Graco 311322H Quick start guide

Operation, Parts, Service and Repair

GAP Pro Spray Gun

For use with non-flammable polyurethane foams. Not for use in explosive

atmospheres.

See page 3 for model information.

3000 psi (20.7 MPa, 207 bar) Maximum Working Fluid Pressure

125 psi (0.86 MPa, 8.6 bar) Maximum Working Air Pressure

Important Safety Instructions

Read all warnings and instructions

in this manual. Save these instructions.

311322H

2311322H

Contents

Gun Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

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

Overall View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Major Components . . . . . . . . . . . . . . . . . . . . . . . 6

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Isocyanate Hazard . . . . . . . . . . . . . . . . . . . . . . . 8

Keep A and B Components Separate . . . . . . . . . 8

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Safety Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Manual Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Air Hose Configurations . . . . . . . . . . . . . . . . . . 10

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

Daily Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Daily Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . 11

Pressure Relief Procedure . . . . . . . . . . . . . . . . 12

Grease Gun . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Side Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Mixing Chamber and Gun Block . . . . . . . . . . . . 15

End Cap and Air Piston . . . . . . . . . . . . . . . . . . . 17

End Cap O-ring and Safety Stop Seal . . . . . . . . 19

Trigger/Air Valve . . . . . . . . . . . . . . . . . . . . . . . . 21

Air Passage Diagrams . . . . . . . . . . . . . . . . . . . . 23

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

GAP Pro Spray Gun Assembly . . . . . . . . . . . . . 26

GAP Pro Spray Gun Handle Assembly . . . . . . . 30

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

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

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

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

Gun Models

311322H 3

Gun Models

★Flat pattern guns are sold without a spray

tip. See Flat Spray Tip Kits, page 32 for tip

choices.

Part No. Description Mix Module

295550★Flat Pattern Gun #00 flat

295551★Flat Pattern Gun #01 flat

295552★Flat Pattern Gun #02 flat

295553★Flat Pattern Gun #03 flat

295554★Flat Pattern Gun #04 flat

295556★Flat Pattern Gun #05 flat

295557 Round Pattern Gun #00 round

295558 Round Pattern Gun, Recirculating #00 round

295559 Round Pattern Gun #01 round

295560 Round Pattern Gun #02 round

295561 Round Pattern Gun #03 round

295562 Round Pattern Gun #04 round

Warnings

4311322H

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 appli-

cable 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 surgical 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.

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 immedi-

ately.

Warnings

311322H 5

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 Tech-

nical Data in all equipment manuals. Read fluid and solvent manufacturer’s warn-

ings. For complete 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

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

Do not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon

solvents or fluids containing such solvents in pressurized aluminum equipment. Such

use can cause serious chemical reaction and equipment rupture, and result in death,

serious injury, and property damage.

WARNING

Overall View

6311322H

Overall View

Major Components

FIG. 1. Major Components (shown with round spray tip)

A-Screen

Screw

A-Manual Valve

Spray Tip

R-Screen

Screw

Trigger

Safety Stop

R-Manual

Valve

Overall View

311322H 7

FIG. 2. Front End Components (shown with flat spray tip assembly)

Side Block

Screws

A-Side

Block

Gun Block

Screws

Air Seal

Air Cap

Flat Tip

R-Side Block

Gun Block

Mixing

Chamber

O-Ring

Operation

8311322H

Operation

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 gun through connection to a

Graco-approved grounded fluid supply hose.

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.

Operation

311322H 9

Safety Stop

The GAP Pro gun has a 2-position safety stop.

When engaged, it prevents accidental trigger-

ing of gun. When disengaged, it allows gun to

dispense.

1. To engage the safety stop, push in and

turn the safety stop knob clockwise. See

FIG. 3.

2. To disengage the safety stop, push in

and turn the safety stop knob counterclock-

wise. See FIG. 4.

Manual Valves

Manual valves located on the side blocks con-

trol flow of each chemical component to gun.

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

driver; turn manual valves counterclock-

wise approximately three full turns.

2. Close manual valves by turning fully clock-

wise.

Always engage safety stop, close both man-

ual valves, and disconnect air before clean-

ing, maintaining, or repairing gun, or any time

gun is not in use.

FIG. 3. Engage Safety Stop

FIG. 4. Disengage Safety Stop

Triggering gun with manual valves closed

may cause crossover if gun ports contain

residual chemical.

Always engage safety stop, close both man-

ual valves, and disconnect air before clean-

ing, maintaining, or repairing gun, or any time

gun is not in use.

Never open a manual valve unless side block

is secured to gun or exit port is directed into

flush pail.

FIG. 5. Manual Valves

Manual

Valves

Coupling

Blocks

Operation

10 311322H

Air Hose Configurations

The GAP Pro Gun has two possible air hose

configurations. In the standard configuration,

the air connection is at the base of the handle.

In the optional configuration, the air connection

is at the rear of the gun.

1. See FIG. 6. Remove air hose from nipple at

base of gun handle.

2. Remove nipple from gun handle.

3. Remove pipe plug from back of gun.

4. Install pipe plug in base of gun handle.

5. Install nipple in back of gun.

6. Connect air hose to nipple and use wrench

to tighten.

Always engage safety stop, close both man-

ual valves, and disconnect air before chang-

ing air hose configuration.

FIG. 6. Air Hose Configuration

Air Hose

Install Pipe Nipple

Remove

Pipe Plug

Install Pipe Plug

Remove Long Pipe Nipple

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