LUNA2Ｘ (Cross series)
Spray 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

LUNA2X – B – Fluid Tip Size Type of Feed （G: Gravity type / S: Suction type）(Ex.): LUNA2Ｘ–B–13G (Air Cap 254 & 244PLS - Size 1.3mm – Gravity)

SPECIFICATIONS
Chart 1.

Maximum Working Air Pressure: 0.69Mpa, Maximum Working Fluid Pressure: 0.69MPa*Using air pressure of 0.2MPa or higher may cause pattern abnormality “mid-cracking”.

Air Cap No.
Part No.

254

LUNA2i-3-254
Option244PLS

Tip size (mm)Feed1.3/1.5/1.8(G)1.3/1.5/1.8(S)

LUNA2-3-244PLS

255

LUNA2i-3-255
Option245PLS

1.3/1.5/1.8(G)1.3/1.5/1.8(S)

LUNA2-3-245PLS

246PLSLUNA2-3-246PLS
Option255

G ： Gravity
type
S ： Suctiontype

1.5/1.8(G)1.5/1.8(S)

LUNA2i-3-255

Air consumption
gun inletpressure
191L/min
0.15MPa
200L/min
0.15MPa
182L/min
0.15MPa
220L/min
0.15MPa
200L/min
0.15MPa
182L/min
0.15MPa

Pattern size

Applications

280mm

Base
Thin flat
BaseStandard flat
Clear
Thin arch
Clear
Standard arch

(Tip size 1.3)

240mm

(Tip size 1.3)

290mm

(Tip size 1.3)

270mm

(Tip size 1.3)200mm

Primer Surfacer
Thick arch

280mm

Primer Surfacer
Thin arch(Tip size 1.8)
(Tip size 1.8)

FluidInlet

Air Inlet

Weight

G1/4

G1/4

265ｇParts 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
LUNA2-35
LUNA2-G-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

Description
Retaining Ring
Seat
Air Cap
Fluid Tip
BaffleGasket (5 pcs.)
Fluid Inlet
Gun Body
Pattern Valve
Valve Seal Kit
Air Valve
Valve Spring (5 pcs.)
Air Valve Bushing
NeedleNeedle Spring (5 pcs.)
Adjusting Screw (brass)
Needle Packing
Packing Gland (3 pcs.)
E-ring Kit (10 pcs.)
Bearing Stud (5 pcs.)
Trigger
Cheater Valve
Air Connector
Valve Seal Inserting Tool(Option)

Qty

11111111111111111111
1111

Valve Seal
Inserting Tool

DirectionofNeedle Packing

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. A damaged
seat may cause air leakage.
Description
Tip Size (mm)Fluid Tip

Needle

1.3

LUNA2-4-1.3

LUNA2-41-1.3

1.5

LUNA2-4-1.5

LUNA2-41-1.5

1.8

LUNA2-4-1.8

LUNA2-41-1.8

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 is
recommended 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 0.39MPa~0.49MPa. Do not exceed the maximum
working air pressure for proper usage (0.69MPa).
2. Try with the pressure starting from around 0.15MPa, 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.

2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 byemptying 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,separately sold SSL-10 Gun Lube* which is vegetable-based and does not repel pain is recommended. (Do not use thiswith water-borne paints.)
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).
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.
6. Tighten the Fluid tip using a torque wrench to 8N・m.
Fluid Inlet (7) and Air Connector (23)
Fluid Inlet (7) and Air Connector (23) are fixed together with threadlocking adhesive. Do not disassemble or reassemble.
Pattern Valve (9) and Cheater Valve (22)When disassembling and assembling the pattern valve (9) and cheater valve (22), loosen the knob fully counterclockwise
and then use a 13mm socket wrench or offset 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), be
careful 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, then loosen the packing gland with an 8mm
wrench slightly from the point where the Needle (14) is not well pulled back to adjust the needle so that it moves
smoothly. The standard angle is about 5 minutes of a clock hands.

3

SERVICE CHECKNormal Spray Pattern

Problemwill not spray.

No pressure to Gun.

CauseCorrection
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: Readjustment and clean the Air
Cap or Fluid Tip.
C,D: Adjust fluid delivery or viscosity.

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 fromFluid 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 the rear of the needle (14) byhand until it slightly moves.

Loose Adjusting Screw (16).

Adjust the screw.

ACCESSORIESPart No.

Description

Part No.

Description

KGL-400-FA-ST

Upper Cup (400ml free angle/Aluminum)

HAF-507

Disposable Air Filter

KG-400-FA

Upper Cup (400ml free angle/SUS)

SSL-10Gun Lube (60ml)

HAV-503-B

Air Adjusting Valve with Gauge

42884-214-K5

Cleaning Brush (kit of 5)

GFC-400

Multi Lid for 400ml Gravity Cup

SHIM-3

Shim Mask

TCK-121-K12

Dry Tack Wipe

D803553-K12

Anti-static Wipers (kit of 12 sheets)

2024.04-LUNA2X-PL-E01

4