Grindex Mega INOX 8124.390 User manual

www.grindex.com
Installation, Operation, and Maintenance
Manual
8124.390/.400 Mega

Table of Contents
1 Introduction and Safety..................................................................................................... 3
1.1 Introduction.................................................................................... 3
1.2 Safety terminology and symbols.........................................................3
1.3 User safety......................................................................................4
1.4 Special hazards................................................................................4
1.4.1 Working in temporary installations................................................ 4
1.4.2 Biological hazards....................................................................... 4
1.4.3 Wash the skin and eyes............................................................... 5
1.5 Protecting the environment................................................................5
1.6 End of life product disposal................................................................ 5
1.7 Spare parts..................................................................................... 6
1.8 Warranty.........................................................................................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 Transportation guidelines...................................................................7
2.2.1 Precautions................................................................................ 7
2.2.2 Lifting....................................................................................... 7
2.3 Temperature ranges for transportation, handling and storage................. 8
2.4 Storage guidelines............................................................................8
3 Product Description.........................................................................................................10
3.1 Products included........................................................................... 10
3.2 Pump design.................................................................................. 10
3.3 Monitoring equipment..................................................................... 10
3.4 The data plate................................................................................11
3.5 Motor regulation.............................................................................11
4 Installation........................................................................................................................ 12
4.1 Precautions....................................................................................12
4.1.1 Hazardous atmospheres.............................................................12
4.2 Requirements.................................................................................12
4.3 Install........................................................................................... 13
4.4 Make the electrical connections........................................................ 14
4.4.1 General precautions.................................................................. 14
4.4.2 Grounding (earthing) ................................................................15
4.4.3 Prepare the SUBCAB™ cables...................................................... 16
4.4.4 Mount the steel hose at the cable entry........................................17
4.4.5 Connect the motor cable to the pump ......................................... 20
4.4.6 Cable charts............................................................................. 21
4.5 Check the impeller rotation: Pumps without built-in motor protection.... 24
5 Operation.......................................................................................................................... 26
5.1 Precautions....................................................................................26
5.2 Start the pump...............................................................................26
5.3 Clean the pump..............................................................................27
Table of Contents
8124.390/.400 Mega Installation, Operation, and Maintenance Manual 1

6 Maintenance..................................................................................................................... 28
6.1 Precautions....................................................................................28
6.2 Torque values.................................................................................29
6.3 Service..........................................................................................30
6.3.1 Inspection................................................................................30
6.3.2 Overhaul..................................................................................31
6.4 Change the oil................................................................................32
6.5 Replace the impeller....................................................................... 33
6.5.1 Remove the impeller: H............................................................. 33
6.5.2 Remove the impeller: N............................................................. 35
6.5.3 Install the impeller: H................................................................36
6.5.4 Install the impeller: N................................................................38
7 Troubleshooting............................................................................................................... 41
7.1 General precautions........................................................................ 41
7.2 Electrical troubleshooting.................................................................41
7.3 The pump does not start..................................................................41
7.4 The pump does not stop when a level sensor is used........................... 42
7.5 The pump starts-stops-starts in rapid sequence.................................. 43
7.6 The pump runs but the motor protection trips.....................................43
7.7 The pump delivers too little or no water.............................................44
8 Technical Reference........................................................................................................ 46
8.1 Application limits............................................................................ 46
8.2 Motor data.....................................................................................46
8.3 Specific motor data.........................................................................47
8.4 Dimensions and weights: Version code 390/400, N..............................48
8.5 Dimensions and weights: Version code 390/400, H..............................49
8.6 Performance curves: Version code 390.............................................. 50
8.7 Performance curves: Version code 400.............................................. 51
Table of Contents
2 8124.390/.400 Mega Installation, Operation, and Maintenance Manual

1 Introduction and Safety
1.1 Introduction
Purpose of the manual
The purpose of this manual is to provide the necessary information for working
with the unit. Read this manual carefully before starting work.
Read and keep the manual
Save this manual for future reference, and keep it readily available at the
location of the unit.
Intended use
WARNING:
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 and the surroundings. This includes any modification to the
equipment or use of parts not provided by Grindex. If there is a question
regarding the intended use of the equipment, please contact a Grindex
representative before proceeding.
Other manuals
See also the safety requirements and information in the original manufacturer's
manuals for any other equipment furnished separately for use in this system.
1.2 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
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.
1 Introduction and Safety
8124.390/.400 Mega Installation, Operation, and Maintenance Manual 3

Special symbols
Some hazard categories have specific symbols, as shown in the following table.
Electrical hazard Magnetic fields hazard
Electrical Hazard: CAUTION:
1.3 User safety
All regulations, codes, and health and safety directives must be observed.
The site
• Observe lockout/tagout procedures before starting work on the product, such
as transportation, installation, maintenance, or service.
• Pay attention to the risks presented by gas and vapors in the work area.
• Always be aware of the area surrounding the equipment, and any hazards
posed by the site or nearby equipment.
Qualified personnel
This product must be installed, operated, and maintained by qualified personnel
only.
Protective equipment and safety devices
• Use personal protective equipment as needed. Examples of personal
protective equipment include, but are not limited to, hard hats, safety
goggles, protective gloves and shoes, and breathing equipment.
• Make sure that all safety features on the product are functioning and in use at
all times when the unit is being operated.
1.4 Special hazards
1.4.1 Working in temporary installations
Certain industries, such as mining or construction, have a dynamic nature and
require temporary installation of equipment. Due to the rugged nature of these
applications, normal use of electrical equipment causes wear and tear that can
result in insulation breaks, short-circuits, and exposed wires. To maximize safety
when using the unit in rugged applications, the following conditions must be
met:
• If electrical cables must be located such that they are at risk of being run
over by heavy equipment, then provide mechanical protection to prevent
physical damage to the cables.
• Visually inspect electrical equipment before use. Remove from service any
equipment with exposed wires or visible damage.
• Use ground-fault circuit interrupters on all receptacles, or have an assured
equipment grounding conductor program.
1.4.2 Biological hazards
The product is designed for use in liquids that can be hazardous to your health.
Observe these rules when you work with the product:
• Make sure that all personnel who may come into contact with biological
hazards are vaccinated against diseases to which they may be exposed.
• Observe strict personal cleanliness.
1 Introduction and Safety
4 8124.390/.400 Mega Installation, Operation, and Maintenance Manual

WARNING: Biological Hazard
Infection risk. Rinse the unit thoroughly with clean water before working on it.
1.4.3 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.
1.5 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 Grindex if it has been exposed to nuclear radiation,
unless Grindex has been informed and appropriate actions have been agreed
upon.
1.6 End of life product disposal
Handle and dispose of all waste in compliance with local laws and regulations.
Correct disposal of this product — WEEE Directive on waste electrical and electronic
equipment
WS009973A
This marking on the product, accessories or literature indicates that the product
should not be disposed of with other waste at the end of its working life.
To prevent possible harm to the environment or human health from uncontrolled
waste disposal, please separate these items from other types of waste and
recycle them responsibly to promote the sustainable reuse of material resources.
Waste from electrical and electronic equipment can be returned to the producer
or distributor.
1 Introduction and Safety
8124.390/.400 Mega Installation, Operation, and Maintenance Manual 5

1.7 Spare parts
CAUTION:
Only use the manufacturer’s original spare parts to replace any worn or faulty
components. The use of unsuitable spare parts may cause malfunctions,
damage, and injuries as well as void the warranty.
1.8 Warranty
For information about warranty, see the sales contract.
1 Introduction and Safety
6 8124.390/.400 Mega Installation, Operation, and Maintenance 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.
2.2 Transportation guidelines
2.2.1 Precautions
DANGER: Crush Hazard
Moving parts can entangle or crush. Always disconnect and lock out power
before servicing to prevent unexpected startup. Failure to do so could result in
death or serious injury.
Position and fastening
The unit can be transported either horizontally or vertically. Make sure that the
unit is correctly fastened during transportation, and cannot roll or fall over.
2.2.2 Lifting
Always inspect the lifting equipment and tackle before starting any work.
WARNING: Crush Hazard
Always lift the unit by its designated lifting points.
Use suitable lifting equipment and ensure that the product is properly harnessed.
Wear personal protective equipment.
Stay clear of cables and suspended loads.
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8124.390/.400 Mega Installation, Operation, and Maintenance Manual 7

NOTICE:
Never lift the unit by its cables or hose.
2.3 Temperature ranges for transportation, handling and storage
Handling at freezing temperature
At temperatures below freezing, the product and all installation equipment,
including the lifting gear, must be handled with extreme care.
Make sure that the product is warmed up to a temperature above the freezing
point before starting up. Avoid rotating the impeller/propeller by hand at
temperatures below the freezing point. The recommended method to warm the
unit up is to submerge it in the liquid which will be pumped or mixed.
NOTICE:
Never use a naked flame to thaw the unit.
Unit in as-delivered condition
If the unit is still in the condition in which it left the factory - all packing
materials are undisturbed - then the acceptable temperature range during
transportation, handling and storage is: –50°C (–58ºF) to +60°C (+140ºF).
If the unit has been exposed to freezing temperatures, then allow it to reach the
ambient temperature of the sump before operating.
Lifting the unit out of liquid
The unit is normally protected from freezing while operating or immersed in
liquid, but the impeller/propeller and the shaft seal may freeze if the unit is lifted
out of the liquid into a surrounding temperature below freezing.
Follow these guidelines to avoid freezing damage:
1. Empty all pumped liquid, if applicable.
2. Check all liquids used for lubrication or cooling, both oil and water-glycol
mixtures, for the presence of unacceptable amounts of water. Change if
needed.
Water-glycol mixtures: Units equipped with an internal closed-loop cooling
system are filled with a mixture of water and 30% glycol. This mixture remains a
flowing liquid at temperatures down to –13°C (9°F). Below –13°C (9°F), the
viscosity increases such that the glycol mixture will lose its flow properties.
However, the glycol-water mixture will not solidify completely and thus cannot
harm the product.
2.4 Storage guidelines
Storage location
The product must be stored in a covered and dry location free from heat, dirt,
and vibrations.
NOTICE:
Protect the product against humidity, heat sources, and mechanical damage.
NOTICE:
Do not place heavy weights on the packed product.
Long-term storage
If the unit is stored for more than six months, then the following apply:
2 Transportation and Storage
8 8124.390/.400 Mega Installation, Operation, and Maintenance Manual

• Before operating the unit after storage, it must be inspected. Special
attention must be given to the seals and the cable entry.
• The impeller or propeller must be rotated every other month to prevent the
seals from sticking together.
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8124.390/.400 Mega Installation, Operation, and Maintenance Manual 9

3 Product Description
3.1 Products included
Pump model Standard Ex-proof MSHA Drainage Sludge
Mega INOX
8124.390
X X
Mega 8124.400 X X
3.2 Pump design
The pump is submersible, and driven by an electric motor.
Intended use
The product is intended for moving waste water, sludge, raw and clean water.
Always follow the limits given in Technical Reference on page 46. If there is a
question regarding the intended use of the equipment, then contact a sales or
authorized service representative before proceeding.
DANGER: Explosion/Fire Hazard
Special rules apply to installations in explosive or flammable atmospheres. Do
not install the product or any auxiliary equipment in an explosive zone unless it
is rated explosion-proof or intrinsically-safe. If the product is rated explosion-
proof or intrinsically-safe, then see the specific explosion-proof information in
the safety chapter before taking any further actions.
NOTICE:
Do NOT use the unit in highly corrosive liquids.
For information about pH, see Technical Reference on page 46.
Particle size
The pump can handle liquid containing particles that correspond to the holes in
the strainer.
Number of holes Hole dimensions
H: 867
N: 1905
10×10 mm (0.4×0.4 in)
Pressure class
N Medium head
H High head
Impeller type
Wear resistant
3.3 Monitoring equipment
The following applies to the monitoring equipment of the pump:
3 Product Description
10 8124.390/.400 Mega Installation, Operation, and Maintenance Manual

• The stator incorporates thermal contacts connected in series that activate the
alarm at overtemperature.
• The thermal contacts open at 125°C (257°F) and close at 95°C (203°F).
• The bearing temperature is also monitored by a Pt100 transducer sensor.
3.4 The data plate
Introduction
The data plate is a metal label located on the main body of the pump. The data
plate lists key product specifications.
The data plate
WS011380B
1 23
4
5
6
8791011121314
15
16
18
20
17
19
1. Pump type number
2. Frequency
3. Phases, type of current
4. Rated shaft power
5. Thermal class
6. WEEE-Directive symbol
7. Locked rotor code-letter
8. Country of origin
9. Maximum power consumption
10.Product weight
11.Maximum submersion depth
12.Degree of protection
13.Maximum capacity
14.Rated current
15.Direction of the start reaction
16.Direction of the impeller rotation
17.Maximum head
18.Serial number
19.Rated voltage
20.Pump model
3.5 Motor regulation
This product is submersible and therefore exempted from the motor efficiency
requirement, in accordance with EU commission regulation 2019/1781 Article
2(2)(e).
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8124.390/.400 Mega Installation, Operation, and Maintenance Manual 11

4 Installation
4.1 Precautions
Before starting work, make sure that the safety instructions have been read and
understood.
DANGER: Electrical Hazard
Before starting work on the unit, make sure that the unit and the control panel
are isolated from the power supply and cannot be energized. This applies to the
control circuit as well.
DANGER: Inhalation Hazard
Before entering the work area, make sure that the atmosphere contains
sufficient oxygen and no toxic gases.
4.1.1 Hazardous atmospheres
DANGER: Explosion/Fire Hazard
Special rules apply to installations in explosive or flammable atmospheres. Do
not install the product or any auxiliary equipment in an explosive zone unless it
is rated explosion-proof or intrinsically-safe. If the product is rated explosion-
proof or intrinsically-safe, then see the specific explosion-proof information in
the safety chapter before taking any further actions.
Authority regulation
Vent the tank of a sewage station in accordance with local plumbing codes.
4.2 Requirements
Sedimentation prevention
In order to avoid sedimentation when the pumped liquid contains solid particles,
the velocity of the liquid in the discharge line must exceed a certain value.
Choose applicable minimum velocity from the table, and choose proper
dimension of the discharge line accordingly.
Mixture Minimum velocity, meter per
second (feet per second)
Water + coarse gravel 4 (13)
Water + gravel 3.5 (11)
Water + sand, particle size <0.6 mm
(0.024 in)
2.5 (8.2)
Water + sand, particle size <0.1 mm
(0.004 in)
1.5 (4.9)
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For more permanent installations with a heavily contaminated pumped liquid, a
settling pump-sump is recommended.
WS001380B
Figure 1: Settling pump-sump
Fasteners
•Only use fasteners of the correct size and material.
• Replace all corroded or damaged fasteners.
• Make sure that all the fasteners are correctly tightened and that there are no
missing fasteners.
4.3 Install
The pump is transportable and intended to operate either completely or partially
submerged in the pumped liquid. The pump is equipped with a connection for
hose or pipe.
These requirements and instructions only apply when the installation is made
according to the dimensional drawing.
1. Run the cable so that it has no sharp bends, is not pinched, and cannot be
sucked into the pump inlet.
2. Connect the discharge line.
The discharge line can be run vertically or horizontally, but must be without
sharp bends.
3. Lower the pump into the sump.
The cable must not be used for this purpose. You should attach a rope or
similar to the handle or the eye bolts for lowering and lifting the pump.
Heavier pumps must be lifted and lowered down by crane. Suspend the pump
by the lifting handle or the eye bolts with chains or wires.
4. Place the pump on the base and make sure it cannot fall over or sink.
The base should consist of a plank, a bed of coarse gravel, or a cut-down and
perforated oil drum.
Alternatively, the pump can be suspended with a lifting chain just above the
sump bottom. Make sure that the pump cannot rotate at start-up or during
operation.
5. Connect the motor cable and the starter and monitoring equipment according
to the separate instructions.
Make sure that the impeller rotation is correct. For more information, see
Check the impeller rotation: Pumps without built-in motor protection on page
24.
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4.4 Make the electrical connections
4.4.1 General precautions
DANGER: Electrical Hazard
Before starting work on the unit, make sure that the unit and the control panel
are isolated from the power supply and cannot be energized. This applies to the
control circuit as well.
WARNING: Electrical Hazard
Risk of electrical shock or burn. A certified electrician must supervise all
electrical work. Comply with all local codes and regulations.
WARNING: Electrical Hazard
There is a risk of electrical shock or explosion if the electrical connections are not
correctly carried out, or if there is fault or damage on the product. Visually
inspect equipment for damaged cables, cracked casings or other signs of
damage. Make sure that electrical connections have been correctly made.
WARNING: Crush Hazard
Risk of automatic restart.
CAUTION: Electrical Hazard
Prevent cables from becoming sharply bent or damaged.
NOTICE:
Leakage into the electrical parts can cause damaged equipment or a blown fuse.
Keep the cable ends dry at all times.
Requirements
These general requirements apply for the electrical installation:
• If the pump will be connected to the public mains, then the supply authority
must be notified before installing the pump. When the pump is connected to
the public power supply, it can cause flickering of incandescent lamps when
started.
• The mains voltage and frequency must agree with the specifications on the
data plate. If the pump can be connected to different voltages, then follow
the specified voltage on the yellow sticker close to the cable entry.
• If the operation can be intermittent, such as S3 periodic duty, then the pump
must be supplied with monitoring equipment supporting such operation.
• The thermal contacts or thermistors must be in use.
Motor and short-circuit protection
A qualified electrician must select the size of motor protection breakers and
fuses, so that it is sufficient for the specific motor data such as rated current and
starting current.
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It is important that the short-circuit protection is not over-dimensioned. Over-
dimensioned fuses and motor protection breakers decrease the protection for the
motor.
• The fuse rating and the cables must be in accordance with the local rules and
regulations.
• The fuses and circuit breakers must have the correct rating. The pump
overload protection must be connected and set to the rated current. See the
data plate and if applicable the cable chart for the rated current. The starting
current in direct-on-line start can be up to six times higher than the rated
current.
Cables
These are the requirements to follow when you install cables:
• The cables must be in good condition, not have any sharp bends, and not be
pinched.
• The cables must not be damaged and must not have indentations or be
embossed (with markings, etc.) at the cable entry.
• The cable entry seal sleeve and washers must conform to the outside
diameter of the cable.
• The minimum bending radius must not be below the accepted value.
• If using a cable which has been used before, a short piece must be peeled off
when refitting it so that the cable entry seal sleeve does not close around the
cable at the same point again. If the outer jacket of the cable is damaged,
then replace the cable.
Contact a sales or authorized service representative.
• The voltage drop in long cables must be taken into account. The drive unit’s
rated voltage is the voltage measured at the cable connection point in the
pump.
• For SUBCAB® cables, the twisted pair copper foil must be trimmed.
• All unused conductors must be insulated.
4.4.2 Grounding (earthing)
Grounding (earthing) must be done in compliance with all local codes and
regulations.
DANGER: Electrical Hazard
All electrical equipment must be grounded (earthed). Test the ground (earth)
lead to verify that it is connected correctly and that the path to ground is
continuous.
WARNING: Electrical Hazard
If the power cable is jerked loose, then the ground (earth) conductor must be
the last conductor to come loose from its terminal. Make sure that the ground
(earth) conductor is longer than the phase conductors at both ends of the cable.
WARNING: Electrical Hazard
Risk of electrical shock or burn. You must connect an additional ground- (earth-)
fault protection device to the grounded (earthed) connectors if persons are likely
to come into contact with liquids that are also in contact with the pump or
pumped liquid.
Ground (earth) conductor length
The ground (earth) conductor must be 100 mm (4.0 in) longer than the phase
conductors in the junction box of the unit.
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4.4.3 Prepare the SUBCAB™ cables
This section applies to SUBCAB™ cables with twisted-pair control conductors.
The prepared SUBCAB™ cable The prepared screened SUBCAB™ cable,
without cable lugs
SUBCAB 1000V
T
1
T
2
12
34
5
6
WS004299E
1. T1+T2 twisted pairs in control element
2. Drain wire in control element (tinned copper strands) with
shrink tube
3. Aluminum and textile layers
4. Insulation jacket or plastic jacket, for the control element
5. Power conductors
6. Ground (earth) conductor with yellow-green shrink tube
WS004298F
Screened SUBCAB
1
5
6
7
8
2
9
3 4
1. T1+T2 and T3+T4 twisted pairs in control element
2. Drain wire in control element (tinned copper strands) with
shrink tube
3. Aluminum and textile layers
4. Insulation jacket or plastic jacket, for the control element
5. Power conductors
6. Plastic laminated aluminum foil, screen
7. Ground (earth) conductor with yellow-green shrink tube
8. Uncovered screen/braided wire
9. shrink tube
1. Peel off the outer jacket at the end of the cable.
2. Prepare the control element:
a) Peel the insulation jacket or plastic jacket.
b) Peel the aluminum and textile layers.
The aluminum foil is a conductive screen. Do not peel more than
necessary, and remove the peeled foil.
WS004313F
Screened SUBCAB
T
1T
2
T
3T
4
Figure 2: Aluminum foil on the control element.
c) Put a white shrink tube over the drain wire.
d) Twist T1+T2 and T3+T4.
e) Put a shrink tube over the control element.
Make sure that the conductive aluminum foil and drain wire are covered.
3. Prepare the ground (earth) conductor of the SUBCAB™ cable:
a) Peel the yellow-green insulation from the ground (earth) conductor.
b) Check that the ground (earth) conductor is at least 10% longer than the
phase conductors in the cabinet.
c) If applicable, put a cable lug on the ground conductor.
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4. Prepare the ground (earth) conductor of the screened SUBCAB™ cable:
a) Untwist the screens around the power conductors.
b) Twist all power conductor screens together to create a ground (earth)
conductor.
c) Put a yellow-green shrink tube over the ground (earth) conductor.
Leave a short piece uncovered.
d) Check that the connected ground (earth) conductor has sufficient slack.
The conductor must stay connected even if the power conductors are
pulled loose.
5. Prepare the power conductors:
a) Remove the aluminum foil around each power conductor.
b) Peel the insulation from each power conductor.
6. Prepare the ends of the ground (earth) conductor, the power conductors, and
the drain wire:
Connection type Action
Screw Fit cable lugs to the ends.
Terminal block Fit end sleeves or leave the ends as they are.
4.4.4 Mount the steel hose at the cable entry
Follow these instructions to mount the stainless steel hose over the cable.
A generic pump is shown in the figures.
1. Cut the steel hose to the correct length.
CAUTION: Cutting Hazard
Sharp edges. Wear protective clothing.
WS009742A
2. Fit the union nut and the clamp ring onto the hose.
The clamp ring should be as close to the end as possible.
WS009740A
12
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8124.390/.400 Mega Installation, Operation, and Maintenance Manual 17

1. Union nut
2. Clamp ring
3. Use the outer thread fitting and the union nut to flatten the end of the hose:
a) Place the steel hose so that the bottom rests on the upper surface of the
outer thread fitting.
Do not use a gasket at this point.
b) Using two wrenches, tighten the union nut on the outer thread fitting.
This will flatten the edge of the steel hose which protrudes under the
clamp ring.
x2
WS009739A
1
2
1. Union nut
2. Outer thread fitting
c) Remove the outer thread fitting.
WS009736A
4. Remove the sharp edge at the top end of the steel hose:
a) File the edge so that the opening of the hose is at the widest diameter.
WS009738A
b) Use a hammer to fold the new edge outwards and down.
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