Carver GVC Series User manual

(GVC) I-460 Rev. 02
(GVT) I-470 Rev. 02

SERVICE RECORD PAGE
Service No. ________________ Size and Type ______________ Make ________________________
Cust. Order No. ________________________ Date Installed __________________________________
Installation Date Location Application
PUMP RATING
Capacity (GPM) __________________________ Total Head (ft) _______________________________
Suction Pressure _________________________ Speed (RPM) ________________________________
Liquid __________________________________ Temperature ________________________________
Specific Gravity __________________________ Viscosity ____________________________________
Impeller Diameter (inches) ______________________________________________________________
PUMP MATERIALS
Casings ___________________ Impeller ___________________ Diffuser _______________________
Shaft ____________________________________ Wear Ring ________________________________
O-rings _______________________________ Bearing Frame _______________________________
Mechanical Seal, Suction End (Low Pressure) ______________________________________________
Mechanical Seal, discharge End (High Pressure) ____________________________________________
DRIVER DATA
Motor _________________ Make ________________________ Serial No. ______________________
Type __________________ Frame _______________________ AC or DC ______________________
HP ____________________ RPM ________________________ Volts _________________________
Phase _________________ Cycles _______________________

NOTES ON INSPECTION AND REPAIRS
INSPECTION DATE REPAIR TIME REPAIRS COST REMARKS

i
TABLE OF CONTENTS
LOCATION/DESCRIPTION PAGE
•SERVICE RECORD PAGE ...............FRONT
•NOTES ON INSPECTION AND
REPAIRS...........................................FRONT
I. GENERAL INFORMATION .........1
A. Preface....................................1
B. Pump Identification.................1
C. Parts Inventory Guide.............1
D. Parts Ordering.........................1
E. Safety Precautions..................1
II. INSPECTION AND STORAGE ...2
A. Inspection Upon Arrival...........2
B. Storage of Pump.....................2
III. INSTALLATION...........................4
IV. ALIGNMENT................................4
V. OPERATION................................4
A. Prestart Cautions....................4
B. Starting the Pump...................4
C. Stopping the Pump .................4
VI. MAINTENANCE...........................5
A. Field Inspection.......................5
B. Stuffing Box.............................5
C. Bearing Temperature..............5
D. Bearing Lubrication.................5
VII. TROUBLESHOOTING.................6
VIII. SERVICE AND REPAIR..............9
A. Disassembly and Assembly....9
B. Parts Inspection......................14
LOCATION/DESCRIPTION PAGE
C. Adjusting Impeller Clearance
on Pump Equipped with
Semi-Open Impeller................16
D. Replacement of Optional
Wear Ring on Pump Equipped
with Enclosed Impeller............16
IX. PARTS LIST AND FIGURES......17
LIST OF TABLES
TABLE TITLE PAGE
A. Recommended Torque Values.....5
1. Troubleshooting ............................7
2. Throttle Bushing Dimensions........15
3. Enclosed Impeller Clearance........15
4. Impeller/Wear Ring Matching
Materials........................................16
5. Recommended Spare Parts..........17
6. Pump Parts List for GVC 1520 and
GVC 1530/1540 ............................18
7. Pump Parts List for GVT 1520 and
GVT 1530/1540.............................18
LIST OF ILLUSTRATIONS
FIGURE TITLE PAGE
A. Ordering Codes.............................3
1. GVC (1520 Frame)
Sectional Drawing.........................19
2. GVC (1530 Frame)
Sectional Drawing.........................20
3. GVC (1540 Frame)
Sectional Drawing.........................21
4. GVT (1520 Frame)
Sectional Drawing.........................22
5. GVT (1530 Frame)
Sectional Drawing.........................23
6. GVT (1540 Frame)
Sectional Drawing.........................24
7. Optional Wear Ring.......................25

1
I. GENERAL INFORMATION
A. PREFACE. General vertical cantilevered
(GVC) pumps are designed for industrial service. All
wetted surfaces are available in all iron, stainless
fitted, and stainless steel construction. The general
vertical top pullout (GVT) design provides fast, easy
access to all working parts without disconnecting
pipes.
B. PUMP IDENTIFICATION. The type of pump,
pump size, operating data, and serial number are all
stamped on the nameplate attached to the pump.
Pump specifications should be recorded upon receipt
of the pumping unit. Record all necessary information
on the pump service record page and inspection and
repair record provided at the front of this manual.
When ordering spare parts, check to make sure that
the serial number and model number of the pump are
correct. When ordering a pump, refer to Figure A,
Ordering Codes. This information must be included in
all correspondence regarding the unit. This will ensure
that the correct pump and/or parts are ordered in a
timely manner.
C. PARTS INVENTORY GUIDE. To avoid
unnecessary delays during maintenance of pump,
spare parts should be readily available for normal
service. Most matters can be handled with proper
usage of this manual. For every one to three pumps,
stock one spare set consisting of items listed in Table
5, Recommended Spare Parts. Part numbers
correspond to the drawings (figures 1 through 7)
found at the back of this manual.
A nameplate is attached to each pump. The data on
the nameplate should be recorded and filed for easy
reference. Nameplate data should be furnished to
Carver Pump Company or its representative when
ordering spare parts or requesting information.
D. PARTS ORDERING. Carver Pump Company
strives to provide prompt, accurate service. To ensure
quality customer service, please provide the following
information:
•Serial number of pump (located on
nameplate)
•Part name (refer to Table 6 and Table 7)
•Item number (refer to Table 6, Table 7,
and figures 1 through 7)
•Quantity of parts needed
Carver may ship an interchangeable part that is not
identical in appearance or symbol. This is done only if
the part has been improved. Examine the parts
carefully on receipt before calling the factory or a
company representative. Never return parts to the
factory without authorization from Carver Pump
Company.
If an impeller is ordered, specify diameter across
blade tips. Check to make sure diameter was NOT
trimmed further than diameter shown on Carver Pump
Company records.
If a motor/motor parts are ordered, specify the name
of the manufacturer and all other data found on the
driver nameplate.
E. SAFETY PRECUATIONS. This manual
contains descriptions and instructions, which are the
result of carefully conducted engineering and
research efforts. The manual is written with the intent
to provide instructions for the safe and efficient
installation, operation, and maintenance of the pump.
Failure or neglect to properly install, operate, or
maintain the pump may result in personal injury,
property damage, or unnecessary damage to the
pump and/or parts.
Variations exist in both the equipment used with these
pumps and in particular, installation of the pump and
driver. Therefore, specific operating instructions are
not within the scope of this manual. This manual
contains general rules for installation, operation, and
maintenance of the pump.
Observe and understand all caution or danger tags
attached to the equipment. Observe and understand
all cautions and warnings included in this manual.
The following general safety precautions do not relate
to any specific procedure within this manual but are
pertinent to providing a safe working environment for
personnel.
CAUTION
Various federal, state and local laws and the
regulations concerning OSHA affect
installation, use, and operation of pumping
equipment. Compliance with such laws
relating to the proper installation and safe
operation of pumping equipment is the
responsibility of the equipment owner and all
necessary steps should be taken by the
owner to assure compliance with such laws
before operating the equipment.
PUMP
1. Hydro suction case separately if unit
hydro is greater than 620 PSIG.
2. Isolate pump for system hydro.
3. Do NOT exceed maximum suction
pressure of 415 PSIG on suction case.
4. Do NOT exceed maximum discharge
pressure of 1200 PSIG on discharge
case.
DRIVER
5. Prior to working on pump or driver,
ensure all switches and circuit breakers
have been locked in the open (off)
position and tagged, “Out of Service.”
6. All circuits NOT known to be dead must
be considered live at all times.
7. Do NOT wear loose or torn clothing
around rotating machines. Do NOT wear
jewelry or watches around rotating
machines.
8. While working near electricity, do NOT
use metal rules, flashlights, metallic

2
pencils, or any other objects having
exposed conducting material.
9. Ensure you are NOT grounded while
adjusting electrical equipment or using
measuring equipment.
10. In general, use only one hand when
servicing live electrical equipment.
11. De-energize all electrical equipment
before connecting or disconnecting
meters or test leads.
12. When connecting a meter to terminals
for measurement, use a range higher
than the expected voltage.
13. Check to make sure the frame of the
driver and starter panel are securely
grounded before operating pumping unit
or performing any tests or
measurements.
14. If a test meter is held or adjusted while
voltage is applied, ground case of meter
before starting measurement. Do NOT
touch live equipment while holding
meter. Some moving vane-type meters
should not be grounded nor held during
measurements.
15. Do NOT use test equipment known to
be damaged or in poor condition.
16. Reference Table A, Torque Values, to
avoid equipment damage and injury to
personnel.
II. INSPECTION AND STORAGE
A. INSPECTION UPON ARRIVAL. Upon
receipt of the shipment, check for missing or
damaged items. Unpack and inspect the pump,
driver assemblies, and individual parts. Carefully
inspect all boxes and packing material for loose
parts before discarding. Immediately report any
missing parts or damage incurred during
shipment to the factory and to the transportation
company. File your “damaged and/or lost in
shipment” claim with the carrier.
NOTE
The pump and equipment, as shipped from
Carver Pump Company, have appropriate
protection for short-term storage. If the
equipment is NOT immediately installed and
operated, store the equipment in a covered,
clean, dry, well-ventilated location, free from
vibrations, moisture, and rapid or wide
variations in temperature.
B. STORAGE OF PUMP. If the equipment is
NOT immediately installed and operated, Carver
Pump Company recommends rotating each shaft
several revolutions at least once every two weeks to
prevent flat spots on ball bearings.
Consider a unit to be in storage when any of the
following situations occur:
•The pump has been delivered to the job site and
is waiting to be installed.
•The pump has been installed but operation is
delayed pending completion of construction.
•There are long (30 days or more) periods
between operating cycles.
•The plant (or department) is shut down for
periods of longer than 30 days.
CAUTION
A pump, which is made of cast or ductile iron
that sits in extreme heat, high humidity, or
full or partially full water over 30 days will
rust and will most likely seize. If the pump
rusts and/or seizes, a complete overhaul and
repair may be necessary to refurbish the
pump.
Storage requirements vary depending on the
length of storage, the climatic environment,
and the equipment. For storage periods of
three months or longer, contact a
representative from Carver Pump Company
for specific instructions. Improper storage will
damage the equipment and will require non-
warranty restoration and/or non-warranty
product failures. Refer to Section VIII,
Service and Repair, for pump disassembly
and assembly procedures. When
disassembling the pump, replace and repair
rusted parts, as necessary.
NOTE
If the customer anticipates the
pump/equipment will be subject to an
extended period of storage after installation,
(for example, a unit used for seasonal
operation), contact a representative from
Carver Pump Company. If this is the case,
Carver will provide specific instructions for
the equipment during the extended period of
storage. In general, if a pump is to be shut
down for an extended period, the following
steps are recommended:
1. Shut down the pumping unit in
accordance with the operating
procedures outlined throughout this
manual.
2. Shut off system suction and discharge
valves.
3. Drain the unit.
4. Fill unit with mineral oil or suitable non-
corrosive protectant that is compatible
with the system.
5. Provide pump and motor with a
protective cover.

3
The following Ordering Code defines the new
GV Series pump and pump/motor and top plate
arrangements. When quoting or ordering a GV
pump, this Ordering Code must be used. This
Ordering Code enables Carver Pump Company
to accept orders quickly, assuring timely and
correct manufacture of the desired pump.
EXAMPLE
* Casing Nozzle and Impeller Sizes containing codes BA through BF and CA through CG have semi-open impellers. Casing Nozzle
and Impeller Sizes containing codes DA through DE and EA through EG have closed impellers.
Figure A. Ordering Codes
---
Pump Series Couplin
g
, Motor Mountin
g
Bracket and Motor
GV - General Vertical A- Standard couplin
g
, ODP motor, standard efficiency
B- Standard couplin
g
, ODP motor, Hostile Duty
Mountin
g
Style C- Standard couplin
g
, TEFC motor, standard efficiency
C - Cantilever desi
g
nD- Standard couplin
g
, TEFC motor, Hostile Duty
T - Top pull out desi
g
nE- Standard couplin
g
, X-P motor, standard efficiency
S - Sump desi
g
nX - Special couplin
g
, motor enclosure or motor speed
Z- No couplin
g
or motor - bare pump only
Casin
g
Nozzle and Impeller Sizes
BA - 1 1/4 x 1 x 7 DA - 2 x 1 x 11 Motor Ratin
g
(when required)
BB - 1 1/2 x 1 1/4 x 7 DB - 4 x 2 x 11 A- 1.5 HP @ 1750 RPM K- 15 HP @ 1750 RPM V- 75 HP @ 1750 RPM
BC - 2 1/2 x 2 x 7 DC - 4 x 3 x 11 B- 2.0 HP @ 1750 RPM M- 15 HP @ 3500 RPM W- 100 HP @ 1750 RPM
BD - 3 x 2 1/2 x 7 DD - 5 x 4 x 11 C- 3.0 HP @ 1750 RPM N- 20 HP @ 1750 RPM
BE - 4 x 3 x 7 DE - 8 x 6 x 11 D - 5.0 HP @ 1750 RPM P- 20 HP @ 3500 RPM X - Special or over 100 HP
BF - 5 x 4 x 7 E- 5.0 HP @ 3500 RPM
Q
- 25 HP @ 1750 RPM
EA - 2 1/2 x 1 1/2 x 13 F- 7.5 HP @ 1750 RPM R- 30 HP @ 1750 RPM Z- No motor - bare pump
CA - 1 1/2 x 1 1/4 x 10 EB - 2 1/2 x 2 x 13 G- 7.5 HP @ 3500 RPM S- 40 HP @ 1750 RPM
CB - 2 x 1 1/2 x 10 EC - 3 x 2 1/2 x 13 H- 10 HP @ 1750 RPM T- 50 HP @ 1750 RPM
CC - 2 1/2 x 2 x 10 ED - 4 x 3 x 13 J- 10 HP @ 3500 RPM U- 60 HP @ 1750 RPM
CD - 3 x 2 1/2 x 10 EE - 5 x 4 x 13
CE - 4 x 3 x 10 EF - 6 x 5 x 13
CF - 5 x 4 x 10 EG - 8 x 6 x 13 (GVC & T only) Top Plate and Dischar
g
e Pipe Arran
g
ement
CG - 6 x 5 x 10 A- Small steel top plate (no dischar
g
e pipe), no underliner (GVC & T only)
B- Small steel top plate (no dischar
g
e pipe), 316 SS underliner (GVC & T only)
C- Small 316 SS top plate (no dischar
g
e pipe), no underliner
Basic Materials and Construction
A -
A
ll cast iron construction D- L
g
. steel plate, no underliner, standard steel dischar
g
e pipe (standard for GVS)
B - 316 stainless steel fitted cast iron construction E- L
g
. steel plate, no underliner, oversized steel dischar
g
e pipe (GVC & T only)
C -
A
ll 316 stainless steel construction for major components F- L
g
. steel plate, no underliner, dbl. oversized steel dischar
g
e pipe (GVC & T only)
X- Special G- L
g
. steel plate, 316 SS underliner, standard size steel dischar
g
e pipe
H- L
g
. steel plate, 316 SS underliner, oversized steel dischar
g
e GVC & T only)
J- L
g
. steel plate, 316 SS underliner, dbl. oversized steel dischar
g
e (GVC & T only)
K- L
g
. steel plate, no underliner, standard size 316 SS dischar
g
e pipe
Column Depth (1.0 and 2.0 ft for GVC & T only) L - L
g
. steel plate, no underliner, oversized 316 SS dischar
g
e (GVC & T only)
A - 1.0 ft (GVC & T) L - 11.0 ft (GVS only) M- L
g
. steel plate, no underliner, dbl. oversized 316 SS dischar
g
e (GVC & T only)
B - 2.0 ft (GVC & T) M - 12.0 ft (GVS only)
N - 13.0 ft (GVS only) N- L
g
. steel plate, 316 SS underliner, standard size 316 SS dischar
g
e pipe
C - 4.0 ft (GVS only) P - 14.0 ft (GVS only) P- L
g
. steel plate, 316 SS underliner, oversized 316 SS dischar
g
e (GVC & T only)
D - 5.0 ft (GVS only)
Q
- 15.0 ft (GVS only)
Q
- L
g
. steel plate, 316 SS underliner, dbl. o'sized 316 SS dischar
g
e (GVC & T only)
E - 6.0 ft (GVS only) R - 16.0 ft (GVS only)
F - 7.0 ft (GVS only) S - 17.0 ft (GVS only) R- Lar
g
e 316 SS top plate, standard size steel dischar
g
e pipe
G - 8.0 ft (GVS only) T - 18.0 ft (GVS only) S- Lar
g
e 316 SS top plate, oversized steel dischar
g
e (GVC & T only)
J - 9.0 ft (GVS only) U - 19.0 ft (GVS only) T- Lar
g
e 316 SS top plate, double oversized steel dischar
g
e (GVC & T only)
K - 10.0 ft (GVS only) V - 20.0 ft (GVS only) U- Lar
g
e 316 SS top plate, standard size 316 SS dischar
g
e pipe
V- Lar
g
e 316 SS top plate, oversized 316 SS dischar
g
e (GVC and GVT only)
Throttle Bushin
g
, Lineshaft Bearin
g
and Flush Lines W - Lar
g
e 316 SS top plate, double oversized 316 SS dischar
g
e (GVC & T only)
A- Teflon bushin
g
(standard for GVC & T)
B- 17-4 PH bushin
g
, 416 SS shaft sleeve (GVC & T only) X- Special
C- Bronze lineshaft bearin
g
,
g
reased for life (standard for GVS)Z- No top plate or dischar
g
e pipe - bare pump only (standard for GVC & T)
D- Bronze lineshaft bearin
g
, externally flushed (GVS only)
E- Carbon lineshaft bearin
g
, externally flushed (GVS only)
X- Special
Inlet Pipe and Strainer
A - Zinc plated steel strainer with steel tailpipe
B - 304 SS strainer with 316 SS tailpipe
X- Special strainer and/or tailpipe
Z - No strainer or tailpipe (standard)
Z Z ZB A ZG V B E AC

4
III. INSTALLATION.
Skilled personnel should install the pump in
accordance with engineering standards. Faulty
installation will result in operating troubles and
premature wear of parts.
The pump and driver should be easily accessed with
enough headroom to perform periodic inspection and
maintenance. The pump should always be
submerged enough to prevent vortexes from forming,
which might allow air to enter the suction.
When pump is supplied with coupling, motor, and
baseplate, the complete set is assembled at Carver
Pump Company. After ascertaining that the unit has
suffered no damage in transit, one may install the
pumping unit. Proceed as follows:
1. Make sure the mounting surface is level.
Attach the base to the mounting surface.
Check that pump rotates freely.
CAUTION
Pipe strain will cause wear and/or damage to
parts.
2. Connect discharge piping. Extreme care
should be taken when connecting new piping
lines to be sure that no foreign matter such
as dirt, chips, tools, etc., is in the piping,
tank, or return piping as the debris will be
drawn into the pump and cause excessive
damage. Any debris caught in the pump
passageways will throw the pumping unit out
of balance.
3. Connect any necessary auxiliary piping and
gauge lines.
4. Since the pumping unit is shipped with
bearings packed, initial greasing will not be
necessary unless pumping unit has been in
storage for an extended period of time (refer
to section II).
5. Turn pump and motor shafts by hand to be
sure they rotate freely.
6. Connect wiring to motor. Due to high voltage
required to operate the pumping unit,
personnel working with the equipment
should be familiar with electrical safety
practices and modern methods of
resuscitation.
7. Connect electrical power supply to motor.
8. Open system valves.
IV. ALIGNMENT.
A flexible coupling connects the pump and motor.
The motor bracket aligns the pump and motor. No
further alignment is necessary.
V. OPERATION.
A. PRESTART CAUTIONS.
1. Before starting or operating the pump, read
this entire manual, especially the following
instructions.
2. Before starting the pump, rotate shaft by
hand to assure all moving parts are free.
3. Before starting the pump, install closed
guards around all exposed rotating parts.
4. Observe all caution or danger tags attached
to the equipment.
5. Never run pump dry. Dry running may result
in pump seizure.
6. If excessive vibration or noise occurs during
operation, shut the pump down and consult a
Carver representative.
7. Use of a check valve in discharge piping is
recommended if there is a high volume of
reverse flow.
8. Check level in tank to see that the pump is
submerged in fluid.
B. STARTING THE PUMP. The pumping unit will
operate without operator intervention once system
valves have been adjusted to the specified pumping
conditions. The casing of the pump will be submerged
in the fluid being pumped, thus rendering it self-
priming. Proceed with operation as follows:
1. Make sure no one is working on the pumping
unit.
2. If the pumping unit has been idle for a period
of time, make sure unit is firmly attached to
its foundation.
3. Open valves to pressure gauges in system.
CAUTION
Check level of liquid in tank to be sure
casing is under liquid level.
4. Jog starter switch on motor to check
direction of rotation. Direction of rotation is
clockwise from fan end of motor.
5. Partially open discharge valve.
6. Start the pumping unit in accordance with
the directions on the electrical power supply.
7. Slowly adjust discharge valve to operating
condition required.
8. Pumping unit is now in full operation.
C. STOPPING THE PUMP. To stop the pump,
use the following process:
1. If pump is being stopped for overhaul, slowly
close the discharge valve. Otherwise leave
discharge valve set at condition.
2. Stop the pumping unit in accordance with the
directions on the electrical power supply.
3. If the pump is being stopped for overhaul,
close pressure gauge valves.

5
4. The pumping unit is now in the off position.
VI. MAINTENANCE.
Generally, the pump does not require continuous
supervision. Occasional visual checks are
recommended. Data should be recorded for each
pump to keep track of maintenance, which has been
performed and note operational problems. A pump
service record page is provided for this purpose in the
front matter of this manual.
Before disassembly/assembly, review Table A,
Torque Values to avoid equipment damage and injury
to personnel.
Table A. Recommended Torque Values (ft-lbs)
Bolt
Size Material
Composite Steel (or
otherwise
noted)
316
Stainless
Steel
¼”-20 5 5 7
5/16”-18 11 11 12
3/8”-16 18 18 21
½”-13 33 39 45
5/8”-11 54 83 97
¾”-10 80 105 132
7/8”-9 109 160 203
1”-8 144 236 300
A. FIELD INSPECTION. Shutdown is not
required. Perform field inspection at regular intervals
and cover the following procedures:
1. Check and record the suction and discharge
pressures to establish differential head. It
should conform to the pump nameplate.
2. Check and record the power input and speed
of the driver.
3. Check and record pumping temperatures.
4. Check pump for quiet running.
B. STUFFING BOX. The stuffing box is equipped
with a throttle bushing which requires no regular
maintenance. The inside diameter of the throttle
bushing will increase with wear. The throttle bushing
should be inspected after pump disassembly. The
throttle bushing requires replacement if the inside
diameter is more than 0.020 inch out of round.
C. BEARING TEMPERATURE. Bearing
temperature should be monitored periodically. Normal
operating temperatures are 120 degrees F to 160
degrees F, depending on the ambient temperature.
Bearings may appear to run hot when pump is first
started. This is caused by the shaft seal, not the
bearing. When the seal is seated, temperature should
drop to normal.
Check bearing temperature by placing a pyrometer
against the bearing frame while pump is running. A
temperature rise above 180 degrees F indicates
possible damage that requires checking. The most
common cause of high bearing temperatures is
overgreased bearings.
D. BEARING LUBRICATION. Lubrication
frequency depends on operating conditions. Normal
duty calls for relubrication every 1000 hours of
operation. Bearings are lubricated at Carver Pump
Company with Amoco Rykon Premium Grease No.
2EP, non-soap, polyurea thickened grease with a
drop point of 450 degrees F. This grease was
selected due to its suitability to extreme pressures
and its high temperature stability. Never mix greases
with differing properties.
Polyurea base greases are NOT compatible with
lithium or soda soap base greases. Therefore, the
type of grease added should not vary. However, if it is
necessary to change grease types, the bearings,
bearing frame, and bearing cap/cartridge should be
thoroughly cleaned and flushed with suitable solvent
to remove all traces of old grease. Disassemble
pump, remove shaft and bearings from bearing frame,
and follow these procedures:
1. Place bearings, bearing frame, and
bearing cap/cartridge in a wire or mesh
basket and suspend the basket in a light
mineral solvent. Allow it to soak,
preferably overnight.
2. After soaking and cleaning, the bearings,
bearing frame, and bearing cap/cartridge
should be rinsed in a clean, light mineral
solvent and agitated vigorously to remove all
loosened hard grease and dirt.
3. Dip bearings in clean, light oil and spin by
hand to determine that all foreign matter has
been removed.
4. After cleaning, repack bearings half full on
both sides with a good quality ball bearing
grease.
To relubricate bearings use the following procedure:
CAUTION
Overgreasing creates heat and is the cause
of many problems requiring repair. DO NOT
OVERGREASE.
1. Never relubricate pump bearings while unit is
running. If necessary, shut down pump
according to section V, paragraph C.
2. Remove plugs opposite grease fittings on
both ends of bearing frame.

6
CAUTION
Do not lubricate bearings with a power
grease gun.
3. Using a hand-operated grease gun on
grease fittings, add approximately one ounce
of fresh grease for each bearing. With most
hand-operated grease guns, two or three
pumps are enough. DO NOT
OVERGREASE. When installing new
bearings, pack new bearings only half full
with grease.
Bearing temperature may rise above normal
immediately after lubrication, but should stabilize
within four to eight hours.
NOTE
Carver recommends replacing bearings if
removed from the shaft. If it is necessary to
reuse bearings that are in good condition,
use proper bearing replacement procedures
outlined in this section.
VII. TROUBLESHOOTING.
The pump should provide reliable service and long life
if the installation and starting procedures outlines in
this manual are followed. If operating problems do
occur, refer to Table 1 to eliminate some of the most
common causes of those problems.

7
Table 1. Troubleshooting
SYMPTOM PROBABLE CAUSE REMEDY
Motor will not start. 1. No input power.
2. Improper voltage.
3. Motor overload.
4. Mechanical obstruction that
prevents rotor from turning.
1. Check connections to
electrical power source.
Check fuses or circuit
breakers. Check terminals at
source of power input.
2. Check voltage at motor
terminals.
3. Refer to “Overload on motor”.
4. Examine and clean pumping
unit thoroughly. Check for
bearing failure or bent shaft.
Motor overheats. 1. Motor overload.
2. Improper voltage.
3. Obstruction in ventilation.
4. Insufficient cooling medium.
5. Overgreased motor bearings.
6. Improper motor grease.
1. Refer to “Overload on motor”.
2. Check voltage at motor
terminals.
3. Check ventilation opening of
motor. Keep clear of
obstructions at all times.
4. Check ambient temperature.
Motor temperature should
not exceed ambient
temperature plus the rated
temperature increase of the
unit.
5. Remove lubricant from
bearing chamber until the
proper amount of grease is
in chamber.
6. Remove grease and replace
with grease recommended
by motor manufacturer.
Failure to deliver fluid. 1. Discharge valve closed.
2. Discharge head above
shutoff.
3. Impeller or suction pipe
clogged.
4. Wrong rotation.
5. Liquid level in tank too low.
1. Check discharge valve.
2. Consult with nearest Carver
Pump Company
representative or factory.
3. Inspect and clean impeller
and suction pipe.
4. Check power connection to
motor.
5. Add liquid to system.
Reduced capacity and/or
pressure. 1. Discharge valve closed. 2. Damaged impeller.
3. Impeller or suction pipe
partially clogged.
4. Suction pipe too close to
bottom of tank.
5. Liquid level in tank too low.
6. Total head too high.
7. Wrong rotation.
1. Check discharge valve.
2. Replace impeller.
3. Inspect and clean impeller
and suction pipe.
4. Reduce length of pipe.
5. Add liquid to system.
6. Consult with nearest Carver
Pump Company
representative or factory.
7. Check power connections to
motor.

8
Table 1. Troubleshooting (cont.)
SYMPTOM PROBABLE CAUSE REMEDY
Reduced capacity and/or
pressure (cont). 8. Speed too low.
9. Semi-open impeller running
clearance too large.
10. Enclosed impeller clearance
between suction cover or
wear ring, if equipped, is too
large.
8. Consult wit nearest Carver
Pump Company
representative or factory.
9. Check semi-open impeller
clearance according to
section VIII, paragraph D.
10. Check enclosed impeller
clearance according to
section VIII paragraph B,
procedure seven.
Pump surges 1. Liquid level in tank too low. 1. Add liquid to system.
Pump loses prime after starting. 1. Suction lift is over six feet.
2. Liquid level in tank too low. 1. Check with vacuum gauge. 2. Add liquid to system.
Overload on motor. 1. Head lower than that for
which pump is designed.
2. Mechanical defects of pump
or motor such as bent shaft,
binding or rubbing rotating
element.
3. Liquid handled of higher
specific gravity or lower
viscosity than intended
application.
1. Consult with nearest Carver
Pump Company
representative or factory.
2. Replace defective parts or
replace pump or motor.
3. Consult with nearest Carver
Pump Company
representative or factory.
Insulation failure. 1. Oil or water soaked windings.
2. Improper voltage.
1. Return motor to the motor
manufacturer.
2. Check voltage at motor
terminals.
Vibrates or is noisy 1. Insufficient or insecure
foundation.
2. Mechanical defects of pump
or motor such as bent shaft,
binding rotating element, or
warped impeller.
3. Foreign matter in pump.
4. Strain due to piping or
improper piping supports.
5. Damaged bearings.
1. Enlarge foundation or
relocate pumping unit so it
can be firmly bolted to
foundation.
2. Replace defective parts or
replace pump or motor.
3. Disassemble pump. Identify
and remove foreign matter.
Clean parts and replace
damaged parts.
4. Check piping alignment and
remove piping weight from
pump with proper supports.
5. Replace bearings.

9
VIII. SERVICE AND REPAIR.
A. DISASSEMBLY AND ASSEMBLY. Read
this entire section and study figures one through
seven of this manual.
1. Stop pump in accordance with section V,
paragraph C. Disconnect, lock out, and tag
electrical power supply to motor. Disconnect
wiring from motor.
2. Shut off and tag all valves controlling the
flow of liquid to the tank and from the pump.
If necessary, flush pump to remove corrosive
or toxic pumpage.
The GVC pumps are of the same basic design, but
some parts do vary between models. Parts that may
vary from model to model are: semi-open or enclosed
impeller, wear ring (enclosed impeller pumps only),
and shaft sleeve. The top pullout design of the GVT
pump allows the shaft and impeller to be removed
without disconnecting the piping or casing.
NOTE
Prior to assembly, refer to the following
paragraphs in this section: Parts Inspection,
paragraph B, Adjusting Impeller Clearance,
paragraph C, and Wear Ring Replacement,
paragraph D.
During disassembly, mark parts to determine the
proper location when assembly begins. When
removing capscrews, use socket or box-ended
wrenches instead of open-ended wrenches. After
extended operation, it may be difficult to separate
some components. Rust solvent may be used and
suitable extricating tools where possible. Do not use
metal-headed hammers; use only those with plastic or
rubber heads.
CAUTION
To avoid damaged o-rings, check to make
sure all parts are free of sharp edges or
burrs.
After prolonged operation, components may not be
easily removed from shaft. In such instances, rust
solvent may be used and suitable extracting tools
applied wherever possible. Do NOT use force under
any circumstances.
Refer to appropriate sectional drawing, for location of
parts followed by an item number. Assemble the
pump in accordance with accepted rules of
engineering practice.
GVC, 1520 FRAME (Cantilevered) (Refer to
Figure 1 and Table 6)
DISASSEMBLY
Disassemble the pumping unit using the following
procedure:
1. Remove coupling guard (131). Disconnect
coupling (42).
WARNING
To lift motor, a hoist or suitable lifting device
must be used.
2. Attach hoist to motor. Remove capscrews
(607), freeing motor from motor bracket (19).
Hoist motor and motor coupling half away
from pump and rest on plywood, heavy
cardboard or other adequate durable
surface.
3. Attach lifting straps and eyebolts to base
(23). Take to a suitable work area.
4. Remove bolts (611). Remove suction cover
(9) with o-ring (89A).
NOTE
Replace used o-rings, seals and bearings
with new o-rings, seals and bearings.
5. Remove impeller bolt (26) and impeller
washer (28).
6. Remove impeller (2) and impeller key (32).
CAUTION
Do NOT pry composite parts. Damage may
occur to composite parts if they are struck
with force, pounded with a metal object or
pried.
7. Remove shaft sleeve (14), if equipped. Refer
to sectional drawings, Optional Sleeve detail.
8. Remove nuts (617) with bolts (604) and
washers (654).
WARNING
To lift bearing housing, use a hoist or
suitable lifting device.
9. Remove bearing housing (19) assembly and
shaft (6).
10. Inspect throttle bushing (63) in accordance
with paragraph C, procedure 5 and Table 2
of this section. Do NOT remove throttle
bushing (63) and o-ring (89X), unless
necessary.

10
NOTE
Do NOT disassemble column (101) from
casing (1) or base (23), unless necessary.
11. Remove coupling half on pump side and
remove coupling key (46).
12. Loosen setscrew (667) to remove bearing
cap (37).
13. Remove bearings (16) and (18) with shaft (6)
assembly from bearing housing (19).
14. Remove outer snap ring (176).
15. Remove bearings (16) and (18) from shaft
(6).
16. Remove bearing spring (449).
ASSEMBLY
Assemble the pumping unit using the following
procedures: NOTE
Carver recommends that grease seals (47),
o-ring (89), and locking devices with a nylock
feature be replaced with new if disturbed
from position.
Carver recommends that bearings (16 and
18) be replaced if removed from shaft.
1. Install bearing spring (449) onto shaft (6)
between two bearing seats.
2. Install upper bearing (16) and lower bearing
(18) onto shaft (6). Bearings may be pressed
onto shaft or heated so they slide onto shaft.
Pack bearings half full of grease. Refer to
section VI, paragraph D for proper grease
type.
3. Install outer snap ring (176).
4. Install shaft and bearings into bearing
housing (19).
5. Install new grease seal (47) in bearing cap
and grease seal (47A) in column (101).
6. Install bearing cap (37) and hand tighten.
7. Install coupling key (46) and slide coupling
half onto pump.
8. If throttle bushing (63) was removed, press
new throttle bushing (63) and o-ring (89X)
into column (101).
WARNING
To lift bearing housing, use a hoist or
suitable lifting device.
9. Install bearing housing assembly and shaft
(6) into column (101) and secure with bolts
(604), washers (654), and nuts (617).
10. Install shaft sleeve (14), if equipped. Refer to
sectional drawings, Optional Sleeve detail.
CAUTION
Use removable thread locker when installing
impeller bolt.
11. Install impeller key (32) and impeller (2) and
secure with washer (28) and bolt (26).
12. Install new o-ring (89A) onto suction cover
(9).
13. Install suction cover (9) and secure to casing
(1) with bolts (611).
14. Adjust impeller in accordance with paragraph
C of this section.
15. Attach lifting straps and eyebolts to base
(23).
16. Install pumping unit back to site.
17. Attach hoist to motor and move motor and
motor coupling half into place on motor
bracket (19) and secure with bolts (607).
18. Refer to section IV for alignment information.
19. Reconnect coupling.
NOTE
Rotate shaft by hand to make sure pump
rotates freely before start-up.
GVC, 1530/1540 FRAME (Cantilevered) (Refer
to Figure 2, Figure 3, and Table 6)
DISASSEMBLY
Disassemble the pumping unit using the following
procedure:
1. Remove coupling guard (131). Disconnect
coupling (42).
WARNING
To lift motor, a hoist or suitable lifting device
must be used.
2. Attach hoist to motor. Remove capscrews
(607), freeing motor from motor bracket (71).
Hoist motor and motor coupling half away
from pump and rest on plywood, heavy
cardboard or other adequate durable
surface.
3. Attach lifting straps and eyebolts to base
(23). Take to a suitable work area.
4. Remove bolts (611). Remove suction cover
(9) with o-ring (89A).
NOTE
Replace used o-rings, seals, and bearings
with new o-rings, seals, and bearings.
5. Remove impeller bolt (26) and impeller
washer (28).
6. Remove impeller (2) and impeller key (32).
7. Remove shaft sleeve (14), if equipped. Refer
to sectional drawings, Optional Sleeve detail.

11
CAUTION
Do NOT pry composite parts. Damage may
occur to composite parts if they are struck
with force, pounded with a metal object or
pried.
8. Remove nuts (617) with bolts (604) and
washers (654).
WARNING
To lift bearing housing, use a hoist or
suitable lifting device.
9. Remove bearing housing (19) assembly and
shaft (6).
10. Inspect throttle bushing (63) in accordance
with paragraph C, procedure 5 and Table 2
of this section. Do NOT remove throttle
bushing (63) and o-ring (89X), unless
necessary.
NOTE
Do NOT disassemble column (101) from
casing (1) or base (23), unless necessary.
11. Remove coupling half on pump side and
remove coupling key (46).
12. Remove nuts (616) and bolts (609) to
remove motor bracket (71).
13. Remove capscrews (608) from bearing
cartridge (37) and tighten jacking capscrews
(610) to remove shaft (6) and bearings (16)
and (18) from bearing housing.
14. Remove snap ring (176) from bearing
cartridge (37).
15. Remove bearing cartridge (37) from shaft
assembly.
16. Uncrimp bearing lockwasher (69) and
remove bearing locknut (22) and bearing
lockwasher (69).
17. Press bearings (16) and (18) off shaft (6).
ASSEMBLY
Assemble the pumping unit using the following
procedures: NOTE
Carver recommends that grease seals (47),
o-ring (89), and locking devices with a nylock
feature be replaced with new if disturbed
from position.
Carver recommends that bearings (16 and
18) be replaced if removed from shaft.
1. Install oil seal (47) in bearing frame (19).
Place snap ring (176) on shaft (6) between
two bearing seats.
2. Install radial bearing (16) and thrust bearing
(18) on shaft (6). Bearings (16 and 18) may
be pressed onto shaft (6) or heated so they
will slide onto shaft (6). Pack bearings half
full with grease. Refer to section VI,
paragraph D for proper grease type. Install
bearing lockwasher (69) and bearing locknut
(22). Crimp lockwasher (69).
3. Install bearing cartridge (37) over thrust
bearing (18). Install snap ring (176) in
bearing cartridge (37).
4. Set wet end of shaft (6) in through bearing
frame end of bearing frame (19). Install shaft
(6), bearings (16 and 18), and bearing
cartridge (37) through bearing frame (19).
5. Secure bearing cartridge (37) to bearing
frame (19) with capscrews (608) and jacking
screw (610). Tighten capscrews (608) by
hand only, leaving a 0.25-inch gap between
bearing cartridge (37) and bearing frame
(19) so impeller vanes will not be damaged
when rotating element is installed in casing
(1).
6. Install coupling key (46) in keyway of shaft
(6). Install pump coupling (42) half.
7. Install motor bracket (71) and secure to
bearing frame (19) with nuts (616) on
capscrews (609).
8. Install grease seal (47) in column (101).
9. If throttle bushing (63) was removed, press
new throttle bushing (63) and o-ring (89X)
into column (101).
10. Install bearing housing assembly into column
(101).
11. Attach assembled bearing frame (19) to
column (101) with bolt (604), washer (654),
and nut (617).
12. Install shaft sleeve (14), if equipped. Refer to
sectional drawings, Optional Sleeve detail.
CAUTION
Use removable thread locker when installing
impeller bolt.
13. Install impeller key (32) in shaft (6). Install
impeller (2) and impeller washer (28).
Secure to end of shaft (6) with new bolt (26).
Do not use old bolt as impeller damage
could result.
WARNING
To lift rotating element, a hoist or suitable
lifting device must be used.
14. Install new o-ring (89A) onto suction cover
(9).
15. Install suction cover (9) onto casing (1).
16. Adjust impeller in accordance with paragraph
C of this section.
17. Connect coupling. Attach coupling guard.
18. Reconnect wiring to motor. Remove tags
from electrical power supply. Unlock and
connect electrical power supply to motor.

12
19. Remove tags from system valves. Open all
system valves.
20. Start pumping unit in accordance with
section V, paragraphs A and B.
GVT, 1520 FRAME (Top Pullout) (Refer to
Figure 4 and Table 7)
DISASSEMBLY
Disassemble the pumping unit using the following
procedure:
1. Remove coupling guard (131). Disconnect
coupling (42).
WARNING
To lift motor, a hoist or suitable lifting device
must be used.
2. Attach hoist to motor. Remove capscrews
(607), freeing motor from bearing frame (19).
Hoist motor and motor coupling half away
from pump and rest on plywood or heavy
cardboard.
3. Screw lifting eye into the tapped hole located
at coupling end of pump shaft or place a
strap through bearing frame (19). Attach
hoisting equipment to lifting eye or strap.
4. Remove nuts (615) from studs (630)
separating outer column (53) from column
plate (101).
WARNING
To lift rotating element, a hoist or suitable
lifting device must be used.
5. Hoist rotating element and move to a
suitable work area.
CAUTION
Do NOT pry composite parts. Damage may
occur to composite parts if they are struck
with force, pounded with a metal object or
pried.
6. Remove impeller capscrew (26) from end of
shaft (6). Remove impeller washer (28). Pull
impeller (2) from shaft (6). Remove impeller
key (32) from either impeller (2) or shaft (6).
7. Remove shaft sleeve (14), if equipped. Refer
to sectional drawings, Optional Sleeve detail.
8. Remove nut (617). Remove bolt (604) and
washer (654) to remove bearing frame (19)
from column (101).
9. Inspect throttle bushing (63) in accordance
with paragraph C, procedure 5 and Table 2
of this section. Do NOT remove throttle
bushing (63) and o-ring (89X), unless
necessary.
10. Remove pump coupling (42) half. Remove
coupling key (46) from either coupling (42) or
shaft (6).
11. Loosen setscrew (667) to remove bearing
cap (37).
12. Remove bearings (16) and (18) with shaft (6)
assembly from bearing housing (19).
13. Remove outer snap ring (176).
14. Remove bearings (16) and (18) from shaft
(6).
15. Remove bearing spring (449).
ASSEMBLY
Assemble the pumping unit using the following
procedures: NOTE
Carver recommends that grease seals (47),
o-ring (89), and locking devices with a nylock
feature be replaced with new if disturbed
from position.
Carver recommends that bearings (16 and
18) be replaced if removed from shaft.
1. Install bearing spring (449) onto shaft (6)
between two bearing seats.
2. Install upper bearing (16) and lower bearing
(18) onto shaft (6). Bearings may be pressed
onto shaft or heated so they slide onto shaft.
Pack bearings half full of grease. Refer to
section VI, paragraph D for proper grease
type.
3. Install outer snap ring (176).
4. Install shaft and bearings into bearing
housing (19).
5. Install new grease seal (47) in bearing cap
and grease seal (47A) in column (101).
6. Install bearing cap (37) and hand tighten.
7. Install coupling key (46) and slide coupling
half onto pump.
8. If throttle bushing (63) was removed, press
new throttle bushing (63) and o-ring (89X)
into column (101).
WARNING
To lift bearing housing, use a hoist or
suitable lifting device.
9. Install bearing housing assembly and shaft
(6) into column (101) and secure with bolts
(604), washers (654), and nuts (617).
10. Install shaft sleeve (14), if equipped. Refer to
sectional drawings, Optional Sleeve detail.

13
CAUTION
Use removable thread locker when installing
impeller bolt.
11. Install impeller key (32) and impeller (2) and
secure with washer (28) and bolt (26).
12. Install lifting eye into end tap or place a strap
through bearing housing (19). Attach hoisting
equipment to lifting eye or strap and return
rotating element to pump.
13. Slowly lower rotating element into casing (1).
Do not force rotating element. If installed
correctly, it will slide in easily. Secure inner
column (101) to outer column (53) with nuts
(615) and washers (656) on studs (630).
14. Detach hoisting equipment and remove
lifting eye from end tap.
WARNING
To lift motor, a hoist or suitable lifting device
must be used.
15. Attach hoist and move motor, and motor
coupling half into place on bearing housing
(19). Secure motor to the bearing housing
(19) with capscrews (607).
16. Adjust impeller clearance in accordance with
paragraph C of this section.
17. Connect coupling. Attach coupling guard.
18. Reconnect wiring to motor. Remove tags
from electrical power supply. Unlock and
connect electrical power supply to motor.
19. Remove tags from system valves. Open all
system valves.
20. Start pumping unit in accordance with
section V, paragraphs A and B.
GVT, 1530/1540 FRAME (Top Pullout) (Refer to
Figure 5, Figure 6, and Table 7)
DISASSEMBLY
Disassemble the pumping unit using the following
procedure:
1. Remove coupling guard (131). Disconnect
coupling (42).
WARNING
To lift motor, a hoist or suitable lifting device
must be used.
2. Attach hoist to motor. Remove capscrews
(607), freeing motor from motor bracket (71).
Hoist motor and motor coupling half away
from pump and rest on plywood or heavy
cardboard.
WARNING
To lift bearing/column assembly, a hoist or
suitable lifting device must be used.
3. Screw lifting eye into the tapped hole located
at coupling end of pump shaft or place a
strap through motor bracket (71). Attach
hoisting equipment to lifting eye or strap.
4. Remove nuts (615) from studs (630)
separating outer column (53) from column
plate (101).
WARNING
To lift rotating element, a hoist or suitable
lifting device must be used.
5. Hoist rotating element and move to a
suitable work area.
CAUTION
Do NOT pry composite parts. Damage may
occur to composite parts if they are struck
with force, pounded with a metal object or
pried.
6. Remove impeller capscrew (26) from end of
shaft (6). Remove impeller washer (28). Pull
impeller (2) from shaft (6). Remove impeller
key (32) from either impeller (2) or shaft (6).
7. Remove shaft sleeve (14), if equipped. Refer
to sectional drawings, Optional Sleeve detail.
8. Remove nuts (616) and capscrews (609)
separating motor bracket (71) from bearing
frame (19).
9. Remove pump coupling (42) half. Remove
coupling key (46) from either coupling (42) or
shaft (6).
10. Remove nuts (617) with bolts (604) and
washers (654).
11. Inspect throttle bushing (63) in accordance
with paragraph C, procedure 5 and Table 2
of this section. Do NOT remove throttle
bushing (63) and o-ring (89X), unless
necessary.
12. Remove capscrews (608) separating bearing
cartridge (37) from bearing frame (19). Use
forcing capscrews (610) to loosen bearing
cartridge (37) from bearing frame (19).
13. Pull shaft (6) out through coupling end of the
bearing frame (19). The bearings (16 and
18) and bearing cartridge (37) will remain on
shaft (6).
14. Remove snap ring (176) from bearing
cartridge (37). Let snap ring (176) rest on
shaft. Pull bearing cartridge (37) from
bearing (18).
15. Uncrimp bearing lockwasher (69) and
remove bearing locknut (22) and lockwasher
(69).

14
16. Remove thrust bearing (18) from coupling
end of shaft (6). Remove radial bearing (16)
from shaft (6). Remove snap ring (176) from
shaft (6).
ASSEMBLY
Assemble the pumping unit using the following
procedures: NOTE
Carver recommends that grease seals (47),
o-ring (89), and locking devices with a nylock
feature be replaced with new if disturbed
from position.
Carver recommends that bearings (16 and
18) be replaced if removed from shaft.
1. Install oil seal (47) in bearing frame (19).
Place snap ring (176) on shaft (6) between
two bearing seats.
2. Install radial bearing (16) and thrust bearing
(18) on shaft (6). Bearings (16 and 18) may
be pressed onto shaft (6) or heated so they
will slide onto shaft (6). Pack bearings half
full with grease. Refer to section VI,
paragraph D for proper grease type. Install
bearing lockwasher (69) and bearing locknut
(22). Crimp lockwasher (69).
3. Install bearing cartridge (37) over thrust
bearing (18). Install snap ring (176) in
bearing cartridge (37).
4. Set wet end of shaft (6) in through bearing
frame end of bearing frame (19). Install shaft
(6), bearings (16 and 18), and bearing
cartridge (37) through bearing frame (19).
5. Secure bearing cartridge (37) to bearing
frame (19) with capscrews (608) and jacking
screw (610). Tighten capscrews (608) by
hand only, leaving a 0.25-inch gap between
bearing cartridge (37) and bearing frame
(19) so impeller vanes will not be damaged
when rotating element is installed in casing
(1).
6. Install coupling key (46) in keyway of shaft
(6). Install pump coupling (42) half.
7. Install motor bracket (71) and secure to
bearing frame (19) with nuts (616) on
capscrews (609).
8. Install grease seal (47) in column (101).
9. If throttle bushing (63) was removed, press
new throttle bushing (63) and o-ring (89X)
into column (101).
WARNING
To lift rotating element, a hoist or suitable
lifting device must be used.
10. Install bearing housing assembly into column
(101).
11. Attach assembled bearing frame (19) to
column (101) with bolt (604), washer (654),
and nut (617).
12. Install shaft sleeve (14), if equipped. Refer to
sectional drawings, Optional Sleeve detail.
CAUTION
Use removable thread locker when installing
impeller bolt.
13. Install impeller key (32) in shaft (6). Install
impeller (2) and impeller washer (28).
Secure to end of shaft (6) with new bolt (26).
Do not use old bolt as impeller damage
could result.
14. Install lifting eye into end tap or place a strap
through motor bracket (71). Attach hoisting
equipment to lifting eye or strap and return
rotating element to pump.
15. Slowly lower rotating element into casing (1).
Do not force rotating element. If installed
correctly, it will slide in easily. Secure inner
column (101) to outer column (53) with nuts
(615) and washers (656) on studs (630).
16. Detach hoisting equipment and remove
lifting eye from end tap.
WARNING
To lift motor, a hoist or suitable lifting device
must be used.
17. Attach hoist and move motor, and motor
coupling half into place on motor bracket
(71). Secure motor to the motor bracket (71)
with capscrews (607).
18. Adjust impeller in accordance with paragraph
C of this section.
19. Connect coupling. Attach coupling guard.
20. Reconnect wiring to motor. Remove tags
from electrical power supply. Unlock and
connect electrical power supply to motor.
21. Remove tags from system valves. Open all
system valves.
22. Start pumping unit in accordance with
section V, paragraphs A and B.
B. PARTS INSPECTION.
1. All parts should be thoroughly cleaned or
replaced with new ones, if necessary. All
sealing faces should be perfectly clean. It is
recommended that oil seals (47), o-ring (89),
and locking devices with a nylock feature be
replaced with new if disturbed from position.
2. Inspect bearings (16 and 18) from damage.
Damaged bearings must be replaced. If
bearings are removed from shaft, it is
recommended that bearings be replaced. If
bearing replacement is not possible and
bearings are in good condition bearings
should be cleaned and lubricated according
to section VI, paragraph D. Provide

15
appropriate protection for bearings until time
of usage.
3. Inspect for bent shaft (6) and replace shaft
(6), if necessary. Shaft threads should be in
good condition. Bearing seat must be in
perfect condition.
4. If the impeller (2) shows excessive wear due
to abrasion or corrosion and performance
cannot be restored, it must be replaced.
5. Inspect the inside diameter of throttle
bushing (63). The inside diameter of the
throttle bushing (63) will increase with wear.
The throttle bushing requires replacement if
the inside diameter is more than 0.020 inch
out of round or .005 inch oversized. Refer to
Table 2 for maximum diameter of throttle
bushing.
Table 2. Throttle Bushing Dimensions
Frame Size Maximum
Diameter Minimum Diameter
1520 1.277 inches 1.275 inches
1530 1.777 inches 1.775 inches
1540 2.163 inches 2.160 inches
6. Inspect and replace any defective grease
fittings.
7. On an enclosed impeller pump, check the
clearance as follows:
a. Measure outside diameter of front
impeller (2) hub in three places. Refer to
Table 3, Enclosed Impeller Clearance.
b. Measure inside diameter of suction
cover (9) or wear ring (7), if equipped, in
three places.
c. If difference between high reading of
inside diameter of the suction cover (9)
or wear ring (7), if equipped, and low
reading of outside diameter of impeller
(2) hub exceeds double the maximum
clearances given in Table 3, replace
suction cover (9) and impeller (2) or
wear ring (7), if equipped. To replace
wear ring (7), refer to paragraph D of
this section.
Table 3. Enclosed Impeller Clearance
FACTORY
STANDARD
DIAMETRIC
CLEARANCE
Ordering
Code
Impeller Size Wear Ring Size
MINIMUM MAXIMUM
DA 2.750/2.749 inches 2.762/2.760 inches .010 in. .013 in.
DB 4.724/4.722 inches 4.740/4.742 inches .016 in. .020 in.
DC 4.724/4.722 inches 4.740/4.742 inches .016 in. .020 in.
DD 4.724/4.722 inches 4.740/4.742 inches .016 in. .020 in.
DE 7.937/7.935 inches 7.956/7.958 inches .019 in. .023 in.
EA 3.337/3.335 inches 3.347/3.349 inches .010 in. .014 in.
EB 4.124/4.122 inches 4.140/4.142 inches .016 in. .020 in.
EC 4.715/4.713 inches 4.731/4.733 inches .016 in. .020 in.
ED 5.500/5.498 inches 5.517/5.518 inches .017 in. .020 in.
EE 5.894/5.892 inches 5.912/5.914 inches .018 in. .020 in.
EF 6.681/6.679 inches 6.698/6.700 inches .017 in. .021 in.
EG 7.862/7.860 inches 7.881/7.882 inches .019 in. .022 in.

16
C. ADJUSTING IMPELLER CLEARANCE ON
PUMP EQUIPPED WITH SEMI-OPEN
IMPELLER. To adjust impeller clearance on a
pump equipped with a semi-open impeller, 1520
frame, use the following procedure:
1. Stop pump according to section V,
paragraph C. Lock out and tag the power to
the driver. Remove coupling guard.
2. Disconnect coupling (42).
3. Loosen setscrew (667).
4. Once pump is in the vertical position, loosen
bearing cap (37) until impeller rubs on
suction head.
5. Place a dial indicator on the end of shaft (6).
6. Tighten bearing cap (37) until indicator reads
between .010 and .015 inch.
7. To hold setting, evenly tighten setscrew
(667) while watching indicator.
8. Turn shaft (6) by hand to ensure impeller is
not rubbing.
To adjust impeller clearance on a pump equipped with
a semi-open impeller, 1530/1540 frame, use the
following procedure:
1. Stop pump according to section V,
paragraph C. Lock out and tag the power to
the driver. Remove coupling guard.
2. Disconnect coupling (42).
3. Once the pump is in the vertical position,
loosen capscrews (608) from bearing
cartridge (37). Loosen forcing capscrews
(610) from bearing cartridge (37) until
impeller rubs suction cover.
4. Place a dial indicator on the end of shaft (6).
5. Tighten forcing capscrews (610) evenly until
indicator reads between 0.010 and 0.015
inch.
6. To hold setting, evenly tighten capscrews
(608) while watching indicator.
7. Turn shaft (6) by hand to ensure impeller is
not rubbing.
NOTE
Shaft setting should be checked again after
pump is installed and before restarting
pump. Clearance should be between 0.010
inch and 0.015 inch over original
measurement of gap.
8. Reconnect coupling.
9. Replace coupling guard.
10. Start pump according to section V,
paragraphs A and B.
To adjust impeller clearance on a pump equipped with
an enclosed impeller, 1520 frame, use the following
information:
If the impeller bumps casing (1), adjust bearing cap
(37) upward or downward until the rotating element
turns freely.
To adjust impeller clearance on a pump equipped with
an enclosed impeller, 1530/1540 frame, use the
following information:
If pump is equipped with an enclosed impeller and
impeller (2) bumps casing (1) when rotating element
is installed, use the following procedure: to adjust
impeller clearance:
a. Measure the gap between the bearing
cartridge (37) and bearing frame (19). Check
to make sure coupling gap is not binding.
b. Tighten forcing capscrews (610) half a turn,
until no rubbing occurs.
c. Evenly tighten capscrews (608).
D. REPLACEMENT OF OPTIONAL WEAR
RING ON PUMP EQUIPPED WITH ENCLOSED
IMPELLER. If your pump is equipped with an
enclosed impeller, it may have an optional,
replaceable wear ring (7) in the suction cover (9) or
casing (1). If your pump is equipped with the optional
wear ring (7), use the following instructions and figure
7 for wear ring replacement.
NOTE
Stainless fitted and all iron pumps do not use
a wear ring. Stainless steel pumps use a
wear ring.
The clearance between the wear ring (7) and impeller
(2) hub will increase with wear. Internal leakage will
result and pump performance will decrease.
Table 4. Impeller/Wear Ring Matching Materials
IMPELLER MATERIAL WEAR RING MATERIAL
All Iron & Stainless Fitted Cast Iron
Stainless Steel 17-4PH
To replace the wear ring, follow the disassembly
procedures in paragraphs A and B of this section to
the point where the casing or suction cover has been
removed and the wear ring is accessible. Once the
wear ring is accessible, use the following procedures:
1. Remove wear ring (7) from suction cover (9).
This can best be accomplished on a lathe.
2. Inspect impeller (2) hub for damage.
3. Press new wear ring (7) into suction cover
(9). Beveled edge of wear ring (7) is installed
toward impeller (2).