Xylem Goulds 3656 Manual

Models 3656 / 3756
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
INSTRUCTION MANUAL
IM010R010

2
TABLE OF CONTENTS
SUBJECT PAGE
Safety Instructions .................................................................... 2
Description and Specications.............................................. 2
Engineering Data ..................................................................... 2
Installation.................................................................................. 2
Location.................................................................................. 2
Close-Coupled Units........................................................... 2
Frame-Mounted Units ......................................................... 3
SAE Engine Driven Pumps ..................................................... 3
Coupling Alignment................................................................ 6
Frame-Mounted Units Only ............................................... 6
Piping.......................................................................................... 6
Suction.................................................................................... 6
Discharge............................................................................... 6
Wiring and Grounding............................................................ 7
Rotation ...................................................................................... 7
Operation................................................................................... 7
Maintenance.............................................................................. 7
Disassembly .............................................................................. 8
Reassembly................................................................................ 8
Packed Box Instructions .......................................................... 9
Troubleshooting .....................................................................10
Repair Parts..............................................................................11
Limited Warranty ....................................................................14
OWNER’S INFORMATION
Please ll in information and give this booklet to homeown-
er. Warranty information is on page 14.
Model Number:
Serial Number:
Dealer:
Dealer’s Phone No.
Date of Purchase: Installation Date:

3
ENGINEERING DATA
Maximum Liquid Temperature:
212º F (100º C) – standard seal or packing
250º F (120º C) – Optional high temp. seal
Maximum Working Pressure (Fluid temperature dependant):
– NPT connections, 200 PSI (1379 kPa)
– 125# ANSI anged connections, 200 PSI (1379 kPa)
Maximum Suction Pressure: 100 PSI (689.5 kPa)
Starts per Hour: 20, evenly distributed
Group Size Suction Discharge
1½ x 2-6 (H) 2" NPT 1½" NPT
1 x 2-7 2" NPT 1" NPT
2½ x 3-7 3" NPT 2½" NPT
S3 x 4-7 4" Flange 3" Flange
1 x 2-8 2" NPT 1" NPT
1½ x 2-8 2" NPT 1½" NPT
2 x 2-5 2" NPT 2" NPT
2½ x 2½-5 2½" NPT 2½" NPT
LH 3 x 3-5 3" NPT 3" NPT
4 x 4-5 4" Flange 4" Flange
5 x 5-6 5" Flange 5" Flange
2½ x 3-8 3" NPT 2½" NPT
3 x 4-8 4" Flange 3" Flange
4 x 5-8 5" Flange 4" Flange
1½ x 2-10 2" NPT 1½" NPT
2½ x 3-10 3" Flange 2½" Flange
M3 x 4-10 4" Flange 3" Flange
4 x 6-10 6" Flange 4" Flange
2½ x 3-13 3" Flange 2½" Flange
3 x 4-13 4" Flange 3" Flange
4 x 6-13 6" Flange 4" Flange
6 x 8-13 8" Flange 6" Flange
L 8 x 10-13 10" Flange 8" Flange
4 x 6-16 6" Flange 4" Flange
INSTALLATION
LOCATION
• Locate the pump as near liquid source as practical;
below level of liquid for automatic repriming capability.
• Allow adequate space for servicing and ventilation.
Protect the unit from weather and water damage due to
rain, ooding or freezing temperatures.
• Protect the pump and piping from freezing tempera-
tures.
• Allow adequate space around the unit for service and
ventilation.
CLOSE-COUPLED UNITS
• Units may be installed horizontally, inclined or vertically
with the motor above the pump.
• The motor feet MUST be bolted to a substantial surface
(horizontal or vertical) that is capable of complete and
rigid support for the pump and motor. For L-Group
pumps, the motor adapter feet must also be bolted to
the supportive surface.
• For vertical operation, the motor should be tted with a
drip cover or otherwise protected against liquid enter-
ing the motor (rain, spray, condensation, etc.)
NOTICE: DO NOT INSTALL WITH MOTOR
BELOW PUMP. ANY LEAKAGE OR
CONDENSATION WILL AFFECT THE MOTOR.
SAFETY INSTRUCTIONS
TO AVOID SERIOUS OR FATAL PERSONAL INJURY
OR MAJOR PROPERTY DAMAGE, READ AND
FOLLOW ALL SAFETY INSTRUCTIONS IN THE
MANUAL AND ON THE PUMP.
This is a SAFETY ALERT SYMBOL. When
you see this symbol on the pump or in
the manual, look for one of the following
signal words and be alert to the potential
for personal injury or property damage.
Warns of hazards that WILL cause
serious personal injury, death or major
property damage.
Warns of hazards that CAN cause
serious personal injury, death or major
property damage.
Warns of hazards that CAN cause
personal injury or property damage.
NOTICE: INDICATES SPECIAL INSTRUCTIONS
WHICH ARE VERY IMPORTANT AND
MUST BE FOLLOWED.
THIS MANUAL IS INTENDED TO ASSIST IN THE
INSTALLATION AND OPERATION OF THIS UNIT.
THOROUGHLY REVIEW ALL INSTRUCTIONS AND
WARNINGS PRIOR TO PERFORMING ANY WORK
ON THIS PUMP.
MAINTAIN ALL SAFETY DECALS.
NOTICE: INSPECT UNIT FOR DAMAGE AND
REPORT ALL DAMAGE TO CARRIER
IMMEDIATELY.
UNIT NOT DESIGNED FOR USE
WITH HAZARDOUS LIQUIDS OR
FLAMMABLE GASES.
This product can expose you to chemicals
including Lead which is known to the state
of California to cause cancer or birth defects or other
reproductive harm. For more information go to: www.
P65Warnings.ca.gov.
DESCRIPTION and SPECIFICATIONS
The series 3656/3756 are single stage, end suction, cen-
trifugal pumps for general liquid transfer, booster appli-
cations, irrigation and general service pumping. Pumps
are available in three different materials of construction:
all iron, bronze-tted and all bronze (“S” group only).
Pump impellers are fully enclosed, key driven and held in
position by an impeller bolt and washer. Casings are full
volute in design with replaceable wear rings.
Dependant on the pump size, the suction and discharge
connections will be threaded or anged. Shafts are pro-
tected with stainless steel shaft sleeves.
Close-coupled units have NEMA standard JM or JP mo-
tors with C-face mounting and key driven shaft extension.
SAE drive units bolt directly to the engine ywheel hous-
ing for SAE sizes 1, 2, 3, 4 or 5. Optional elastomer ele-
ment couplings are available for 6½, 7½, 8, 10, 11½ and
14 inch ywheels. Frame mounted units can be coupled
to motors through a spacer coupling, or belt driven.
DANGER
WARNING
CAUTION
WARNING
Hazardous fluids can
cause fire, burns
or death.
WARNING

4
per ANSI B16.1, class 125 for standard anges as indi-
cated. Maximum working pressure for class 30 cast iron,
per ANSI B16.1, is 175 PSI.
Internal combustion engines are variable speed and vari-
able power machines. The power output depends on the
engine speed (RPM) and will be reduced when operat-
ing altitude, and/or the air temperature increases. When
driving the pump at the RPM required to deliver water
into the system piping, the engine must operate within
the Engine Manufacturers minimum and maximum RPM
limits. The power output to supply the pump power
demand must not exceed the continuous power rating
of the engine, after derating for all power consuming
engine accessories, and adjustmaner for installation site
altitude and air temperature.
DRIVE-TRAIN SIZING (BHP)
The BHP Equation is: (Flow x TDH) / 3960 x Eff.)
Note: For internal combustion units the BHP calculation
must be de-rated for the following conditions:
• 20% for continuous duty
• 5% for right-angle drive
• 3% for each 1,000 feet above sea level
• 1% for each 10º F above 60º F.
DRIVE-TRAIN SIZING (TORQUE)
Other than sizing an engine for BHP, torque calculations
also are required for proper sizing. Typically the horsepow-
er and torque rating do not follow the same relationship
throughout the usable range of a diesel engine (Figure 2).
The equation for torque (lbs/ft) is (5250 x BHP) / RPM.
Figure 2: HP (◆) vs. Torque (■)
VERIFY MATCH OF PUMP END TO ENGINE
SAE Bracket Size:
Engine drive pumps are available to t engines having a
standard SAE 5 through SAE 1 ywheel housing.
For a new engine, the engine supplier can provide the
SAE housing number.
For an existing engine, the ywheel housing bore and
bolt circle can be measured and compared against the
standard SAE housing dimensions listed in Table 1, to
identify the housing SAE number.
• Measure the ywheel housing bore (A), and the bolt
circle (B), as accurately as possible with a tape measure
(to the nearest 1/32 inch).
• Count the number of threaded holes in the ywheel
housing (C). Test the threaded holes with a bolt, to
determine the thread series.
• Compare the measured dimensions (A), (B), and (C)
against Table 1, to determine the SAE number of
the ywheel housing, to be sure it matches the SAE
number of your pump.
Finished grouting
(1/4") Grout hole Base
Leveling wedges or shims—left in place
Top of foundation—
clean and wet down
Sleeve
Washer
Lug
(1/2 to 3/4")
Allowance
for leveling
Wood
frame
Grout
FRAME-MOUNTED UNITS
• A at substantial foundation surface MUST be provided
to avoid distortion and/or strain when tightening the
foundation bolts. A rubber mounting is acceptable to
reduce noise or excessive vibration.
• Tighten motor hold-down bolts BEFORE connecting
piping to pump.
Figure 1
• It is recommended that the baseplate be grouted to a
foundation with solid footing. Refer to Figure 1.
• Place unit in position on wedges located at four points,
two below approximate center of driver and two below
approximate center of pump. Adjust wedges to level
unit. Level or plumb suction and discharge connections.
• Make sure bedplate is not distorted and nal coupling
alignment can be made within the limits of movement
of motor and by shimming, if necessary.
• Tighten foundation bolts nger tight and build dam
around foundation. Pour grout under bedplate mak-
ing sure the areas under the pump and motor feet are
lled solid. Allow grout to harden 48 hours before fully
tightening foundation bolts.
• Tighten pump and motor hold-down bolts before
aligning shaft or connecting the piping to pump.
• Allow grout to harden for 48 hours before tightening 4
foundation bolts.
SAE – ENGINE DRIVEN PUMPS
The SAE engine drive bearing frame is designed to
bolt directly to the ywheel housing for engines with
an SAE no. 1, 2, 3, 4 or 5 mount. The pump shaft exten-
sion is sized for use with couplings bolted directly to the
ywheel. Goulds Water Systems optional couplings are
sized for 6½", 7½", 8", 10", and 14" ywheels. Although
other ywheel mount couplings may be used, it is recom-
mended that the Goulds Water Systems coupling be
used to ensure long and trouble-free operation from
your Goulds Pump.
REQUIREMENTS FOR PROPER OPERATION
Pump End:
When delivering the required capacity (GPM) to the
system piping, the pump must add the amount of Head
required by the system at the capacity. The operating
head-capacity point should be as close as possible to the
highest efciency line shown on the performance curve,
and must be below the head-capacity line labeled “maxi-
mum” RPM. The maximum operaton RPM for the pump is
determined by bearing life, or in some cases, by the pres-
sure limits of the pump. Suction and discharge openings
are NPT tapped for standard pipe, or faced and drilled
600
500
400
300
200
100
0
1500 1600 1700 1800 1900 2000 2100 2200 2300
RPM
TORQUE (LBS/FT)
180
178
176
174
172
170
168
166
164
162
160
HP

5
SAE Flywheel Housing Size
1 2 3 4 5
A 201⁄8175⁄8161⁄8141⁄4123⁄8
B 207⁄8183⁄8167⁄815 131⁄8
CNo. 12 12 12 12 8
Size 7⁄16-14 3⁄8-16 3⁄8-16 3⁄8-16 3⁄8-16
INSTALLATION
• The pump may be installed horizontally, with the dis-
charge rotated to any position allowed by the casing
bolt pattern (13). It is recommended that the discharge
be located horizontally, above the suction.
• The casing must be supported on all pumps by a rigid
support which is anchored to the unit base or foundation.
• For M-Group pumps it is recommended that this support
is bolted to the motor adapter ring using 2 or more of
the casing bolts (13). It is likely that longer bolts will be
required for the additional support thickness. Use SAE
grade 5 bolts, torqued as indicated in this manual.
• For L-Group pumps it is recommended that the pump
is supported beneath the two feet cast into the motor
adapter (3). These feet must be bolted to the support.
PUMP TO ENGINE ASSEMBLY (SPLINE COUPLING)
Preparation for Assembly of Pump on Engine
• Clean face and register t of ywheel housing and
ywheel as necessary to remove all grease, dirt, or rust
(and all traces of rust preventative) which would inter-
fere with installation of pump and/or prevent correct
alignment. If ywheel is tted with a pilot bearing for a
transmission shaft, remove and discard. The pilot bear-
ing is not required for installation of the pump end, and
could interfere with the pump shaft.
• Examine shaft spline closely. Use a le, if necessary, to
remove any burrs that would prevent coupling from
sliding freely onto the shaft.
• Lubricate pump shaft spline sparingly with light grease.
Don’t lubricate straight keyed shaft.
• Slide the coupling onto shaft until it is stopped against
the shaft (refer to page 5 for straight shaft installation).
• Measure the distance from the engine side of the y-
wheel coupling adapter ring to the mounting face of the
pump bracket. Refer to Figure 4 below, Dimension “A”.
• Next, measure depth from face of ywheel housing on
engine, to face on ywheel against which coupling will
be bolted. Refer to Figure 4 below, Dimension “B”.
• Pump measurement must be less than engine measure-
ment or axial interference will result in thrust force on
engine crank shaft bearings. Simply stated, Dimension
“A” must be less than Dimension “B”.
FLYWHEEL COUPLING
• The ywheel coupling transmits power from the engine
ywheel to the pump shaft. The maximum power that a
coupling can safely handle is shown by a rating number,
“R”, which is listed in the coupling dimensions tables.
• When selecting a ywheel coupling for a pump and
engine, rst determine the power rating that the pump
will demand. On the pump performance curve, nd the
RPM and BHP values required to produce the spplica-
tion head-capacity point.
• Divide the BHP by the RPM, then multiply the result
times 100. The result will be the demand number for
the pump. For example, a 20BFSAE1AO can deliver
800 GPM at 270 feet Total Head when running at 1800
RPM. The power required by the pump will be 75 BHP.
The demand number will be: (75 / 1800) x 100 = 4.16
• Next, select a coupling that can safely transmit the
power, and which will t the ywheel dimensions. For a
coupling to be suitable, it must have an “R” rating num-
ber GREATER THAN the pump demand number. In the
above example, the minimum coupling “R” number
whould be 5.
• Torsional compatibility of the engine, pump, and cou-
pling is the responsibility of the assembler. Goulds Wa-
ter Systems will supply data for the pump and coupling
for use by the assembler for a torsional analysis.
NOTE: If the ywheel is tted with a pilot bearing
pressed into a bore at the center, remove it to avoid inter-
ference with the pump shaft.
Flywheel
Housing
Dimensions
Figure 3
Table 1
Figure 4 Figure 5

6
FLYWHEEL FOR INDUSTRIAL TYPE OVERCENTER
CLUTCHES
• Figure 6 shows the hollowed-out appearance of the y-
wheels made for use with overcenter type clutch power
take-off assemblies.
• These ywheels will have a recessed bore machined
into the face, and a set of tapped holes, which will be
used to attach the coupling to the ywheel. Dimen-
sions are governed by an SAE standard and are listed
in Tables 1A and 1B, Figure 3. The “clutch size” shown in
the table is the nominal clutch facing diameter for Drive
Ring Type Overcenter Clutches.
OTHER FLYWHEELS
• Some engines are tted with ywheels especially
machined for coupling to other kinds of machinery
(electrical generators, torque converters, etc.), and
require nonstandard ywheel couplings. These may be
purchased from third party vendors or suppliers.
Figure 6
Table IA –
Wide RPM Range, Elastomer Mounted Hub – Spline Shaft
Flywheel Dimensions Flywheel Coupling (Spline)
Clutch D Shaft
Size Qty. Size E BC F G H R* Catalog Spline
(UNC) Number Dia.
6½" 6 5⁄16-18 8½ OD 7.88 3.94 1.19 1.69 7 A00569C 1 1½" 10T
7½" 8 5⁄16-18 9½" OD 8.75 3.69 1.19 1.69 7 A00569C 2 1½" 10T
8" 6 3⁄8-16 103⁄8" OD 9.62 4.81 2.44 2.94 7 A00569C 3 1½" 10T
10" 8 3⁄8-16 123⁄8" OD 11.62 4.47 2.13 2.75 7 A00569C 4 1½" 10T
10" 8 3⁄8-16 123⁄8" OD 11.62 4.47 2.13 2.75 9 A00569C 6 1½" 10T
11½" 8 3⁄8-16 137⁄8" OD 13.12 5.06 1.56 2.69 7 A00569C 5 1½" 10T
11½" 8 3⁄8-16 137⁄8" OD 13.12 5.06 1.56 2.69 9 A00569C 7 1½" 10T
14" 8 ½-13 183⁄8" OD 17.25 6.63 1.00 2.13 9 A00569C 8 1½" 10T
* R = Coupling Rating Max.
Coupling Rating = (Rated horsepower x 100) / Rated RPM
Table IB –
Wide RPM Range, Elastomer Mounted Hub – Straight
Shaft
Flywheel Dimensions Flywheel Coupling
Clutch D Shaft
Size Qty. Size E BC F G H R* Catalog Spline
(UNC) Number Dia.
6½" 6 5⁄16-18 8½ OD 7.88 3.94 1.19 1.69 2.28 CD616
3.51 CD625
7½" 8 5⁄16-18 9½" OD 8.75 3.69 1.19 1.69 2.28 CD716
3.51 CD725
8" 6
3⁄8-16 103⁄8" OD 9.62 4.81 2.44 2.94 2.28 CD816
3.51 CD825
2.28 CD1016
3.51 CD1025
10" 8 3⁄8-16 123⁄8" OD 11.62 4.47 2.13 2.75 5.71 CD1030
8.57 CD1050
11.23 CD1080
2.28 CD1116
3.51 CD1125
5.71 CD1130
11½" 8 3⁄8-16 137⁄8" OD 13.12 5.06 1.56 2.69 8.57 CD1150
11.23 CD1180
12.62 CD1190
16.85 CD11110H
2.28 CD1416
3.51 CD1425
5.71 CD1430
14" 8 3⁄8-16 183⁄8" OD 17.25 6.63 1.00 2.13 8.57 CD1450
11.23 CD1480
12.62 CD1490
16.85 CD14110H
Dimensions in inches
* R = Coupling Rating Max.
Coupling Rating = (Rated horsepower x 100) / Rated RPM
• For Goulds Water Systems straight shaft keyed cou-
plings – Ensure that the coupling hub set screw is
backed out enough to ensure clearance for the shaft
key during assembly.
• Mount the coupling assembly to the engine ywheel
using the bolts provided torqued as follows in a cross-
ing sequence:
6½" or 7½" Flywheel – 11 lbs.-ft. (15 N.m)
8", 10" or 11½" Flywheel – 20 lbs.-ft. (27 N.m)
14" Flywheel – 50 lbs.-ft. (68 N.m)
(For other couplings follow manufacturers
recommended installation procedure.)
• Place the pump shaft key into the pump shaft (122) and
align the shaft to the coupling. Slide the pump into the
coupling until the engine adapter ring (340) contacts
the engine ywheel housing.
INSTALLATION OF COUPLING ON FLYWHEEL
Flywheel Coupling Overcenter Type:
• These couplings are aligned concentrically with the
ywheel by register t on the ywheel.
• Be sure to remove all preservatives from the engine’s
ywheel.
• Fit the coupling into the ywheel. Align the bolt holes
and engage coupling with register t on ywheel. Tap
coupling with a soft heavy hammer, if necessary, to be
sure that it is seated at against ywheel. Secure cou-
pling tightly to ywheel with capscrews and lockwasher.
1.625-
1.624Ø
3⁄8x 3⁄16
Keyway

7
INSTALLATION OF PUMP ON ENGINE
• Lift pump with suitable lifting apparatus and align
pump shaft with coupling. End of pump shaft has a pilot
diameter which epermits wasy engagement of pump
shaft into coupling.
• Reach into pump suction opening and rotate impeller
slightly until the shaft will engage the coupling. Verify
that there is no gap between bracket and ywheel
housing faces. Rotate pump as necessary to align
bracket holes with engine. Install capscrews and bolt
pump end securely to engine.
NOTE: If any interference, or incompatibility of parts is
detected during installation, DO NOT proceed
with assembly. Direct the problem to your
nearest Goulds distributor.
• Mount the pump to the engine using the bolts and
lock-washers provided, torqued as follows in a crossing
sequence:
SAE #2, #3, #4, #5 – 20 lbs.-ft. (27 N.m)
SAE #1 – 50 lbs.-ft. (68 N.m)
• Install coupling guards (501N).
• Bolt motor adapter (3) to the rigid support described
above.
COUPLING ALIGNMENT
FAILURE TO DISCONNECT AND
LOCKOUT ELECTRICAL POWER
BEFORE ATTEMPTING ANY
MAINTENANCE CAN CAUSE
SEVERE PERSONAL INJURY.
FRAME-MOUNTED UNITS ONLY
• Alignment MUST be checked prior to running. See
Figure 7.
Figure 7
• Tighten all hold-down bolts before checking alignment.
• If realignment is necessary, always move the motor.
Shim as required.
• Parallel misalignment, shafts with axis parallel but not
concentric. Place dial indicator on one hub and rotate
this hub 360° while taking readings on the outside di-
ameter of the other hub. Parallel alignment is achieved
when reading is 0.010" (0.254 mm) TIR, or less.
• Angular misalignment, shaft with axis concentric but not
parallel. Place dial indicator on one hub and rotate this
hub 360° while taking readings on the face of the other
hub. Angular alignment is achieved when reading is
0.020" (0.508 mm) TIR, or less.
• Final alignment is achieved when parallel and angular re-
quirements are satised with motor hold-down bolts tight.
NOTICE: ALWAYS RECHECK BOTH ALIGNMENTS
AFTER MAKING ANY MECHANICAL
ADJUSTMENTS.
PIPING
• Piping should be no smaller than pump’s discharge and
suction connections and kept as short as possible, avoid-
ing unnecessary ttings to minimize friction losses. See
Table 1.
• All piping MUST be independently supported and
MUST NOT place any piping loads on the pump
NOTICE: DO NOT FORCE PIPING INTO PLACE
AT PUMP SUCTION AND DISCHARGE
CONNECTIONS.
• All pipe joints MUST be airtight.
PIPING – SUCTION
• For suction lifts over 10 ft. (3 m) and liquid temperatures
over 120°F (49°C), consult pump performance curve for
net positive suction head required (NPSHR).
• If a pipe size larger than pump suction is required, an ec-
centric pipe reducer, with the straight side up, MUST be
installed at the pump suction.
• If pump is installed below the liquid source, install a gate
valve in the suction for pump inspection and mainte-
nance.
NOTICE: DO NOT USE THE GATE VALVE TO
THROTTLE PUMP. THIS MAY CAUSE LOSS
OF PRIME, EXCESSIVE TEMPERATURES
AND DAMAGE TO PUMP, VOIDING
WARRANTY.
• If the pump is installed above the liquid source, the fol-
lowing MUST be provided:
• To avoid air pockets, no part of the piping should be
above the pump suction connection.
• Slope the piping upward from liquid source.
• Use a foot valve or check valve ONLY if necessary for
priming or to hold prime during intermittent duty.
• The suction strainer or suction bell MUST be at least
3 times the suction pipe diameter area.
• Insure that the size and minimum submergence over suc-
tion inlet is sufcient to prevent air from entering pump
through a suction vortex. See Figures 8 through 11.
Hazardous machinery
can cause personal
injury or death.
WARNING
Parallel
Angular
Figure 10 Figure 11
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
H
1 2 3 4 5 6 7 8 9 10 11 1213 14 15 16 V
H = Min. Submergence in feet
V = Velocity in feet per second
=GPM x 0.321 GPM x 0.4085
Area D2
1.5D
min.
3.0D
min.
D D
H min.
Dmin.
2
---------
---------
D
H min.
D
H min.
---------
---------
Figure 8 Figure 9

8
PIPING – DISCHARGE
• Install a check valve suitable to handle the ow, liquids
and to prevent backow. After the check valve, install an
appropriately sized gate valve to be used to regulate the
pump capacity, pump inspection and for maintenance.
• When required, pipe increaser should be installed be-
tween the check valve and the pump discharge.
WIRING AND GROUNDING
Install, ground and wire accord-
ing to local and National Electrical
Code Requirements.
Install an all leg electrical power
disconnect switch near the pump.
Disconnect and lockout electrical
power before installing or servic-
ing the pump.
Electrical supply MUST match
pump’s nameplate specications. In-
correct voltage can cause re, dam-
age motor and void the warranty.
Motors without built-in protection MUST be pro-
vided with contactors and thermal overloads for
single phase motors, or starters with heaters for
three phase motors. See motor nameplate.
• Use only copper wire to motor and ground. The ground
wire MUST be at least as large as the wire to the motor.
Wires should be color coded for ease of maintenance.
• Follow motor manufacturer’s wiring diagram on the mo-
tor nameplate or terminal cover carefully.
FAILURE TO PERMANENTLY GROUND
THE PUMP, MOTOR AND CONTROLS
BEFORE CONNECTING TO ELECTRICAL
POWER CAN CAUSE SHOCK, BURNS
OR DEATH.
ROTATION
NOTICE: INCORRECT ROTATION MAY CAUSE
DAMAGE TO THE PUMP AND VOIDS
THE WARRANTY.
• Correct rotation is right-hand, CLOCKWISE when viewed
from the motor end. For frame mounted units, switch
power on and off quickly to observe rotation. On close
coupled units, remove motor end plug or cover to ob-
serve rotation.
• To reverse three phase motor rotation, interchange any
two power supply leads.
OPERATION
DO NOT OPERATE FRAME MOUNTED
OR SAE UNITS WITHOUT SAFETY
GUARDS IN PLACE OR SEVERE
PERSONAL INJURY MAY RESULT.
SPLASHING OR IMMERSING OPEN
DRIP PROOF MOTORS IN FLUID CAN
CAUSE FIRE, SHOCK, BURNS OR
DEATH.
OPERATION AT OR NEAR ZERO
FLOW CAN CAUSE EXTREME HEAT,
PERSONAL INJURY OR PROPERTY
DAMAGE.
NOTICE: NO NOT RUN PUMP DRY OR SEAL
DAMAGE WILL RESULT.
• After stabilizing the system at normal operating condi-
tions, check the piping. If necessary, adjust the pipe
supports.
• On frame-mounted units, coupling alignment may have
changed due to the temperature differential between
pump and motor. Recheck alignment following pro-
cedures and hazard warnings in “COUPLING ALIGN-
MENT” section of this manual.
MAINTENANCE
FAILURE TO DISCONNECT AND
LOCKOUT ELECTRICAL POWER
BEFORE ATTEMPTING ANY
MAINTENANCE CAN CAUSE SHOCK,
BURNS OR DEATH.
FAILURE TO RELIEVE SYSTEM
PRESSURE AND DRAIN SYSTEM
BEFORE ATTEMPTING ANY
MAINTENANCE CAN CAUSE
PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH.
IF PIPING HAZARDOUS OR TOXIC
FLUIDS, SYSTEM MUST BE FLUSHED
PRIOR TO PERFORMING SERVICE.
CLOSE-COUPLED UNITS
• Bearings are located in and are part of the motor. For
lubrication information, refer to motor manufacturer’s
instructions.
FRAME-MOUNTED UNITS
• Model 3756 S-group has greased for life bearings.
No regreasing is possible or necessary.
• Model 3756 M or L-group bearing frame and SAE drive
bearing frame should be regreased every 2,000 hours
or at a three month interval, whichever occurs rst. Use
a #2 sodium or lithium based grease. Fill until grease
comes out of relief ttings, or lip seals, then wipe off
excess.
• Follow motor or engine and coupling manufacturer’s
lubrication instructions.
• Recheck alignment.
WARNING
Hazardous voltage
can shock, burn or
cause death.
WARNING
Hazardous
voltage
Hazardous machinery
can cause personal
injury or death.
WARNING
WARNING
Hazardous voltage
can shock, burn or
cause death.
Extreme heat can
cause personal injury
or property damage.
WARNING
Hazardous fluids can
cause personal injury
or property damage.
WARNING
WARNING
Hazardous voltage
can shock, burn or
cause death.
Hazardous pressure can
cause personal injury,
property damage or death.
CAUTION

9
SEASONAL SERVICE
• To REMOVE pump from service, remove drain plug
and drain all unprotected piping.
• To RETURN pump to service, replace drain plug using
Teon™ tape or equivalent on male threads.
• Reconnect suction line if removed, examine union and
repair if necessary.
• Refer to OPERATION section of manual.
DISASSEMBLY
• Follow ALL warnings and instructions in the “MAINTE-
NANCE” section of this manual.
• Close-coupled units: Remove motor hold-down bolts.
• Frame-mounted units: Remove coupling guard, spacer,
coupling and frame hold-down bolts.
LIQUID END
1. Remove casing bolts (13).
2. Remove back pull-out assembly from casing (1).
3. Remove casing wear ring (4) if excessively worn.
NOTICE: DO NOT INSERT SCREWDRIVER BETWEEN
IMPELLER VANES TO PREVENT ROTATION.
4. On close-coupled units, remove motor end plug or
cover to expose screwdriver slot or ats on end of
motor shaft.
5. While restraining shaft with an appropriate tool (close-
coupled units) or with a strap wrench (frame-mounted
units) remove impeller bolt (6). Impeller bolt may need
to be heated with torch to remove. Discard.
NOTICE: EXERCISE CAUTION WHEN HANDLING
HOT IMPELLER BOLT.
NOTICE: FOR SAE DRIVE UNITS, REMOVE IMPELLER
NUT SET SCREW (22A) PRIOR TO
REMOVING IMPELLER NUT (22). IMPELLER
SET SCREW AND IMPELLER NUT MAY NEED
TO BE HEATED TO BE REMOVED.
6. Remove impeller washer (7).
7. Insert two pry bars, 180 ° apart, between impeller (2) and
seal housing (3). CAREFULLY pry off impeller.
8. Remove impeller key (8).
9. Remove seal housing bolts (14) and seal housing (3)
pulling with it the mechanical seal assembly. Discard
seal assembly and seal housing o-ring (9). For packed
box pumps see “PACKED BOX INSTRUCTIONS”.
10. Remove adapter (108).
11. Inspect shaft sleeve (11). If badly scored, remove by
heating with torch. Discard.
12. Push out the mechanical seal stationary seat from the
seal housing. Discard.
13. On units equipped, remove seal housing wear ring (5)
if excessively worn.
DISASSEMBLY OF BEARING FRAME OR
SAE BEARING FRAME
1. Remove deector (123) from shaft.
2. Remove bearing cover (134).
3. Remove shaft assembly from frame.
4. Remove lip seals (138, 139) from bearing frame (228)
and bearing cover (134) if worn. Discard.
5. Remove retaining ring (361).
6. Use bearing puller or arbor press to remove ball
bearings (112, 168).
REASSEMBLY
• All parts should be cleaned before assembly.
NOTICE: O-RING SHOULD BE REPLACED AFTER ANY
DISASSEMBLY OF UNIT.
BEARING FRAME
1. Replace lip seals if removed.
2. Replace ball bearings if loose, rough or noisy when
rotated.
3. Check shaft (122) for runout. Maximum permissible is
0.002" (0.05 mm) TIR.
4. Refertothe“MAINTENANCE”sectionofthismanual
for M-group bearing frame regreasing instructions.
LIQUID END
1. Inspect shaft removing any debris or burrs.
2. Treat shaft with LOCQUIC® Primer “T”, or equivalent,
following manufacturer’s instructions carefully.
3. When replacing shaft sleeve, spray new shaft sleeve’s
bore with LOCQUIC® Primer “T”, or equivalent. Let
parts dry and then apply LOCTITE®#262 on the same
surfaces. Slide new sleeve over shaft with a twisting mo-
tion, wipe off excess. Let cure according to instructions.
NOTICE: MECHANICAL SEAL MUST BE REPLACED
WHENEVER SEAL HAS BEEN REMOVED.
FOLLOW SEAL MANUFACTURER’S
INSTRUCTIONS CAREFULLY. FOR PACKED
BOX PUMPS SEE “PACKED BOX
INSTRUCTIONS”.
4. Replace seal housing wear ring, if removed.
5. For mechanical seal pumps, stationary seal seat may
be dipped in water to ease installation. Place station-
ary seal seat squarely into seal housing bore. Cover
the polished face of the seat with a thin piece of
cardboard or paper towel. Press seat rmly into bore
using a round piece of plastic or wood that disperses
the force over the entire seal face. NOTE: If mechani-
cal seal is supplied with a spring retainer, remove and
discard the retainer.
6. Place adapter, concave face pointing up, over motor
shaft and lower it onto the motor.
7. Replace seal housing o-ring. This o-ring may be
lubricated with water or glycerin to ease in
installation. Install seal housing on adapter. Exercise
care in that the motor shaft does not dislodge or
damage seal seat.
8. Fully and squarely install the rotary assembly of seal
against the stationary seat.
NOTICE: REPLACE IMPELLER BOLT AND WASHER
WHENEVER IMPELLER IS REMOVED.
9. Install impeller key in shaft keyway. Mount impeller on
shaft and push until it bottoms. Hold in place. For SAE
units, apply LOCTITE 271 to the impeller bore, key-
way and shaft. Mount impeller on shaft and push until
it bottoms. Hold in place.
10. Install new impeller washer. Impeller washer not used
for SAE units.

10
11. Apply LOCTITE® #271 or equivalent, to new impeller
bolt threads and tighten to:
3⁄8"-16 bolts 20 lbs.-ft. (27 N.m)
½"-13 bolts 38 lbs.-ft. (51 N.m)
Impeller bolt not used for SAE units.
12. For SAE units apply LOCTITE®#271 to the external
threads of the shaft and internal threads of the
impeller nut (22). Tighten impeller nut to the following:
½"-Impeller Nut (SAE M-Group) 80 lbs.-ft. (107 N.m)
¾"-Impeller Nut (SAE L-Group) 100 lbs.-ft. (134 N.m)
13. For SAE units, after impeller nut (22) has been
installed, apply LOCTITE® #271 to set screw (22A).
Install impeller set screw into face of impeller nut (22)
and tighten hand-tight.
14. Replace casing wear ring, if removed.
15. Replace casing bolts and tighten, in a crossing se-
quence, to torque values indicated below:
3⁄8"-16 bolts (bronze casing) 25 lbs.-ft. (34 N.m)
½"-16 bolts (cast iron casing) 37 lbs.-ft. (50 N.m)
½"-13 bolts (cast iron casing) 90 lbs.-ft. (122 N.m)
¾"-10 bolts (cast iron casing) 175 lbs.-ft. (237 N.m)
16. Check reassembled unit for binding by rotating shaft
with appropriate tool from motor end.
17. If rubbing exists, loosen casing bolts and proceed
with tightening sequence again.
18. Replace motor hold-down bolts and motor end plug
or cover on close-coupled units.
19. Replace coupling, spacer, coupling guard and frame
hold-down bolts on frame-mounted units.
NOTICE: ALWAYS RECHECK BOTH ALIGNMENTS
AFTER MAKING ANY ADJUSTMENTS.
20. Refer to the “COUPLING ALIGNMENT” section of
this manual to realign shaft.
21. Assembly is complete.
PACKED BOX
1. Make sure stufng box is free of foreign materials and
clean before beginning packing of packed box. Refer
to Sectional Assembly in the repair parts section.
2. Take special care during installation of packing rings
because they are die-formed. To install, twist the ring
sideways just enough to t it around the shaft sleeve.
DO NOT ATTEMPT TO PULL RINGS STRAIGHT
OUT. See Figure 12.
Figure 12
CORRECT WRONG
3. Install the two piece Teon lantern ring supplied as
shown in gure 13. Note: two pieces make one ring.
Notches on ring must face each other, but alignment
is not necessary.
4. Install the packing rings and lantern ring in the fol-
lowing sequence to pack the packed box. Install
two rings of packing, then the lantern ring, followed
by the nal three rings of packing. Install each ring
separately and rmly seat. The use of a wooden split
bushing is recommended to accomplish this. See
Figure 14. Use gland to jack the bushing and ring into
the box. Stagger joints in each ring 90°. Make sure the
ush tap in the packed box lines up with the center of
the lantern ring. Any extra rings are spares.
5. Tighten gland nuts evenly, but not tight. When the
pump is started, slowly tighten the gland nuts until
the leak rate is between 40 and 60 drops per minute.
A grease lubricant can be used when the pumpage
contains abrasive particles or for a suction lift condi-
tion.
REMOVAL OF PACKED BOX
• Follow these steps to remove the packing from the
packed box.
1. Remove gland assembly.
2. With a “packing hook” remove packing.
3. Insert a wire hook into the ring on the outer edge to
remove the lantern ring.
4. Clean the packed box.
PRIME SAFE ARRANGEMENT
(Optional – M & L Group Only)
• The Prime Safe arrangement can be provided with
grease or an oiler feed lubrication.
1. The grease gland (24) will have the letters "G" and
"O"
stamped on the outside diameter and have two 1⁄8"
NPT
connections for mounting a grease feeder or oiler.
Teon Lantern Ring
Figure 13
Figure 14
STUFFING
BOX
WOODEN “SPLIT BUSHING”
SHAFT
GLAND

11
2. For grease feed applications, the grease gland is
assembled with the “G” stamp in the 12 o' clock posi-
tion. The grease feeder (23) will mount in the grease
gland at a 30 degree angle from the horizontal. This is
done to gain access to the
grease tting located on the grease feeder. The lip
seal (26) mounted in the grease gland will be assem-
bled as shown in Figure 15.
3. For oiler feed applications, the grease gland is
assembled with the “O” stamp in the 12 o' clock
position. The two 1⁄8" NPT connections on the grease
gland will be located on the horizontal, which is to
ensure proper function of the oiler. The lip seal (26) is
to be mounted in the reverse or opposite direction as
shown in Figure 10.
4. The mounting of a grease feeder or oiler may require
additional pipe extensions and/or ttings that will be
provided from the factory as needed.
5. The grease feeder (23) will come with three springs
(blue, red and silver). The use of the different springs
will be varied depending on the operating tempera-
ture and the lubricant (grease) to be used.
Grease Feeder Spring Size
Operating Temperature No. 1 Grease No. 2 Grease No. 3 Grease
-10ºF (-23ºC) to 40ºF (4ºC) SILVER RED —
-40ºF (-40ºC) to 110ºF (43ºC) SILVER SILVER RED
-110ºF (-79ºC) to 200ºF (93ºC) BLUE SILVER SILVER
Use SAE 30W oil for oiler application.
Figure 15
23
26
24
TROUBLESHOOTING GUIDE
DISCONNECT AND LOCKOUT
ELECTRICAL POWER BEFORE
ATTEMPTING ANY MAINTENANCE.
FAILURE TO DO SO CAN CAUSE A
SHOCK, BURN OR DEATH.
SYMPTOM
MOTOR NOT RUNNING
See Probable Cause – 1 through 5
LITTLE OR NO LIQUID DELIVERED
See Probable Cause – 6 through 13
EXCESSIVE POWER CONSUMPTION
See Probable Cause – 3, 13, 14, 15
EXCESSIVE NOISE and VIBRATION
See Probable Cause – 3, 6, 7, 10, 12, 14, 16, 17
PROBABLE CAUSE
1. Motor thermal protector tripped
2. Open circuit breaker or blown fuse
3. Impeller binding
4. Motor improperly wired
5. Defective motor
6. Pump is not primed, air or gases in pumpage
7. Discharge, suction plugged or valve closed
8. Incorrect rotation (3 phase only)
9. Low voltage or phase loss
10. Impeller worn or plugged
11. System head too high
12. NPSHA too low – Excessive Suction lift or losses
13. Incorrect impeller diameter
14. Discharge head too low – excessive ow rate
15. Fluid viscosity, specic gravity too high
16. Worn bearing
17. Pump, motor or piping loose
WARNING
Hazardous voltage
can shock, burn or
cause death.

12
LIQUID END COMPONENTS
Item No. Description Material
1 Casing
2 Impeller Cast iron or Sil-brass*
3 Adapter
4 Wear ring (casing) Cast iron or bronze*
5** Wear ring (seal housing)
6 Impeller bolt
7 Impeller washer
8 Impeller key Steel
9 Seal housing o-ring (optional materials) BUNA-N/EPR/Viton
10 Mechanical seal Consult factory
11 Shaft sleeve AISI Type 300
stainless steel
12 Drain plug – ¼ or 3⁄8NPT
13 Hex head cap screw (casing to adapter) Zinc plated steel
14 Hex head cap screw (adapter to motor/frame)
15 Hex head cap screw (Adapter to seal housing)
 16 Lanternring Teon™
 17 Packing,5rings Teon™impregnated
18 Gland AISI 300SS
19 Shaft sleeve
20 Gland stud
21 Gland nut
22 Impeller nut (SAE only) 304 SS
22A Set screw,impeller nut (SAE only)
23 Grease feeder (oiler optional) Polycarbonate
REPAIR PARTS SERIES 3656/3756
AISI Type 300
stainless steel POWER END COMPONENTS (shown on next page)
Item No. Description Material
112 Ball bearing (outboard) Steel
122 Pump shaft
122A Pump shaft (SAE) AISI 4140 steel
 123 V-ring,deector BUNA-N
134 Bearing cover Cast iron
138 Lip seal (outboard) BUNA-N
139 Lip seal (inboard)
168 Ball bearing (inboard) Steel
 193 Greasetting(M&Lgroup)
327C Screw (cover to adapter) (SAE only) Zinc plated steel
340 Adapter/engine (SAE only) Cast iron
361 Retaining ring Steel
370C Hex head cap screw (frame to cover) Zinc plated steel
371C Hex head cap screw (adapter to frame)
(SAE only) NOT SHOWN Steel
399 Key, coupling
501N Cover/adapter (SAE only) Galvanized steel
SAE M & L
Replaces 6 & 7
4 6 7 8 2 5 9 10 3 11
13
12 1 14
AISI Type 300
stainless steel
LIQUID END COMPONENTS
Item No. Description Material
24 Grease gland Aluminum
25 Pipe plug Zinc plated steel
26 Lip seal Buna
* Lead free
** Item #5 supplied on S-group model 2½ x 3-7 (7½,10 and 15 HP) and
M-group (except 3 x 4-10).
16 17 18
20
19
21
Packed Box Arrangement
3
PrimeSafeArrangement(optional–M&Lgrouponly)
10 3
23
11
26
24
25
2222A

13
123 168 122 134
138
361 370C112
139 399
123 371L
134
501N
112193168
139
370C
340
327C
138
193
361
168
370C
193 134
138
112122193123
361
S-Group Power Frame M-Group Power Frame
168
139
370C
193 134
138
112122193123
361
122A
L-Group Power Frame SAE Power Frame
3656/3756 POWER FRAMES
399 399
399

Goulds is a registered trademark of Goulds Pumps, Inc. and is used under license.
© 2019 Xylem Inc. IM010 Revision Number 10 March 2019
Xylem Inc.
2881 East Bayard Street Ext., Suite A
Seneca Falls, NY 13148
Phone: [phone]
Fax: [phone]
www.xylem.com/goulds
COMMERCIAL WARRANTY
For goods sold to commercial buyers, Seller warrants the goods sold to Buyer hereunder (with the exception of membranes, seals, gaskets,
elastomer materials, coatings and other “wear parts” or consumables all of which are not warranted except as otherwise provided in the quotation or
sales form) will be (i) be built in accordance with the specications referred to in the quotation or sales form, if such specications are expressly made
a part of this Agreement, and (ii) free from defects in material and workmanship for a period of one (1) year from the date of installation or twelve
(12) months from the date of shipment (which date of shipment shall not be greater than eighteen (18) months after receipt of notice that the goods
are ready to ship), whichever shall occur rst, unless a longer period is specied in the product documentation (the “Warranty”).
Except as otherwise required by law, Seller shall, at its option and at no cost to Buyer, either repair or replace any product which fails to conform
with the Warranty provided Buyer gives written notice to Seller of any defects in material or workmanship within ten (10) days of the date when any
defects or non-conformance are rst manifest. Under either repair or replacement option, Seller shall not be obligated to remove or pay for the
removal of the defective product or install or pay for the installation of the replaced or repaired product and Buyer shall be responsible for all other
costs, including, but not limited to, service costs, shipping fees and expenses. Seller shall have sole discretion as to the method or means of repair
or replacement. Buyer’s failure to comply with Seller’s repair or replacement directions shall terminate Seller’s obligations under this Warranty and
render the Warranty void. Any parts repaired or replaced under the Warranty are warranted only for the balance of the warranty period on the parts
that were repaired or replaced. Seller shall have no warranty obligations to Buyer with respect to any product or parts of a product that have been:
(a) repaired by third parties other than Seller or without Seller’s written approval; (b) subject to misuse, misapplication, neglect, alteration, accident,
or physical damage; (c) used in a manner contrary to Seller’s instructions for installation, operation and maintenance; (d) damaged from ordinary
wear and tear, corrosion, or chemical attack; (e) damaged due to abnormal conditions, vibration, failure to properly prime, or operation without ow;
(f) damaged due to a defective power supply or improper electrical protection; or (g) damaged resulting from the use of accessory equipment not
sold or approved by Seller. In any case of products not manufactured by Seller, there is no warranty from Seller; however, Seller will extend to Buyer
any warranty received from Seller’s supplier of such products.
THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF ANY AND ALL OTHER EXPRESS OR IMPLIED WARRANTIES, GUARANTEES,
CONDITIONS OR TERMS OF WHATEVER NATURE RELATING TO THE GOODS PROVIDED HEREUNDER, INCLUDING WITHOUT LIMITATION ANY
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WHICH ARE HEREBY EXPRESSLY DISCLAIMED AND
EXCLUDED. EXCEPT AS OTHERWISE REQUIRED BY LAW, BUYER’S EXCLUSIVE REMEDY AND SELLER’S AGGREGATE LIABILITY FOR BREACH OF
ANY OF THE FOREGOING WARRANTIES ARE LIMITED TO REPAIRING OR REPLACING THE PRODUCT AND SHALL IN ALL CASES BE LIMITED
TO THE AMOUNT PAID BY THE BUYER FOR THE DEFECTIVE PRODUCT. IN NO EVENT SHALL SELLER BE LIABLE FOR ANY OTHER FORM OF
DAMAGES, WHETHER DIRECT, INDIRECT, LIQUIDATED, INCIDENTAL, CONSEQUENTIAL, PUNITIVE, EXEMPLARY OR SPECIAL DAMAGES,
INCLUDING BUT NOT LIMITED TO LOSS OF PROFIT, LOSS OF ANTICIPATED SAVINGS OR REVENUE, LOSS OF INCOME, LOSS OF BUSINESS, LOSS
OF PRODUCTION, LOSS OF OPPORTUNITY OR LOSS OF REPUTATION.

Modelos 3656 y 3756
INSTRUCCIONES DE INSTALACIÓN, FUNCIONAMIENTO Y MANTENIMIENTO
MANUAL DE INSTRUCCIÓN
IM010R010

16
ÍNDICE
TÓPICO PÁGINA
Instrucciones de seguridad..........................................16
Descripción y especicaciones.................................... 16
Datos de ingeniería ....................................................... 16
Instalación....................................................................... 16
Ubicación .................................................................... 16
Bombas de acoplamiento corto ..............................16
Bombas de montaje en bastidor .............................17
Bombas accionadas por motor SAE............................ 17
Alineación del acoplamiento ....................................... 20
Bombas de montaje en bastidor únicamente........ 20
Tuberías........................................................................... 20
Succión........................................................................ 20
Descarga ..................................................................... 21
Cableado y puesta a tierra............................................ 21
Rotación ..........................................................................21
Operación....................................................................... 21
Mantenimiento............................................................... 22
Desarmado.....................................................................22
Reensamblaje................................................................. 23
Instrucciones para la caja prensaestopas................... 24
Guía de identicación y resolución de problemas....25
Partes de repuesto.........................................................26
Garantía limitada............................................................ 28
INFORMACIÓN DEL PROPIETARIO
Por favor anote los siguientes datos y entregue el manual
al dueño de casa. Encontrará información sobre garantía
en la página 28.
Número de modelo:
Número de serie:
Comercio donde se adquirió:
Teléfono del comercio:
Fecha de compra: Fecha de instalación:

17
NEMA JM o JP estándar con montaje en cara C y extensión
del eje accionado por chaveta. Las unidades con acciona-
miento SAE se sujetan con pernos directamente a la cubierta
del volante del motor en los modelos de tamaño SAE 1, 2, 3,
4 y 5. Para los volantes de 6½, 7½, 8, 10, 11½ y 14 pulgadas,
hay disponibles elementos elastómeros para acoplamiento.
Las unidades para montaje en bastidor se pueden acoplar a
motores a través de un acoplamiento espaciador, o pueden
ser accionadas por correa.
DATOS DE INGENIERÍA
Temperatura máxima del líquido:
212ºF (100ºC) - sello o empaque estándar
250ºF (120ºC) - sello de alta temperatura opcional
Presión máxima de trabajo (dependiendo de la temperatura
del uido):
- conexiones NPT, 200 PSI (1379 kPa)
- conexiones con brida ANSI de 125 lbs., 200 PSI (1379 kPa)
Presión máxima de succión: 100 PSI (689.5 kPa)
Arranques por hora: 20, distribuidos uniformemente
Grupo Tamaño Succión Descarga
1½ x 2-6 (H) 2" NPT 1½" NPT
1 x 2-7 2" NPT 1" NPT
2½ x 3-7 3" NPT 2½" NPT
S3 x 4-7 4" Brida 3" Brida
1 x 2-8 2" NPT 1" NPT
1½ x 2-8 2" NPT 1½" NPT
2 x 2-5 2" NPT 2" NPT
2½ x 2½-5 2½" NPT 2½" NPT
LH 3 x 3-5 3" NPT 3" NPT
4 x 4-5 4" Brida 4" Brida
5 x 5-6 5" Brida 5" Brida
2½ x 3-8 3" NPT 2½" NPT
3 x 4-8 4" Brida 3" Brida
4 x 5-8 5" Brida 4" Brida
1½ x 2-10 2" NPT 1½" NPT
2½ x 3-10 3" Brida 2½" Brida
M3 x 4-10 4" Brida 3" Brida
4 x 6-10 6" Brida 4" Brida
2½ x 3-13 3" Brida 2½" Brida
3 x 4-13 4" Brida 3" Brida
4 x 6-13 6" Brida 4" Brida
6 x 8-13 8" Brida 6" Brida
L 8 x 10-13 10" Brida 8" Brida
4 x 6-16 6" Brida 4" Brida
INSTALACIÓN
UBICACIÓN
• Ubique la bomba tan cerca de la fuente de líquido como
resulte práctico y por debajo del nivel del líquido para
permitir el cebado automático.
• Deje suciente espacio para ventilación y tareas de
manteni-miento. Proteja la unidad de las inclemencias del
tiempo y daños causados por lluvias, inundaciones o
temperaturas bajo cero.
• Proteja la bomba y las cañerías de temperaturas bajo cero.
• Deje suciente espacio alrededor de la unidad para
ventilación y tareas de mantenimiento.
BOMBAS DE ACOPLAMIENTO CORTO
• Estas unidades se pueden instalar en forma horizontal,
inclinada o vertical con el motor sobre la bomba.
• Los pies del motor DEBEN abulonarse a una supercie re-
sistente (horizontal o vertical) que sea capaz de brindar un
soporte completo y rígido para la bomba y el motor. Para
las bombas del grupo L, los pies del adaptador del motor
también deben estar abulonados a la supercie de apoyo.
INSTRUCCIONES DE SEGURIDAD
PARA EVITAR LESIONES PERSONALES GRAVES O
FATALES Y SERIOS DAÑOS MATERIALES, LEA Y SIGA
TODAS LAS INSTRUCCIONES DE SEGURIDAD EN EL
MANUAL Y EN LA BOMBA.
Este es un SÍMBOLO DE ALERTA
relacionado con la seguridad. Cuando
encuentre este símbolo en la bomba o en el
manual, busque una de las siguientes pala-
bras de advertencia y esté alerta a las poten-
ciales lesiones personales o daños materiales.
Advierte sobre peligros que CAUSARÁN
lesiones personales graves, muerte o da-
ños materiales mayores.
Advierte sobre peligros que PUEDEN
causar lesiones personales graves, muerte
o daños materiales mayores.
Advierte sobre peligros que PUEDEN cau-
sar lesiones personales o daños materiales.
ATENCIÓN: INDICA QUE A CONTINUACIÓN
ENCONTRARÁ INSTRUCCIONES
ESPECIALES MUY IMPORTANTES,
LAS CUALES DEBE OBSERVAR.
ESTE MANUAL HA SIDO CREADO COMO UNA
GUÍA PARA LA INSTALACIÓN Y OPERACIÓN DE
LA UNIDAD. REPASE EN DETALLE TODAS LAS
INSTRUCCIONES Y ADVERTENCIAS ANTES DE
REALIZAR CUALQUIER TRABAJO EN ESTA BOMBA.
CONSERVE TODAS LAS CALCOMANÍAS DE
SEGURIDAD.
ATENCIÓN: INSPECCIONE LA UNIDAD E INFORME
INMEDIATAMENTE AL TRANSPORTISTA
DE CUALQUIER DAÑO QUE ENCUENTRE.
ESTA UNIDAD NO HA SIDO DISEÑADA
PARA OPERAR CON LÍQUIDOS PELI-
GROSOS O GASES INFLAMABLES.
Este puede exponerlo a químicos, incluido
el plomo, reconocidos por el estado de
California por provocar cáncer y defectos del nacimiento
u otros daños reproductivos. Para obtener más
información, acceda a: www.P65Warnings.ca.gov.
DESCRIPCIÓN Y ESPECIFICACIONES
Las bombas de la serie 3656/3756 son bombas centrí-
fugas de una etapa con succión en el extremo, para la
transferencia general de líquidos, aplicaciones de refuerzo,
riego y servicios generales de bombeo. Están disponibles
en tres materiales distintos: todo hierro, con accesorios de
bronce o todo bronce (grupo “S” únicamente).
Los impulsores de la bomba están completamente
encerrados, son accionados por chaveta y se mantienen
en posición con un perno y una arandela. Las carcasas
tienen diseño de voluta completa con anillos de desgaste
reemplazables.
Dependiendo del tamaño de la bomba, las conexiones
de succión y descarga son roscadas o con bridas. Los ejes
están protegidos por camisas de acero inoxidable.
Las unidades de acoplamiento corto tienen motores
PELIGRO
ADVERTENCIA
Presión
Peligrosa
PRECAUCIÓN
ADVERTENCIA
Los fluidos peligrosos
pueden causar
incendios, quemaduras
o la muerte.
ADVERTENCIA

18
Altura requerida por el sistema a tal capacidad. El punto
de capacidad de altura de operación debe encontrarse lo
más cerca posible a la mayor línea de rendimiento que se
muestra en la curva de desempeño, y debe encontrarse
por debajo de la línea de capacidad de altura indicada
como “máxima” RPM. La máxima velocidad de operación
RPM para la bomba se encuentra determinada por la anti-
güedad del cojinete o, en ciertos casos, por los límites de
presión de la bomba. Las aberturas de succión y descar-
ga tienen roscas NPT para tuberías estándar, o recubiertas
y taladradas según norma ANSI B16.1, clase 125 para
bridas estándar de acuerdo con lo indicado. La presión
máxima de trabajo para el hierro fundido clase 30, según
la norma ANSI B16.1, es 175 PSI.
Los motores de combustión interna son de velocidad
variable y de potencia variable. La salida de potencia
depende de la velocidad del motor (RPM) y se reducirá
al operar la altitud y/o los aumentos de la temperatura
aérea. Cuando se acciona la bomba a las RPM requeridas
para distribuir el agua en la tubería del sistema, el motor
debe operar dentro de los límites mínimos y máximos de
RPM establecidos por el fabricante del motor. Luego de la
reducción de la potencia nominal de todos los accesorios
del motor que consumen energía y el ajuste de la altitud
y la temperatura aérea del sitio de instalación, la salida
de potencia que suministra la potencia demandada por
la bomba no debe exceder la potencia nominal continua
del motor.
CALIBRACIÓN DEL GRUPO DE ENGRANAJES
CONDUCTORES (BHP)
La ecuación para obtener el BHP es: (Flujo x TDH) / 3960
x Rendimiento).
Nota: Para las unidades de combustión interna el cálculo
del BHP debe disminuirse de acuerdo con las siguientes
condiciones:
• 20% por servicio continuo
• 5% por accionamiento de ángulo recto
• 3% por cada 1.000 pies sobre el nivel del mar
• 1% por cada 10º F sobre 60º F.
CALIBRACIÓN DEL GRUPO DE ENGRANAJES
CONDUCTORES (TORQUE)
Además de la calibración de un motor por BHP, también
se requieren cálculos de torque para una correcta calibra-
ción. Generalmente, la potencia y el torque nominal no
mantienen la misma relación durante el rango utilizable
de un motor diesel (Figura 2). La ecuación para obtener el
torque (libras/pies) es (5250 x BHP) / RPM.
Figura 2: HP (◆) vs. Torque (■)
VERIFIQUE LA COINCIDENCIA DEL EXTREMO DE
LA BOMBA Y EL MOTOR
Tamaño de la abrazadera SAE
A las bombas accionadas por motor se les pueden colo-
car motores que poseen desde una cubierta del volante
estándar SAE 5 hasta una SAE 1.
En el caso de un motor nuevo, el proveedor del motor
puede suministrar el número de cubierta SAE.
En el caso de un motor existente, puede medir el oricio
• Para la operación vertical, el motor debe equiparse con
una cubierta antigoteo o protegerse de alguna otra
manera para evitar que entre líquido (lluvia, rociado,
condensación, etc.).
ATENCIÓN: NO INSTALE EL MOTOR POR DEBAJO DE
LA BOMBA. CUALQUIER PÉRDIDA O
CONDENSACIÓN AFECTARÁ AL MOTOR.
BOMBAS DE MONTAJE EN BASTIDOR
• Se DEBE proveer una supercie de base substancial para
evitar la distorsión o la tensión al ajustar los bulones
de la base de montaje. Se puede utilizar un montaje de
caucho para reducir el ruido y la vibración excesiva.
• Ajuste los pernos de sujeción del motor ANTES de
conectar la tubería a la bomba.
Figura 1
• Se recomienda enlechar la placa de base a un cimiento
con zapata sólida. Consulte la gura 1.
• Coloque la unidad en posición sobre cuñas ubicadas en
las cuatro puntas, dos debajo del centro aproximado del
motor accionador y dos debajo del centro aproximado de
la bomba. Ajuste las cuñas para nivelar la unidad. Nivele
o verique con plomada las conexiones de succión y
descarga.
• Asegúrese de que la placa de base no está distorsionada
y que la alineación nal del acoplamiento se puede efec-
tuar dentro de los límites de movimiento del motor, con la
ayuda de cuñas si fuera necesario.
• Ajuste los pernos de la base con la mano y construya una
presa alrededor de la base. Vierta la lechada debajo de la
placa de base asegurándose de llenar completamente las
áreas debajo de los pies del motor y de la bomba. Deje
endurecer la lechada por 48 horas antes de ajustar comple-
tamente los pernos de la base.
• Ajuste los bulones de sujeción de la bomba y el motor
antes de alinear el eje o conectar la cañería a la bomba.
• Deje endurecer la lechada por 48 horas antes de ajustar
los 4 pernos de la base.
BOMBAS ACCIONADAS POR MOTOR SAE
La caja de cojinetes del motor de accionamiento SAE está
diseñada para sujetarla directamente a la cubierta del motor
para los montajes SAE tamaño 1, 2, 3, 4 y 5. La extensión
del eje de la bomba es del tamaño apropiado para acopla-
mientos abulonados directamente al volante. Goulds Water
Systems ofrece acoplamientos opcionales para los volantes
de 6½, 7½, 8, 10 y 14 pulgadas. Si bien se pueden utilizar
otros acoplamientos de montaje en el volante, recomenda-
mos el uso de los acoplamientos de Goulds Water Systems
para asegurar la operación prolongada y sin inconvenientes
de la bomba.
REQUISITOS PARA UNA CORRECTA OPERACIÓN
Extremo de la bomba
Cuando se libere la capacidad requerida (GPM) a la tu-
bería del sistema, la bomba deberá añadir la cantidad de
Camisa
Arandela
Lengüeta
Extremo superior del
cimiento – límpielo y mójelo
Lechada
Cuñas o calzas de nivelación –
dejadas en posición
BaseAgujero para lechada
(1/4”)
(1/2” a 3/4”)
Tolerancia
de nivelación
Enlechado
terminado
Bastidor
de mader
a
600
500
400
300
200
100
0
1500 1600 1700 1800 1900 2000 2100 2200 2300
RPM
Torque (libras/pies)
180
178
176
174
172
170
168
166
164
162
160
HP

19
de la cubierta del volante y la circunferencia de los agu-
jeros de los pernos y luego compararlos con las dimen-
siones estándar de cubierta SAE detalladas en la Tabla 1,
para identicar el número de cubierta SAE.
Mida el oricio de la cubierta del volante (A) y la circun-
ferencia de los agujeros de los pernos (B), con la mayor
precisión posible, con una cinta métrica (a la medida más
cercana a 1/32 pulgada).
• Cuente la cantidad de oricios roscados en la cubierta
del volante (C). Pruebe los oricios roscados con un
perno, para determinar la serie de rosca.
• Compare las dimensiones tomadas (A), (B), (C) con la Ta-
bla 1 para determinar el número SAE de la cubierta del
volante, para asegurarse de que coincida con el número
SAE de su bomba.
Tamaño de la cubierta del volante SAE
1 2 3 4 5
A 201⁄8175⁄8161⁄8141⁄4123⁄8
B 207⁄8183⁄8167⁄815 131⁄8
CNº 12 12 12 12 8
Tamaño
7⁄16-14 3⁄8-16 3⁄8-16 3⁄8-16 3⁄8-16
INSTALACIÓN
• La bomba se puede instalar en posición horizontal,
con la descarga girada hacia cualquier posición permi-
tida por el patrón de los pernos de la carcasa (13). Se
recomienda que la descarga se encuentre en posición
horizontal, por encima de la succión.
• En todas las bombas la carcasa debe estar sostenida
por un soporte rígido sujeto al cimiento o base de la
unidad.
• Para las bombas del grupo M, se recomienda que dicho
soporte se sujete con 2 o más pernos de la carcasa (13)
al anillo adaptador del motor. Probablemente se re-
quieran pernos más largos para el grosor adicional del
soporte. Utilice pernos SAE grado 5, torsionados según
se indica en este manual.
• Para las bombas del grupo L, se recomienda que la
bomba se apoye debajo de los dos pies fundidos en el
adaptador del motor (3). Dichos pies deben sujetarse
con pernos al soporte.
MONTAJE DE LA BOMBA SOBRE EL MOTOR
(ACOPLAMIENTO RANURADO)
Preparación para el montaje de la bomba sobre el
motor
• Limpie la supercie y controle que coincidan la cubierta
del volante y el volante según sea necesario para quitar
toda la grasa, suciedad o polvo (y todos los rastros de
antioxidante), que interferirían en la instalación de la
bomba y/o impedirían la correcta alineación. Si el volante
se coloca mediante un cojinete piloto para un eje de
transmisión, quítelo y deséchelo. No se necesita el coji-
nete piloto para la instalación del extremo de la bomba, y
puede interferir con el eje de la bomba.
• Examine detenidamente la ranura del eje. Utilice una
lima, si es necesario, para quitar toda la rebaba que impe-
diría el libre desplazamiento del acoplamiento sobre el
eje.
• Lubrique moderadamente la ranura del eje de la bomba
con grasa liviana. No lubrique el eje recto con chaveta.
• Deslice el acoplamiento sobre el eje hasta que se deten-
ga contra el eje (remítase a la página 5 para la instalación
del eje recto).
• Mida la distancia existente desde el lado del motor del
anillo adaptador de acoplamiento del volante hasta la
supercie de montaje de la abrazadera de la bomba.
Remítase a la Figura 4 debajo, Dimensión “A”.
• Luego, mida la profundidad existente desde la supercie
de la cubierta del volante sobre el motor hasta la super-
cie del volante contra la cual se colocará con pernos el
acoplamiento. Remítase a la Figura 4 debajo, Dimensión
“B”.
• La medición de la bomba debe ser inferior a la medición
del motor porque sino la interferencia axial producirá
una fuerza de empuje sobre los cojinetes de cigüeñal del
motor. Dicho de manera simple, la Dimensión “A” debe
ser inferior a la Dimensión “B”.
ACOPLAMIENTO DEL VOLANTE
• El acoplamiento del volante transmite la potencia desde
el volante del motor hasta el eje de la bomba. El máximo
de potencia que un acoplamiento puede manejar sin
peligros se demuestra en un número nominal, “R”, que se
detalla en las tablas de dimensiones de acoplamiento.
Figura 3
Tabla 1
Dimensiones
de la cubierta
del volante
MOTOR
Figura 4 Figura 5
Instalación
alternativa
NOTA: Cuando el acoplamiento se encuentre correctamente montado,el
buje no llegará al fondo en las ranuras del eje.Si tocara fondo,retraiga el
acoplamiento en el eje según se muestra, para ganar espacio.
Motor
Abrazadera
de la bomba
Abrazadera
de la bomba
La dimensión “A” DEBE ser inferior a
la dimensión “B”.
Imposible – (A es
mayor que B) Posible – (Aes
menor que B)
Controle la distancia antes
de operar la bomba
Motor
Abrazadera
de la bomba
Instalación
preferida

20
• Al escoger un acoplamiento del volante para una bom-
ba y un motor, primero determine la potencia nominal
que la bomba demandará. En la curva de desempe-
ño de la bomba, obtenga los valores de RPM y BHP
necesarios para producir el punto de aplicación de la
capacidad de altura.
• Divida el BHP por EL RPM, luego multiplique el resulta-
do por 100. El resultado será el número de demanda de
la bomba. Por ejemplo, una 20BFSAE1AO puede liberar
800 GPM a 270 pies de Altura total mientras funciona a
1800 RPM. La potencia requerida por la bomba será de
75 BHP. El número de demanda será: (75 / 1800) x 100
= 4.16
• Luego, seleccione un acoplamiento que pueda trans-
mitir sin peligros la potencia y que se adecuará a las
dimensiones del volante. Para que un acoplamiento
resulte adecuado debe poseer un número nominal “R”
MAYOR QUE el número de demanda de la bomba. En
el ejemplo anterior, el mínimo número “R” de acopla-
miento sería 5.
• La compatibilidad de torsión del motor, la bomba y el
acoplamiento es responsabilidad de quien realiza el
montaje. Goulds Water Systems suministrará los datos
necesarios sobre la bomba y el acoplamiento para ser
utilizados por quien realiza el montaje en una análisis
torsional.
NOTA: Si el volante se coloca con un cojinete piloto pre-
sionado en un oricio en el centro, quítelo para evitar la
interferencia con el eje de la bomba.
VOLANTE PARA EMBRAGUES DE SOBRECENTRO
DE TIPO INDUSTRIAL
• La Figura 3 muestra la apariencia ahuecada de los
volantes fabricados para ser utilizados en monta-
jes de despegue propulsados con embragues de
sobrecentro.
• Dichos volantes poseerán un oricio empotrado
mecanizado en la supercie, y un conjunto de agu-
jeros de colada, que serán utilizados para conectar
el acoplamiento al volante. Las dimensiones se
encuentran determinadas por el estándar SAE y se
detallan en las Tabla 1A y 1B, Figura 3. El “tamaño
del embrague” que se muestra en la tabla es el
diámetro nominal del recubrimiento del embra-
gue para Embragues de sobrecentro con anillo de
accionamiento.
OTROS VOLANTES
• Ciertos motores están equipados con volantes
especialmente mecanizados para acoplarse a
otros tipos de maquinaria (generadores eléctri-
cos, convertidores de torque, etc.) y necesitan de
acoplamientos de volante que no sean estándar.
Estos pueden adquirirse por medio de vendedores
o proveedores.
Figura 6
Tabla IA –
Rango amplio de RPM, Buje montado elastomérico –
Eje ranurado
Tamaño Dimensiones del volante Acoplamiento del volante (Ranurado)
del D diám.de
emb- Cant. Tamaño E BC F G H R* Nº del la ranura
rague (UNC) Catálago del eje
6½" 6 5⁄16-18 8½ OD 7.88 3.94 1.19 1.69 7 A00569C 1 1½"10T
7½" 8 5⁄16-18 9½"OD 8.75 3.69 1.19 1.69 7 A00569C2 1½"10T
8" 6 3⁄8-16 103⁄8"OD 9.62 4.81 2.44 2.94 7 A00569C3 1½"10T
10" 8 3⁄8-16 123⁄8" OD 11.62 4.47 2.13 2.75 7 A00569C 4 1½"10T
10" 8 3⁄8-16 123⁄8" OD 11.62 4.47 2.13 2.75 9 A00569C 6 1½"10T
11½" 8 3⁄8-16 137⁄8" OD 13.12 5.06 1.56 2.69 7 A00569C 5 1½"10T
11½" 8 3⁄8-16 137⁄8" OD 13.12 5.06 1.56 2.69 9 A00569C 7 1½"10T
14" 8 ½-13 183⁄8"OD 17.25 6.63 1.00 2.13 9 A00569C8 1½"10T
OD = Diámetro exterior
*R = Máxima potencia nominal del acoplamiento
Potencia nominal del acoplamiento = (Potencia Nominal x 100) / RPM nominal
Table IB –
Rango amplio de RPM, Buje montado elastomérico –
Eje recto
Tamaño Dimensiones del volante Acoplamiento del volante (Ranurado)
del D diám.de
emb- Cant. Tamaño E BC F G H R* Nº del la ranura
rague (UNC) Catálago del eje
6½" 6 5⁄16-18 8½ OD 7.88 3.94 1.19 1.69 2.28 CD616
3.51 CD625
7½" 8 5⁄16-18 9½"OD 8.75 3.69 1.19 1.69 2.28 CD716
3.51 CD725
8" 6
3⁄8-16 103⁄8"OD 9.62 4.81 2.44 2.94 2.28 CD816
3.51 CD825
2.28 CD1016
3.51 CD1025
10" 8 3⁄8-16 123⁄8" OD 11.62 4.47 2.13 2.75 5.71 CD1030
8.57 CD1050
11.23 CD1080
2.28 CD1116
3.51 CD1125
5.71 CD1130
11½" 8 3⁄8-16 137⁄8" OD 13.12 5.06 1.56 2.69 8.57 CD1150
11.23 CD1180
12.62 CD1190
16.85 CD11110H
2.28 CD1416
3.51 CD1425
5.71 CD1430
14" 8 3⁄8-16 183⁄8" OD 17.25 6.63 1.00 2.13 8.57 CD1450
11.23 CD1480
12.62 CD1490
16.85 CD14110H
OD = Diámetro exterior
Dimensiones en pulgadas
*R = Máxima potencia nominal del acoplamiento
Potencia nominal del acoplamiento = (Potencia Nominal x 100) / RPM nominal
• Para los acoplamientos Goulds Water Systems con
chaveta de eje recto – Asegúrese de que el tornillo de
1.625-
1.624Ø
Ranurade
3⁄8x3⁄16
Acoplamiento
del volante
Motor
Volantes para embrague de
sobrecentro de tipo industrial
-10T
(número de ranura)
Diámetro
de la ranura