Samoa LARIUS L400 User manual

Air assisted airless
manual spraying gun
L400
www.larius.com
REV. 02 - 02/2020
Cod. 150085
English
OPERATING INSTRUCTIONS

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L400
REV. 02 - 02/2020 - Cod. 150085
Larius S.r.l, founded in 1969, designs and manufactures 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 research, 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 distributors and resellers, and is a
guarantee of Total Product Quality in the industrial, plastics, construction, wood and road
marking sectors.
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.

L400
Air assisted airless manual gun
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WARNINGS ............................................................................................................................................................ p. 4
ADVANTAGE OF USE............................................................................................................................................. p. 5
VERSIONS.............................................................................................................................................................. p. 5
WORKING PRINCIPLE ........................................................................................................................................... p. 6
TECHNICAL DATA .................................................................................................................................................. p. 7
ATEX CERTIFICATE ................................................................................................................................................ p. 7
DIMENSION AND OVERALL .................................................................................................................................. p. 7
TRANSPORT AND UNPACKING ............................................................................................................................ p. 8
SAFETY RULES...................................................................................................................................................... p. 8
DESCRIPTION OF THE EQUIPMENT .................................................................................................................... p.10
FLUID INJECTION HAZARD .................................................................................................................................. p.11
PRESSURE DISCHARGING PROCEDURE............................................................................................................ p.11
EQUIPMENT MISUSE HAZARD............................................................................................................................. P. 12
HOSE SAFETY ....................................................................................................................................................... P. 12
FIRE OR EXPLOSION HAZARD ............................................................................................................................. p.12
MOVING PARTS HAZARD...................................................................................................................................... p.13
SETTING-UP .......................................................................................................................................................... p.13
OPERATION............................................................................................................................................................ p.14
ROUTINE MAINTENANCE
REPLACE PRODUCT FILTER........................................................................................................................... p.16
REPLACE PRODUCT GASKET ........................................................................................................................ p.17
REPLACE COUPLING GROUP..........................................................................................................................p.19
REPLACE AIR VALVE GASKET......................................................................................................................... p.20
REPLACE BUSHING GASKET ........................................................................................................................ p.22
REPLACE PRODUCT HOUSE GASKET .......................................................................................................... p.23
AIR ASSISTED AIRLESS MANUAL GUN L400 .......................................................................................................... p.26
SUPER FAST-CLEAN NOZZLE .......................................................................................................................... p.28
AIR ASSISTED AIRLESS NOZZLES ................................................................................................................... p.29
NOZZLES TOP SPRAYING CLEAN.................................................................................................................... p.29
BASE MIST-CLEAN 2......................................................................................................................................... p.29
KIT AND SPARE PARTS ......................................................................................................................................... p.29
LONG FILTER MATERIAL HOSE KIT ..................................................................................................................... p.30
TROUBLESHOOTING ............................................................................................................................................. p.31
GUN RANGE ......................................................................................................................................................... p.32
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AA
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.

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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.
WARNINGS
A
• 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 inuence 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.
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 uids 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.
- Do not form connections or switch light switches on or off if the air contains inammable fumes.
• If electrical shocks or discharges are encountered the operation being carried out using the equipment must be stopped immediately.
• Keep a re extinguisher at hand in the immediate vicinity of the work area.
• It indicates wound and nger squashing risk due to movable parts in the equipment.
• Tenersi lontano dalle parti in movimento.
• Do not use the equipment without the proper protection.
• Before any inspection or maintenance of the equipment, carry out the decompression procedure explained in this manual, and prevent
any risk of the equipment starting unexpectedly.
• Report any risk of chemical reaction or explosion if this warning has not been given.
• (IF PROVIDED) There is a risk of injury or serious lesion related to contact with the jet from the spray gun. If this should occur, IMME-
DIATELY contact a doctor, indicating the type of product injected.
• (IF PROVIDED) Do not spray before the guard has been placed over the nozzle and the trigger on the spray gun.
• (IF PROVIDED) Do not put your ngers in the spray gun nozzle.
• Once work has been completed, before carrying out any maintenance, complete the decompression procedure.
• It indicates important recommendations about disposal and recycling process of products in accordance with the environmental
regulations.
• Mark any clamps attached to 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.
• High-pressure uid from gun, hose leaks, or ruptured components will pierce skin.
• To help prevent injection, always:
- (IF PROVIDED) Engage trigger lock when not spraying.
- (IF PROVIDED) Do not put your hand over the spray tip. Do not stop or deect leaks with your hand, body or other.
- (IF PROVIDED) Do not point gun at anyone or at any part of the body.
- (IF PROVIDED) 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
- (IF PROVIDED) 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.
• 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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The manual gun Air assisted airless L400 allows an easy control and adjustment of the spraying range. To switch between Air assi-
sted airless 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 Air assisted airless L400 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 resistance 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 (Air assisted airless/Mist-clean). The two systems are fully interchangeable with no need
to modify 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 product ow.
ADVANTAGE OF USE
B
VERSIONS
C
Code Description
21800 L400 Air assisted airless manual gun.
21801 L400 Air assisted airless manual gun complete of Mist-clean (Base).
21802 L400 Air assisted airless manual gun with long filter.
21803 L400 Air assisted airless manual gun with long filter complete of Mist-clean (Base).
COD. 21800
COD. 21802
COD. 21801
COD. 21803

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AIR ASSISTED AIRLESS painting combines the qualities of airless technology with those of low-pressure application providing
superior quality
nishing with less material waste.
The AIR ASSISTED AIRLESS sprayguns allows:
• 15-35% product saving
• Overspray reduced to the minimum
• High quality nishing
The AIR ASSISTED AIRLESS 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.
WORKING PRINCIPLE
D
TECHNICAL CHARACTERISTICS
E
Maximum fluid pressure 250 bar (25 MPa)
Maximum working air pressure 7 bar (0,7 Mpa)
Guns body Alluminium
Maximum working fluid temperature 50° C
Wetted parts
stainless steel
carbide
polyethylene
chemically resistant fluoroelastomer
PTFE
Guns weight 590 g.
Air inlet 1/4” - tube 8x6
Fluid inlet Standard Gj 1/4’’
Alternative *Available on request: 1/4”NPS
Working pressures recommended for the air
Air atomization/reg. air fun 0,2 ÷ 1 bar (max)
D.a - ATEX CERTIFICATE

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187
147
240
F.a - Dimensions and overall l400 gun
DIMENSIONS AND OVERALL
F

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• 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 INTHE COUNTRY
WHERE THE PLANT IS INSTALLED AND USED.
• KEEP YOUR WORK PLACE CLEAN AND TIDY. DISORDER
WHERE YOU ARE WORKING CREATES A POTENTIAL RISK
OF ACCIDENTS.
• 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 equipment.
Unpack the machine and verify if there has been any damage
due to transportation.
I n case of damage, call immediately LARIUS and the Shipping
Ag ent. 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.
• ALWAYS KEEP PROPER BALANCE AVOIDING UNUSUAL
STANCE.
• BEFORE USING THE TOOL, ENSURE THERE ARE NOT
DAMAGED PARTS AND THE MACHINE CAN WORK PROPERLY.
• 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 UNDERVALUE 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. REPLACE
THE PARTS DAMAGED OR WORN.
• TIGHTEN AND CHECK ALL THE FITTINGS FOR CONNECTION
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.
Thedisposalofpackagingmaterialsisacustomer’s
competence and must be performed in accor-
dance with the regulations in force in the country
where the plant is installed and used.
It is nevertheless sound practice to recycle
packaging materials in an environment-friendly
manner as much as possible.
TRANSPORT AND
UNPACKING
SAFETY RULES
Read carefully and entirely the following instruc-
tions 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.
H
G

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• NEVER SPRAY OVER FLAMMABLE PRODUCTS OR SOLVENTS
IN CLOSED PLACES.
• NEVER USE THE TOOLING IN PRESENCE OF POTENTIALLY
EXPLOSIVE GAS.
• USE EXTREME CAUTION WHEN CLEANING OR CHANGING
THE FLUID NOZZLE. IF THE NOZZLE CLOGS WHILE DISPEN-
SING, 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 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
IF THE PRODUCT TO BE USED IS TOXIC, AVOID
INHALATION AND CONTACT BY USING PRO-
TECTION GLOVES, GOGGLES AND PROPER
FACE SHIELDS.
TAKE PROPER SAFETY MEASURES FOR THE
PROTECTION OF HEARING IN CASE OF WORK
NEAR THE PLANT.
DO NOT POINT THE GUN UPWARDS
DURING CLEANING OPERATIONS.
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.
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 sol-
vents containing halogen hydrocarbons (as the
methylene chloride).
If these products come into contact with alu-
minium parts can provoke dangerous chemical
reactions with risk of corrosion and explosion.
DO NOT IMMERSE THE SPRAYGUN IN SOLVENT.

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DESCRIPTION OF THE EQUIPMENT
I
Pos. Description
1 Head
2 Locking ring nut
3 Safety lever
4 Gun body
Pos. Description
5 Gun air adjusting screw
6 Air inlet fitting
7 Trigger
8 Material inlet fitting
8
1
3
4
5
7
2
6

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To reduce the risk of serious injury, including uid 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.
• Shut off the supply pump.
• Hold a metal part of the gun rmly to the side of a grounded
metal waste container.
• Disengage the trigger lock (K1) by rotating the trigger lock
backward. Trigger the gun to relieve uid pressure.
• Fully release the gun trigger and set the gun trigger lock (K1)
by rotating the trigger lock forward.
• Open the pump drain valve to help relieve uid pressure in the
pump, hose, and gun. Triggering the gun to relieve pressure may
not be sufcient. Have a container ready to catch the drainage.
• Leave the drain valve open until you are ready to dispense again.
Always follow the Pressure Discharging Procedure, as hereby
described, before cleaning or removing the uid nozzle or servicing
any system equipment.
MEDICAL ALERT – FLUID INJECTION WOUNDS
If any uid appears to penetrate your skin, get EMERGENCY
MEDICAL CARE AT ONCE. DO NOT TREAT AS A SIMPLE CUT.
Tell the doctor exactly what uid was injected.
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.
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. Consul-
tation with a plastic surgeon may be advisable.
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.
FLUID INJECTION HAZARD
J
PRESSURE DISCHARGING
PROCEDURE
K
K1
Lock trigger
Unlock trigger

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High pressure uid 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 uid emitted from it can cause a uid
injection injury or other serious injury or property damage.
• Tighten all uid connections securely before each use. High
pressure uid can dislodge a loose coupling or allow high
pressure uid to be emitted from the coupling
• Never use a damaged hose. If any of these conditions exist,
replace the hose immediately.
• 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 uid.
• Handle and route hoses carefully.
Proper hose grounding continuity is essential to maintaining a
grounded dispensing system. Check the electrical resistance of
your uid hoses at least once a week. If your hose does not have
a tag on it which species 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
uid hose can make your system hazardous.
Any misuse of the dispensing equipment or accessories, such as
overpressurizing, modifying parts, using incompatible chemicals
and uids, or using worn or damaged parts, can cause them to
rupture and result in serious injury, including uid injection and
splashing uid in the eyes or on the skin, or in re, explosion 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.
EQUIPMENT MISUSE
HAZARD
L
The maximum working pressure of the gun is
110 bar. Do not exceed the maximum Working
pressure.
HOSE SAFETY
M
Before each use, check the entire hose for cuts,
leaks, abrasion, bulging cover, or damage or
movement of the hose couplings.
Do not pull on hoses to move equipment.
Do not use fluids or solvents which are not
compatible with the inner tube and cover of
the hose.
Do not expose hose to extreme temperatures;
check with your hose supplier to determine
temperature tolerance.
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.
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 mnufacturer’s literature before using any
fluid or solvents in your system. Static electricity is created by the ow of uid 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 uid
being dispensed, dust particles and other ammable substances,
whether you are pumping indoors or outdoors, and cause a re
or explosion, serious injury, and property damage.
FIRE OR EXPLOSION HAZARD
N
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
grounding of the entire system. Do not use the
system again until the cause of the problem is
identified and corrected.

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CONNECT AIR HOSE
• Connect the exible hose (P1) to the tting of air gauge (P2)
of the pump.
• Connect the exible hose (P1) to the tting (P3) of the gun.
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 uid hose and pump.
• Fluid supply container: according to local code.
• All solvent pails used when ushing: 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 ushing or relieving
pressure always hold a metal part of the gun rmly to the side
of a grounded metal pail, then trigger the gun.
Moving parts can pinch or amputate your ngers 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.
Before flushing, be sure the entire system and
flushing pails are properly grounded. Refer to
GROUNDING, above. Always use the lowest
possible 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
O
SETTING UP
P
P1
P2
P1
P3

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• Connect the exible hose of product delivery (P4) to the gun
(P8) . Tighten the nut (P9) with a suitable wrench (P7) .
Fluid ow rate is controlled at the pump. Adjust the pump pressure
to obtain the desired ow rate; use lowest pressure necessary.
The pressure adjustment will depend on hose length, the viscosity
of the uid, and the nozzle size. To dispense uid with the gun,
start the supply pump, disengage the trigger lock, and squeeze
the trigger in all the way. Fluid ow begings with the slightest
pressure and stops when trigger is released.
• At this point, the product will ow until reaching the gun and
you can start working.
START OF THE PAINTING OPERATIONS
• Use the equipment only after performing all the SETTING UP
operations described above.
To reduce the risk of serious injury, including
fluid injection or splashing in the eyes or on skin,
always follow the PRESSURE DISCHARGING
PROCEDURE wheneverthe 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.
CONNECT PRODUCT HOSE
• Connect the exible hose for product delivery (P4) to the tting
(P5) of the pump. Tighten the nut (P6) with a suitable wrench (P7).
NEVER use sealants on fittings’ threads. It is
recommended to use the hose provided with the
standard kit. NEVER use a damaged or a repaired
flexible hose.
OPERATION
Q
Before starting the pump it is important that
a small amount of atomizing air is sent to the
spraygun.
Product delivery
hose
Air hose
P7
P4
P5 P6
P7
P4P9P8

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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 set-
ting 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 ow until reaching the gun and
you can start working.
TRIGGER LOCK DISENGAGED
To disengage the trigger lock (Q2), rotate the trigger lock backward.
TRIGGER LOCK ENGAGED
To engage the trigger lock, release the trigger and rotate the
trigger lock (Q1) forward.
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.
A
B
Safety engaged
Safety disengaged
Q2
Q1

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ROUTINE MAINTENANCE
R
• Remove the product lter (R3) and replace it with a new one.
NOTE: should the lter be blocked, use the pliers to remove it easily.
• Insert the new lter (R3) as shown in the picture.
• Duly place the tting in its seat (R2).
On first use of the gun check for any leaks of
product from the ring (R2).
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 11) before checking, adjusting, cleaning
or repairing the gun or any part of the system.
• After adjusting or servicing the gun, if uid does ow, 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 tting 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 lter, proceed as follows:
• Use the provided wrench (R1).
• Loose and remove the tting (R2)
R1
R2
R3
Product filter

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17
L400
REV. 02 - 02/2020 - Cod. 150085
REPLACE PRODUCT GASKET
ATTENTION: for further details, please refer to the drawing
on page 26
To replace the product gasket, proceed as follows:
• Unscrew the head (R4) .
• Holding down the trigger (R5) with your hand, unscrew the
coupling group (R6) with the provided wrench (R7).
• Use the provided wrench (R11) to unscrew the nut (R9) and the
pivot (R10) and disassemble the trigger (R8).
• Hold the nut (R12) with pointed pliers. (R13). Unscrew the needle
(R14) and remove the bushing (R15).
• During this operation, check the neddle (R14) and the needle
tip (R16) whose surface shall not be damaged or worn. Replace
it, if necessary.
Pay attention to the direction of the bushing (R15)
in order to grant its correct positioning.
R8
R8
R9
R10
R11
R4
R5
R7
R6
R13
R14
R12
R16
R15
R14
R12

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18
L400
REV. 02 - 02/2020 - Cod. 150085
• Unscrew the gaskets group(R17) with the provided wrench (R18)
and replace the OR gasket (R19).
• Remove the O-ring (R20) and the gasket (R21) inside the ga-
skets group.
• Position the product gaskets group (R22) inside the gun, making
sure to lubricate the threads with grease.
• Place the needle (R23) inside the gun, making sure to lubricate
the surface with grease.
During assembling, pay attention to the direction
of the gasket (R21) which should be placed with
the sealing lip facing inward (see picture below).
R21
R20
R18
R19
R17
R22
R23
R21
R20

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19
L400
REV. 02 - 02/2020 - Cod. 150085
• Use the provided wrench (R30) to screw the nut (R28) and the
pivot (R29) and assemble the trigger (R27).
• Hold the trigger (R31) with your hand and unscrew the coupling
(R32) with the provided wrench (R33).
• Reassemble the head (R34) and the ring nut with the nozzle.
At this point the procedure for the gasket replacement is com-
pleted.
REPLACE THE COUPLING GROUP
ATTENTION: for further details, please refer to the drawing on
page 26
To replace the coupling group, proceed as follows:
• Remove the ring nut (R35) .
• Hold the trigger (R36) with your hand, unscrew the coupling
group (R37) witht he provided wrench (R38) and replace with a
new spare part (R39).
At this point the procedure for the coupling group replacement
is completed.
Reassemble the gun following the previous procedure in reverse
order.
• Fasten the needle (R25) by using pointed pliers (R26).
R26
R25
R27
R28
R29 R30
R27
R34
R35
R36
R38
R37
R39
R31
R33
R32

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20
L400
REV. 02 - 02/2020 - Cod. 150085
REPLACE THE AIR VALVE GASKET
ATTENTION:for further details, please refer to the drawing
on page 26
To replace the air valve gasket, porceed as follows:
• Use the provided wrench (R41) to remove the rear cap (R42) and
the spring (R43) and (R44) .
• Use the provided wrench (R48) to unscrew the nut (R46) and the
pivot (R47) and disassemble the trigger (R45).
• Remove the air valve (R49) by using poined pointed pliers (R50).
• Remove the ring nut (R51) and the coupling (R52).
During this operation, make sure that the needle
is not damaged or worn (R40). If necessry, re-
place it as described in the previous paragraph
“Replace product gasket”.
R40 R39
R42
R41
R43 R44 R42
R45
R46
R47 R48
R45
R49
R50
R51
R52