DÖRR EcoGun AS AUTO User manual

EcoGun AS AUTO
Automatic Air Spray Gun
MSG00019EN, V01
N36210008V
www.durr.com
Operation manual

Information about the document
This document describes the correct han-
dling of the product.
Read the document prior to every activity.
Prepare the document for the application.
Pass on the product only together with
the complete documentation.
Always follow safety instructions, han-
dling instructions and specifications of
every kind.
Illustrations can deviate from the tech-
nical construction.
Validity range of the document
This document describes the following
product:
N36210008V
EcoGun AS AUTO
Hotline and Contact
If you have queries or would like technical
information, please contact your dealer or
sales partner.
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TABLE OF CONTENTS
1 Product overview.......................... 4
1.1 Overview................................ 4
1.2 Short description.................... 4
2 Safety............................................. 5
2.1 Presentation of Notes............ 5
2.2 Intended Use.......................... 5
2.3 Staff qualification.................... 6
2.4 Personal protective equip-
ment....................................... 6
2.5 Residual risks......................... 6
3 Transport, scope of supply and
storage........................................... 7
3.1 Scope of delivery................... 7
3.2 Handling of
packaging material................. 7
3.3 Storage.................................. 7
4 Assembly....................................... 8
4.1 Requirements for the
Installation point..................... 8
4.2 Assembly............................... 8
4.3 Setting the spray jet............... 9
5 Commissioning........................... 10
6 Operation..................................... 12
6.1 Safety recommendations..... 12
6.2 Checks................................. 12
6.3 Selecting air cap.................. 12
6.4 Rinsing................................. 13
6.4.1 Safety recommendations.. 13
6.4.2 General notes................... 13
6.4.3 Rinsing.............................. 13
7 Cleaning and maintenance........ 13
7.1 Safety recommendations..... 13
7.2 Cleaning............................... 15
7.3 Maintenance........................ 16
7.3.1 Maintenance schedule...... 16
7.3.2 Lubrication........................ 16
8 Faults........................................... 16
8.1 Safety recommendations .... 16
8.2 Defects table........................ 17
8.3 Troubleshooting................... 20
8.3.1 Replace needle and
nozzle................................ 20
8.3.2 Replace needle seal......... 21
8.3.3 Replace piston and piston
seals.................................. 22
9 Disassembly and Disposal........ 23
9.1 Safety recommendations..... 23
9.2 Disassembly......................... 23
9.3 Disposal .............................. 24
10 Technical data............................. 24
10.1 Dimensions and weight...... 24
10.2 Connections....................... 24
10.3 Operating conditions.......... 24
10.4 Emissions........................... 24
10.5 Operating values................ 25
10.6 Type plate.......................... 25
10.7 Materials used.................... 25
10.8 Operating and auxiliary
materials............................ 25
10.9 Material specification......... 25
11 Replacement parts, tools and
accessories................................. 26
11.1 Replacement parts............. 26
11.2 Tools................................... 31
11.3 Accessories........................ 32
11.4 Order.................................. 38
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1 Product overview
1.1 Overview
Fig. 1: Product Overview
1 Leakage groove
2 Material flow control
3 Control air connection (C)
4 Spraying air connection (A)
5 Retaining bolt with angular gage
6 Material connection for paint circulation
mode
7 Housing
8 Cap nut
9 Air cap
10 Material connection (M)
11 Connector
12 Atomizer air control (R)
13 Horn air control (F)
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 operation can be done with paint
circulation or tap line.
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 therefore the result
Alignment of the air cap
The alignment of the air cap determines
the alignment of the spray jet.
Atomizer air pressure
The higher the atomizer air pressure, the
higher the atomizing and the finer the
spray jet
Horn air pressure
The higher the horn air pressure, the
more oval is the spray jet.
Control air pressure
Opens the needle and controls the mate-
rial outflow.
Material pressure
The higher the material pressure, the
higher the material flow
Product overview
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Control air pressure is controlled externally
via valves. The horn air pressure and
spraying air pressure can be adjusted on the
spray gun by means of the horn air pressure
(F) and the atomizer air control (R). The
spraying air pressure (A) is controlled exter-
nally via valves. You can also regulate the
material flow via the material flow control, if it
is not controlled externally.
2 Safety
2.1 Presentation of Notes
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.
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
Use
The EcoGun AS AUTO spray gun is solely
intended for automatic coating of surfaces by
one of the following operating methods:
as independent, not hand guided, device
as part of a semi- or fully automated paint
booth
as part of a paint robot
The material feed can be effected optionally
via the pressure line or under gravitation
(flow beaker).
The product is only intended for industrial
use within the specified technical data. Ä 10
“Technical data”
The spray gun is approved for use in explo-
sive areas of Ex zones 1 and 2.
Misuse
If used incorrectly, it can cause serious inju-
ries or death.
Misuses include, e. g.:
Aiming the spray gun at humans or ani-
mals.
Atomization of fluid nitrogen
Use of unapproved materials
Combination of the spray gun with com-
ponents that are not approved by Dürr
Systems for operation.
Making conversions or changes on your
own
Use in explosive areas Ex zone 0
EX labeling
II 2G T6 X
II - Device group II: all areas except
mining
2G - Device category 2 for gas
T6 - Temperature class T6: Surface tem-
perature, max. 85 °C
X - Specific conditions for safe operation
Safety
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The following conditions must be observed
for safe operation:
Ground spray gun and work piece.
Only use conductive lines.
Ensure that static electricity can be dis-
charged.
2.3 Staff qualification
WARNING!
Inadequate qualification
Wrong estimation of dangers can cause
serious injury or death.
– Only sufficiently qualified persons may
execute all work.
– Some work requires additional qualifi-
cation. Additional qualifications are
marked with a “+”.
This document is intended for qualified per-
sonnel in the industry.
Operator
The operator is trained specifically for the
field of work in which he works.
Furthermore, the operator possesses the fol-
lowing knowledge:
Technical Measures for occupational
safety and health
The operator is responsible for the following
work:
Operate and monitor the system/ product.
Introduce measures in the event of faults.
Clean system/ product.
+ additional qualification explosion pro-
tection
In addition to the knowledge of the various
specialist fields, the mechanic has knowl-
edge of regulations and safety measures
when working in potentially explosive areas.
Dürr Systems offers special product training
for Ä “Hotline and Contact”.
2.4 Personal protective equipment
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.
Before carrying out any work, ensure a
non-explosive atmosphere.
Do not use sources of ignition and open
light.
Do not smoke.
Ground the product.
Ground the work piece.
Only use conductive lines.
Flammable coating materials and their deter-
gents and cleaning agents can cause a fire
or an explosion.
Ensure that the flashpoint of the fluid is at
least 15 K above the ambient tempera-
ture.
Note explosion group of the fluid.
Follow safety data sheets.
Ensure that forced ventilation and fire
protection equipment are in operation.
Do not use any sources of ignition and
open light.
Do not smoke.
Danger from harmful or irritant sub-
stances
Contact with hazardous liquids or vapors,
can result in serious injury or death.
Safety
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Ensure that the forced ventilation is
operational.
Follow safety data sheets.
Wear specified protective equipment.
Escaping material
Material escaping under pressure can cause
serious injuries.
Before working on the product:
Disconnect the system with the product
from compressed air and material supply.
Relieve the lines.
Secure the system against reconnection.
Movable components
There is a risk of death if components or
equipment in the vicinity move unexpectedly.
Switch off and lock out all system compo-
nents against being switched on again
before working on the product.
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. Contact
with it can cause burns.
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 11.1 “Replacement parts”
Inspect delivery on receipt for completeness
and integrity.
Report defects immediately Ä “Hotline and
Contact”.
3.2 Handling of packaging material
ENVIRONMENT!
Incorrect disposal
Incorrectly disposed packaging material
can damage environment.
– Dispose of material no longer required
in an environment-friendly manner.
– Observe local disposal specifications.
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%
Transport, scope of supply and storage
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4 Assembly
4.1 Requirements for the
Installation point.
It must be possible to disconnect the
compressed air supply and material feed
to the spray gun and secure it against
reconnection.
Lines, seals and screw connections must
be designed to conform to the spray gun
requirements Ä 10.5 “Operating values”.
A fastening device capable of securing
the spray gun is required.
The control air supply must be adjustable.
4.2 Assembly
Stationary assembly
Personnel:
Operator
+ additional qualification explosion pro-
tection
Protective equipment:
Protective workwear
Protective gloves
Observe the following at assembly:
Bore of the retaining bolt: 10 mm
Nominal diameters: Ä 10.2 “Connections”
1. WARNING!
Sources of ignition may cause explo-
sions!
Ensure a non-explosive atmosphere.
Fig. 2: Assembly
2. Loosen screw (1) using a hexagon socket
screwdriver.
3. Slide the spray gun with the bore of the
fastening bolt (4) onto the support
bracket.
4. Tighten screw (1) using a hexagon socket
screwdriver.
5. Loosen locknut (3).
6. Set orientation angle by using angular
gage (2).
Alignment is not important. Dis-
tance to the work piece: 15 to
25 cm.
7. Tighten the locknut (3).
Assembly
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8. WARNING!
Statically charges components may
cause explosions during operation!
Ground the spray gun through the fas-
tening bore or material connection lines, if
the fastening device itself is non-conduc-
tive or is not grounded. Ensure housing
contract.
Resistance between housing and
grounding terminal ≤ 1 MΩ.
Fig. 3: Connect
9. The spray gun does not work
when the lines are not connected
correctly.
Connect lines. Ensure correct assign-
ment.
1 - Material (M)
2 - Spraying air (A)
3 - Control air (C)
Connect lines to both material
connections (M) for paint circula-
tion mode.
For tap line mode, connect line to
a material connection. Lock the
other material connection by
means of the sealing screw.
4.3 Setting the spray jet
Personnel:
Operator
+ additional qualification explosion pro-
tection
Protective equipment:
Protective workwear
Protective gloves
Fig. 4: Setting the spray jet
Assembly
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You can rotate the air cap (2) to any position
to change the alignment of the spray jet.
1. Loosen the cap nut (1).
Fig. 5: Air cap alignment
2. Rotate air cap (2) in the required position.
3. Hand tighten the cap nut (1).
5 Commissioning
Personnel:
Operator
+ additional qualification explosion pro-
tection
Protective equipment:
Use ear protection
Eye protection
Respiratory protection device
Protective workwear
Protective gloves
Depending on the design of the application
system, two technicians must be present to
execute the commissioning.
Technician 1: Operates the controls
Technician 2: Check on the spray gun.
1. Actuate the spray gun without material
via the control unit or the visualizer.
2. Check the switching behavior.
Does the needle open and close as
required?
Are all types of air supply connected?
3. Rinse spray gun. Ä 6.4 “Rinsing”
4. Connect material.
5. Create a trial spray pattern on a test work
piece.
Setting the spray pattern
Personnel:
Operator
+ additional qualification explosion pro-
tection
Protective equipment:
Use ear protection
Eye protection
Respiratory protection device
Protective workwear
Protective gloves
You can adjust the spray pattern continu-
ously between round and flat.
Commissioning
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You can vary the size of the spray
pattern by adjusting the distance
between the spray gun and the work
piece.
Fig. 6: Setting the spray pattern
1. Set material flow via valves in control
cabinet or at material flow control (1).
Open the material flow control on
the spray gun when controlling
via the regulation cabinet.
2. Set atomizer air using valves in the con-
trol cabinet or on the atomizer air control
(R) (3).
Observe the following character-
istic curve.
3. Set horn air using valves in the control
cabinet or on the horn air control (F) (2).
ðWhen the horn air is blocked, the
spray pattern is round.
Characteristic curve
Fig. 7: Characteristic curve
1 Flat spray pattern
2 Round spray pattern
X axis Atomizer air pressure [bar (psi)]
Y axis Flow rate [Nl/min (CFM)]
The characteristic curves show the relation
between atomizer air pressure and air con-
sumption when using the air caps PL and
HM with a diameter of 1.0 mm as well as the
air cap PC with the diameter 1.6 mm.
To achieve the highest possible transfer rate,
the air pressure should be kept as low as
possible Ä 6.3 “Selecting air cap”, Ä 10.5
“Operating values”.
Commissioning
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6 Operation
6.1 Safety recommendations
WARNING!
Danger of explosion due to chemical
reactions
Material, halogenated hydrocarbon-based
rinsing agent or cleaning agent can chemi-
cally react with aluminum components 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 halo-
genated 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 PL
The air cap PL is used for:
Topcoats
Automotive paints
Clear coats
Mordant
The air cap PL is used for the application of
paints with a viscosity up to about 25 s/Ford
Becher 4.
Air cap PC
The air cap PC is used for flammable and
non-flammable fluid coating materials (1-
component paints and 2-component paints).
It is used for application of fillers, base coats
and topcoats.
Air cap HM (HVLP)
The low mist air cap (HVLP) HM is used for:
Finish coat
Topcoats
Automotive paints
Transparent paints
Mordant
It is used for the application of paints with a
viscosity up to about 20 s/Ford Becher 4.
The air pressure at the gun inlet must not
exceed 1.8 bar (26 psi) to achieve the max-
imum material transfer rate (called HVLP
method). 1.8 bar (26 psi) at the gun inlet cor-
respond to 0.7 bar (10 psi) below the air cap.
HVLP Test-Set Ä 11.3 “Accessories”
Operation
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6.4 Rinsing
6.4.1 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 material
manufacturer.
6.4.2 General notes
When rinsing, use fluid to remove inner
soiling from components.
6.4.3 Rinsing
Personnel:
Operator
+ additional qualification explosion pro-
tection
Protective equipment:
Use ear protection
Eye protection
Respiratory protection device
Protective workwear
Protective gloves
The spray gun must be rinsed:
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.
1. Rinse the spray gun with an appropriate
rinsing agent until the rinsing agent runs
clean without any material residue.
7 Cleaning and maintenance
7.1 Safety recommendations
WARNING!
Danger of fire and explosion
Flammable coating materials and their
detergents and cleaning agents can cause
a fire or an explosion.
– Ensure that the flashpoint of the fluid is
at least 15 K above the ambient tem-
perature.
– Note explosion group of the fluid.
– Follow safety data sheets.
– Ensure that forced ventilation and fire
protection equipment are in operation.
– Do not use sources of ignition and
open light.
– Do not smoke.
WARNING!
Risk of injury from unsuitable replace-
ment parts in explosive areas.
Replacement parts not compliant with the
specifications of the ATEX guidelines can
cause explosions in an explosive atmos-
phere. Serious injuries and death can be
the consequence.
– Use exclusively original replacement
parts.
Cleaning and maintenance
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WARNING!
Danger to health from harmful or irri-
tant substances
Contact with hazardous liquids or vapors,
can result in serious injury or death.
– Ensure that the forced ventilation is
operational.
– Follow safety data sheets.
– Wear specified protective clothing.
WARNING!
Risk of injury due to escaping material
and compressed air
Escaping compressed material can cause
serious injury.
Before carrying out any work:
– Disconnect the system, in which the
spray gun is installed, from com-
pressed air and material supply.
– Secure the system against reconnec-
tion.
– Relieve the lines.
WARNING!
Danger of explosion due to chemical
reactions
Material, halogenated hydrocarbon-based
rinsing agent or cleaning agent can chemi-
cally react with aluminum components 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 halo-
genated hydrocarbons.
NOTICE!
Unsuitable cleaning agents
Unsuitable cleaning agents can damage
the product.
– Only use cleaning agents approved by
the material manufacturer.
– Follow safety data sheets.
– Place heavily soiled components in a
cleaning bath.
– Only place those parts in the
cleaning bath, which are suitable for
the cleaning bath.
– Use only electrically conductive
containers.
– Ground the container.
– Do not use ultrasound baths.
Use alcohols (isopropanol, butanol) for
non-flammable coating materials.
Remove dried non-flammable coating
materials using a material manufacturer-
approved organic thinner.
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 met-
allic 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
Clean the spray gun.
Personnel:
Operator
+ additional qualification explosion pro-
tection
Protective equipment:
Use ear protection
Eye protection
Respiratory protection device
Protective workwear
Protective gloves
1. Rinse spray gun. Ä 6.4 “Rinsing”
2. Use a cleaning agent to carefully clean
the spray gun. Dry with a soft cloth.
Cleaning the air cap und nozzle
For a thorough cleaning you can remove the
air cap and the nozzle.
Disassembly
Fig. 8: Disassemble needle.
1. Thread off and remove nozzle (4) with
end cap.
2. Remove needle spring (2) and plunger
spring (3).
3. Pull back complete needle (1) out of the
housing.
Fig. 9: Disassemble nozzle.
4. Loosen the cap nut (6).
5. Remove cap nut (6) and air cap (7).
6. Unscrew and remove the nozzle (5) with
an open-end wrench (SW10).
7. Clean air cap (7) using cleaning agent
and cleaning brush Ä 11.2 “Tools”.
8. Wipe the cleaned air cap (7) dry with a
cloth.
9. Clean nozzle (5) in the cleaning bath.
Assembly
10. Insert and tighten nozzle (5).
Tightening torque: 10 Nm
11. Fit the cap nut (6) and air cap (7).
12. Align air cap (7).
13. Hand tighten the cap nut (6).
14. Lubricate needle shank lightly with sili-
cone-free oil. Push in needle (1) care-
fully into the housing from the back.
15. Insert needle spring (2) and plunger
spring (3).
16. Hand tighten the end cap (4).
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. Maintenance intervals,
adjust individually if necessary.
Interval Maintenance work
Daily Check condition and tightness (also of the connections
and lines).
Check fastening
Before every change of material Cleaning Ä 7.2 “Cleaning”.
Monthly Lubricate internal components Ä 7.3.2 “Lubrication”.
After each alteration Check grounding Ä 4.2 “Assembly”.
7.3.2 Lubrication
Personnel:
Operator
+ additional qualification explosion pro-
tection
Protective equipment:
Protective workwear
Protective gloves
Needle shank, piston, piston sliding surfaces
and gasket must be lubricated so that there
will not be any leakages.
Fig. 10: Lubricating piston components
1. Feed a drop of lubricant (silicone-free oil)
at the control air connection (C) (1) using
the control air.
8 Faults
8.1 Safety recommendations
CAUTION!
Risk of injury due to spring tension
The end cap of the spray gun is under
spring tension. If you remove the end cap,
the spring tension could cause the end
cap to jump out unexpectedly and cause
light injuries.
– Removing and installing end cap
Faults
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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 deteri-
orates.
– Observe order of replacement steps
(needle – nozzle).
– Observe order of assembly steps
(nozzle – needle).
– Always replace nozzle and needle at
the same time.
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.
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.
Faults
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Spray pattern Fault identification
Spray jet is uneven.
Spray jet is sickle-shaped.
Fault description Cause Remedy
No material Line pinched or broken Check the line.
Needle does not open. Check control air.
Material leaking when
needle is closed.
Needle does not close
correctly.
Check control air venting.
Check operation of needle. Replace
needle, if defective, together with the
nozzle Ä 8.3.1 “Replace needle and
nozzle.”.
Nozzle soiled or defec-
tive.
Clean and check the nozzle. If nozzle is
defective, replace it along with the needle
Ä 8.3.1 “Replace needle and nozzle.”.
Air leaks from the
material flow control
Piston worn out Replace piston Ä 8.3.3 “Replace piston
and piston seals.”.
Air leak from the
leakage slot
Gasket worn out Have it replaced by Dürr Systems.
Material leaks from
the leakage-slot
Needle gland worn out Replace needle gland Ä 8.3.2 “Replace
needle seal”.
Spray jet misaligned Air cap is misaligned. Rotate air cap into the required position
Ä 4.3 “Setting the spray jet”.
Spray jet too strong in
center.
Too much material Reduce material feed.
Increase spraying air pressure (A).
Material too viscous. Change material consistency.
Horn air pressure too
low
Raise horn air pressure using the horn air
control (F).
Split spray jet Not enough material. Increase material feed.
Faults
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Fault description Cause Remedy
Reduce spraying air pressure (A).
Material too thin. Change material consistency.
Horn air pressure too
high
Raise horn air pressure using the horn air
control (F).
Cone-shaped spray
jet
Bores in air cap are
soiled.
Clean and check air cap Ä 7.2 “Cleaning”.
Replace air cap if defective Ä 8.3.1
“Replace needle and nozzle.”.
Nozzle soiled or defec-
tive.
Clean and check the nozzle Ä 7.2
“Cleaning”. If nozzle is defective, replace it
along with the needle Ä 8.3.1 “Replace
needle and nozzle.”.
Sickle-shaped spray
jet
Bores in air cap are
soiled.
Clean and check air cap Ä 7.2 “Cleaning”.
Replace air cap if defective Ä 8.3.1
“Replace needle and nozzle.”.
Nozzle soiled or defec-
tive.
Clean and check the nozzle Ä 7.2
“Cleaning”. 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 tightened.
Tighten cap nut and nozzle.
Uneven spray jet Nozzle soiled or defec-
tive.
Clean and check the nozzle Ä 7.2
“Cleaning”. If nozzle is defective, replace it
along with the needle Ä 8.3.1 “Replace
needle and nozzle.”.
Material pressure too
low.
Increase material pressure.
Feed line pinched or
broken.
Check the feed line.
Needle does not close
correctly.
Check control air.
Check operation of needle. Replace
needle, if defective, together with the
nozzle Ä 8.3.1 “Replace needle and
nozzle.”.
Cap nut or nozzle is
not properly tightened.
Tighten cap nut and nozzle.
Faults
06/2018 EcoGun AS AUTO - MSG00019EN 19/40

Fault description Cause Remedy
Needle seal worn out. Replace needle seal Ä 8.3.2 “Replace
needle seal”.
8.3 Troubleshooting
8.3.1 Replace needle and nozzle.
Personnel:
Operator
+ additional qualification explosion pro-
tection
Protective equipment:
Protective workwear
Protective gloves
Fig. 11: Disassembling Needle
Disassembly
1. Thread off and remove nozzle (4) with
end cap.
2. Remove needle spring (2) and plunger
spring (3).
3. Pull back complete needle (1) out of the
housing.
Fig. 12: Disassemble nozzle.
4. Loosen the cap nut (6).
5. Remove cap nut (6) and air cap (7).
6. Unscrew and remove the nozzle (5) with
an open-end wrench (SW10).
7. Replace worn out or defective compo-
nents.
Assembling
8. Insert and tighten nozzle (5).
Tightening torque: 10 Nm
Depending on the use case, use
a nozzle with a suitable diameter.
9. Fit the cap nut (6) and air cap (7).
10. Align air cap (7).
11. Hand tighten the cap nut (6).
Faults
06/2018EcoGun AS AUTO - MSG00019EN20/40