LUNA2Ｘ-PL
Suray Gun Operation Manual
Important: Read and follow all instructions and SAFETY PRECAUTIONS before using this equipment.
Keep this instruction manual carefully within close reach for reference at any time.
The gun body of this product is coated. Never use a wire brush or metal spatula when cleaning.
Also, do not attempt to engrave on the surface as this may cause the coating to peel off.

Models

LUNA2-K – Air Cap No. – Fluid Tip Size – Type of Feed （P： Pressure Type）(Ex.): LUNA2Ｘ– PL1 – FX – P (No. PL1 Air Cap – Size FX (1.1mm) – Pressure Type)SPECIFICATIONS

Maximum Working Air Pressure: 0.69Mpa,

Chart 1.
Air Cap No.
Part No.

Tip Size (mm)Maximum Working Fluid Pressure: 0.69MPa

FeedAir
Consumption

Pattern Size(mm)GY(0.8)FX(1.1)FF(1.4)

PL1○○○

Pressure
LVMP

205Nｌ/min

170

PL2○○

○

Pressure
LVMP

205NI/min

220

PL3○○

○

PressureStandard

240Nｌ/min

210

LUNA2-3-PL1
LUNA2-3-PL2
LUNA2-3-PL3

Applications

Fluid Inlet

Air Inlet

Weight(g)For GeneralIndustries

G1/4

G1/4265※PL1, PL2 / ●Spray Distance： 200mm ●Spray Pressure： 0.2Ｍｐａ ●Fluid Delivery： 200cc/min ●Paint Viscosity： 20sec（HIS） ●Size： FX※PL3 / ●Spray Distance： 200mm ●Spray Pressure： 0.29Ｍｐａ ●Fluid Delivery： 300cc/min ●Paint Viscosity： 20sec（HIS） ●Size： FX

Parts List

Chart 2.
Ref No.
123456789101112131415161718192021222324

Part No.
LUNA2i-6-BK
JJ-50-K5
See Chart 1.
See Chart 3.
LUNA2-7
LUNA-8-K5
LUNA2-35SUS
LUNA2-S-BODY
LUNA2-44
LUNA2-443
LUNA2i-43
FUN-25-K5
LUNA2-12
See Chart 3.
LUNA2i-14-K5
LUNA2-13-B
FUN-463
FUN-11-K3
FUN-46-K10
FUN-45-K5
FUN-108
LUNA2-42
LUNA2-30
LUNA2-34

DescriptionRetaining Ring
Ring Seat
Air Cap
Fluid Tip
Baffle (with Gasket)
Gasket (5 pcs.)
Fluid Inlet
Gun Body
Pattern Valve
Valve Seal Kit
Air Valve
Valve Spring (5 pcs.)
Air Valve Bushing
NeedleNeedle Spring (5 pcs.)
Needle Adjusting Screw
Needle Packing
Packing Gland (3 pcs.)
E-ring Kit (10 pcs.)
Bearing Stud (5 pcs.)
Trigger
Cheater Valve
Air Connector
Valve Seal Inserting Tool(Sold separately)

Qty

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Note: Ref. No. 24 (LUNA2-34) is needed for Ref. No. 10(LUNA2-443) installation. When removing it, be careful
not to damage the surface of seat where inserted. Adamaged seat may cause air leakage.
Chart 3.
Description
Size (mm)Fluid Tip

NeedleGY(0.8)

LUNA2-4-GY-S

LUNA2-41-GY

FX(1.1)

LUNA2-4-FX-S

LUNA2-41-FZ

FF(1.4)

LUNA2-4-FF-S

LUNA2-41-FZ

1

SAFETY PRECAUTIONSThis manual contains information that is important for you to know and understand.
This information relates to USER SAFETY and PREVENTING EQIPMENT PROBLEMS.
Read and follow SAFETY PRECAUTIONS before using this equipment.

FIRE AND EXPLOSION HAZARD
1. When spraying, adequate exhaust must be provided to keep air free of accumulations of flammable vapors which may
cause fire or explosion.
2. Smoking must never be allowed in the spray area.
3. Static electricity is generated and a static spark could be produced in the spray area. To prevent the risk of fire orexplosion, ground without fail all conductive objects in the spray area.
4. Make it sure to use and ground hoses with static wire for spray gun operation. If improperly grounded, a static spark
possibly produced may cause fire or explosion.
5. Fire extinguishing equipment must be provided in the spray area.
6. Solvents used for cleaning must have a flash point equal to or higher than that of the coating. Those for generalcleaning must have flash points above 37.8°C (100°F) to prevent the risk of fire.

INHALING TOXIC SUBSTANCES
1. Toxic vapors and liquids are harmful to health. When spraying, adequate exhaust must be provided to keep the air freefrom accumulations of toxic materials and in the use at all times of respiratory protective equipment must be setcompulsory.
2. Always wear eye protection when spraying or cleaning the equipment.
3. Certain materials may be harmful if contacted with the skin. Read all labels and safety performance data of thematerials and solvents to be used. Appropriate clothes and gloves must be worn for spraying or cleaning the equipment.

MISUSE
1. Operators should be given adequate and appropriate training in the safe use and maintenance of this equipment.
2. Pressured liquids may injure eyes. Do not point the spray gun to any person.
3. Gravity or suction feed gun must not be used for pressure feed gun.
4. Parts with compressed air may damage the human body. Connect air hoses tightly by using a spanner so that air neverleaks. If tightened loosely, hoses can be removed which may result in damaging the human body, objects to be coatedand other equipment used together.
5. Parts with compressed air or under spring pressure may injure the human body. When replacing such parts, clean thespray gun by discharging the materials, discharge the air, remove air hose and fluid cup and then replace such parts byplacing the gun flat. Eye protection must be worn when repairing the spray gun.
6. Do not use the gun above maximum working pressure (0.69MPa).

INSTALLATION
1. The air supplied to spray gun must be cleaned, in which any water, oil and solid material are removed. It isrecommended to set up the Mist Separator and Air Transformer near the gun. The use of air not cleaned may cause
coating troubles.
2. Connect fluid cup and air hoses tightly. If loose, hoses may disconnect, which may result in injuring the human body,
damaging objects to be coated and other equipments used together.
3. Adjust Needle Packing (17) before use of a brand new gun. Tighten the Packing Gland (18) gradually and adjust theneedle to move smoothly. Untighten until the Needle (14) is not well pulled back.

OPERATION
1. The recommended pressure of air supplied to gun is in a range of 0.24MPa~0.29MPa for conventional type, and0.15MPa～0.24MPa for LVMP type. Do not exceed the maximum working air pressure for proper usage (0.69MPa).
2. Try with the pressure starting from around 0.2MPa, as the spraying pressure varies depending upon the inner diameterof gun, triggering distance, and materials etc.
3. The recommended spray distance is 180mm. If the spray distance is too far, good results will not appear.
4. In order to get uniform finishing, the spray gun should be held vertically toward the painting surface.

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PREVENTIVE MAINTENANCE

1. Daily lubrication and cleaning are necessary to maintain the best condition of the gun.
2. To clean the gun body, wipe exterior with solvent dampened cloth. Do not submerge the gun body in solvent as anysolids may get into the air passage and cause troubles.
3. Do not leave the gun with solvent remained in the fluid cup. Clean the spray gun after use with clean solvent and by
emptying the cup. To clean the fluid cup after use, remove remaining paint through appropriate solvent and flush down
any residual paint.
4. The Air Cap can be immersed in solvent and brushed down for cleaning. If orifices are clogged, use a toothpick toremove obstruction. Never use a steel wire or hard instrument. This will damage Air Cap and result in a distorted spraypattern.
5. Do not immerse any plastic parts in solvent for long time.
6. Certain portions of gun should be lubricated. Do not lubricate to any portion where not instructed. For lubrication,
SSL-10 Gun Lube* is recommended (*Sold separately. Vegetable oil that does not repel paint materials).
7. The following portions should be lubricated regularly; Trigger Bearing Stud (20), Pattern Valve (9), threads of Cheater
Valve (22) and Adjusting Screw (16), Air Valve (11) stem, and portion of Packing Gland (18) where Needle (14) comes inand out.
8. When installing Air Cap (3), make sure no foreign materials adhered on Retaining Ring (1) and thread of Baffle (5).
Inject one drop of Gun Lube SSL-10.
9. Apply non-silicone grease lightly on Needle Spring (15) and Air Valve Spring (12). Do not apply too much grease as it
may clog the air passage.

REPLACEMENT OF PARTS
Before replacing gun parts, remove materials from the gun for cleaning. Then release the air pressure in the gun anddisconnect air hoses. All repairs should be made on a clean flat surface. Use only appropriate tools indicated forreplacement of parts.
Fluid Tip(4) and Needle(14)1. It is recommended to replace Fluid Tip (4) and Needle (14) as a set.
2. Loosen Pattern Valve (9) completely by turning the knob counterclockwise.
3. Remove Adjusting Screw (16) and Needle Spring (15) and then withdraw Needle (14) from the gun body.
4. Remove Retaining Ring (1) and Air Cap (3).
5. Remove Fluid Tip (4) by using 19mm socket wrench or offset wrench and Baffle (5) can also be removed.
6. When reassembling, it is recommended to replace Gasket (6) which is consumable.
7. Recommended torque of Fluid tip (4) is 15N・m.
Fluid Inlet (7) and Air Connector (23)
Fluid Inlet (7) and Air Connector (23) are fixed together with threadlocking adhesive. Use offset wrench for disassemblingand reassembling. When reassembling, apply threadlocking adhesive (Loctite 242, etc.) to threads of gun body.
Pattern Valve (9) and Cheetah Valve
When disassembling and assembling the pattern valve (9) and cheetah valve (22), loosen the knob fully counterclockwise
and then use a 13mm socket wrench or box wrench.
Valve Seal Kit (10), Air Valve (11), Valve Spring (12) and Air Valve Bushing (13)Valve Seal Inserting Tool (24) is required for replacing Valve Seal Kit (10). When replacing Valve Seal Kit (10), becareful not to damage the surface of seals of Gun Body (8), Air Valve Bushing (13) and Air Valve (11) to prevent airleakage.
1. Remove Needle Adjust Screw (16) and Needle Spring (15) and then withdraw Needle (14) from the Gun Body (8).
2. Remove Air Valve Bushing (13) by using 13mm offset wrench.
3. Withdraw Valve Spring (12) and Air Valve (11) from the gun body.
4. Withdraw Valve Seal Kit (10), being careful not to damage where fitted to.
5. Insert each seat by using Valve Seal Inserting Tool (24).
6. Insert Air Valve (11) to the bottom end, being careful not to damage the seat, and then insert Air Valve Spring (12).
7. Install Air Valve Bushing (13) by using offset wrench.
Needle packing (17)
1. Install Needle Packing (17) in the direction shown per drawing.
2. Adjust Needle Packing (17). Tighten the Packing Gland (18) gradually. To adjust the needle moving smoothly, untighten
a little where the Needle (14) is not well pulled back.

3

SERVICE CHECKNormal Spray Pattern

Problemwill not spray.

No pressure to Gun.

Cause

Correction
Check air and material lines.

Adjusting Screw (16) not properly adjusted.
Improper spray patterns A,B: Material build up on the Air Cap or Fluid Tip.
C,D: Incorrect fluid delivery or viscosity.
Breathing Phenomenon

Adjust.
A,B: Clean the Air Cap or Fluid Tip.
C,D: Adjust

Insufficient material in the cup or Loose connector. Fill cup or tighten the Connector.
Gun fluid passage plugged.

Clean.

Worn Needle Packing (17).

Replace.

Loose or damaged fluid tip (4).

Tighten or replace.

Paint leaking fromPacking Gland (18)

Loose Packing Gland (18).

Adjust Packing Gland (18).

Worn or damaged Needle Packing (17).

Replace.

Liquid leakage from
Fluid Tip (4)Worn or damaged Fluid Tip (4) or Needle (14).

Replace.

Stuck Needle Packing (17), or Needle (14)Lubricate.

Tight Packing Gland (18).

Adjust.

Loose Adjusting Screw (16).

Tighten.

ACCESSORIESPart No.

Description

Part No.

Description

DAH-10Air Hose set (10m)

HAV-503-B

Air Adjusting Valve with gauge

DPH-10-2

Paint Hose set (10m)

SSL-10Spray Gun Lube (60ml)

DTW-10Twin Hose set (10m)HD-505AT

Quick Cleaner (5L)

2024.04-LUNA2X-PL-E01

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