DÖRR EcoGun 249 User manual

EcoGun 249
Manual Air Spray Gun Pressure-Feed
MSG00014EN, V01
N36200007V
www.durr.com
Operation manual

Information about the document
This document facilitates safe handling of
the product.
Read the document before beginning any
work.
The document must be kept readily
accessible and close to the place of use
for use in the future.
The document must be included if the
product is transferred.
Always follow specifications such as
instructions for use and safety tips.
Images are there to help general under-
standing and can differ from the actual
product.
Validity range of the document
This document describes the following prod-
ucts:
N36200007V
EcoGun 249
Hotline and Contact
If you have queries or would like technical
information, please contact your dealer or
sales partner.
12/2016
EcoGun 249 - MSG00014EN2/40

TABLE OF CONTENTS
1 Product overview.......................... 4
1.1 Overview................................ 4
1.2 Short description.................... 4
2 Safety............................................. 4
2.1 Explanation of symbols.......... 4
2.2 Intended Use.......................... 5
2.3 Staff qualification.................... 5
2.4 Personal protective equip-
ment....................................... 6
2.5 Residual risks......................... 6
3 Transport, scope of supply and
storage........................................... 6
3.1 Scope of delivery................... 6
3.2 Handling of
packaging material................. 7
3.3 Storage.................................. 7
4 Assembly....................................... 7
4.1 Requirements for the
Installation point..................... 7
4.2 Assembly............................... 7
5 Commissioning............................. 8
6 Operation....................................... 9
6.1 Safety recommendations....... 9
6.2 Checks................................... 9
6.3 Selecting air cap.................... 9
6.4 Changing the air cap............ 10
6.5 Alignment of the air cap....... 10
6.6 Guiding the spray gun.......... 11
6.7 Rinsing................................. 11
6.7.1 Safety recommendations.. 11
6.7.2 General notes................... 11
6.7.3 Rinsing spray gun............. 11
7 Cleaning and maintenance........ 12
7.1 Safety recommendations..... 12
7.2 Cleaning............................... 14
7.3 Maintenance........................ 15
7.3.1 Maintenance schedule...... 15
7.3.2 Lubrication........................ 15
8 Faults........................................... 15
8.1 Safety recommendations .... 15
8.2 Defects table........................ 17
8.3 Troubleshooting................... 19
8.3.1 Replace needle and
nozzle................................ 19
8.3.2 Replacing valve seal......... 21
8.3.3 Replacing needle gland
seal................................... 22
8.3.4 Set delay time................... 24
9 Disassembly and Disposal........ 25
9.1 Safety recommendations..... 25
9.2 Disassembly......................... 25
9.3 Disposal .............................. 26
10 Technical data............................. 26
10.1 Dimensions and weight...... 26
10.2 Connections....................... 26
10.3 Operating conditions.......... 26
10.4 Emissions........................... 26
10.5 Operating values................ 26
10.6 Compressed air quality...... 27
10.7 Type plate.......................... 27
10.8 Materials used.................... 27
10.9 Operating and auxiliary
materials............................ 27
10.10 Material specification.......... 27
11 Replacement parts, tools and
accessories................................. 27
11.1 Replacement parts............. 27
11.2 Tools.................................. 36
11.3 Accessories........................ 36
11.4 Order.................................. 38
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1 Product overview
1.1 Overview
Fig. 1: Overview
1 Air cap
2 Cap nut
3 Material connection
4 Flat jet control
5 Locknut
6 Material flow control
7 Air connection
8 Air control
9 Trigger
1.2 Short description
The spray gun is intended for surface
coating. Compressed air is used to apply
material. The coating material is fed through
lines. The spray gun is handheld.
Gun versions with LP air caps, LC air
caps, LG air caps and LE air caps and
non-adjustable nozzle needles are sup-
plied with a needle packing for materials
that have a low proportion of abrasive
ingredients. These gun versions are here-
after called standard version.
Gun versions with LS air caps and LE air
caps and adjustable nozzle needles are
supplied with a needle packing for mate-
rials that have a high proportion of abra-
sive ingredients (for example enamel,
glaze). These gun versions are hereafter
called ceramic version.
Use a suitable nozzle set with air cap,
depending on the requirement. Ä 6.3
“Selecting air cap”.
The following factors influence the spray jet
and the result:
Alignment of the air cap Ä 6.5 “Alignment
of the air cap”
Material flow Ä 5 “Commissioning”
Air pressure Ä 5 “Commissioning”
Horn air pressure Ä 5 “Commissioning”
The standard version of the spray gun uses
a self-adjusting needle packing. The needle
gland automatically regulates the material-
related wear of the needle gland seal. In
addition, the needle packing can be read-
justed mechanically.
2 Safety
2.1 Explanation of symbols
The following notes can appear in this
instructions manual.
DANGER!
High risk situation that can lead to serious
injuries or death.
WARNING!
Medium risk situation that can lead to
serious injuries or death.
Product overview
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CAUTION!
Low risk situations that can lead to minor
injuries.
NOTICE!
Situations that can lead to material
damage.
ENVIRONMENT!
Situations that can lead to environmental
damage.
Contains additional information
and recommendations.
2.2 Intended Use
The spray gun EcoGun 249 is used exclu-
sively for hand guided spraying coating of
surfaces. Compressed air is used to apply
material.
The material is fed via a pressure line.
The use is only permitted in the industrial
area within the specified technical data.
Ä 10 “Technical data”.
The atomizer is approved for use in explo-
sive areas of Ex zones 1 and 2.
Wrong Use
Wrong use of the spray gun entails a risk of
death.
Do not aim the spray gun at people or
animals.
Do not atomize liquid nitrogen.
Only use the spray gun with components
approved for the use by Dürr Systems.
Only use approved materials. Observe
the safety data sheets.
Do not attempt to make conversions or
changes on your own.
Do not use spray gun in areas with Ex
zone 0.
EX labeling
II 2G T60°C X
II - Device group II: all areas except
mining
2G - Device category 2 for gas
T60 °C - Surface temperature max. 60 °C
X - Specific operating conditions for
safe operation
The following conditions must be observed
for safe operation:
Ground spray gun and work piece.
Only use conductive air hoses.
Ensure that static electricity can be dis-
charged.
Use compressed air quick couplings
exclusively for water-based materials.
2.3 Staff qualification
WARNING!
Inadequate qualification
If you do not assess risks properly,
serious injury or death may result.
– All activities must be conducted
exclusively by people who possess
the proper qualifications.
This instructions manual is intended for
qualified personnel in the industry pos-
sessing at least the following knowledge:
Safe operation of application stations
Fundamentals of electrical engineering,
hydraulics and pneumatics:
Safe handling of the used material, oper-
ating and auxiliary materials
Training for operation, maintenance and
troubleshooting
Dürr Systems offers special product training
Ä “Hotline and Contact”.
Safety
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2.4 Personal protective equipment
When working in explosive areas, the per-
sonal protective equipment used must be
conductive.
Wear the required personal protective equip-
ment when working. Provide the following
personal protective equipment:
2.5 Residual risks
Explosion
Sparks, open flames and hot surfaces can
cause explosions in explosive atmospheres.
Serious injuries and death can be the conse-
quence.
Perform all maintenance away from
explosive atmospheres.
Do not use any sources of ignition and no
open light.
Do not smoke.
Ground the product.
Ground the work piece.
Only use conductive lines.
Use compressed air quick couplings
exclusively for water-based materials.
Flammable materials can cause a fire or an
explosion.
Ensure that the flashpoint of the cleaning
agent is at least 5 K above the ambient
temperature.
Pay attention to the explosion group of
the material, cleaning agent and rinsing
agent.
Ensure that forced ventilation and fire
protection equipment are in operation.
Do not use any sources of ignition and no
open light.
Do not smoke.
Follow safety data sheets.
Danger from harmful or irritant sub-
stances
Contact with hazardous liquids or vapors,
can result in serious injury or death.
Ensure that the forced ventilation is
operational.
Observe the safety data sheets.
Wear specified protective equipment.
Pressure
Material can escape with high pressure and
penetrate the body. Death or serious injuries
may result.
Before working on the product:
Disconnect the system with the product
from compressed air and material supply.
Secure the system against being
switched on again.
Relieve the lines.
Noise
The noise during normal operation may
cause severe hearing damage.
Wear hearing protection.
Do not spend more time then necessary
in the work area.
Hot surfaces
During normal operation the surfaces of
components can get extremely hot. Burn
injuries can happen on contact.
Before carrying out any work:
Check the temperature.
Do not touch hot surfaces.
Let components cool down.
Wear protective gloves.
3 Transport, scope of supply
and storage
3.1 Scope of delivery
The scope of supply includes the following
components:
Spray gun
Tool kit Ä 11.2 “Tools”
Transport, scope of supply and storage
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Inspect delivery on receipt for completeness
and integrity.
Report defects immediately Ä “Hotline and
Contact”.
3.2 Handling of packaging material
ENVIRONMENT!
Environmental damage due to wrong
disposal
Wrongly disposed packaging material
may not be re-used or recycled. It harms
the environment.
– Dispose of material no longer
required in an environment-friendly
manner.
– Observe local disposal specifica-
tions.
3.3 Storage
Requirements for the warehouse:
Do not store outdoors.
Store in a dry and dust-free place.
Do not expose to aggressive media.
Protect from solar radiation.
Avoid mechanical vibrations.
Temperature: 10 °C to 40 °C
Relative humidity: 35 % to 90 %
4 Assembly
4.1 Requirements for the
Installation point.
It must be possible to disconnect the
compressed air supply to the spray gun
against reconnection.
The compressed air supply must be
adjustable.
Lines, seals and screw connections must
be designed to conform to the spray gun
requirements Ä 10 “Technical data”.
The workplace must have a technical
ventilation.
Working environment and grounding
Flooring of the working areas must be anti-
static, according to DIN EN
50050-1:2014-03, measurement according
to DIN EN 1081:1998-04.
4.2 Assembly
Protective equipment:
Protective workwear
Protective gloves
1. WARNING!
Sources of ignition may cause explo-
sions!
Ensure a non-explosive atmosphere.
Fig. 2: Assembling
2. Connect lines. Ensure correct assign-
ment.
1- Material
2 - Atomizer air
For water-based materials,
you can also use compressed
air quick couplings.
Assembly
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5 Commissioning
Protective equipment:
Protective gloves
Safety boots
Protective workwear
Eye protection
Respiratory protection device
Use ear protection
Requirements:
Material hose and air hose have been
connected Ä 4.2 “Assembly”.
1. Rinse the spray gun before filling it with
paint Ä 6.7 “Rinsing”:
use solvent for solvent-based paints
use water for water-based paints
2. Create a trial spray pattern on a test work
piece.
Setting the spray pattern
Setting the material flow
Fig. 3: Setting the material flow
1. Set the material flow.
Loosen locknut (1).
Turn set screw (2) in required direc-
tion.
Right turn: less material
Left turn: more material
Tighten the locknut (1).
Do not turn the set screw up
to the mechanical stop. The
needle can then no longer
move properly.
If the material quantity cannot
be sufficiently reduced with
the material flow control,
reduce the total air pressure
or use a smaller nozzle set.
Set total air pressure
Fig. 4: Setting the total air and jet width
2. Set the total air pressure by turning the
total air control (2).
Right turn: Lower total air pressure
Left turn: higher total air pressure
Observe the following charac-
teristic curve.
Setting the horn air pressure
3. Set the horn air pressure by turning the
flat jet control (1).
Right turn: Flat jet minimum
Left turn: Flat jet maximum
You can turn the flat jet con-
trol continuously and adjust
the spray pattern from flat to
round jet.
Commissioning
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Characteristic curves
The characteristic curves show the air flow
rate for various nozzle sets and air caps for
different air pressures.
Fig. 5: Characteristic curve
1 Flat jet
2 Circular jet
LP Nozzle set with air cap LH
LC Nozzle set with air cap LA
X axis Atomizer air pressure and control air
pressure (psi)]
Y axis Flow rate [Nl/min (CFM)]
6 Operation
6.1 Safety recommendations
WARNING!
Danger of explosion due to chemical
reactions
Material, halogenated hydrocarbon-based
rinsing agent or cleaning agent can
chemically react with aluminum compo-
nents of the product. Chemical reactions
can cause explosions. Serious injuries
and death can be the consequence.
– Only use rinsing agents and
cleaning agents that do not contain
any halogenated hydrocarbons.
NOTICE!
Material damage due to dried material
residues
If material residues dry in the product,
that can harm components.
– Rinse product immediately after
each use.
6.2 Checks
1. Perform the following checks during oper-
ation:
Check air connection for correct seat
and leaks.
Check air car for cleanliness.
Check nozzle for cleanliness.
6.3 Selecting air cap
You can convert the spray gun for various
uses by swapping the air cap.
Air cap LP
The air cap LP is used for low viscosity (up
to 30 s/DIN cups, 4 mm) solvent-based
coating materials (single 1-component paints
and 2-component paints) and water-based
ones. It is used primarily for the final
painting.
Air cap LC
The air cap LC is used for solvent-based
coating materials (1-component paints and
2-component paints) and water-based ones.
It is used for application of fillers, basecoats
and topcoats. If usied with a hardened
nozzle, coating materials with abrasive addi-
tives (coating materials containing zinc and
aluminum) can be applied.
Air cap LE
The air cap LE is used for solvent-based
coating materials (1-component paints and
2-component paints) and water-based ones,
if higher outflow rates are required. Coating
materials with abrasive additives (coating
materials containing zinc and aluminum,
enamel, glaze) can also be applied.
Operation
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Air cap LS
The air cap LS is used for abrasive coating
materials such as enamel and glaze.
Air cap LG
The air cap LG is used for high outflow rates.
It is used for application of viscous, highly
viscous coating materials.
6.4 Changing the air cap
Protective equipment:
Protective workwear
Protective gloves
Removing the air cap
Fig. 6: Removing the air cap
1. Loosen cap nut (1).
2. Remove the air cap (1).
Assembling air cap
3. Place the air cap (1).
4. Align the air cap as required Ä 6.5
“Alignment of the air cap”.
5. Tighten cap nut (1).
6.5 Alignment of the air cap
Protective equipment:
Protective workwear
Protective gloves
The position of the air cap determines the
alignment of the spray pattern.
Fig. 7: Air cap alignment
1. Lightly loosen cap nut (2).
2. Turn the air cap (1) as required for the
desired spray pattern.
3. Tighten cap nut (2) by hand.
Operation
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6.6 Guiding the spray gun
Protective equipment:
Protective gloves
Safety boots
Protective workwear
Eye protection
Respiratory protection device
Use ear protection
Fig. 8: Guiding the paint gun
1. Guide the spray gun as follows:
Guide spray gun at 90 degrees to the
surface.
Maintain a distance of 15 to max.
25 cm to the surface.
The distance can vary for
effect coatings.
6.7 Rinsing
6.7.1 Safety recommendations
NOTICE!
Material damage due to unsuitable
rinsing agent
If the rinsing agent reacts chemically with
the components or the material, compo-
nents get damaged.
– Use only the rinsing agents that are
compatible with the components and
the material.
– Refer to safety data sheet of mate-
rial manufacturer.
6.7.2 General notes
When rinsing, use fluid to remove inner
soiling from components.
6.7.3 Rinsing spray gun
Protective equipment:
Use ear protection
Eye protection
Respiratory protection device
Protective workwear
Protective gloves
Rinsing spray gun:
After end of work
Before every change of material
Prior to cleaning
Prior to dismantling
Before a long time of non-use
Before placing in storage
Additional rinsing intervals
depend on the material used.
Preparation for rinsing
1. Disconnect the air hose from the spray
gun.
Fig. 9: Removing the air cap
2. Loosen cap nut (1).
Operation
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3. Remove the air cap (1).
Rinsing
4. Keep collecting tray ready.
Fig. 10: Rinsing spray gun
5. Keep the spray gun slightly at an angle
above the collecting tray, nozzle pointing
towards the ground.
6. Rinse the spray gun with an appropriate
rinsing agent through the material con-
nection (3), until the rinsing agent runs
clean without any material residue. Use a
brush to carefully clean the nozzle holes
(2).
7. Ensure proper disposal of the exiting
material and rinsing agent.
8. Connect the compressed air hose to the
spray gun.
9. Operate trigger lever until no more rinsing
agent flows out.
Final work
10. Place the air cap (1).
11. Tighten cap nut (1).
7 Cleaning and maintenance
7.1 Safety recommendations
WARNING!
Danger of fire and explosion
Flammable materials can cause a fire or
an explosion.
– Ensure that the flashpoint of the
cleaning agent is at least 5 K above
the ambient temperature.
– Pay attention to the explosion group
of the material, cleaning and rinsing
agent.
– Ensure that technical ventilation and
fire protection equipment are in
operation.
– Do not use any sources of ignition
and no open light.
– Do not smoke.
– Observe the safety data sheets.
WARNING!
Risk of injury from unsuitable replace-
ment parts in explosive areas.
Replacement parts not compliant with
the specifications of the ATEX guide-
lines can cause explosions in an explo-
sive atmosphere. Serious injuries and
death can be the consequence.
– Use exclusively original replacement
parts.
WARNING!
Danger from harmful or irritant sub-
stances
If you come in contact with hazardous liq-
uids or vapors, serious injury or death
can be the consequence.
– Ensure the technical ventilation is
operational.
– Observe the safety data sheets.
– Wear specified protective clothing.
Cleaning and maintenance
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WARNING!
Risk of injury due to escaping material
and compressed air
Material can escape with high pressure
and penetrate the body. The injury can
look like a harmless cut wound. Death or
serious injuries may result.
– If there are injuries, seek medical
attention immediately.
Before working on the product:
– Disconnect the system with the
product from compressed air and
material supply.
– Secure the system against recon-
nection.
– Relieve the lines.
WARNING!
Danger of explosion due to chemical
reactions
Material, halogenated hydrocarbon-based
rinsing agent or cleaning agent can
chemically react with aluminum compo-
nents of the product. Chemical reactions
can cause explosions. Serious injuries
and death can be the consequence.
– Only use rinsing agents and
cleaning agents that do not contain
any halogenated hydrocarbons.
CAUTION!
Risk of injury due to spring tension
The set screw of the spray gun is under
spring tension. If you remove the set
screw, the spring tension could cause the
set screw to jump out unexpectedly and
cause light injuries.
– Remove and install set screw.
NOTICE!
Material damage due to unsuitable
cleaning agent
Unsuitable cleaning agents can damage
the product.
– Only use suitable cleaning agents
approved by the material manufac-
turer.
– Observe the safety data sheets.
– Place heavily soiled components
into a cleaning bath.
– For cleaning baths, use only elec-
trically non-conductive con-
tainers.
– Do not use ultrasound baths.
Use alcohols (isopropanol, butanol) for
water-based paint.
Remove dried water-based paint residue
using a manufacturer approved thinner.
When cleaning with solvent, do not spray
into a closed container. An explosive gas-
air mixture can form inside closed con-
tainers.
NOTICE!
Damage due to unsuitable cleaning
tools
Unsuitable cleaning tools can damage
the product.
– Only use cloths, soft brushes and
paintbrushes.
– Do not use abrasive cleaning tools.
– Do not poke blocked nozzles with
metallic objects.
– Do not use compressed air for
cleaning.
– Do not use any thinner spray guns.
– Do not use high pressure for
cleaning agents.
Cleaning and maintenance
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7.2 Cleaning
Protective equipment:
Use ear protection
Eye protection
Respiratory protection device
Protective workwear
Protective gloves
1. Rinsing spray gun Ä 6.7 “Rinsing”.
2. Disconnect the material hose and air
hose from the spray gun.
3. Remove material residues with a cloth or
a soft brush.
4. Clean the spray gun carefully and dry it
with a soft cloth.
Cleaning the air cap und nozzle
Protective equipment:
Protective workwear
Protective gloves
For a thorough cleaning you can remove the
air cap and the nozzle.
Disassembly
Fig. 11: Disassembling the air cap and
nozzle
1. Loosen cap nut (1).
2. Remove the air cap (1).
3. Push trigger lever (3) through. Keep it
pressed.
ðThe needle is pushed backwards so
that it will not be damaged during dis-
assembly of the nozzle.
4. Unscrew nozzle (2) using monkey wrench
and remove.
5. Release trigger lever (3).
6. Clean air cap using cleaning agent and
cleaning brush Ä 11.2 “Tools”.
7. Wipe the cleaned air cap dry with a cloth.
8. Clean the nozzle in the cleaning bath.
9. Clean nozzle seat with a cloth or a soft
brush.
Assembling
10. Push trigger lever (3) through. Keep it
pressed.
ðThe needle is pushed backwards so
that it will not be damaged during
assembly of the nozzle.
11. Insert and tighten nozzle (2).
Tightening torque: 10 Nm
12. Release trigger lever (3).
13. Place the air cap (1).
14. Tighten cap nut (1).
Cleaning and maintenance
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7.3 Maintenance
7.3.1 Maintenance schedule
The maintenance intervals given below are based on experiential values. Adjust maintenance
intervals individually to increased requirements.
Interval Maintenance work
after each use Clean Ä 7.2 “Cleaning”.
daily Check condition and tightness of the spray gun and of the connections
and lines.
weekly Lubricate lever bearing Ä 7.3.2 “Lubrication”.
7.3.2 Lubrication
The following components must be lubri-
cated with a silicone-free grease:
O-rings and seals
Bearing
Set screw and threads
Needle gland
Lever bearing
Lubricate internal components at
the time of maintenance work,
which include disassembly of the
concerned components any way.
8 Faults
8.1 Safety recommendations
NOTICE!
Property damage due to improper
replacement of needle and nozzle
Replacing only the needle or only the
nozzle could damage spray gun compo-
nents. This can compromise the tightness
of the spray gun. The spray pattern dete-
riorates.
– Observe order of replacement steps
(needle – nozzle).
– Observe order of assembly steps
(nozzle – needle).
– Always replace nozzle and needle at
the same time.
Faults
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NOTICE!
Property damage due to improper han-
dling
Mechanical load can damage needle and
nozzle.
– Handle with care during installation
and dismantling.
– Do not subject the needle to any
mechanical pressure.
– Avoid collisions of components to be
assembled and disassembled with
the needle.
– Do not excessively tighten compo-
nents.
Faults
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8.2 Defects table
Visualizer of typical spray pattern problems
Spray pattern Fault identification
Spray jet is distorted.
Spray jet is bent or tapered.
Spray jet is too thick in the middle.
Spray jet is split.
Spray jet is uneven.
Fault description Cause Remedy
No Material Line pinched or
broken
Check the line.
Material escapes at the
needle gland seal.
Needle gland seal
worn out.
Replacing needle gland seal Ä 8.3.3
“Replacing needle gland seal”.
Needle gland loose. Tighten needle gland sensitively.
Air escapes at the flat jet
control.
Valve seal worn out. Replacing valve seal Ä 8.3.2
“Replacing valve seal”.
Spray jet is distorted. Air cap is misaligned. Rotate air cap into the required posi-
tion Ä 6.5 “Alignment of the air cap”.
Spray jet is bent or tapered. Bores in air cap are
soiled.
Clean and check air cap. Replace air
cap if defective Ä 7.2 “Cleaning”.
Faults
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Fault description Cause Remedy
Nozzle seat soiled. Cleaning the nozzle seat Ä 7.2
“Cleaning”.
Nozzle soiled or
defective.
Clean and check the nozzle. If nozzle
is defective, replace it along with the
needle Ä 8.3.1 “Replace needle and
nozzle.”.
Spray jet is too thick in the
middle.
Material too viscous. Change material consistency.
Horn air pressure too
low
Decrease the horn air pressure via the
flat jet control.
Air pressure too low. Increase the air pressure via the total
air control.
Spray jet is split. Material too thin. Change material consistency.
Horn air pressure too
high
Decrease the horn air pressure via the
flat jet control.
Air pressure too high. Decrease the air pressure via the total
air control.
Spray jet is uneven. The
spray pattern quality is bad.
Nozzle soiled or
defective.
Clean and check the nozzle. If nozzle
is defective, replace it along with the
needle Ä 8.3.1 “Replace needle and
nozzle.”.
Cap nut or nozzle is
not properly tight-
ened.
Tighten cap nut and nozzle
Ä “Cleaning the air cap und nozzle”.
Needle gland worn
out.
Replace needle gland Ä 8.3.3
“Replacing needle gland seal”.
Faults
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8.3 Troubleshooting
8.3.1 Replace needle and nozzle.
The disassembly and assembly
of needle for the common gun
version are described in the sec-
tion called “Standard version”.
The following versions of the gun
are disassembled and assem-
bled in a different manner.
– Spray gun with air cap LE
and hardened 2.8 mm
nozzle
– Spray gun with air cap LG
and hardened 4.0 mm
nozzle
Follow the relevant section.
Standard version
Protective equipment:
Protective workwear
Protective gloves
Disassembly
Fig. 12: Disassemble needle and nozzle
(standard version).
1. Loosen locknut (5).
2. Unscrew and remove set screw (6) with
the locknut (5).
3. Push trigger through.
ðThe needle (3) is pushed a little back-
wards and out from the housing.
4. Remove bearing and needle spring (4).
5. Remove the needle (3).
6. Loosen cap nut (1).
7. Remove the air cap (1).
8. Unscrew nozzle (2) using monkey wrench
and remove.
9. Replace worn out or defective compo-
nents.
Assembling
10. Insert and tighten nozzle (2).
Tightening torque: 10 Nm
11. Place the air cap (1).
12. Tighten cap nut (1).
13. Push in needle (3) carefully into the
housing.
14. Push needle spring and bearing (4) on
the needle.
15. Set and screw-in set screw (6) with the
locknut (5).
16. Tighten locknut (5).
Faults
12/2016 EcoGun 249 - MSG00014EN 19/40

Version with air cap LE and hardened 2.8
mm nozzle / air cap LG and 4.0 mm
nozzle.
Protective equipment:
Protective workwear
Protective gloves
Disassembly
Fig. 13: Disassemble needle and nozzle.
1. Loosen locknut (4).
2. Unscrew and remove set screw (5) with
the locknut (4).
3. Remove bearing and needle spring (3).
4. Loosen cap nut (1).
5. Remove the air cap (1).
6. Unscrew nozzle (2) using monkey wrench
and remove.
Fig. 14: Disassemble needle.
7. Secure needle (7) on the wrench mount
in the center of the spray gun using the
monkey wrench before twisting.
8. Loosen the needle tip (6) using an instal-
lation wrench.
9. Push trigger through.
ðThe needle (7) is pushed a little back-
wards and out from the housing.
10. Remove the needle (7).
11. Replace worn out or defective compo-
nents.
Assembling
12. Push in needle (7) carefully into the
housing.
13. Secure needle (7) on the wrench mount
in the center of the spray gun using the
monkey wrench before twisting.
14. Insert needle tip (6). Tighten using the
installation wrench.
15. Insert and tighten nozzle (2).
Tightening torque: 10 Nm
16. Place the air cap (1).
17. Tighten cap nut (1).
18. Push needle spring and bearing (3) on
the needle.
Faults
12/2016EcoGun 249 - MSG00014EN20/40