Xylem G&L A-C 8100 Series User manual

INSTRUCTION MANUAL
AC5659D
G&L Pumps Series A-C 8100
Base Mounted Centrifugal
Pump

Table of Contents
1 Introduction and Safety..............................................................................................................3
1.1 Introduction.......................................................................................................................... 3
1.2 Safety..................................................................................................................................... 3
1.2.1 Safety terminology and symbols.................................................................................3
1.2.2 Safety instruction decals.............................................................................................. 4
1.3 User safety.............................................................................................................................5
1.3.1 Wash the skin and eyes................................................................................................6
1.4 Protecting the environment................................................................................................6
2 Transportation and Storage...................................................................................................... 7
2.1 Examine the delivery........................................................................................................... 7
2.1.1 Examine the package................................................................................................... 7
2.1.2 Examine the unit............................................................................................................7
2.2 Safe handling requirements............................................................................................... 7
2.3 Storage requirements....................................................................................................... 10
3 Product Description................................................................................................................. 11
3.1 General description...........................................................................................................11
3.2 Operational specifications................................................................................................11
3.3 Nameplate information.....................................................................................................12
4 Installation................................................................................................................................. 13
4.1 Preinstallation.....................................................................................................................13
4.1.1 Pump location guidelines..........................................................................................13
4.1.2 Typical installation...................................................................................................... 14
4.1.3 Foundation requirements..........................................................................................14
4.1.4 Level the base on a concrete foundation ............................................................... 15
4.1.5 Grout the baseplate....................................................................................................16
4.2 Coupling alignment...........................................................................................................16
4.2.1 Prepare for alignment................................................................................................ 16
4.2.2 Align the pump using a straight edge and calipers...............................................17
4.2.3 Align the pump using a dial indicator......................................................................18
4.2.4 Final alignment............................................................................................................19
4.2.5 Optional alignment procedure.................................................................................19
4.2.6 Dowel the pump and driving unit.............................................................................19
4.2.7 Coupler limitations..................................................................................................... 20
4.3 Piping checklists.................................................................................................................20
4.3.1 Piping checklist........................................................................................................... 20
4.3.2 Suction piping checklist.............................................................................................21
5 Commissioning, Startup, Operation, and Shutdown.......................................................... 24
5.1 Preparation for startup...................................................................................................... 24
5.1.1 Pre-start checks........................................................................................................... 24
5.1.2 Priming.........................................................................................................................25
5.1.3 Starting.........................................................................................................................25
5.1.4 Operating checks....................................................................................................... 25
5.1.5 Check the rotation...................................................................................................... 25
5.1.6 Freezing protection.................................................................................................... 26
5.1.7 Change the rotation................................................................................................... 26
Table of Contents
G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL 1

6 Maintenance..............................................................................................................................28
6.1 Maintenance schedule...................................................................................................... 28
6.2 Flood-damaged pumps....................................................................................................29
6.3 Bearing maintenance........................................................................................................ 29
6.3.1 Regrease the grease-lubricated bearings............................................................... 29
6.3.2 Lubricating grease requirements............................................................................. 30
6.4 Shaft-seal maintenance..................................................................................................... 30
6.4.1 Mechanical seal maintenance................................................................................... 30
6.4.2 Packed stuffing box maintenance............................................................................ 31
6.5 Cleaning without dismantling the pump........................................................................ 31
6.6 Disassembly........................................................................................................................31
6.6.1 Disassembly precautions...........................................................................................31
6.6.2 Drain the pump...........................................................................................................32
6.6.3 Remove the hex coupling guard.............................................................................. 32
6.6.4 Disassemble the pump with mechanical seal on the shaft....................................33
6.6.5 Disassemble the pump with mechanical seals on shaft sleeve............................ 34
6.6.6 Disassemble the pump with packing....................................................................... 36
6.7 Pre-assembly inspections................................................................................................. 37
6.7.1 Replacement guidelines............................................................................................ 37
6.7.2 Shaft and sleeve inspection.......................................................................................38
6.8 Dimensions......................................................................................................................... 38
6.9 Reassembly.........................................................................................................................41
6.9.1 Reassemble the pump with mechanical seal on the shaft.....................................41
6.9.2 Reassemble the pump with the mechanical seals on the shaft sleeve................ 44
6.9.3 Reassemble the pump with packing........................................................................ 46
6.9.4 Install the hex coupling guard...................................................................................49
6.9.5 Assembly references.................................................................................................. 50
7 Troubleshooting....................................................................................................................... 51
7.1 Operation troubleshooting.............................................................................................. 51
8 Product warranty...................................................................................................................... 55
Table of Contents
2 G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL

1 Introduction and Safety
1.1 Introduction
Purpose of this manual
The purpose of this manual is to provide necessary information for:
• Installation
• Operation
• Maintenance
CAUTION:
Read this manual carefully before installing and using the product. Improper use of the
product can cause personal injury and damage to property, and may void the warranty.
NOTICE:
Save this manual for future reference, and keep it readily available at the location of the
unit.
1.2 Safety
WARNING:
• The operator must be aware of safety precautions to prevent physical injury.
• Operating, installing, or maintaining the unit in any way that is not covered in this
manual could cause death, serious personal injury, or damage to the equipment. This
includes any modification to the equipment or use of parts not provided by Xylem. If
there is a question regarding the intended use of the equipment, please contact a
Xylem representative before proceeding.
• Do not change the service application without the approval of an authorized Xylem
representative.
CAUTION:
You must observe the instructions contained in this manual. Failure to do so could result
in physical injury, damage, or delays.
1.2.1 Safety terminology and symbols
About safety messages
It is extremely important that you read, understand, and follow the safety messages and
regulations carefully before handling the product. They are published to help prevent
these hazards:
• Personal accidents and health problems
• Damage to the product and its surroundings
• Product malfunction
Hazard levels
Hazard level Indication
DANGER:
A hazardous situation which, if not avoided, will result in
death or serious injury
1 Introduction and Safety
G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL 3

Hazard level Indication
WARNING:
A hazardous situation which, if not avoided, could result
in death or serious injury
CAUTION:
A hazardous situation which, if not avoided, could result
in minor or moderate injury
NOTICE:
Notices are used when there is a risk of equipment
damage or decreased performance, but not personal
injury.
Special symbols
Some hazard categories have specific symbols, as shown in the following table.
Electrical hazard Magnetic fields hazard
Electrical Hazard: CAUTION:
1.2.2 Safety instruction decals
WARNING:
Do NOT exceed the maximum working pressure of the pump. This information is listed on
the nameplate of the pump.
Alert symbol
This safety alert symbol is used in manuals and on the safety instruction decals on the pump
to draw attention to safety-related instructions.
When used, the safety alert symbol means that failure to follow the instructions may result in
a safety hazard.
Decals
Make sure your pump has these safety instruction decals and that they are located as this
figure shows. If the decals are missing or illegible, contact your local sales and service
representative for a replacement.
1 Introduction and Safety
4 G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL

P2002458
DO NOT RUN PUMP DRY, SEAL
DAMAGE MAY OCCUR.
INSPECT PUMP SEAL
REGULARLY FOR LEAKS,
REPLACE AS REQUIRED.
LUBRICATION REQUIREMENTS
CONSULT MANUALS.
PUMP: POLYUREA-BASED GREASE
FAILURE TO FOLLOW
INSTRUCTIONS COULD
RESULT IN INJURY OR
PROPERTY DAMAGE.
Make sure that all safety instruction decals are always clearly visible and readable.
1.3 User safety
General safety rules
These safety rules apply:
• Always keep the work area clean.
• Pay attention to the risks presented by gas and vapors in the work area.
• Avoid all electrical dangers. Pay attention to the risks of electric shock or arc flash
hazards.
• Always bear in mind the risk of drowning, electrical accidents, and burn injuries.
Safety equipment
Use safety equipment according to the company regulations. Use this safety equipment
within the work area:
• Hard hat
• Safety goggles, preferably with side shields
• Protective shoes
• Protective gloves
• Gas mask
• Hearing protection
• First-aid kit
• Safety devices
NOTICE:
Never operate a unit unless safety devices are installed. Also see specific information
about safety devices in other chapters of this manual.
Electrical connections
Electrical connections must be made by certified electricians in compliance with all
international, national, state, and local regulations. For more information about
requirements, see sections dealing specifically with electrical connections.
Precautions before work
Observe these safety precautions before you work with the product or are in connection
with the product:
• Provide a suitable barrier around the work area, for example, a guard rail.
• Make sure that all safety guards are in place and secure.
• Make sure that you have a clear path of retreat.
1 Introduction and Safety
G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL 5

• Make sure that the product cannot roll or fall over and injure people or damage
property.
• Make sure that the lifting equipment is in good condition.
• Use a lifting harness, a safety line, and a breathing device as required.
• Allow all system and pump components to cool before you handle them.
• Make sure that the product has been thoroughly cleaned.
• Disconnect and lock out power before you service the pump.
• Check the explosion risk before you weld or use electric hand tools.
1.3.1 Wash the skin and eyes
Follow these procedures for chemicals or hazardous fluids that have come into contact
with your eyes or your skin:
Condition Action
Chemicals or hazardous fluids in
eyes
1. Hold your eyelids apart forcibly with your fingers.
2. Rinse the eyes with eyewash or running water for at least 15 minutes.
3. Seek medical attention.
Chemicals or hazardous fluids on
skin
1. Remove contaminated clothing.
2. Wash the skin with soap and water for at least 1 minute.
3. Seek medical attention, if necessary.
1.4 Protecting the environment
Emissions and waste disposal
Observe the local regulations and codes regarding:
• Reporting of emissions to the appropriate authorities
• Sorting, recycling and disposal of solid or liquid waste
• Clean-up of spills
Exceptional sites
CAUTION: Radiation Hazard
Do NOT send the product to Xylem if it has been exposed to nuclear radiation, unless
Xylem has been informed and appropriate actions have been agreed upon.
Recycling guidelines
Always follow local laws and regulations regarding recycling.
1 Introduction and Safety
6 G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL

2 Transportation and Storage
2.1 Examine the delivery
2.1.1 Examine the package
1. Examine the package for damaged or missing items upon delivery.
2. Record any damaged or missing items on the receipt and freight bill.
3. If anything is out of order, then file a claim with the shipping company.
If the product has been picked up at a distributor, make a claim directly to the
distributor.
2.1.2 Examine the unit
1. Remove packing materials from the product.
Dispose of all packing materials in accordance with local regulations.
2. To determine whether any parts have been damaged or are missing, examine the
product.
3. If applicable, unfasten the product by removing any screws, bolts, or straps.
Use care around nails and straps.
4. If there is any issue, then contact a sales representative.
Shipping information
• Pumps and drivers are normally shipped from the factory mounted and painted with
primer and one finish coat.
• Couplings are shipped either assembled or have the coupling hubs mounted on the
shafts and the connecting members removed.
• When the connecting members are removed, they will be packaged in a separate
container and shipped with the pump or attached to the base plate.
Shaft alignment
• Shafts are in alignment when the unit is shipped; however, misalignment can occur
due to shipping.
• Refer to recommended alignment procedures in this manual if it is necessary to realign
the shaft.
2.2 Safe handling requirements
WARNING:
• Personal protective equipment should be worn when handling this equipment.
• Transportation & installation of this equipment should only be performed by qualified
personnel.
• A professional rigging company should be consulted before lifting the pump
assembly.
• Only use properly sized, certified lifting equipment & lifting devices, including slings,
suitably rated for the weights to be lifted.
• Slings, when used, must be of identical materials to avoid differences in stretch rates.
• Do not use lifting devices that are frayed, kinked, unmarked, or worn.
• Lifting eyebolts fitted on single components of the assembly (pump or motor) must not
be used to lift the complete assembly.
• Failure to observe these instructions could result in equipment or property damage,
serious injury, or death.
The pump assembly can arrive in a variety of ways:
2 Transportation and Storage
G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL 7

• Pump end only (bare pump)
• Pump less motor
• Pump, motor, & baseplate
Use the following recommended ways of handling HSC pump assemblies.
• The pump assembly should remain horizontal during transport and lifting.
• Lifting the pump end only (bare pump) should be done by placing one end of the
slings around or as close to the casing barrel as possible. After the slings are attached
to the unit, recheck to ensure they are securely in place. Make sure the slings are
adjusted to obtain an even lift.
Figure 1: Lifting pump end only with nylon sling, chain, or wire rope
• Lifting the pump less motor or the pump, motor, & baseplate should be done by
utilizing a forklift under the entire unit. Always take extra precaution to ensure the
weight is balanced & equally distributed across both forks. When the baseplate of the
assembly is structural channel construction, the pump and base plate should be set in
place first. The motor should then be separately lifted & mounted to the unit.
• Pump, base, and driver assemblies where the base length exceeds 100 inches may not
be safe to lift as a complete assembly. Damage to the baseplate may occur. If the
driver has been mounted on the baseplate at the factory, it is safe to lift the entire
assembly. If driver has not been mounted at the factory and the overall baseplate
length exceeds 100 inches, do not lift the entire assembly consisting of pump, base,
and driver. Instead lift the pump and baseplate to its final location without the driver.
Then mount the driver.
2 Transportation and Storage
8 G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL

Figure 2: Lift using a forklift
30° MAX.
Figure 3: Vertical - Half Pedestal - Model 200
• Place nylon sling, chain or wire rope around both flanges. Use a latch hook or standard
shackle and end loops. Be sure the lifting equipment is of sufficient length to keep the
lift angle less than 30° from the vertical (See Figure 3).
Storage location
The product must be stored in a covered and dry location free from heat, dirt, and
vibrations.
2 Transportation and Storage
G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL 9

NOTICE:
Protect the product against humidity, heat sources, and mechanical damage.
NOTICE:
Do not place heavy weights on the packed product.
2.3 Storage requirements
If the unit will not be installed and put into operation immediately upon arrival at the site,
or for an extended shutdown after the unit is in operation, the following requirements for
short-term storage apply:
• Store in a covered and dry location.
• Store the unit free from excessive cold or heat (below 32°F and above 110°F), dirt, and
vibration.
• Rotate the shaft by hand several times (10–15 turns) at least every 30 days.
For initial storage longer than three months, or for pump shut down after being in
operation longer than three months, contact your local sales and service representative
for long-term storage guidelines.
2 Transportation and Storage
10 G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL

3 Product Description
3.1 General description
Description
The pump is a centrifugal, frame-mounted pump. The following pump features make it
easy to install, operate, and service:
•High efficiency
• Rugged construction
• Compact design
• Foot-mounted volute
• Center drop out coupler
• regreasable bearings
• Horizontal split case
Mechanical seal types
Packing
Mechanical seal • Preferred over packing on some applications because of better sealing qualities and longer
serviceability.
• Leakage is eliminated when a seal is properly installed and normal life is much greater than
that of packing on similar applications.
• Pumps containing single mechanical seals normally utilize the pumped liquid to lubricate the
seal faces. This method is preferred when the pumped liquid is neither abrasive nor corrosive.
Intended applications
WARNING:
This product can expose you to chemicals including Lead, which is known to the State
of California to cause cancer and birth defects or other reproductive harm. For more
information go to: www.P65Warnings.ca.gov.
The pump’s bronze fitted construction make it ideal for use with the following liquids:
•Unheated domestic and fresh water
• Boiler feed water
• Condensate
• Hydronic cooling or heating
• Pressure boosting
• General pumping
• Benign liquids
3.2 Operational specifications
Maximum working pressure
The maximum working pressure is listed on the pump nameplate.
3 Product Description
G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL 11

Mechanical seal specifications
Seal type Parameter Value
Standard self-flushing pH range limits for BUNA pH 7–9
Liquid temperature range that
complies with the pH range limits for
BUNA
-20˚F to 225˚F (-29˚C to 107˚C)
pH range limits for EPT pH 7–11
Liquid temperature range that
complies with the pH range limits for
EPT
-20˚F to 250˚F (-29˚C to 121˚C)
Table notes
1. For use on closed or open systems which are relatively free of dirt and/or other
abrasive particles.
3.3 Nameplate information
The pump nameplate gives identification and rating information about the pump.
Permanent records for this pump are kept by the serial number and it must be used will all
correspondence and spare parts orders.
Nameplate
21 3 4 5 6
789
G&L PUMPS
1. Impeller diameter
2. Pump rotation — for example, LHR = left hand rotation
3. Pump size — for example, 8 x 8 x 17M
4. Serial number — for example, 1–21937–1–1
5. Driver HP
6. Identification number — for example, Month and year = CWP-11
7. Pump series and model number
8. Duty points — GPM, feet, RPM
9. Maximum working pressure
3 Product Description
12 G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL

4 Installation
4.1 Preinstallation
Precautions
WARNING:
• When installing in a potentially explosive environment, make sure that the motor is
properly certified.
• You must ground (earth) all electrical equipment. This applies to the pump equipment,
the driver, and any monitoring equipment. Test the ground (earth) lead to verify that it
is connected correctly.
• Motors without built-in protection must be provided with contactors and thermal
overload protection for single-phase motors, or starters with heaters for three-phase
motors. (See the nameplate on the drive unit to select properly-sized overloads.)
NOTICE:
Supervision by an authorized Xylem representative is recommended to ensure proper
installation. Failure to do so may result in equipment damage or decreased performance.
Evaluate the installation in order to determine that the Net Positive Suction Head Available
(NPSHA) meets or exceeds the Net Positive Suction Head Required (NPSHR), as stated by
the pump performance curve.
4.1.1 Pump location guidelines
WARNING:
Assembled units and their components are heavy. Failure to properly lift and support this
equipment can result in serious physical injury and/or equipment damage. Lift equipment
only at the specifically identified lifting points. Lifting devices such as eyebolts, slings, and
spreaders must be rated, selected, and used for the entire load being lifted.
Guideline Explanation/comment
Keep the pump as close to the liquid source as practically
possible.
If the pump is not on a closed system, locate the pump so
that the fewest number of bends or elbows in the suction
pipe are needed.
This minimizes the friction loss and keeps the suction
piping as short as possible.
Make sure that the space around the pump is sufficient. This facilitates ventilation, inspection, maintenance,
and service.
If you require lifting equipment such as a hoist or tackle,
make sure that there is enough space above the pump.
This makes it easier to properly use the lifting
equipment and safely remove and relocate the
components to a safe location.
Protect the unit from weather and water damage due to
rain, flooding, and freezing temperatures.
This is applicable if nothing else is specified.
Do not install and operate the equipment in closed systems
unless the system is constructed with properly-sized safety
devices and control devices.
Acceptable devices:
• Pressure relief valves
• Compression tanks
• Pressure controls
• Temperature controls
• Flow controls
If the system does not include these devices, consult
the engineer or architect in charge before you operate
the pump.
4 Installation
G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL 13

Guideline Explanation/comment
Take into consideration the occurrence of unwanted noise
and vibration.
The best pump location for noise and vibration
absorption is on a concrete floor with subsoil
underneath.
If the pump location is overhead, undertake special
precautions to reduce possible noise transmission.
Consider a consultation with a noise specialist.
Make sure there is a suitable power source available for the
pump driver.
The electrical supply must match the motor nameplate
specifications.
4.1.2 Typical installation
4
5
6
7
8
9
1
2
3
1. Compression tank (locate the compression tank on the suction side of the pump)
2. Air separator
3. Supply to system
4. Circuit setter
5. Triple duty valve
6. Isolation valve
7. From boiler chiller or converter
8. Cold water supply
9. Reducing valve
4.1.3 Foundation requirements
Requirements
• A substantial foundation and footing should be built to suit local conditions and form a
rigid support to maintain alignment.
• The foundation must be able to absorb any type of vibration and form a permanent,
rigid support for the unit.
• Pour the foundation without interruption to within 1/2 to 1–1/2 inches of the finished
height.
• The top surface of the foundation should be scored and grooved before the concrete
sets. This provides a bonding surface for the grout.
• Provide a flat, substantial concrete foundation in order to prevent strain and distortion
when you tighten the foundation bolts.
• Sleeve-type and J-type foundation bolts are most commonly used. Both designs allow
movement for the final bolt adjustment.
• Allow the foundation to cure for several days before you proceed with the pump
installation.
4 Installation
14 G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL

Diagram
• An optional 4–inch long tube around the bolts at the top of the concrete allows some
flexibility in bolt alignment to match the holes in the baseplate.
• Allow enough bolt length for grout, shims, lower baseplate flange, nuts, and washers.
2
4
1
3
5
1. Foundation bolt
2. Pipe sleeve
3. Washer
4. Built-up concrete foundation
5. Optional 4–inch tube around the bolts
4.1.4 Level the base on a concrete foundation
1. Place the pump on its concrete foundation.
2. Place 1.00 in./(25.40 mm) thick steel shims or wedges on both sides of each anchor
bolt in order to support the pump .
This also provides a means of leveling the base.
Add and remove shims under the base to level and plumb the pump shaft and flanges.
The baseplate does not have to be level.
4
1
5
2
3
6
7
1. Locate the shims to allow removal after grouting.
2. Grout only to top of base rail
3. Pump base rail
4. Grout
5. Concrete foundation
6. 1” (25.40 mm) Gap
7. Allow 1” for shims. Place on both sides of anchor bolts.
3. Draw anchor bolts tight against the base and observe pump and motor shafts or
coupling hubs for alignment.
Temporarily remove the coupling guard for checking alignment.
4. If the alignment needs improvement, add shims or wedges at appropriate positions
under the base so that retightening of anchor nuts shifts shafts into closer alignment.
Repeat this procedure until a reasonable alignment is reached.
A reasonable alignment is that which is agreed upon by the pump contractor and the
accepting facility. Final alignment procedures are covered in “Alignment procedures.”
4 Installation
G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL 15

5. Check to make sure that the piping can be aligned to the pump flanges without
placing pipe strain on either flange.
6. Grout the baseplate. See “Grout the baseplate.”
4.1.5 Grout the baseplate
Required equipment:
• Cleaners: Do not use an oil-based cleaner because the grout will not bond to it. See
the instructions provided by the grout manufacturer.
• Grout: Non-shrink grout is required.
1. Clean all the areas of the baseplate that will come into contact with the grout.
2. Build a dam around the foundation.
3. Thoroughly wet the foundation that will come into contact with the grout.
4. Pour grout through the grout hole into the baseplate up to the level of the dam.
When you pour the grout, remove air bubbles from it by using one of these methods:
– Puddle with a vibrator.
– Pump the grout into place.
5. After the grout has thoroughly hardened, check the foundation bolts and tighten if
necessary. Check alignment after tightening the bolts.
6. After the grout has dried, apply an oil base paint to the exposed edges to prevent
moisture from coming in contact with the grout.
4.2 Coupling alignment
WARNING:
Always disconnect and lock out power to the driver before you perform any installation or
maintenance tasks. Failure to disconnect and lock out driver power will result in serious
physical injury.
Alignment guidelines
Follow these guidelines when you align the coupling:
• Only perform alignment by moving or shimming the motor.
• Make allowances for thermal expansion during cold alignment so that the coupling is
aligned at operating temperature.
• Since adjustments in one direction can alter the alignment in another direction, check
the alignment in all directions after you make a correction.
• Make sure that the pump and motor bolts are tight when you take all measurements.
• Perform a final alignment check after the unit reaches its final operating temperature.
• Make final alignment by moving and shimming the motor on the baseplate until the
coupling hubs are within the recommended tolerances measured in total runout.
NOTICE:
Follow shaft alignment procedures in order to prevent catastrophic failure of drive
components or unintended contact of rotating parts. Follow the coupling or v-belt drive
installation and operation procedures from the coupling or v-belt manufacturer.
4.2.1 Prepare for alignment
1. Check the pump and motor shafts and remove any paint, burrs, and rust.
2. Slide the hubs and bushings on the shafts with keys.
3. Hold one half element on the hubs in order to determine the appropriate hub spacing.
4. If you use spacer elements with high speed rings, hold both half elements on the hubs
in order to make sure the hubs do not interfere with the rings.
5. You can install the hubs with the hub extension facing in or out.
4 Installation
16 G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL

Make sure the shaft extends into the hubs at least 0.8 times the diameter of the shaft.
6. Lightly fasten the hubs to the shafts in order to prevent them from moving during
alignment.
7. Align the hubs to the values shown in Maximum allowable misalignment for couplings.
You can perform alignment with lasers, dial indicators, or with a straight edge and
calipers.
4.2.2 Align the pump using a straight edge and calipers
For standard sleeve type coupler with black rubber insert
Before aligning the coupler, make sure there is at least 1/8” end clearance between the
sleeve and the two coupler halves.
1. Check the angular misalignment:
Tool Procedure
Calipers 1. Measure the outside of one flange to the outside of the opposite flange at four points 90°
apart. Do not rotate coupler. Misalignment of up to 1/64 per inch of coupler radius is
permissible.
Feeler
gauges
1. Insert feeler gauges between the coupling faces at various points around the circumference.
Do not rotate the shafts.
2. Reposition the equipment until the difference between the minimum and maximum
distance values is within the permissible range.
2. Check the parallel alignment:
a) Place a straight edge across the two coupler halves.
b) Measure the maximum offset at four points 90° apart. Do not rotate coupler.
c) Reposition the equipment until the gap is within the 1/64” permissible offset.
A coupling with a 3° angular misalignment will have a 0.191 in. (0.485 cm)
difference in measurements between L1 and L2. This is within the 0° to 4°
misalignment that is allowed for that size of coupling.
1
2
1. Straight edge
2. Feeler guage
Figure 4: Check the alignment using a straight edge - correct
1
2
Angular Parallel
1. Straight edge
2. Feeler gauge
Figure 5: Check the alignment using a straight edge - incorrect
4 Installation
G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL 17

In the following Figure, the arrows show the angular misalignment:
Figure 6: Check the alignment using calipers
4.2.3 Align the pump using a dial indicator
• Make sure that each hub is secured to its respective shaft and that all connecting
and/or spacing elements are removed at this time.
• The gap between the coupling hubs is set by the manufacturer before the units are
shipped. However, this dimension should be checked. Refer to the coupling
manufacturer’s specifications supplied with the unit.
1. Check the angular misalignment:
a) Mount the dial indicator base to one coupling half, or shaft.
b) Position the dial indicator button on the front face or rear face of the opposite
coupling half.
c) Mark the index lines on the coupling halves as the following Figure shows:
P
A
R
1
1
2
3
A Angular alignment
P Parallel alignment
1 Dial indicators
2 Index line
4 Installation
18 G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL