Graco 295530 Quick start guide

311320G

Operation, Parts, Service and Repair

Model D Spray Gun

For use with non-flammable polyurethane foams. For professional use only.

Not for use in explosive atmospheres.

See page 2 for model information.

1000 psi (7 MPa, 70 bar) Maximum Working Pressure

Important Safety Instructions

Read all warnings and instructions

in this manual. Save these instructions.

ENG

Models

2311320G

Contents

Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Overall View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Major Components . . . . . . . . . . . . . . . . . . . . . . . 5

Centerline Components . . . . . . . . . . . . . . . . . . . 6

Operation Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Isocyanate Hazard . . . . . . . . . . . . . . . . . . . . . . . 7

Keep A and B Components Separate . . . . . . . . . 7

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Coupling Block . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Air Hose Connection . . . . . . . . . . . . . . . . . . . . . . 9

Valving Rod Adjustment Screw . . . . . . . . . . . . . . 9

Air Cap Adjustment Valve . . . . . . . . . . . . . . . . . 10

Felt Wiper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Initial Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Daily Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Daily Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Pressure Relief Procedure . . . . . . . . . . . . . . . . . . 13

Spray Pattern Adjustment . . . . . . . . . . . . . . . . . . . 14

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Gun Service Kits . . . . . . . . . . . . . . . . . . . . . . . . 17

Clean Spray Gun Procedure . . . . . . . . . . . . . . . 18

Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Filter Screen Removal and Service . . . . . . . . . . 19

Clean Injection Slots . . . . . . . . . . . . . . . . . . . . . 20

Valving Rod Adjustment . . . . . . . . . . . . . . . . . . 21

Centerline Component Removal . . . . . . . . . . . . 22

Centerline Component Installation . . . . . . . . . . 24

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Model D Spray Gun Assembly . . . . . . . . . . . . . . 26

Air Cylinder Assembly . . . . . . . . . . . . . . . . . . . . 30

Coupling Block Assembly . . . . . . . . . . . . . . . . . 31

Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 34

Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 34

Models

Part No. Description Mix Module

295530 D-55 296597

295531 D-55-RECIRC 296597

295532 D-62 296598

295533 D-70 296599

Warnings

311320G 3

Warnings

The following general warnings are for the setup, use, grounding, maintenance, and repair of this

equipment. Additional, more specific warnings may be found throughout the body of this manual

where applicable. Symbols appearing in the body of the manual refer to these general warnings.

When these symbols appear throughout the manual, refer back to these pages for a description

of the specific hazard.

WARNING

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,

inhalation of toxic fumes, burns, and hearing loss. This equipment includes but is not limited to:

• Protective eyewear

• Clothing and respirator as recommended by the fluid and solvent manufacturer

•Gloves

• Hearing protection

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 MSDS’s 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.

SKIN INJECTION HAZARD

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 surgi-

cal treatment.

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

• Do not put your hand over the spray tip.

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

• Do not spray without tip guard and trigger guard installed.

•FollowPressure Relief Procedure in this manual, when you stop spraying and before

cleaning, checking, or servicing equipment.

Warnings

4311320G

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 fire extinguisher in the work area.

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 com-

plete information about your material, request MSDS forms from distributor or retailer.

• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine

Graco/Gusmer replacement parts only.

• Do not alter or modify equipment.

• Use equipment only for its intended purpose. Call your Graco/Gusmer distributor for infor-

mation.

• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot sur-

faces.

• 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 EQUIPMENT HAZARD

Fluid from the gun/dispense valve, leaks, or ruptured components can splash in the eyes or on

skin and cause serious injury.

•FollowPressure Relief Procedure in this manual, when you stop spraying and before

cleaning, checking, or servicing equipment.

• Tighten all fluid connections before operating the equipment.

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

WARNING

Overall View

311320G 5

Overall View

Major Components

FIG. 1: Major Components

Spring Retainer Case

Valving Rod Closure Spring

Valving Rod Positioner Valving Rod

Adjustment Screw

Valving Rod Stop Bar

Valving Rod

Piston Rod

Trigger

Air Cap Adjustment Valve

Gun Block

Coupling Block

Mounting Screw

Overall View

6311320G

Centerline Components

FIG. 2: Centerline Components

Coupling Block Gaskets

Air Cap

Mixing Chamber Case

Snap Ring

Screen

Seal

A-Iso Check Valve

Screen Screw

Gun Block

Mounting Screw

O-Ring

Closure

Screw

Valving Rod

Assembly

Felt Wiper Retainer

Gun Block

R-Resin Check Valve

Screen Mounting Screw

Operation Basics

311320G 7

Operation Basics

Isocyanate Hazard

Keep A and B Components

Separate

Grounding

Check your local electrical code and propor-

tioner manual for detailed grounding instruc-

tions.

Ground the spray guy through connection to a

Graco-approved grounded fluid supply hose.

Coupling Block

Install Coupling Block

1. Inspect coupling block gaskets for damage

and wear. Replace if necessary.

2. With gaskets in place, fit coupling block to

gun block.

3. Insert coupling block mounting screw and

tighten securely with 5/16 in. nut driver.

FIG. 3: Coupling Block

To prevent accidental gun operation, always

disconnect air supply before servicing gun or

anytime gun is not in use.

Spraying materials containing isocyanates

creates potentially harmful mists, vapors,

and atomized particulates.

Read material manufacturer’s warnings and

material MSDS to know specific hazards

and precautions related to isocyanates.

Prevent inhalation of isocyanate mists,

vapors, and atomized particulates by provid-

ing sufficient ventilation in the work area. If

sufficient ventilation is not available, a sup-

plied-air respirator is required for everyone in

the work area.

To prevent contact with isocyanates, appro-

priate personal protective equipment, includ-

ing chemically impermeable gloves, boots,

aprons, and goggles, is also required for

everyone in the work area.

CAUTION

To prevent cross-contamination of the gun’s

wetted parts, do not interchange A compo-

nent (isocyanate) and B component (resin)

parts. The gun is shipped with the A side on

the left.

Coupling Block

Gaskets

Coupling Block

Mounting Screw

Operation Basics

8311320G

Manual Valves

1. Open manual valves using 5/16 in. nut

driver; turn manual valves counterclock-

wise approximately three full turns. Do not

open until it bottoms out.

2. Close manual valves by turning fully clock-

wise.

FIG. 4: Manual Valves

Remove Coupling Block

1. Disconnect air hose.

2. Close both manual valves.

3. Remove coupling block mounting screw

(FIG. 3).

4. Separate coupling block from gun. Do not

lose gaskets.

5. Use gun cleaner to wipe clean mating sur-

face of gun block and coupling block. Cover

exposed opening with grease.

Triggering gun with manual valves closed

may cause crossover if gun ports contain

residual chemical.

Never open manual valves unless coupling

block is secured to gun or exit port is directed

into flush pail.

Manual Valves

To prevent release of pressurized chemical,

close both manual valves before removing

coupling block.

Operation Basics

311320G 9

Air Hose Connection

To CONNECT air hoses, pull back sleeve of

female fitting, insert male fitting and slide

sleeve forward to secure connection.

To DISCONNECT air hoses, pull back sleeve

of female fitting and remove male fitting.

FIG. 5: Air Hose Connection

Valving Rod Adjustment

Screw

Use to regulate amount of valving rod travel

when gun trigger is depressed with air supply

connected. Turn clockwise to decrease travel,

and counterclockwise to increase travel.

1. Use 5/64 in. hex key wrench to loosen fric-

tion lock.

2. Turn adjustment screw as required and

tighten friction lock until screw no longer

easily turns by hand.

3. Check friction lock periodically and tighten

as required to prevent screw from slipping

during operation.

FIG. 6: Valving Rod Adjustment Screw

Pull Sleeve

Friction Lock

Operation Basics

10 311320G

Air Cap Adjustment Valve

Use to control amount of air that passes

through air cap and over mixing chamber tip.

Airflow helps keep tip free of sprayed chemical.

Too much air may distort spray pattern and

create overspread. Too little air will not prop-

erly clean end of valving rod.

To OPEN valve, turn knob approximately 1/8

turn counterclockwise.

To CLOSE valve, turn knob fully clockwise.

FIG. 7: Air Valve Adjustment

Felt Wiper

Adjust Felt Wiper

1. Use 5/16 in. open-end wrench to loosen

retainer slightly.

2. Slowly tighten it by hand until it seats

against rear packings in mixing chamber.

3. Use 5/16 in. open-end wrench to tighten

retainer another half turn.

FIG. 8: Felt Wiper

Clean Felt Wiper

1. Insert nozzle of flush can into holes of felt

wiper.

2. Saturate felt with gun cleaner.

Open

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