Larius L400 Series User manual

Mist-less
manual
spraying gun
PAINT SPRAYING EQUIPMENT
www.larius.com
OPERATING AND MAINTENNANCE INSTRUCTIONS
ENGLISH
Ed. 004 - 01/2014
L400

manufacturing in Italy since 1969
Larius S.r.l, founded in 1969, designs and ma-
nufactures painting equipment, and transfer and
extrusion pumps.
Larius S.r.l is a company with a great industrial
tradition and an innovative technological culture.
Internal production, based on innovation and re-
search, is flexible to industry changes in order to
achieve the primary objective of creating value.
Larius S.r.l is the only leading Italian company in
the international market. The brand is distributed
worldwide, through an extensive network of distri-
butors and resellers, and is a guarantee of Total
Product Quality in the industrial, plastics, construc-
tion, wood and road marking sectors.
INVEST IN LARIUS
INVEST IN PRODUCTIVITY
Once again
a step ahead...
Each day we strive further
to satisfy your work
requirements
PAINT SPRAYING EQUIPMENT
www.larius.comwww.larius.com

MIST-LESS SPRAYING GUNS
MANUAL - AUTOMATIC
ADVANTAGE OF USE
The manual gun Mist-less L400 allows an easy control and
adjustment of the spraying range. To switch between Mist-less and
Mist-Clean 2 base you just need to replace the spraying coupling.
All guns, light and handy, are easy to clean and service. All parts
getting in contact with the product are made of stainless steel.
The automatic gun Mist-less L200 ensures the best performance
during the painting of metal and wood. All parts in contact with the
product are made of stainless steel in order to grant high resistan-
ce and long life over time. Components are easy to assemble and
disassemble during maintenance operations.
All guns offer the possibility to:
• open or close the product recirculation;
• choose between two products inlets (Mist-less / Mist-clean).
The two systems are fully interchangeable with no need to mo-
dify the body of the gun;
• provide quick couplings to speed up the connection of the gun
to the air hose;
• provide the high precision cap to adjust the opening of the pro-
duct flow.
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GUNS
Mist-less manual gun L400
for Mist-less tip
Code 21800
Mist-less manual gun L400
complete with Mist-Clean 2 base for Super Fast Clean
or Top spraying Clean tip
Code 21801
Mist-less automatic gun L200
with side inlets for Mist-less tip
Code 21340
Mist-less automatic gun L200
with side inlets complete with
Mist-Clean 2 base for Super Fast Clean
or Top spraying Clean tip
Code 21342
Mist-less automatic gun L201
with rear inlets for Mist-less tip
Code 21341
Mist-less automatic gun L201
with rear inlets complete with
Mist-Clean 2 base for Super Fast Clean
or Top spraying Clean tip
Code 21343
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RANGE
Airless spraying gun AT250
complete with Super fast Clean base
Code 11200
Airless gun PLA
cm 130 complete with Super
Fast Clean base
Code K11421
Automatic gun MA98L
low pressure
Code 11300
Airless spraying LA95
Automatic - high pressure
Code 11700
Gun RAC2
Automatic - low pressure
Code 14100
Airless spraying gun L91X
complete with Super fast Clean base
Code 11130
Airless spraying gun AT300
complete with Super fast Clean base
Code 11000
www.larius.com

Ed. 003 - 02/2013
ROUTINE MAINTENANCE .................................. p.17
REPLACE PRODUCT FILTER ......................... p.17
REPLACE PRODUCT GASKET ...................... p.18
REPLACE COUPLING GROUP....................... p.20
REPLACE AIR VALVE GASKET ...................... p.21
REPLACE BUSHING GASKET ....................... p.23
REPLACE PRODUCT HOUSE GASKET ........ p.24
MIST-LESS MANUAL GUN L400 ............................ p.26
SUPER FAST-CLEAN NOZZLE ........................... p.28
MIST-LESS NOZZLES.......................................... p.28
KIT AND SPARE PARTS ...................................... p.28
LONG FILTER MATERIAL HOSE KIT REF.21980 p.29
TROUBLESHOOTING ........................................... p.30
VERSIONS ........................................................... p.31
FOREWORD ........................................................ p.1
WARNINGS .......................................................... p.7
WORKING PRINCIPLE ........................................ p.8
TECHNICAL DATA ................................................ p.8
TRANSPORT AND UNPACKING ......................... p.9
SAFETY RULES ................................................... p.9
DESCRIPTION OF THE EQUIPMENT ................. p.10
FLUID INJECTION HAZARD ............................... p.12
PRESSURE DISCHARGING PROCEDURE........ p.12
EQUIPMENT MISUSE HAZARD .......................... p.13
HOSE SAFETY .................................................... p.13
FIRE OR EXPLOSION HAZARD ......................... p.13
MOVING PARTS HAZARD ................................... p.14
SETTING-UP ........................................................ p.14
OPERATION ......................................................... p.15
MIST-LESS GUN L400
MIST-LESS GUN L400
A
B
C
D
E
F
G
H
M
I
N
L
P
Q
R
S
T
U
V
O
Due to a constant product improvement programme, the factory reserves the
right to modify technical details mentioned in this manual without prior notice.
This manual is to be considered as an English language translation of the
original manual in Italian. The manufacturer shall bear no responsibility for any
damages or inconveniences that may arise due to the incorrect translation of
the instructions contained within the original manual in Italian.
WE ADVISE THE USE OF THIS EQUIPMENT ONLY BY PROFESSIONAL OPERATORS.
ONLY USE THIS MACHINE FOR USAGE SPECIFICALLY MENTIONED IN THIS MANUAL.
Thank you for choosing a LARIUS S.R.L. product.
As well as the product purchased,
you will receive a range of support services
enabling you to achieve the results desired,
quickly and professionally.
Z
www.larius.com
L400 SPRAYING GUN
6

Ed. 003 - 02/2013
FIRE AND EXPLOSION HAZARD
Solvent and paint fumes in work area can ignite or explode.
To help prevent fire and explosion:
- Use equipment ONLY in well ventilated area.
- Eliminate all ignition sources, such as pilot lights, cigarettes and plastic drop cloths (potential static arc).
- Ground equipment and conductive objects.
- Use only grounded hoses.
- Do not use trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or fluids containing such
solvents in pressurized aluminium equipment. Such use can cause serious chemical reaction and equipment rupture,
and result in death, serious injury, and property damage.
If electrical shocks or discharges are encountered the operation being carried out using the equipment must be stopped
immediately.
Keep a fire extinguisher at hand in the immediate vicinity of the work area.
WARNINGS The table below provides the meaning of the symbols used in this manual in relation to using, earthing,
operating, maintaining, and repairing of this equipment.
Read this operator’s manual carefully before using the equipment.
An improper use of this machine can cause injuries to people or things.
Do not use this machine when under the influence of drugs or alcohol.
Do not modify the equipment under any circumstances.
Use products and solvents that are compatible with the various parts of the equipment, and read the manufacturer’s warnings
carefully.
See the Technical Details for the equipment given in the Manual.
Check the equipment for worn parts once a day. If any worn parts are found, replace them using ONLY original spare parts.
Keep children and animals away from work area.
Comply with all safety standards.
It indicates an accident risk or serious damage to equipment if this warning is not followed.
It indicates important recommendations about disposal and recycling process of products in accordance with the environ-
mental regulations.
Report any risk of chemical reaction or explosion if this warning has not been given.
There is a risk of injury or serious lesion related to contact with the jet from the spray gun. If this should occur, IMMEDIATELY
contact a doctor, indicating the type of product injected.
Do not spray before the guard has been placed over the nozzle and the trigger on the spray gun.
Do not put your fingers in the spray gun nozzle.
Once work has been completed, before carrying out any maintenance, complete the decompression procedure explained in
this manual.
It reports any danger of electric shock if the warning and presence of live electrical parts has not been indicated.
Store in a dry place and do not expose to the rain.
Check that the cables are in good condition.
Switch off the equipment and discharge any electricity before cleaning or maintaining the equipment.
It indicates the presence of any clamps with earth cables.
Use ONLY 3-wire extension cords and grounded electrical outlets.
Before starting work make sure that the electrical system is earthed and that it complies with safety standards.
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L400 SPRAYING GUN
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Ed. 003 - 02/2013
A
INJECTION HAZARD
High-pressure fluid from gun, hose leaks, or ruptured components will pierce skin.
To help prevent injection, always:
- Engage trigger lock when not spraying.
- Do not put your hand over the spray tip. Do not stop or deflect leaks with your hand, body or other.
- Do not point gun at anyone or at any part of the body.
- Never spray without tip guard.
- Do pressure relief if you stop spraying or being servicing sprayer and before any maintenance operations.
- Do not use components rated less than sprayer Maximum Working Pressure.
- Never allow children to use this unit
- Brace yourself; gun may recoil when triggered.
If high pressure fluid pierces your skin, the injury might look like “just a cut”, but it is a serious wound! Get
immediate medical attention.
0
0 BAR 0 PSI
WORKING PRINCIPLE
MIST-LESS painting combines the qualities of airless technology
with those of low-pressure application providing superior quality
finishing with less material waste.
The MIST-LESSsprayguns allows:
- 15-35% product saving
- Overspray reduced to the minimum
- High quality finishing
The MIST-LESS sprayguns are equipped with a self-cleaning
nozzle with the following advantages:
- Reduced maintenance
- Long working life
- The nozzle does not have to be removed for cleaning, but simply
turned 180°, based on the same principle as Fast-Clean.
TECHNICAL DATA
B
*Available on request
PARTS OF THE SPRAY-GUN IN CONTACT WITH THE MATERIAL
Stainless steel AISI 420B, PTFE, Aluminium, Stainless Steel AISI
303, Tungsten carbide
MANUAL VERSION
Max operating pressure
Air inlet
Inlet port size
Weight
250 bar (3625 psi)
ø=8mm
STANDARD Gj 1/4" (M)
1/4" NPS (M)*
590 g
MIST-LESS GUN
187
147
240
It is obligatory to wear suitable clothing as gloves, goggles and face shield.
Wear clothing that complies with the safety standards in force in the country in which the equipment is used.
Do not wear bracelets, earrings, rings, chains, or anything else that may hinder the operator’s work.
Do not wear clothing with wide sleeves, scarves, ties, or any other piece of clothing that could get tangled up in moving
parts of the equipment during the work, inspection, or maintenance cycles.
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L400 SPRAYING GUN
8

Ed. 003 - 02/2013
C
D
TRANSPORT
AND UNPACKING
SAFETY RULES
• THE EMPLOYER SHALL TRAIN ITS EMPLOYEES ABOUT
ALL THOSE RISKS STEMMING FROM ACCIDENTS, ABOUT
THE USE OF SAFETY DEVICES FOR THEIR OWN SAFETY
AND ABOUT THE GENERAL RULES FOR ACCIDENT
PREVENTION IN COMPLIANCE WITH INTERNATIONAL
REGULATIONS AND WITH THE LAWS OF THE COUNTRY
WHERE THE PLANT IS USED.
• THE BEHAVIOUR OF THE EMPLOYEES SHALL STRICTLY
COMPLY WITH THE ACCIDENT PREVENTION AND ALSO
ENVIRONMENTAL REGULATIONS IN FORCE IN THE
COUNTRY WHERE THE PLANT IS INSTALLED AND USED.
The disposal of packaging materials is a customer’s
competence and must be performed in accordance
with the regulations in force in the country where
the plant is installed and used.
It is nevertheless sound practice to recycle packa-
ging materials in an environment-friendly manner
as much as possible.
• The manufacturer will not be responsible for the unloading
operations and transport to the workplace of the machine.
• Check the packing is undamaged on receipt of the equip-
ment.
Unpack the machine and verify if there has been any
damage due to transportation.
In case of damage, call immediately LARIUS and the
Shipping Agent. All the notices about possible damage or
anomalies must arrive timely within 8 days at least from
the date of receipt of the plant through Registered Letter
to the Shipping Agent and to LARIUS.
Read carefully and entirely the following instructions
before using the product.
Please save these instructions in a safe place.
The unauthorised tampering/replacement of one
or more parts composing the machine, the use of
accessories, tools, expendable materials other than
those recommended by the manufacturer can be
a danger of accident.
The manufacturer will be relieved from tort and
criminal liability.
• KEEP YOUR WORK PLACE CLEAN AND TIDY. DISORDER
WHERE YOU ARE WORKING CREATES A POTENTIAL
RISK OF ACCIDENTS.
• ALWAYS KEEP PROPER BALANCE AVOIDING UNUSUAL
STANCE.
• BEFORE USING THE TOOL, ENSURE THERE ARE NOT
DAMAGED PARTS AND THE MACHINE CAN WORK PRO-
PERLY.
• ALWAYS FOLLOW THE INSTRUCTIONS ABOUT SAFETY
AND THE REGULATIONS IN FORCE.
• KEEP THOSE WHO ARE NOT RESPONSIBLE FOR THE
EQUIPMENT OUT OF THE WORK AREA.
• NEVER EXCEED THE MAXIMUM WORKING PRESSURE
INDICATED .
• NEVER POINT THE SPRAY GUN AT YOURSELVES OR AT
OTHER PEOPLE . THE CONTACT WITH THE CASTING
CAN CAUSE SERIOUS INJURIES.
• IN CASE OF INJURIES CAUSED BY THE GUN CASTING,
SEEK IMMEDIATE MEDICAL ADVICE SPECIFYING THE
TYPE OF THE PRODUCT INJECTED. NEVER UNDERVA-
LUE A WOUND CAUSED BY THE INJECTION OF A FLUID.
• ALWAYS DISCONNECT THE SUPPLY AND RELEASE THE
PRESSURE IN THE CIRCUIT BEFORE PERFORMING ANY
CHECK OR PART REPLACEMENT OF THE EQUIPMENT .
• NEVER MODIFY ANY PART IN THE EQUIPMENT. CHECK
REGULARLY THE COMPONENTS OF THE SYSTEM. RE-
PLACE THE PARTS DAMAGED OR WORN.
• TIGHTEN AND CHECK ALL THE FITTINGS FOR CONNEC-
TION BETWEEN PUMP , FLEXIBLE HOSE AND SPRAY
GUN BEFORE USING THE EQUIPMENT.
• ALWAYS USE THE FLEXIBLE HOSE SUPPLIED WITH
STANDARD KIT. THE USE OF ANY ACCESSORIES OR
TOOLING OTHER THAN THOSE RECOMMENDED IN
THIS MANUAL, MAY CAUSE DAMAGE OR INJURE THE
OPERATOR.
• THE FLUID CONTAINED IN THE FLEXIBLE HOSE CAN
BE VERY DANGEROUS . HANDLE THE FLEXIBLE HOSE
CAREFULLY . DO NOT PULL THE FLEXIBLE HOSE TO
MOVE THE EQUIPMENT . NEVER USE A DAMAGED OR
A REPAIRED FLEXIBLE HOSE.
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L400 SPRAYING GUN
9

Ed. 003 - 02/2013
DESCRIPTION OF THE EQUIPMENT
E
POS.
1
2
3
4
Head
Locking ring nut
Safety lever
Gun body
Description
5
6
7
8
Gun air adjusting screw
Air inlet fitting
Trigger
Material inlet fitting
Description
POS.
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L400 SPRAYING GUN
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6
8
1
2
3
4
7

Ed. 003 - 02/2013
The high speed of the product in the hose can create
static electricity through discharges and sparks. It
is suggested to earth the equipment.
The pump is earthed through the earth cable of
the supply.
The gun is earthed through the high pressure
flexible hose.
All the conductors near the work area must be
earthed.
• NEVER SPRAY OVER FLAMMABLE PRODUCTS OR SOL-
VENTS IN CLOSED PLACES.
• NEVER USE THE TOOLING IN PRESENCE OF POTEN-
TIALLY EXPLOSIVE GAS.
Always check the product is compatible with the
materials composing the equipment (pump, spray
gun, flexible hose and accessories) with which it
can come into contact. Never use paints or solvents
containing halogen hydrocarbons (as the methy-
lene chloride).
If these products come into contact with aluminium
parts can provoke dangerous chemical reactions
with risk of corrosion and explosion.
IF THE PRODUCT TO BE USED IS TOXIC, AVOID IN-
HALATION AND CONTACT BY USING PROTECTION
GLOVES, GOGGLES AND PROPER FACE SHIELDS.
TAKE PROPER SAFETY MEASURES FOR THE
PROTECTION OF HEARING IN CASE OF WORK
NEAR THE PLANT.
• WHENEVER YOU STOP DISPENSING, EVEN FOR A MO-
MENT, ALWAYS SET THE GUN TRIGGER LOCK. FULLY
RELEASE THE TRIGGER AND ROTATE THE TRIGGER
LOCK FORWARD (see page 9).
• USE EXTREME CAUTION WHEN CLEANING OR CHAN-
GING THE FLUID NOZZLE. IF THE NOZZLE CLOGS
WHILE DISPENSING, FULLY RELEASE THE TRIGGER
IMMEDIATELY. ALWAYS FOLLOW THE PRESSURE RELIEF
PROCEDURE, BELOW, BEFORE WIPING OFF BUILD-UP
AROUND THE NOZZLE OR REMOVING THE NOZZLE TO
CLEAN IT.
• DO NOT POINT THE GUN UPWARDS DURING CLEANING
OPERATIONS.
• DO NOT USE METAL TOOLS TO CLEAN THE NOZZLES,
SINCE THEY MAY BE SCRATCHED AND CAUSE UNEVEN
SPRAYING.
• DO NOT RUB THE SPRAYGUN WITH CLOTHS SOAKED
IN SOLVENT.
• DO NOT IMMERSE THE SPRAYGUN IN SOLVENT.
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L400 SPRAYING GUN
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Ed. 003 - 02/2013
F
Never put hand or fingers over the nozzle.
Never wipe off build-up around the fluid nozzle until
pressure is fully relieved and the gun trigger lock
is engaged.
Never try to stop or deflect leaks with your hand
or body.
This is a high pressure dispensing gun.
Fluid dispensed under high pressure could
be injected through your skin and into your
body. This could cause extremely serious
injury, including the need for amputation.
Also, fluid injected or splashed into the eyes
or on the skin can cause serious damage.
FLUID INJECTION HAZARD
Always follow the Pressure Discharging Procedure, as hereby
described, before cleaning or removing the fluid nozzle or servicing
any system equipment.
PRESSURE DISCHARGING
PROCEDURE
To reduce the risk of serious injury, including fluid injection, splashing
in the eyes or on skin, always follow this procedure whenever the
dispensing equipment is shut off, when checking or servicing any
part of system, when installing, cleaning or changing nozzles and
whenever you stop dispensing.
• Fully release the gun trigger and set the gun trigger lock by
rotating the trigger lock forward.
MEDICAL ALERT – FLUID INJECTION WOUNDS
If any fluid appears to penetrate your skin, get EMERGENCY
MEDICAL CARE AT ONCE. DO NOT TREAT AS A SIMPLE CUT.
Tell the doctor exactly what fluid was injected.
Injection into the skin is a traumatic injury. It is
important to treat the injury surgically as soon as
possible. Do not delay treatment to research toxicity.
Toxicity is a concern with some exotic materials
injected directly into the blood stream. Consultation
with a plastic surgeon may be advisable.
• Shut off the supply pump.
• Hold a metal part of the gun firmly to the side of a grounded
metal waste container.
• Disengage the trigger lock
(G1) by rotating the trigger lock
backward. Trigger the gun to relieve fluid pressure.
• Fully release the gun trigger and set the gun trigger lock
(G1)
by rotating the trigger lock forward.
• Open the pump drain valve to help relieve fluid pressure in the
pump, hose, and gun. Triggering the gun to relieve pressure
may not be sufficient. Have a container ready to catch the
drainage.
• Leave the drain valve open until you are ready to dispense
again.
G
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L400 SPRAYING GUN
12
G1
Lock trigger
Unlock trigger

Ed. 003 - 02/2013
If you suspect that the nozzle or hose is clogged
or that pressure has not been fully relieved, after
following the steps above, very slowly loosen the
hose end coupling and relieve pressure gradually;
then loosen completely. Now clear the nozzle or
hose obstruction.
EQUIPMENT MISUSE HAZARD
Any misuse of the dispensing equipment or accessories, such as
overpressurizing, modifying parts, using incompatible chemicals
and fluids, or using worn or damaged parts, can cause them to
rupture and result in serious injury, including fluid injection and
splashing fluid in the eyes or on the skin, or in fire, explosion or
property damage.
The maximum working pressure of the gun is 110
bar. Do not exceed the maximum Working pressure.
HOSE SAFETY
High pressure fluid in the hoses can be very dangerous. If the hose
develops a leak, split or rupture due to any kind of wear, damage
or misure, the high pressure fluid emitted from it can cause a fluid
injection injury or other serious injury or property damage.
Be sure that all dispensing equipment and accessories are properly
rated to withstand the pressures developed by your system. Never
exceed the maximum working pressure of your gun model.
Be sure all fluids and solvents used are chemically
compatible with the “WETTED PARTS” shown in
the TECHNICAL DATA. Always read the fluid and
solvent manufacturer’s literature before using any
fluid or solvents in your system.
Before each use, check the entire hose for cuts,
leaks, abrasion, bulging cover, or damage or mo-
vement of the hose couplings.
• Do not try to recouple high pressure hose or mend it with
tape or any other device. A repaired hose cannot contain the
high pressure fluid.
• Handle and route hoses carefully.
• Tighten all fluid connections securely before each use. High
pressure fluid can dislodge a loose coupling or allow high
pressure fluid to be emitted from the coupling
• Never use a damaged hose. If any of these conditions exist,
replace the hose immediately.
Do not pull on hoses to move equipment.
Do not use fluids or solvents which are not com-
patible with the inner tube and cover of the hose.
Do not expose hose to extreme temperatures;
check with your hose supplier to determine tem-
perature tolerance.
Proper hose grounding continuity is essential to maintaining a
grounded dispensing system. Check the electrical resistance of your
fluid hoses at least once a week. If your hose does not have a tag
on it which specifies the maximum electrical resistance, contact the
hose supplier or manufacturer for the maximum resistance limits.
Use a resistance meter in the appropriate range for your hose to
check the resistance. If the resistance exceeds the recommended
limits, replace it immediately. An ungrounded or poorly grounded
fluid hose can make your system hazardous.
FIRE OR EXPLOSION HAZARD
Static electricity is created by the flow of fluid through the pump
and hose. If every part of the equipment is not properly grounded,
sparking may occur, and the system may become hazardous.
Sparks may also occur when plugging in or unplugging a power
supply cord. Sparks can ignite fumes from solvents and the fluid
being dispensed, dust particles and other flammable substances,
whether you are pumping indoors or outdoors, and cause a fire or
explosion, serious injury, and property damage.
H
I
L
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L400 SPRAYING GUN
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Ed. 003 - 02/2013
Do not plug in or unplug any power supply cords
in the dispensing area when there is any chance
of igniting fumes still in the air.
If you experience any static sparking or feel even
a slight shock while using this equipment, STOP
DISPENSING IMMEDIATELY. Check for proper groun-
ding of the entire system. Do not use the system
again until the cause of the problem is identified
and corrected.
Before flushing, be sure the entire system and
flushing pails are properly grounded. Refer to
GROUNDING, above. Always use the lowest possi-
ble fluid pressure, and maintain firm metal-to-metal
contact between the gun and grounded metal pail
during flushing to reduce the risk of fluid injection
injury, static sparking and splashing.
MOVING PARTS HAZARD
Moving parts can pinch or amputate your fingers or other body
parts. Keep clear of moving parts when starting or operating your
system.
Before checking or servicing the gun, pump, or any other system
component follow the PRESSURE DISCHARGING PROCEDURE
to prevent the pump from starting accidentally.
GROUNDING
To reduce the risk of static sparking, ground the pump and all
other equipment used or located in the dispensing area. Check
your local electrical code for detailed grounding instructions for
your area and type of equipment and be sure to ground all of the
following equipment.
• Pump: ground the pump by connecting a grounding wire from
the pump’s grounding lug to a true earth ground.
• Air compressor or hydraulic power supply: ground according
to local code and manufacturer’s recommendations.
• Fluid hoses: use only grounded hoses with a maximum of
150 mt. Combined hose length to ensure grounding continuity.
Refer to hose grounding continuity, above.
• Flo-gun: obtain grounding through connection a properly
grounded fluid hose and pump.
• Fluid supply container: according to local code.
• All solvent pails used when flushing: according to local code.
Use only metal pails. Do not place the pail on a non-conductive
surface, such as paper or cardboard, which interrupts the
grounding continuity.
• To maintain grounding continuity when flushing or relieving
pressure always hold a metal part of the gun firmly to the side
of a grounded metal pail, then trigger the gun.
SETTING-UP
CONNECT AIR HOSE
• Connect the flexible hose (N1) to the fitting of air gauge (N2)
of the pump.
• Connect the flexible hose (N1) to the fitting (N3) of the gun.
M
N
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L400 SPRAYING GUN
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N1
N2
N1
N3

Ed. 003 - 02/2013
CONNECT PRODUCT HOSE
• Connect the flexible hose for product delivery (N4) to the
fitting (N5) of the pump.
Tighten the nut (N6) with a suitable wrench (N7).
NEVER use sealants on fittings’ threads . It is recom-
mended to use the hose provided with the standard
kit. NEVER use a damaged or a repaired flexible hose.
• Connect the flexible hose of product delivery (N4) to the gun
(N8).
Tighten the nut (N9) with a suitable wrench (N7).
Fluid flow rate is controlled at the pump. Adjust the pump pressure
to obtain the desired flow rate; use lowest pressure necessary. The
pressure adjustment will depend on hose length, the viscosity of
the fluid, and the nozzle size. To dispense fluid with the gun, start
the supply pump, disengage the trigger lock, and squeeze the
trigger in all the way. Fluid flow begings with the slightest pressure
and stops when trigger is released.
OPERATION
To reduce the risk of serious injury, including fluid
injection or splashing in the eyes or on skin, always
follow the PRESSURE DISCHARGING PROCE-
DURE whenever the dispensing equipment is
shut off, when checking or servicing any part of
system, when installing or changing nozzles and
whenever you stop dispensing.
Always engage the trigger lock when the gun is not
in use to prevent accidental triggering of the gun.
O
• At this point, the product will flow until reaching the gun and
you can start working.
START OF THE PAINTING OPERATIONS
Before starting the pump it is important that a small
amount of atomizing air is sent to the spraygun.
• Use the equipment only after performing all the SETTING
UP operations described above.
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L400 SPRAYING GUN
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N7
N5 N4
N7
N4
Product
delivery hose
Air hose
N9
N8

Ed. 003 - 02/2013
NEVER point the spray gun at yourselves or at
other people. The contact with the casting can
cause serious injuries. In case of injuries caused
by the gun casting, seek immediate medical advice
specifying the type of the product injected.
Symmetrical trace of spraying a
fluid using air.
No tail-end is formed.
Trace of spraying a fluid at low-
pressure without using air.
ADJUSTING SPRAYING NOZZLE
• The spraying nozzle can be adjusted according to need by
setting the pump operating pressure and the atomization
pressure until reaching the required operating conditions.
• For proper spraying of the product, the air and paint coming
out of the gun must leave a spraying trace without tails.
• At this point, the product will flow until reaching the gun and
you can start working.
TRIGGER LOCK DISENGAGED
To disengage the trigger lock (O1), rotate the trigger lock back-
ward.
TRIGGER LOCK ENGAGED
To engage the trigger lock, release the trigger and rotate the
trigger lock (O1) forward.
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L400 SPRAYING GUN
16
A
B
O1
O2
Safety engaged Safety disengaged

Ed. 003 - 02/2013
ROUTINE MAINTENANCE
To reduce the risk of serious injury, including fluid injection or splashing the eyes or on the skin:
• Always follow the PRESSURE DISCHARGING PROCEDURE (see page 8) before checking, adjusting, cleaning
or repairing the gun or any part of the system.
• After adjusting or servicing the gun, if fluid does flow, the gun is not assembled properly or the trigger lock is
damaged. Reassembled the gun or return it to your nearest distributor. Do not use the gun until the problem
is corrected.
• When removing the gun from the hose, be sure to hold the inlet fitting securely to avoid loosening from the
gun body.
REPLACE PRODUCT FILTER
ATTENTION: for further details, please refer to the drawing on page 22
To replace the product filter, proceed as follows:
• Use the provided wrench (P1).
• Loose and remove the fitting (P2)
• Remove the product filter (P3) and replace it with a new one.
NOTE: should the filter be blocked, use the pliers to remove
it easily.
P
On first use of the gun check for any leaks of
product from the ring (P2).
• Insert the new filter (P3) as shown in the picture.
• Duly place the fitting in its seat (P2).
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L400 SPRAYING GUN
17
P1
P2
Product filter
P3

Ed. 003 - 02/2013
REPLACE PRODUCT GASKET
ATTENTION: for further details, please refer to the drawing on page 16
To replace the product gasket, proceed as follows:
• Unscrew the head (P4) .
• Holding down the trigger (P5) with your hand, unscrew the
coupling group (P6) with the provided wrench (P7).
• Use the provided wrench (P11) to unscrew the nut (P9) and
the pivot (P10) and disassemble the trigger (P8).
• Hold the nut (P12) with pointed pliers. (P13). Unscrew the
needle (P14) and remove the bushing (P15).
• During this operation, check the neddle (P14) and the nee-
dle tip (P16) whose surface shall not be damaged or worn.
Replace it, if necessary.
Pay attention to the direction of the bushing (P15)
in order to grant its correct positioning.
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L400 SPRAYING GUN
18
P4
P5
P7
P6
P8
P8
P9
P10 P11
P13
P14
P12
P12
P15
P14
P16

Ed. 003 - 02/2013
• Unscrew the gaskets group (P17) with the provided wrench
(P18) and replace the OR gasket (P19).
• Remove the O-ring (P20) and the gasket (P21) inside the
gaskets group.
During assembling, pay attention to the direction
of the gasket (P21) which should be placed with
the sealing lip facing inward (see picture below).
• Position the product gaskets group (P22) inside the gun,
making sure to lubricate the threads with grease.
• Place the needle (P23) inside the gun, making sure to lubricate
the surface with grease.
• Fasten the needle (P25) by using pointed pliers (P26).
P21
P20
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L400 SPRAYING GUN
19
P18
P19
P17
P22
P23
P21
P20

Ed. 003 - 02/2013
• Use the provided wrench (P30) to screw the nut (P28) and
the pivot (P29) and assemble the trigger (P27).
• Hold the trigger (P31) with your hand and unscrew the coupling
(P32) with the provided wrench (P33).
• Reassemble the head (P34) and the ring nut with the nozzle.
At this point the procedure for the gasket replacement is completed.
REPLACE THE COUPLING GROUP
ATTENTION: for further details, please refer to the drawing on page 22
To replace the coupling group, proceed as follows:
• Remove the ring nut (P35) .
• Hold the trigger (P36) with your hand, unscrew the coupling
group (P37) witht he provided wrench (P38) and replace with
a new spare part (P39).
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L400 SPRAYING GUN
20
P26
P25
P27
P28
P29 P30
P27
P31
P33
P32
P34
P35
P36
P38
P37
P39