shaft and impeller threads must be
completely clean before reinstalling the impeller.
Even the slightest amount of dirt on the threads
can cause the impeller to seize to the shaft,
making future removal difficult or impossible
without damage to the impeller or shaft.
CAUTION!
Install the same thickness of impeller
adjusting shims as previously removed.
Apply Never-Seez or equivalent to the shaft
threads and screw the impeller onto the
shaft until tight. Be sure the seal spring seats
squarely over the shoulder on the back side
of the impeller.
NOTE
At the slightest sign of binding,
immediately back the impeller off, and
check the threads for dirt. Do not try to
force the impeller onto the shaft.
A clearance of .025 to .040 inch (0.64 to
1.02mm) between the impeller and the seal
plate is recommended for maximum pump
efficiency. Measure this clearance, and add
or remove impeller adjusting shims as
required.
NOTE
If the rotating assembly has been installed
in the pump casing, this clearance may be
measured by reaching through the priming
port with a feeler gauge.
NOTE
Proceed with Rotating Assembly Installation
before installing the impeller cap screw and
washer (10 and 12). The rotating assembly
must be installed in the pump casing in order to
torque the impeller cap screw.
After the rotating assembly is installed in the
pump casing, coat the threads of the
impeller cap screw (10) with ‘Never-Sees’ or
equivalent compound, and install the
impeller washer (12) and caps crew; torque
the cap screw to 90 ft. lbs. (1080 in.lbs. or
12.4 m.kg.)
Rotating Assembly Installation
(Figure 2)
NOTE
If the pump has been completely
disassembled, it is recommended that the
suction check valve and back cover
assembly be reinstalled at this point. The
back cover assembly must be in place to
adjust the impeller face clearance.
EBARA Fluid Handling 33
Page 34
Install the bearing housing and seal plate Orings (27 and 28) and lubricate them with
light grease. Ease the rotating assembly into
the pump casing using the installation tool.
Be careful not to damage the O-rings.
Install the four screw sets of rotating
assembly adjusting screw (15) using the
same thickness as previously removed.
Secure the rotating assembly to the pump
casing with the hardware (13 and 14). Do
not fully tighten the cap screw until the back
cover has been set.
A clearance of .010 to .020 inch (0.25 to
0.51mm) between the impeller and the wear
plate is also recommended for maximum
pump efficiency. This clearance can be
obtained by adjust an equal of screw from
each rotating assembly screw set until the
impeller scrapes against the wear plate
when the shaft is turned. After the impeller
scrapes, adjust approximately .015 inch
(0.4mm) of clearance with the screw set.
NOTE
An alternate method of adjusting this
clearance is to reach through the suction
port with a feeler gauge and measure the
gap. Adjust rotating assembly screw
accordingly.
Suction Check Valve Installation
(Figure 1)
Inspect the check valve assembly (11), and
replace it if badly worn.
NOTE
The check valve assembly must be
replaced as a complete unit. Individual
parts are not sold separately.
Reach through the back cover opening with
the check valve (11), and position the check
valve adaptor in the mounting slot in the
suction flange (3). Align the adaptor with the
flange hole, and secure the assembly with
the check valve pin (32).
NOTE
If the suction or discharge flanges were
removed, replace the respective gaskets,
apply ‘Permatex Aviation No 3 Form-AGasket or equivalent compound to the
mating surfaces, and secure them to the
pump casing with the attaching
hardware.
Back cover Installation
(Figure 1)
If the wear plate (16) was removed for
replacement, carefully center it on the back cover
and secure it with the hardware (19 and 20). The
wear plate must be concentric to prevent binding
when the back cover is installed.
Replace the back cover O-ring (18), and
lubricate it with a generous amount of No.2
grease. Clean any scale or debris from the
contacting surfaces in the pump casing that
might interfere or prevent a good seal with
the back cover. Slide the back cover
assembly into the pump casing. Be sure the
wear plate does not bind against the
impeller.
NOTE
To ease future disassembly, apply a film
of grease or Never-Seez on the back
cover shoulder, or any surface which
contacts the pump casing. This action
will reduce rust and scale build-up.
Secure the back cover assembly by
tightening the hand nuts (21) evenly. Do not
over-tighten the hand nuts; they should be
just tight enough to ensure a good seal at
the back cover shoulder. Be sure the wear
plate does not bind against the casing.
PRESSURE RELIEF VALVE MAINTENANCE
(Figure 1)
The back cover is equipped with a pressure
relief valve (27) to provide additional safety for
the pump and operator (refer to Liquid
Temperature And Overheating in OPERATION).
It is recommended that the pressure relief valve
assembly be replaced at each overhaul, or any
time the pump overheats and activates the valve.
Never replace this valve with a substitute which
has not been specified or provided by EBARA.
EBARA Fluid Handling 34
Page 35
r
Periodically, the valve should be removed
for inspection and cleaning. When
reinstalling the relief valve, apply ‘Loctite
Pipe Sealant With Teflon No. 592’, o
equivalent compound, on the relief valve
threads. Position the valve as shown in
Figure 1 with the discharge port pointing
down.
Final Pump Assembly
(Figure 1)
Install the shaft key (16, Figure 2) and
reconnect the power source. Be sure to
install any guards used over the rotating
members.
DANGER!
Do not operate the pump without the
guards in place over the rotating parts.
Exposed rotating parts can catch
clothing, fingers, or tools, causing severe
injury to personnel.
Install the suction and discharge lines and
open all valves. Make certain that all piping
connections are tight, properly supported
and secure.
Be sure the pump and power source have
been properly lubricated, see
LUBRICATION.
Remove the fill cover assembly and fill the
pump casing with clean liquid. Reinstall the
fill cover and tighten it. Refer to
OPERATION, Section C, before putting the
pump back into service.
LUBRICATION
Seal Assembly
(Figure 2)
Before starting the pump, remove the vented
plug (8) and fill the seal cavity with
approximately 20 ounces (0.6 liters) of SAE
No. 30 non-detergent oil, or to a level just
below the tapped vented plug hole. Clean
and reinstall the vented plug. Maintain the oil
at this level.
Bearings
(Figure 2)
The bearing housing was fully lubricated
when shipped from the factory. Check the oil
level regularly through the sight gauge.
When lubrication is required, add SAE No.
30 non-detergent-oil through the hole for the
air vent (11). Do not over-lubricate. Overlubrication can cause the bearings to
overheat, resulting in premature bearing
failure.
NOTE
The white reflector in the sight gauge
must be positioned horizontally to
provide proper drainage.
Under normal conditions, drain the bearing
housing once each year and refill with
approximately 28 ounces (0.8 liters) clean
oil. Change the oil more frequently if the
pump is operated continuously or installed in
an environment with rapid temperature
change.
Monitor the condition of the bearing lubricant
regularly for evidence of rust or moisture
condensation. This is especially important in
areas where variable and cold temperatures
are common.
For cold weather operation, consult the
factory or a lubricant supplier for the
recommended grade of oil.
CAUTION!
Power Source
Consult the literature supplied with the
power source, or contact your local power
source representative.
EBARA Fluid Handling 35
Page 36
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