Graco 3A0232R User Manual

Operation - Repair

™

Gun and

Cutter

For use with polyester resin and gel-coat.

For professional use only.

Important Safety Instructions

Read all warnings and instructions in this manual. Save these instructions.

See page 3 for model information, including maximum working pressure.

3A0232R

External Mix Chop Gun with Cutter shown

II 2 G c T6

Contents

Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Important Two-Component Information . . . . . . . . 6

Material Self-ignition . . . . . . . . . . . . . . . . . . . . . 6

Keep Components A and B Separate . . . . . . . . . 6

Changing Materials . . . . . . . . . . . . . . . . . . . . . . . 6

Important Methyl Ethyl Ketone Peroxide (MEKP)

Safety Information . . . . . . . . . . . . . . . . . . . . . . . 7

Component Identification . . . . . . . . . . . . . . . . . . . 10

External Mix Gel Gun, 258840 . . . . . . . . . . . . . 10

Internal Mix Gel Gun, 258853 . . . . . . . . . . . . . . 11

Internal Mix Chop Gun, 258854 . . . . . . . . . . . . 12

Internal Mix Chop Gun, 24P436, High Flow, Carbide

Seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

External Mix Chop Gun, 258852 . . . . . . . . . . . 14

Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . 15

External Mix . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Internal Mix . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Chop Guns . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Impingement versus Airless Spray Tips . . . . . . 15

Air Assist Containment

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Trigger Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Adjust AAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Internal Mix Flush . . . . . . . . . . . . . . . . . . . . . . . 19

Pressure Relief Procedure . . . . . . . . . . . . . . . . . . 20

Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Daily Shutdown . . . . . . . . . . . . . . . . . . . . . . . . 21

Long-Term Shutdown . . . . . . . . . . . . . . . . . . . . 23

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Flush System . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Fluid Leaking from Front of Gun . . . . . . . . . . . . 29

Adjust Trigger Clamp . . . . . . . . . . . . . . . . . . . . 29

Fluid Leaking from Under Trigger Clamp Assembly

Adjust Needle Packing Tension . . . . . . . . . . . . 30

Adjust Actuator Pin Adjustment Screws . . . . . . 31

™

(AAC™) . . . . . . . . . . . 15

Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Remove Hardened Material from Internal Mix Front

Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Replace Internal Mix Element . . . . . . . . . . . . . 34

Replace External Mix Check Valve and O-Rings 35

Replace Material Needle Assembly . . . . . . . . . . 36

Replace Center Needle Assembly . . . . . . . . . . 36

Replace Needle Packing . . . . . . . . . . . . . . . . . . 37

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

External Mix Gel Gun, 258840 . . . . . . . . . . . . . 38

Internal Mix Gel Gun, 258853 . . . . . . . . . . . . . . 40

External Mix Chop Gun with Cutter, 258970 . . . 42 Internal Mix Chop Gun with Cutter, 258971 . . . 42 Internal Mix, High Flow, Chop Gun with Cutter,

24P435 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Chop Guns . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Front Head Assemblies . . . . . . . . . . . . . . . . . . . 49

Needle Assembly, 24E417 . . . . . . . . . . . . . . . . 52

O-ring Identification . . . . . . . . . . . . . . . . . . . . . . 53

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Fusion

INDy or Formula Adapter Kit, 125797 . . . . . . . . 54

LPA2 Adapter Kit, 125843 . . . . . . . . . . . . . . . . . 54

Universal Adapter Kit, 257754 . . . . . . . . . . . . . . 54

Resin Transfer Molding (RTM) Nozzle Adapter Kit,

Casting Nozzle Adapter Kit, 16T707 . . . . . . . . . 54

External Mix High-Flow Kit, 24H336 . . . . . . . . . 54

Internal Mix High-Flow Kit, 24H337 . . . . . . . . . . 54

AAC Regulators . . . . . . . . . . . . . . . . . . . . . . . . . 55

External Mix Gel Gun to Chop Gun Conversion 55 Internal Mix Gel Gun to Chop Gun Conversion . 55

Pressure Fed Roller Adapter Kit, 16T708 . . . . . 56

Extension Gelcoat Spraying Kit, 16T709 . . . . . . 56

Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Carbide Resin Seat, 24M833 . . . . . . . . . . . . . . 56

External Mix Chopper Extension Kit, 24V096 . . 56

Impingement (Chop) Spray Tips . . . . . . . . . . . . 58

Airless (Gel) Spray Tips . . . . . . . . . . . . . . . . . . . 60

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 66

Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 66

Grease . . . . . . . . . . . . . . . . . . . . . . . . . 54

16T680 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

2 3A0232R

Models

See Technical Data on page 62 for more specifications.

Models

Model Description

258853

258854

258971

24P435

258840

258852

258970

Internal Mix

Gel Gun

Internal Mix

Chop Gun,

No Cutter

Internal Mix

Chop Gun,

Cutter

Internal Mix

Chop Gun,

High Flow,

Cutter

External Mix

Gel Gun

External Mix

Chop Gun,

No Cutter

External Mix

Chop Gun,

Cutter

Maximum Fluid

Working Pressure

psi (MPa, bar)

2000 (14, 138) 2000 (14, 138)

2000 (14, 138) 200 (1.4, 14)

Maximum Catalyst

Working Pressure

psi (MPa, bar)

Air Inlet Working

Pressure Range

psi (MPa, bar)

0-125

(0-0.86, 0-8.6)

0-125

(0-0.86, 0-8.6)

80-125

(0.55-0.86, 5.5-8.6)

80-125

(0.55-0.86, 5.5-8.6)

0-125

(0-0.86, 0-8.6)

0-125

(0-0.86, 0-8.6)

80-125

(0.55-0.86, 5.5-8.6)

Maximum Fluid

Tem peratu re

°F (°C)

100 (38)

Related Manuals

The following is a list of component manuals written in English. These manuals and any translated versions available can be found at www.graco.com.

Part Description

3A1226 Universal Adapter Kit 257754 Instructions

3A2054 Indy or Formula Adapter Kit 125797 Instructions

3A2079 LPA2 Adapter Kit 125843 Instructions

332574 RS Gun Cutter Assemblies Operation-Repair

334010 RS Gun External Mix Chopper Extension Kit 24V096 Instructions

3A0232R 3

Warnings

The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclamation point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks. When these symbols appear in the body of this manual, refer back to these Warnings. Product-specific hazard symbols and warnings not covered in this section may appear throughout the body of this manual where applicable.

WARNING

FIRE AND EXPLOSION HAZARD

Flammable fumes, such as 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, portable electric lamps, and plastic drop cloths (potential static arc).

• Keep work area free of debris, including solvent, rags and gasoline.

• Do not plug or unplug power cords, or turn power or light switches on or off when flammable fumes are present.

• Ground all equipment in the work area. See Grounding instructions.

• Use only grounded hoses.

• Hold gun firmly to side of grounded pail when triggering into pail.

• If there is static sparking or you feel a shock, stop operation immediately. Do not use equipment until you identify and correct the problem.

• Keep a working fire extinguisher in the work area.

SKIN INJECTION HAZARD

High-pressure fluid from dispensing device, hose leaks, or ruptured components will pierce skin. This may look like just a cut, but it is a serious injury that can result in amputation. Get immediate surgical

treatment.

• Engage trigger lock when not dispensing.

• Do not point dispensing device at anyone or at any part of the body.

• Do not put your hand over the fluid outlet.

• Do not stop or deflect leaks with your hand, body, glove, or rag.

• Follow the Pressure Relief Procedure when you stop dispensing and before cleaning, checking, or servicing equipment.

• Tighten all fluid connections before operating the equipment.

• Check hoses and couplings daily. Replace worn or damaged parts immediately.

MOVING PARTS HAZARD

Moving parts can pinch, cut or amputate fingers and other body parts.

• Keep clear of moving parts.

• Do not operate equipment with protective guards or covers removed.

• Pressurized equipment can start without warning. Before checking, moving, or servicing equipment, follow the Pressure Relief Procedure and disconnect all power sources.

4 3A0232R

Warnings

WARNING

TOXIC FLUID OR FUMES HAZARD

Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or swallowed.

• Read MSDSs to know the specific hazards of the fluids you are using.

• Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.

• Always wear chemically impermeable gloves when spraying, dispensing, or cleaning equipment.

PERSONAL PROTECTIVE EQUIPMENT

You must wear appropriate protective equipment when operating, servicing, or when in the operating area of the equipment to help protect you from serious injury, including eye injury, hearing loss, inhalation of toxic fumes, and burns. This equipment includes but is not limited to:

• Protective eyewear, and hearing protection.

• Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufacturer.

EQUIPMENT MISUSE HAZARD

Misuse can cause death or serious injury.

• Do not operate the unit when fatigued or under the influence of drugs or alcohol.

• Do not exceed the maximum working pressure or temperature rating of the lowest rated system component. See Technical Data in all equipment manuals.

• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information about your material, request MSDS from distributor or retailer.

• Do not leave the work area while equipment is energized or under pressure. Turn off all equipment and follow the Pressure Relief Procedure when equipment is not in use.

• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine manufacturer’s replacement parts only.

• Do not alter or modify equipment.

• Use equipment only for its intended purpose. Call your distributor for information.

• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.

• Do not kink or over bend hoses or use hoses to pull equipment.

• Keep children and animals away from work area.

• Comply with all applicable safety regulations.

PRESSURIZED ALUMINUM PARTS HAZARD

Use of fluids that are incompatible with aluminum in pressurized equipment can cause serious chemical reaction and equipment rupture. Failure to follow this warning can result in death, serious injury, or property damage.

• Do not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or fluids containing such solvents.

• Many other fluids may contain chemicals that can react with aluminum. Contact your material supplier for compatibility.

3A0232R 5

Important Two-Component Information

Material Self-ignition

Some materials may become self-igniting if applied too thickly. Read material manufacturer’s warnings and material MSDS.

Keep Components A and B Separate

Cross-contamination can result in cured material in fluid lines which could cause serious injury or damage equipment. To prevent cross-contamination of the equipment’s wetted parts, never interchange component A (catalyst) and component B (resin) parts.

Changing Materials

• When changing materials, flush the equipment multiple times to ensure it is thoroughly clean.

• Always clean the fluid inlet strainers after flushing.

• Check with your material manufacturer for chemical compatibility.

6 3A0232R

Important Methyl Ethyl Ketone Peroxide (MEKP) Safety Information

MEKP is among the more hazardous materials found in commercial channels. Proper handling of the “unstable (reactive)” chemicals presents a definite challenge to the plastics industry. The highly reactive property which makes MEKP valuable to the plastics industry in producing the curing reaction of polyester resins and gel-coats also produces the hazards which require great care and caution in its storage, transportation, handling, processing and disposal.

Workers must be thoroughly informed of the hazards that may result from improper handling of MEKP, especially in regards to contamination and heat. They must be thoroughly instructed regarding the proper action to be taken in the storage, use and disposal of MEKP and other hazardous materials used in the laminating operation.

MEKP is flammable and potentially explosive, as well as potentially damaging to the eyes and skin. Read material manufacturer’s warnings and material MSDS to know specific hazards and precautions related to MEKP.

Contaminated MEKP can become explosive. Prevent contamination of MEKP with other materials, which includes, but is not limited to polyester overspray, polymerization accelerators and promoters, and non-stainless metals. Even small amounts of contaminates can make MEKP explosive. This reaction may start slowly, and gradually build-up heat, which can accelerate until fire or an explosion result. This process can take from seconds to days.

Heat applied to MEKP, or heat build-up from contamination reactions can cause it to reach what is called its Self-Accelerating Decomposition Temperature (SADT), which can cause fire or explosion. Spills should be promptly removed, so no residues remain. Spillage can heat up to the point of self-ignition. Dispose in accordance with manufacture’s recommendation.

Store MEKP in a cool, dry and well-ventilated area in the original containers away from direct sunlight and away from other chemicals. It is strongly recommended that the storage temperature remain below 86° F (30° C). Heat will increase the potential for explosive decomposition. Refer to NFPA 432. Keep MEKP away from heat, sparks and open flames.

Current catalysts are premixed and do not require any diluents. Graco strongly recommends that diluents not be used. Diluents add to the possibility of contaminates entering the catalyst system. Never dilute MEKP with acetone or any solvent since this can produce an extremely shock-sensitive compound which can explode.

Use only original equipment or equivalent parts from Graco in the catalyst system (i.e.: hoses, fittings, etc.) because a hazardous chemical reaction may result between substituted parts and MEKP.

To prevent contact with MEKP, appropriate personal protective equipment, including chemically impermeable gloves, boots, aprons and goggles are required for everyone in the work area.

3A0232R 7

Important Methyl Ethyl Ketone Peroxide (MEKP) Safety Information

Polyester Resins and Gel-Coats

Spraying materials containing polyester resin and gel-coats creates potentially harmful mist, vapors and atomized particulates. Prevent inhalation by providing sufficient ventilation and the use of respirators in the work area.

Read the material manufacturer’s warnings and material MSDS to know specific hazards and precautions related to polyester resins and gel-coats.

To prevent contact with polyester resins and gel-coats, appropriate personal protective equipment, including chemically impermeable gloves, boots, aprons and goggles are required for everyone in the work area.

Spraying and Lamination Operations

Remove all accumulations of overspray, FRP sandings, etc. from the building as they occur. If this waste is allowed to build up, spillage of catalyst is more likely to start a fire.

If cleaning solvents are required, read material manufacture’s warnings and material MSDS to know specific hazards and precautions. (Graco recommends that clean-up solvents be nonflammable.)

NOTE: Graco recommends that you consult OSHA Sections 1910.94, 1910.106, 1910.107 and NFPA No. 33, Chapter 16,17, and NFPA No. 91 for further guidance.

8 3A0232R

Important Methyl Ethyl Ketone Peroxide (MEKP) Safety Information

3A0232R 9

Component Identification

External Mix Gel Gun, 258840

Key:

A Trigger Clamp Assembly B Gun Mount C Front Head Locking Ring D Air Cap Retaining Ring E External Mix Aircap F External Mix Front Head

258840_3A0232_1g

GSpray Tip H Trigger guard J Trigger K Trigger lock L Handle M Actuator Pin

FIG. 1

10 3A0232R

Internal Mix Gel Gun, 258853

NOTE: On internal mix guns, the tip rotates to allow a

vertical or horizontal spray pattern.

Component Identification

Key:

A Trigger Clamp Assembly BGun Mount C Front Head Locking Ring D Air Cap Retaining Ring E Internal Mix Aircap F Internal Mix Front Head

ti21003a

GSpray Tip H Trigger guard J Trigger K Trigger lock L Handle M Actuator Pin

IG. 2

3A0232R 11

Component Identification

Internal Mix Chop Gun, 258854

NOTE: On internal mix guns, the tip rotates to allow ver-

tical or horizontal spray pattern.

Key:

A Trigger Clamp Assembly B Cutter Mount C Front Head Locking Ring D Air Cap Retaining Ring E Internal Mix Aircap F Internal Mix Front Head

ti21004b

GSpray Tip H Trigger guard J Trigger K Trigger lock L Handle MActuator Pin

IG. 3

12 3A0232R

Component Identification

Internal Mix Chop Gun, 24P436, High Flow, Carbide Seat

NOTE: On internal mix guns, the tip rotates to allow ver-

tical or horizontal spray pattern.

Key:

A Trigger Clamp Assembly B Cutter Mount C Front Head Locking Ring D Air Cap Retaining Ring E Internal Mix Aircap F Internal Mix Front Head,

High Flow

ti21005b

GSpray Tip H Trigger guard J Trigger K Trigger lock L Handle MActuator Pin

IG. 4

3A0232R 13

Component Identification

External Mix Chop Gun, 258852

ti21006b

Key:

A Trigger Clamp Assembly B Cutter Mount C Front Head Locking Ring D Air Cap Retaining Ring E External Mix Aircap F External Mix Front Head

GSpray Tip H Trigger guard J Trigger K Trigger lock L Handle M Actuator Pin

FIG. 5

14 3A0232R

Theory of Operation

External Mix

The resin or gelcoat stream and the catalyst stream impinge when they exit the spray tip. The catalyst is atomized with air pressure by the AAC air to achieve high mix quality. External mixing reduces internal clogs from cured material.

Internal Mix

The material and catalyst pass through an internal static mixer where they mix. The mixed solution is dispensed.

Chop Guns

Fiberglass is pulled through cutter and cut into small strands. The cut strands are then dispensed into the mixed material stream.

Grounding

This equipment must be grounded.

Grounding reduces the risk of static shock by providing an escape wire for electrical current due to static build up or in the event of short circuit.

NOTE: Grounding wire and clamp assembly 17440-00 is included with Graco FRP proportioner. If using a different proportioner that does not come with a grounding wire and clamp assembly, order 17440-00 or provide your own.

Ground the dispense gun through connection to a Graco approved grounded fluid supply hose.

Check your local electrical code and related manuals for detailed grounding instructions of all equipment in the work area.

Impingement versus Airless Spray Tips

Impingement spray tips are typically for chop guns. This utilizes multiple impinging streams to create the fan pattern.

Airless spray tips are typically for gel guns. This utilizes a single cat-eye shaped orifice to create the fan pattern.

Air Assist Containment™

™

(AAC

When material exits the spray tip, air is sprayed against the material stream to shape it into a more consistent pattern.

)

Introduction

To have the optimal RS gun experience, the most important procedures to understand and perform as specified are:

• Startup on page 18

• Adjust Trigger Clamp on page 29

• Adjust Anvil to Blade Cartridge Tension. Refer to RS Gun Cutter Assemblies Operation-Repair manual for details.

• Daily Shutdown on page 21

NOTICE

Failure to perform these procedures correctly and according to the prescribed schedule can result in poor mixing, fluid leaking, cured material in the gun, and premature component wear.

3A0232R 15

Setup

NOTICE

The equipment was tested with lightweight oil, which is left in the fluid passages to protect parts. To avoid contaminating your fluid with oil, flush the equipment with a compatible solvent before using the equipment. See Flush System, page 24.

1. Before first use, flush the gun. See Flush System, page 24.

NOTE: The recommended solvent pressure during flushing is 80-100 psi (550-700 kPa, 5.5-7.0 bar).

2. Engage trigger lock.

3. For guns with cutters, install cutter:

a. If necessary, use a crescent wrench to adjust

pivot (541) so that it is parallel to gun front end and the open end points to the front of the gun. See F

IG. 6.

e. Adjust cutter dispensing angle and chute angle

as desired.

4. For internal mix guns, verify solvent knob (BD) is adjusted to the fully closed position. See F

IG. 7 on

page 17.

5. Attach gun connections as described in F

IG. 7 on

page 17. See Techn ical Data on page 62 for fitting sizes.

6. For internal mix guns, prime the solvent line. Turn solvent adjustment knob (BD) until solvent discharges from the front of the gun. See F

IG. 7 on

page 17.

NOTICE

Internal mix guns: To prevent material curing inside the gun, do not trigger gun if solvent is not primed.

NOTE: The recommended solvent line pressure is 80-100 psi (550-700 kPa, 5.5-7.0 bar).

541

IG. 6

b. Back out screws (630). See F

542

630

ti21008a

IG. 6.

c. Install cutter onto pivot so glass feed holes are

on top.

NOTE: Ensure proper engagement of o-ring (542) into the cutter assembly. Verify there is no excess air leakage because it will greatly reduce the performance of the air motor. See F

IG. 6.

d. Tighten screws (630) to lock cutter in place.

7. For guns with cutters, insert glass strands into feed.

8. For guns with cutters, adjust anvil to blade tension. Refer to RS Gun Cutter Assemblies Operation-Repair for part identification:

a. Release lockdown.

b. Adjust tension knob as desired.

c. Tighten lockdown.

d. Release idler lock down.

e. Adjust idler lock down until it touches anvil.

f. Tighten idler lock down.

g. Perform test spray to verify proper cutting of

glass strands.

h. Adjust tension as necessary.

9. For external mix guns, adjust AAC knob (BD) to middle of possible range of movement. See F

IG. 7

on page 17.

16 3A0232R

10. Adjust AAC pressure on proportioner.

11. Perform test spray. Adjust system and gun settings as necessary to get desired results.

Setup

IG. 7: Fitting Details

258840_3A0232_2g

BABE

Ref External Mix Internal Mix Chop Internal Mix Gel Fitting Size

Atomized Air

(Catalyst)

Air Assist Contain-

ment (AAC)

Plugged 1/4 tube

BB Resin Inlet 1/4 NPSM

Air Assist Con-

tainment (AAC)

Solvent 1/8 NPSM

BD Adjustment Knob --

BE Chop Air Inlet

Air Assist Contain-

ment (AAC)

3/8 tube

BF Catalyst Inlet #4 JIC

3A0232R 17

Startup

1. Inspect o-rings on housings. Replace as needed. See F

IG. 8.

Housing O-rings

258840_3A0232_3g

IG. 8

2. Prime the system as required.

NOTICE

Gun damage can occur when the system is primed with the front head installed. To avoid damage, only prime the system with the front head removed.

3. Align front head with housings and install front head. Tighten front head locking ring (C).

4. Verify air cap retaining ring (D) is tight.

Ensure locking ring (C) and retaining ring (D) are tight before spraying. Spraying while either item is loose may result in skin injection.

5. Verify fluid and air lines are at the desired pressures then begin using the gun.

18 3A0232R

Operation

High-pressure fluid from gun, hose leaks, or ruptured components will pierce skin. This may look like just a cut, but it is a serious injury that can result in amputation. Get immediate surgical treatment.

• Do not point gun at anyone or at any part of the body.

• Do not put your hand over the dispense outlet.

• Do not stop or deflect leaks with your hand, body, glove, or rag.

• Follow Pressure Relief Procedure when you stop dispensing and before cleaning, checking, or servicing equipment.

Tri gg er Lock

Operation

Adjust AAC

If the spray pattern is not even, the AAC air pressure may need to be adjusted. For all guns, the AAC air pressure is set at the system. The external mix gun includes an AAC air pressure adjustment on the gun also, see AAC reference in F pressure on the external mix gun, turn knob counter-clockwise. To decrease air pressure, turn knob clockwise. For large changes in AAC air pressure, adjust the pressure at the system.

IG. 7 on page 17. To increase AAC air

Bad

Good

Engage trigger lock whenever you stop spraying to avoid accidental triggering.

Engage

TI10442a

Disengage

TI10441a

FIG. 9

Internal Mix Flush

NOTE: The recommended solvent line pressure is

80-100 psi (550-700 kPa, 5.5-7.0 bar).

After spraying, open the solvent knob (BC) to allow solvent to flow through the gun. See F While flushing, hold a metal part of the gun firmly to a grounded metal pail.

IG. 7 on page 17.

3A0232R 19

Pressure Relief Procedure

1. Shutdown proportioner.

2. Relieve proportioner pressure. See proportioner manual.

3. Engage gun trigger lock.

4. Close the bleed-type master air valve.

5. Disengage the trigger lock.

6. Hold a metal part of the gun firmly to a grounded metal pail. Trigger the gun to relieve pressure.

7. Engage the trigger lock.

8. With a waste container in place, open all fluid drain valves in the system. Leave drain valve(s) open until you are ready to spray again.

9. If you suspect the spray tip or hose is clogged or that pressure has not been fully relieved after following the steps above, VERY SLOWLY loosen retaining ring (D) or loosen hose end coupling to relieve pressure gradually, then loosen completely. Clear hose or tip obstruction. See F part references.

IG. 1 on page 10 for

20 3A0232R

+ 46 hidden pages