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)
!2
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
!2
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
2
!
Air Hose
Install Pipe Nipple
Remove
Pipe Plug
Install Pipe Plug
Remove Long Pipe Nipple