Graco 311321P - GX-7A, GX-7 DI, and GX-7 400 Spray Guns Owner's Manual

Operation, Parts, Service, Repair
GX-7A™, GX-7® DI, and GX-7 400
Spray Guns
311321P
EN
For use with non-flammable polyurethane foams, two-component coating systems
(polyureas), and some two-component epoxy systems. For professional use only.
See page 2 for model information.
3500 psi (24 MPa, 240 bar) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions
in this manual. Save these instructions.
!
2
GX-7 400
GX-7A
GX-7 DI
Models
Contents
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Important Two-Component Material Information . . . . . . 5
Isocyanate Conditions . . . . . . . . . . . . . . . . . . . . . . . . . 5
For all applications except spray foam . . . . . . . . . . . . . 6
Material Self-ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Keep Components A and B Separate . . . . . . . . . . . . . . 6
Moisture Sensitivity of Isocyanates . . . . . . . . . . . . . . . . 6
Foam Resins with 245 fa Blowing Agents . . . . . . . . . . . 7
Changing Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Overall View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Centerline Components . . . . . . . . . . . . . . . . . . . . . . . 10
Mixing Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Operation Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Isocyanate Hazard . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Keep A and B Components Separate . . . . . . . . . . . . . 13
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Safety Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Air Hose Connection . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Coupling Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Air Inlet Configuration . . . . . . . . . . . . . . . . . . . . . . . . . 16
Mixing Module and PCD Installation . . . . . . . . . . . . . . 17
Valving Rod Adjustment . . . . . . . . . . . . . . . . . . . . . . . 18
Valving Rod Adjustment . . . . . . . . . . . . . . . . . . . . . . . 18
Initial Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Daily Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Daily Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Pressure Relief Procedure . . . . . . . . . . . . . . . . . . . . . . . 21
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Gun Service Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Clean Spray Gun Procedure . . . . . . . . . . . . . . . . . . . . 22
Flush Gun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Service Screen Screw . . . . . . . . . . . . . . . . . . . . . . . . 24
Remove Centerline Components . . . . . . . . . . . . . . . . 24
Install Centerline Components . . . . . . . . . . . . . . . . . . 26
Replace End Cap and Air Piston Assembly . . . . . . . . 27
Replace Trigger Valve O-Rings . . . . . . . . . . . . . . . . . 28
Clean Mixing Module . . . . . . . . . . . . . . . . . . . . . . . . . 29
Install Mixing Module . . . . . . . . . . . . . . . . . . . . . . . . . 30
Clean Pattern Control Disc . . . . . . . . . . . . . . . . . . . . . 31
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
GX-7A Model Final Assembly . . . . . . . . . . . . . . . . . . . 32
GX-7 DI Model Final Assembly (295541) . . . . . . . . . . 34
GX-7 400 Model Final Assembly (295540) . . . . . . . . . 36
GX-7A Model Handle Assembly (24K734) . . . . . . . . . 38
GX-7 DI Model Handle Assembly (295809) . . . . . . . . 40
GX-7 400 Model Handle Assembly (24K733) . . . . . . . 42
Coupling Block Assembly (295383) . . . . . . . . . . . . . . 44
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
GX-7A Mix Module Kit . . . . . . . . . . . . . . . . . . . . . . . . 45
Set-Up Chart for GX-7A Model . . . . . . . . . . . . . . . . . . 46
GX-7 400 Mix Module Kit . . . . . . . . . . . . . . . . . . . . . . 47
Set-up Chart for GX-7 400 Model . . . . . . . . . . . . . . . 48
GX-7 DI Model Specifications . . . . . . . . . . . . . . . . . . . 49
Tip Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Tool Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . . . . . . 52
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Models
Includes:
2
Part No.
Description
295540
GX-7 400
295541
Mix Module
Tip
296859 (451)
296853 (212)
GX-7 DI - 4/213
296901 (4)
296706 (213)
295542
GX-7A - 1/90
296909 (1)
296712 (90)
295543
GX-7A - 10/210
296906 (10)
296704 (210)
295544
GX-7A - 3/70
296226 (3)
296710 (70)
295545
GX-7A - 5/70
296923 (5)
296710 (70)
311321P
Warnings
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
Always wear appropriate personal protective equipment and cover all skin when spraying, servicing equipment, or when in the work area. Protective equipment helps prevent serious injury,
including long-term exposure; inhalation of toxic fumes, mists or vapors; allergic reaction;
burns; eye injury and hearing loss. This protective equipment includes but is not limited to:
• A properly fitting respirator, which may include a supplied-air respirator, chemically
impermeable gloves, protective clothing and foot coverings as recommended by the fluid
manufacturer and local regulatory authority.
• Protective eyewear and 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 Safety Data Sheet (SDS) for handling instructions and to know the specific hazards
of the fluids you are using, including the effects of long-term exposure.
• When spraying, servicing equipment, or when in the work area, always keep work area
well ventilated and always wear appropriate personal protective equipment. See Personal
Protective Equipment warnings in this manual.
• 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
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.
• Engage trigger lock when not spraying.
• Follow Pressure Relief Procedure in this manual, when you stop spraying and before
cleaning, checking, or servicing equipment.
311321P
3
Warnings
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 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 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 EQUIPMENT HAZARD
Fluid from the gun/dispense valve, leaks, or ruptured components can splash in the eyes or on
skin and cause serious injury.
• Follow Pressure 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.
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.
4
311321P
Important Two-Component Material Information
Important Two-Component Material Information
Isocyanate Conditions
Spraying or dispensing fluids that contain isocyanates creates potentially harmful mists, vapors, and atomized
particulates.
•
•
•
•
•
•
•
Read and understand the fluid manufacturer’s warnings and Safety Data Sheet (SDS) to know specific hazards and precautions related to isocyanates.
Use of isocyanates involves potentially hazardous procedures. Do not spray with this equipment unless you
are trained, qualified, and have read and understood the information in this manual and in the fluid manufacturer’s application instructions and SDS.
Use of incorrectly maintained or mis-adjusted equipment may result in improperly cured material.which
could cause off gassing and offensive odors. Equipment must be carefully maintained and adjusted according to instructions in the manual.
To prevent inhalation of isocyanate mists, vapors and atomized particulates, everyone in the work area
must wear appropriate respiratory protection. Always wear a properly fitting respirator, which may include
a supplied-air respirator. Ventilate the work area according to instructions in the fluid manufacturer’s SDS.
Avoid all skin contact with isocyanates. Everyone in the work area must wear chemically impermeable
gloves, protective clothing and foot coverings as recommended by the fluid manufacturer and local regulatory authority. Follow all fluid manufacturer recommendations, including those regarding handling of contaminated clothing. After spraying, wash hands and face before eating or drinking.
Hazard from exposure to isocyanates continues after spraying. Anyone without appropriate personal protective equipment must stay out of the work area during application and after application for the time period
specified by the fluid manufacturer. Generally this time period is at least 24 hours.
Warn others who may enter work area of hazard from exposure to isocyanates. Follow the recommendations of the fluid manufacturer and local regulatory authority. Posting a placard such as the following outside
the work area is recommended:
TOXIC FUMES
HAZARD
DO NOT ENTER DURING
SPRAY FOAM APPLICATION
OR FOR ___ HOURS AFTER
APPLICATION IS COMPLETE
DO NOT ENTER UNTIL:
DATE: ____________
TIME: ____________
311321P
5
Important Two-Component Material Information
For all applications except spray
foam
Spraying or dispensing fluids that contain isocyanates creates potentially harmful mists, vapors, and atomized particulates.
•
Read and understand the fluid manufacturer’s warnings and Safety Data Sheet (SDS) to know specific
hazards and precautions related to isocyanates.
•
Use of isocyanates involves potentially hazardous procedures. Do not spray with this equipment unless you
are trained, qualified, and have read and understood
the information in this manual and in the fluid manufacturer’s application instructions and SDS.
•
Use of incorrectly maintained or mis-adjusted equipment may result in improperly cured material. Equipment must be carefully maintained and adjusted
according to instructions in the manual.
•
To prevent inhalation of isocyanate mists, vapors, and
atomized particulates, everyone in the work area must
wear appropriate respiratory protection. Always wear a
properly fitting respirator, which may include a supplied-air respirator. Ventilate the work area according
to instructions in the fluid manufacturer’s SDS.
•
Avoid all skin contact with isocyanates. Everyone in
the work area must wear chemically impermeable
gloves, protective clothing and foot coverings as recommended by the fluid manufacturer and local regulatory authority. Follow all fluid manufacturer
recommendations, including those regarding handling
of contaminated clothing. After spraying, wash hands
and face before eating or drinking.
Material Self-ignition
Some materials may become self-igniting if applied too
thick. Read material manufacturer’s warnings and Safety
Data Sheet (SDS).
6
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:
•
Never interchange component A and component B
wetted parts.
•
Never use solvent on one side if it has been contaminated from the other side.
Moisture Sensitivity of
Isocyanates
Exposure to moisture (such as humidity) will cause ISO to partially cure, forming small, hard, abrasive crystal that become
suspended in the fluid. Eventually a film will form on the surface and the ISO will begin to gel, increasing in viscosity.
NOTICE
Partially cured ISO will reduce performance and the life of all
wetted parts.
•
•
•
•
•
Always use a sealed container with a desiccant dryer in
the vent, or a nitrogen atmosphere. Never store ISO in
an open container.
Keep the ISO pump wet cup or reservoir (if installed)
filled with appropriate lubricant. The lubricant creates a
barrier between the ISO and the atmosphere.
Use only moisture-proof hoses compatible with ISO.
Never use reclaimed solvents, which may contain moisture. Always keep solvent containers closed when not in
use.
Always lubricate threaded parts with an appropriate
lubricant when reassembling.
NOTE: The amount of film formation and rate of crystallization
varies depending on the blend of ISO, the humidity, and the
temperature.
311321P
Important Two-Component Material Information
Foam Resins with 245 fa
Blowing Agents
Some foam blowing agents will froth at temperatures above
90°F (33°C) when not under pressure, especially if agitated.
To reduce frothing, minimize preheating in a circulation system.
Changing Materials
NOTICE
Changing the material types used in your equipment
requires special attention to avoid equipment damage
and downtime.
•
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.
•
When changing between epoxies and urethanes
or polyureas, disassemble and clean all fluid components and change hoses. Epoxies often have
amines on the B (hardener) side. Polyureas often
have amines on the B (resin) side.
311321P
7
Overall View
Overall View
Model GX-7A
Forward Stop
Locknut
Valving Rod Rear Stop
2
Air Cap Adjustment Valve
!
Gun Block
Valving Rod Forward Stop
Rear Packing Nut
Manual Valves
Trigger
FIG. 1: GX-7A Overall View
Model GX-7 DI
FIG. 2: GX-7 DI Overall View
8
311321P
Overall View
Forward Stop
Locknut
Model GX-7 400
Valving Rod
Rear Stop
2
!
Gun Block
Air Cap Valve
Valving Rod
Trigger
Forward Stop
Rear Packing Nut
FIG. 3: GX-7 400 Overall View
311321P
9
Overall View
Centerline Components
Model GX-7A
A-Screen Screw
Valving Rod
Check Valve
Rear Packing
Screen
Screw
Seal
Gun Block
Packing
Nut
Screen
Rear Packing
Retainer
Mixing
Module
PCD Body
Screen
O-ring
Screen
Screw Seal
Air Cap
Front Packing
Check Valve
Assembly
R-Screen Screw
Coupling Block
Gasket
Pattern Control
Disc (PCD)
PCD Retainer
FIG. 4: GX-7A Centerline Components
R-Screen Screw
Model GX-7 DI
Rear Seal Gland
Screen
Rear Packing
Rear Seal Retainer
Assembly
Gun Block
Check Valve
Mixing Module
Check Valve
Mixing Module
Retainer
Screen
PCD
Retainer
Pattern Control
Disc (PCD)
Air Cap
Coupling Block
Gasket
A-Screen
Screw
Coupling Block
Mounting Screw
FIG. 5: GX-7 DI Centerline Components
10
311321P
Overall View
Model GX-7 400
R-Screen Screw
Spring
Rear Packing
Rear Packing
Retainer
Valving Rod
Screen
Screw Seal
Rear Seal Retainer
Check Valve
Check Valve
Mixing Module
Screen
Pattern Control
Disc (PCD)
PCD Retainer
Gun Block
Air Cap
Coupling Block
Gasket
Coupling Block
Mounting Screw
Screen Screw Seal
A-Screen Screw
FIG. 6: GX-7 400 Centerline Components
311321P
11
Overall View
Mixing Module
All gun models employ the concept of impingement mixing through the use of a single-part
MIXING MODULE. This system is cleaned by
a mechanical self-cleaning process, eliminating the need for solvent or air purging between
dispenses.
The gun can be assembled with two styles of
mixing components; their selection is dependent upon the type of system sprayed. The
Set-Up Charts on pages 46 and 48 show several of the more common sets of these configurations.
The Mixing Module, in combination with a Pattern Control Disc (PCD), produce a thoroughly
mixed chemical and reliable spray patterns.
The module can be set up to spray at its maximum rated output. Additionally, by changing to
a smaller PCD the module can spray at the low
outputs and pressures that are required for
detail work.
Valving Rod
Mixing Module (round or flat)
PCD (round or flat)
FIG. 8: GX-7 400 Mixing Module
Valving Rod
Mixing Module (round or flat)
PCD (round or flat)
PCD (round or flat)
FIG. 9: GX-7 DI Mixing Module
Valving
Rod
Mixing Module
(round or flat)
FIG. 7: GX-7A Mixing Module
12
311321P
Operation Basics
Operation Basics
Grounding
To prevent accidental gun operation, always
disconnect air supply before servicing gun or
anytime gun is not in use.
Isocyanate Hazard
Check your local electrical code and proportioner manual for detailed grounding instructions.
Ground the spray gun through connection to a
Graco-approved grounded fluid supply hose.
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 providing sufficient ventilation in the work area. If
sufficient ventilation is not available, a supplied-air respirator is required for everyone in
the work area.
To prevent contact with isocyanates, appropriate personal protective equipment, including chemically impermeable gloves, boots,
aprons, and goggles, is also required for
everyone in the work area.
Safety Position
The guns have a two-position valving rod rear
stop. The SERVICE position allows for minimal
rearward travel of valving rod but will not allow
chemical to discharge. The OPEN position
allows full rearward travel of valving rod and
permits gun to dispense. Whenever gun is not
spraying, set to SERVICE position.
Engage Safety Stop
To engage safety stop, push in and turn safety
stop clockwise to place gun in CLOSED (SERVICE) position.
Keep A and B Components
Separate
CLOSED (SERVICE)
CAUTION
To prevent cross-contamination of the gun’s
wetted parts, do not interchange A component (isocyanate) and B component (resin)
parts. The gun is shipped with the A side on
the left.
311321P
When not spraying in
safety position.
FIG. 10: Safety Stop - Closed
13
Operation Basics
Disengage Safety Stop
Air Hose Connection
To disengage safety stop, push in and turn
safety stop counterclockwise to place gun in
OPEN position (red band is exposed).
Connect Air Hoses
Red Band
Pull back sleeve of female fitting, insert male
fitting and slide sleeve forward to secure connection.
Disconnect Air Hoses
Pull back sleeve of female fitting and pull out
male fitting.
OPEN
Red band exposed
when spraying.
Pull Sleeve
FIG. 11: Safety Stop - Open
Close Manual Valves
Closing manual valves prevents chemicals in
heated hoses from entering gun. For your own
safety, close manuals valves before servicing
gun.
FIG. 13: Disconnect Air Hose
Manual Valves rotate clockwise to
close.
FIG. 12: Close Manual Valves
14
311321P
Operation Basics
Coupling Block
Chemical hoses are joined to gun block by
coupling block to ease installation and removal
of gun.
Manual Valves
Two manual valves located on coupling block
control flow of each chemical component to
gun.
Close Manual Valves
Use 5/16 in. nut driver to turn manual valve
fully clockwise.
CAUTION
To prevent accidental gun operation, always
set safety stop to CLOSED (SERVICE),
close both manual valves, and disconnect air
supply.
Installation and Removal
Triggering gun with manual valves closed
may cause crossover if any residual chemical remains in gun ports.
To prevent release of pressurized chemicals,
close both manual valves before removing
coupling block.
Never open manual valve unless coupling
block is secured to gun or unless you point
gun into waste container.
Open Manual Valves
Use 5/16 in. nut driver to turn manual valve
counterclockwise three full turns.
Install Coupling Block
1. Replace nicked, damaged, or worn coupling block gaskets.
2. With gaskets in place, fit coupling block to
gun block.
Coupling
Block
Manual Valves
FIG. 14: Open Manual Valves
311321P
15
Operation Basics
3. Insert coupling block mounting screw and
use 5/16 in. nut driver to tighten to gun
block.
Optional Configuration
Refer to page 44. If bottom-mount hose connection is desired, alternate swivel fitting (2
and 3) with pipe plugs (1). Use pipe thread
sealant. Do not cross-over which side each fitting is on.
Air Inlet Configuration
Coupling Block
Gaskets
There are two configurations for the air inlet. In
the standard configuration the air inlet is at the
base of the handle, and in the alternate configuration the air inlet is at the rear of the gun.
Pipe
Plug
Coupling Block
Mounting Screw
FIG. 15: Install Coupling Block
Optional Pipe
Nipple
Remove Coupling Block
1. Set safety stop to CLOSED (SERVICE).
2. Disconnect air hose.
Pipe Nipple
3. Close both manual valves.
4. Remove coupling block mounting screw.
5. Separate coupling block from gun.
FIG. 16: Air Inlet Configuration
6. Wipe mating surfaces of gun block and
coupling block to remove residual chemical.
To change to alternate configuration,
7. Cover exposed openings with grease.
2. Remove pipe plug from rear of gun.
1. Remove pipe nipple.
3. Install pipe plug in location previously occupied by pipe nipple.
4. Install pipe nipple in location previously
occupied by pipe plug.
16
311321P
Operation Basics
Mixing Module and PCD
Installation
f. Use wrench to loosen piston locknut.
Turn valving rod rearward as far as it
will turn.
1. Install mixing module:
a. Disconnect gun from coupling block.
b. Connect air supply to gun.
g. Place and orient PCD over mixing module retainer.
h. Install PCD retainer and hand tighten
(GX-7 DI model only).
c. Set safety stop to OPEN.
i.
d. Hold down trigger and place module
over tip of valving rod.
e. Align keying pin with hole in gun block
and push in firmly (GX-7 DI model only).
Install PCD retainer and wrench tighten
(GX-7 model only).
3. Adjust valving rod. See procedure for
appropriate gun model.
4. Set safety stop to OPEN position.
f. Install front packing into module retainer
(GX-7 model only).
g. Install module retainer, hand tight.
Release trigger.
h. Use wrench to strongly tighten module
retainer (250 in.-lbs.).
GX-7 DI model only: use wrench to
tighten module retainer (150 in.-lbs.).
DO NOT OVERTIGHTEN.
2. Install PCD:
5. Check adjustment of valving rod:
a. With air supply connected, hold down
gun trigger and loosen PCD retainer.
Release trigger.
b. Hand tighten PCD retainer.
c. While maintaining tightening torque,
trigger gun. Retainer should rotate
approximately 1/10 of turn.
d. Release trigger.
a. Disconnect air supply from gun.
b. Loosen forward stop screw (GX-7
model only).
c. Turn forward stop nut clockwise (as
viewed from front of gun) 1-2 turns
(GX-7 model only).
d. Slightly loosen rear seal retainer
assembly.
e. Remove safety stop.
311321P
17
Operation Basics
Valving Rod Adjustment
GX-7A and GX-7 400 Models Only
1. Push in rear stop to SERVICE position.
2. If attached, turn both manual valves fully
clockwise to close (see Manual Valves,
page 15).
3. Connect air line from gun to air source to
pressurize air cylinder forward to CLOSED
position.
FIG. 18: One Wrench Flat
4. Loosen forward stop locknut.
Valving Rod Adjustment
GX-7 DI Model Only
Valving rod requires adjustment in only the following instances:
Forward Stop
Locknut
•
•
•
disassembly and service of air cylinder
changing valving rod
changing mixing module
1. Clean gun according to Clean Spray Gun
Procedure, page 22.
Forward
Stop
2. Connect air supply to gun.
3. Loosen rear seal retainer assembly one or
two turns.
FIG. 17: Forward Stop
5. Completely loosen (full CCW) forward
stop. Then slowly tighten (CW) forward
stop until a snug resistance is felt. From
this point, reverse and loosen approximately 1/16 of a turn.
6. Tighten forward stop locknut. Do not overtighten. If locknut bottoms out before resistance is felt, replace friction plug.
As a reference point, movement of one
wrench flat corresponds to 1/6 turn.
4. Loosen locknut from valving rod three or
four turns.
5. Set safety stop to OPEN.
6. Use 5/16 in. nut driver through rear of gun
to thread valving rod forward to engage
PCD. When valving rod contacts PCD
tighten another 1/10 turn.
7. Carefully maintain position of valving rod
and tighten locknut against piston rod.
8. Retighten rear seal retainer assembly.
18
311321P
Operation Basics
Initial Set Up
5. Bleed air from chemical hoses.
a. Use separate waste containers for
A-ISO and R-Resin.
1. Install female quick disconnect fitting to air
supply hose bundled with chemical supply
hoses.
2. Connect coupling block to hose bundle.
Connect A-Isocyanate hose (red-tape) to
notched fitting on coupling block. Connect
R-Resin hose (blue-tape) to fitting without
notches on coupling block.
3. Close both manual valves.
4. Pressurize A and R chemical hoses. Check
for leaks. See Proportioner manual.
b. Hold coupling block with exit ports
pointed into waste container.
c. Open one manual valve at a time to dispense into waste container.
d. Bleed each side until chemical leaving
hoses is free of air.
e. Close both manual valves.
6. Use cloth soaked in gun cleaner to clean
coupling block and mating surfaces.
7. Set safety stop to CLOSED (SERVICE).
8. Install coupling block to gun.
9. Proceed with daily start-up and shutdown
procedures.
311321P
19
Operation Basics
Daily Start-up
Ensure gun is attached to coupling block and
air hose. Ensure proportioning unit is at
desired temperature and pressure. Properly
ground equipment to avoid static sparking that
may result in fire or explosion.
Daily Shutdown
Follow daily shutdown procedure when
gun is out of service for any length of time,
or for mid- or end-of-day service. See
Clean Spray Gun Procedure, page 22.
1. Connect air supply to gun.
1. Set safety stop to OPEN.
2. Adjust air cap adjustment valve. Turn knob
counterclockwise to open valve and clockwise to close valve
2. Close both manual valves.
3. Adjust rear seal retainer.
4. Shutdown proportioning unit as required.
See Proportioner manual.
4. Open both manual valves. See Coupling
Block section, page 15.
5. Set safety stop to OPEN.
6. Test spray on disposable surface.
20
3. Disconnect air supply from gun.
5. Clean as required. See Clean Spray Gun
Procedure, page 22.
Do not disassemble gun daily for cleaning
if it is operating properly. However, if gun
is removed from coupling block, it must be
flushed and cleaned thoroughly.
311321P
Pressure Relief Procedure
Pressure Relief Procedure
4. Release gun trigger, set safety stop to
CLOSED, and close manual valves.
Relieve pressure before cleaning or repairing
gun.
1. Close both manual valves.
If fluid in hose and proportioner is still under
pressure, follow Pressure Relief Procedure in
proportioner manual
To relieve pressure in hose after gun is
removed, place fluid manifold over containers,
facing away from you. Very carefully open fluid
valves. Under high pressure, fluid will spray
sideways from fluid ports. See FIG. 21.
Manual Valves
FIG. 19: Close Manual Valves
2. Set safety stop to OPEN.
3. Trigger gun onto cardboard or into waste
container to relieve pressure.
TI2484a
FIG. 21: Open Manual Valves
2
!
FIG. 20: Trigger Gun
311321P
21
Maintenance
Maintenance
Use supplied tool kit 296835. See Tool Kit,
page 50.
Gun Service Kits
Use either the 1-Quart Gun Service Kit
(296980) or 3-Gallon Gun Service Kit (296981)
to perform daily flushing of spray gun without
disassembly.
FIG. 23: 3-Gallon Gun Service Kit
For more information about the 3-Gallon Gun
Service Kit, see Manual 311341.
Clean Spray Gun Procedure
FIG. 22: 1-Quart Gun Service Kit
For more information about the 1-Quart Gun
Service Kit, see Manual 311340.
To avoid static sparking that may result in fire
or explosion, ensure all equipment in cleaning
procedure is grounded. Do not clean on or
near foamed or coated surfaces or any other
flammable surfaces or objects.
Thoroughly flush gun block with gun cleaner
before removing valving rod or mixing components from gun block. Also allow chemicals in
spray gun to cool before cleaning.
This procedures makes use of the 1-Quart or
3-Gallon Gun Service Kit.
1. Set safety stop to CLOSED (SERVICE).
2. Close both manual valves.
22
311321P
Maintenance
3. Remove gun from coupling block.
Flush Gun
4. Attach service block of gun service kit to
spray gun, and then tighten using 5/16 in.
nut driver.
5. Pressurize Service Kit container up to 100
psi. DO NOT EXCEED 100 psi (0.7 MPa, 7
bar).
To avoid static sparking that may result in fire
or explosion, ensure all equipment in flushing
procedure is grounded. Do not flush on or
near foamed or coated surfaces.
6. Open one manual valve on service block.
1. Set safety stop to CLOSED (SERVICE).
7. Connect air to gun. Set safety stop to
OPEN.
2. Close both manual valves.
8. Hold gun against grounded waste container.
3. Loosen R-Screen screw and then remove
by hand.
9. Trigger gun and 1-Quart Gun Service Kit.
Spray into waste container until there is a
fine, unobstructed mist of gun cleaner.
4. Use flush can to thoroughly flush screen
screw and screen screw cavity.
10. Release both triggers and close manual
valve on service block.
11. Repeat steps 5-7 for other side of gun.
12. After initial cleaning, remove air cap, PCD
retainer, and PCD. Flush a second time to
ensure thorough cleaning.
5. Loosen A-Screen screw and then remove
by hand.
6. Use flush can to thoroughly flush screen
screw and screen screw cavity.
7. Service gun by following Maintenance procedures, page 22.
13. Remove service block of gun service kit
from spray gun.
14. Set safety to CLOSED (SERVICE).
15. Disconnect air supply.
16. Clean screens, check valves and screen
screw as required. See Service Screen
Screw, page 24.
Inspect air cap, PCD, mixing module, and
gun block for build up of material and clean
as required.
Do not use metal cleaning devices to clean
plastic components.
311321P
23
Repair
Repair
Remove Centerline
Components
Shutdown proportioner and allow chemicals to
cool before servicing gun.
Refer to FIG. 4 through FIG. 6 for diagrams of
centerline components for all gun models.
Clean A and R components in separate containers to avoid cross contamination.
1. Flush gun according to Clean Spray Gun
Procedure, page 22.
Service Screen Screw
2. Connect air supply to gun. Set safety stop
to OPEN.
1. Flush gun according to Clean Spray Gun
Procedure, page 22.
2. Unthread screen screw from gun block.
3. Remove check valve from screen screw.
Clean valve with gun cleaner and inspect
for damage. Replace if necessary.
4. Remove screen from screen screw. Soak
in gun cleaner or replace if clogged or dirty.
5. Clean screen screw cavity. If any particles
are visible, clean with clean out drills and
flush with gun cleaner.
CAUTION
Any material left in cavity on downstream
side of screen will clog mixing module.
6. Inspect screen screw seal for damage.
Replace if necessary.
7. Reinstall screen screw in gun block. Make
sure it is tight.
8. Flush gun with mixing module removed.
3. Remove air cap.
4. Trigger gun and hold it to relieve pressure
on PCD retainer.
5. Remove PCD retainer by turning it counterclockwise.
6. Remove PCD from mixing module retainer.
To remove PCD that is stuck, set safety
stop to OPEN, depress and release gun
trigger to unseat it. Set safety stop to
CLOSED (SERVICE).
7. Remove mixing module retainer.
8. Set safety stop to OPEN. Depress and
release gun trigger to unseat it. Remove
mixing module off end of valving rod. Set
safety stop to CLOSED (SERVICE).
CAUTION
Do not use sharp objects or metal tools to
remove mixing module.
9. Loosen rear packing nut 1-2 turns.
10. Push safety stop partially forward, rotate it
counterclockwise, and slide off air cylinder.
24
311321P
Repair
12. Inspect valving rod for damage and replace
as required. Clean and remove any buildup
of mixed material from rod using cloth
soaked in gun cleaner or fine steel wool.
11. Remove valving rod.
Rod Draw Bar
Valving Rod
Rear Stop
If valving rod is replaced, it is recommended to reset forward stop.
13. Disconnect air supply.
FIG. 24: Remove Valving Rod (GX-7 DI model)
14. Remove gun block retaining screw. Carefully slide gun block away from air cylinder.
If dried chemical is built up on gun block,
remove dried chemical before you remove
gun block.
15. Clean all components thoroughly. Use
brushes and clean-out tools to remove
residual chemical from metal components.
Use cotton swabs soaked in gun cleaner to
clean plastic components.
Valving Rod
Rear Stop
16. Coat threads and mating surfaces of gun
block and gun block bracket with Lubriplate
grease, and reassemble.
17. Inspect gun block for damage.
FIG. 25: Remove Valving Rod (GX-7A and
GX-7 400 models)
a. Depress trigger lever and hold.
GX-7 DI model only: loosen piston stop
locknut until it disengages from thread
on valving rod.
b. Use 5/16 in. nut driver to unthread valving rod from rear of gun.
c. When threads disengage remove
assembly by hand.
311321P
25
Repair
Install Centerline
Components
11. Install PCD over end of mixing module
retainer.
GX-7 DI Model Only
12. Thread PCD retainer onto gun block. Hand
tight.
Before installation, ensure all gun components
are clean and dry. Lubricate all moving parts
and threads.
13. Rotate flat PCD to adjust orientation as
required.
1. Install rear packing gland with packing
wrench. Tighten onto gun block.
14. Adjust valving rod. See Valving Rod
Adjustment, page 18.
15. Thread air cap into place; hand tight.
2. Install rear packing retainer loosely.
3. Install valving rod. Use 5/16 in. nut driver to
thread assembly tight into end cap.
GX-7 DI model only: thread rod until
approximately 3/16 in. to 1/4 in.of thread
protrudes from end of piston rod.
16. Slide safety stop onto rear of air cylinder.
Push safety stop partially forward and
rotate clockwise to set to OPEN.
17. Set safety stop to CLOSED (SERVICE).
4. Thread locknut onto valving rod by hand.
5. Carefully slide gun block onto valving rod
toward air cylinder. Install gun block onto
gun block mounting bracket.
6. Install safety stop; leave in OPEN position.
7. Connect air supply to gun.
8. Depress gun trigger and slide mixing module over end of valving rod.
GX-7 DI model only: ensure valving rod
alignment pin enters alignment slot in gun
block.
Keep gun trigger depressed.
9. With gun trigger depressed, thread mixing
module retainer or PCD body with packing
installed, by hand, and then wrench tighten.
CAUTION
To avoid damage to module and gun block,
do not over-tighten mixing module retainer.
10. Release gun trigger.
26
311321P
Repair
Replace End Cap and Air
Piston Assembly
10. By hand, pull piston assembly out of air cylinder and inspect o-ring for damage.
Replace if necessary. Apply Lubriplate
grease prior to installation.
End Cap
Spacer
Piston Assembly
Front U-Cup Seal
Piston
Spring
ensure “cup” faces front of air cylinder
when replacing.
Rear
U-Cup
Seal
Socket Head Cap Screw
Cylinder Clamp
GX-7 DI Shown
FIG. 26: GX-7 DI End Cap and Air Piston
Assembly
1. Clean gun according to Clean Spray Gun
Procedure, page 22.
11. If air was escaping around piston rod
during operation, replace front u-cup seal
or o-ring. Apply Lubriplate grease and
ensure “cup” faces rear of air cylinder.
12. Insert piston and rod assembly into air cylinder. Take care to not damage front cup
seal as rod passes through.
13. Insert piston spring. (For GX-7 DI models,
also insert piston spacer.)
14. Reinstall end cap into air cylinder.
15. Retighten rear socket head cap screw and
cylinder clamp to handle.
2. Loosen rear packing nut 1-2 turns.
16. Reinstall valving rod. Connect valving rod
to draw bar. Lubricate and thread into end
cap.
3. Push safety stop partially forward, rotate
counterclockwise, and slide safety stop off
air cylinder.
17. Adjust valving rod; see Valving Rod
Adjustment, page 18.
4. Remove valving rod. See Remove Centerline Components, page 24.
18. Slide safety stop onto rear of air cylinder.
Push safety stop partially forward and
rotate clockwise to set to OPEN.
5. Disconnect air supply from gun.
19. Set safety stop to CLOSED (SERVICE).
6. Remove rear head cap screw and cylinder
clamp from handle.
20. Tighten rear packing nut.
7. Remove end cap from air cylinder.
8. Inspect end cap o-ring. Replace if damaged. Install new end cap o-ring after lightly
coating it with Lubriplate grease.
9. Inspect rear U-cup seal or o-ring for damage. Replace if necessary. If removed,
311321P
27
Repair
Replace Trigger Valve
O-Rings
8. Remove rear internal pipe plug (under pipe
plug).
1. Clean gun according to Clean Spray Gun
Procedure, page 22.
9. Use pin punch and hammer to gently tap
spring seat until it and valve liner push out
opposite end of hole.
2. Disconnect air supply from gun.
Refer to Parts, page 32.
10. Remove 4 o-rings on liner.
11. Apply thick coat of Lubriplate grease to
new o-rings and install.
12. Clean valve hole. Remove any dirt and
debris. Apply thick coat of Lubriplate
grease to inside of valve hole.
13. Slide spring seat into gun handle air valve
hole, tapered end first, until it bottoms out.
FIG. 27: Replace Trigger Valve O-Ring
14. Push valve liner in as far as it will go. Temporarily screw in valve retainer nut, which
aligns valve liner and valve spool. Remove
valve retainer nut.
3. Remove mounting screw and locknut that
hold trigger in place. Remove trigger.
15. With valve spool spring in place, insert
valve spool into valve liner. Screw in valve
retainer nut. Do not overtighten.
4. Remove valve retainer nut.
5. Pull out valve spool and valve spring.
Remove old o-rings.
6. Prior to installation, liberally lubricate all
o-rings with lubricant provided in Rebuild
kit.
16. Apply small amount of pipe thread sealant
to 1/16 in. pipe plug threads. Screw pipe
plug in place.
17. Apply small amount of pipe thread sealant
to 1/8 in. pipe plug (or 1/8 in. pipe nipple)
and install.
18. Reinstall trigger using screw and locknut.
Follow steps 7-15 to replace o-rings on
valve liner. If o-rings do not need to be
replaced, go to step 16.
7. Remove pipe plug from rear of gun handle.
For guns configured with air inlet at rear of
gun handle, pipe nipple replaces pipe plug.
Remove pipe nipple.
28
311321P
Repair
Clean Mixing Module
1. Flush gun according to Clean Spray Gun
Procedure, page 22.
2. Connect air supply to gun. Set safety stop
to OPEN.
3. Remove air cap by hand.
GX-7A and GX-7 400 Models Only
Air cap and PCD retainer may be difficult
to separate during disassembly due to
overtightening or hardened mixed material. Fit the side of the stamped 5/8 in.
wrench into the groove to separate. When
reinstalling, apply lubricant to threads.
8. Set safety stop to OPEN. Depress and
release gun trigger to unseat it. Remove
mixing module from end of valving rod. Set
safety stop to CLOSED (SERVICE).
9. Inspect valving rod for damage and replace
as required. Use cloth soaked in gun
cleaner or steel wool to clean and remove
buildup of mixed material from rod.
If the valving rod is replaced, reset forward
stop.
10. Clean mixing module.
Ensure cleanout tool size matches module
size used. See the Set-Up Charts on
pages 46 and 48.
a. Insert cleanout tool into pin vise.
b. Use cleanout tool to clean module
ports. Take care not to insert tool too far
causing damage to inside bore of module. Use cotton swab soaked in gun
cleaner to clean bore of module.
FIG. 28: Unthread Cap from PCD Body
4. Trigger gun and hold it to relieve pressure
on PCD retainer.
5. Remove PCD retainer by turning it counterclockwise.
6. Remove PCD from mixing module retainer.
To remove PCD that is stuck, set safety
stop to OPEN, depress and release gun
trigger to unseat it. Set safety stop to
CLOSED (SERVICE).
FIG. 29: Clean Module Ports
7. Remove mixing module retainer.
311321P
29
Repair
Install Mixing Module
1. Install safety stop; leave in OPEN position.
11. Slide safety stop onto rear of air cylinder.
Push safety stop partially forward and
rotate clockwise to set to OPEN.
2. Connect air supply to gun.
3. Depress gun trigger and slide mixing module over end of valving rod.
GX-7 DI model only: ensure valving rod
alignment pin enters alignment slot in gun
block.
Keep gun trigger depressed.
4. With gun trigger depressed, thread mixing
module retainer or PCD body with packing
installed, by hand, and then wrench tighten.
CAUTION
Module
PCD Body
PCD
Note orientation of
fan tip
Air Cap
Front Packing
Retainer O-Ring
PCD Retainer
FIG. 30: Install Mixing Module
To avoid damage to module and gun block,
do not overtighten mixing module retainer.
5. Release gun trigger.
6. Install PCD over end of mixing module
retainer.
7. Thread PCD retainer onto gun block. Hand
tight.
8. Rotate flat PCD to adjust orientation as
required.
9. Adjust valving rod. See Valving Rod
Adjustment, page 18.
10. Thread air cap into place; hand tight.
30
311321P
Repair
Clean Pattern Control Disc
1. Set safety stop to CLOSED (SERVICE).
2. Close both manual valves.
3. Turn off air to air cap.
4. Use cotton swab soaked in gun cleaner to
clean external surface of material build up.
Light scrubbing with impinger cleanout
brush may also be required.
a. Trigger gun to SERVICE position and
clean orifice area.
It is not always possible to clean all material build-up from PCD while assembled to
gun. In this case, remove PCD and clean
inside radius of disc.
Pattern Control
Disc (PCD)
GX-7A Model Shown
FIG. 31: Pattern Control Disc (PCD)
311321P
31
Parts
Parts
GX-7A Model Final Assembly
Part Numbers 295542, 295543, 295544, 295545
1
6
7
25
8
22
9
5
24
R
11
12
9
A
23
8
13
7
16
21
10
14
20
15
18
17
2, 26
19
4
3
32
311321P
Parts
GX-7A Model Final Assembly
Part Numbers 295542, 295543, 295544, 295545
Ref.
1
2
3
4
5
6
7
8
9
Part
295810
15B772
295596
295597
296834
296693
296723
296792
296724
296722
10
11
295384
12
13
14
15
16
17
18
19
296976
296978
295868
296832
296831
296128
295433
296979
20
296833
21
22
23
296828
296829
24
25
26
296830
16K136
100030
311321P
Description
Qty.
Spray gun handle
1
Air hose
1
Coupler plug
1
Coupler
1
R-gun block screen screw
1
assembly (includes 6, 7, 8, 9)
R-gun block screen screw
1
Screen screw seal (pack of 2)
Screen screw seal (pack of 10)
Screen, 80 mesh (pack of 10)
Screen, 80 mesh (pack of 50)
Check valve assembly
(pack of 10)
Gun block
1
Module; see GX-7A Mix Mod1
ule Kit, page 45
PCD body
1
Tip; see Tip Kits, page 50
1
Front packing (pack of 5)
1
O-ring
1
PCD retainer
1
Air cap
1
Coupling block gasket (pkg 2)
1
Coupling block mounting screw
1
Coupling block mounting screw
kit (pack of 2)
A-gun block screen screw
1
assembly (includes 6, 8, 9, 21)
A-gun block screen screw
1
Rear packing retainer
1
Rear seal packing
(pack of 5)
Rear seal retainer
1
Valving rod
1
Fitting
1
33
Parts
GX-7 DI Model Final Assembly (295541)
5
1
19
8
6
7
9
18
17
10
11
12
7
6
13
14
16
15
3
4
2, 21
34
311321P
Parts
GX-7 DI Model Final Assembly (295541)
Ref.
1
2
3
4
5
6
7
Part
295809
15B772
295596
295597
295835
296792
296724
296713
8
9
295860
10
11
12
13
14
295837
15
295433
296979
16
17
18
19
20
21
295834
295836
296864
296829
295383
100030
296865
295838
296128
311321P
Description
Qty.
Spray gun handle assembly
1
Air hose, 1/4 in. x 23 in. (FXF)
1
Coupler plug
1
Coupler
1
R-screen screw
1
Screen, 80 mesh (pack of 10)
Screen, 80 mesh (pack of 50)
Check valve assembly
2
(pack of 2)
Gun block
1
Module; see GX-7 DI Model
1
Specifications, page 49
Module retainer
1
Tip; see Tip Kits, page 50
1
Tip retainer
1
Air cap
1
Coupling block gasket
(pack of 2)
Coupling block mounting screw
1
Coupling block mounting screw
(pack of 2)
A-screen screw
1
Rear seal gland
1
Rear seal retainer assembly
1
Rear seal packing (pack of 5)
Coupling block (not shown)
1
Fitting
1
35
Parts
GX-7 400 Model Final Assembly (295540)
7
11
12
8
9
14
6
16
18
23
R
6
A
21
15
9
20
12
10
5
19
22
2
1, 24
13
4
3
36
311321P
Parts
GX-7 400 Model Final Assembly (295540)
Ref. Part
Description
Qty.
1
15B772 Air hose
1
2
296128 Coupling block gasket
(pack of 2)
3
295596 Coupler plug
1
4
295597 Coupler
1
5
295384 Gun block (includes 13)
1
6
296722 Check valve assembly
(pack of 10)
7
295799 Spray gun handle assembly
1
8
16K136 Valving rod
1
9
296792 Screen-80, mesh (pack of 10)
296724 Screen-80, mesh (pack of 50)
10
A-Screen screw
1
11
R-Screen screw
1
12 296693 Screen screw seal (pack of 2)
296723 Screen screw seal (pack of 10)
13 295433 Coupling block mounting screw
1
296979 Coupling block mounting screw
kit (pack of 2)
14 296828 Rear packing retainer
1
15 296829 Rear seal packing
1
(pack of 5)
16 296830 Rear seal retainer
1
18
Module; see GX-7 400 Mix
1
Module Kit, page 47
19 296836 Retainer
1
20 296837 Air cap
1
21
Tip; see Tip Kits, page 50
1
22 296833 A-gun block screen screw
assembly
(includes 6, 9, 10, 12)
23 296834 R-gun block screen screw
assembly
(includes 6, 9, 10, 12)
24 100030 Fitting
1
311321P
37
Parts
GX-7A Model Handle Assembly (24K734)
6
3
2
8
27
7
18
9
12
14
37
15
4
27
10
36
32
17
11
16
42
28
39
19
41
43
34
24
26
38
40
28
35
1
23
30
13
27
21
33
38
5
20
311321P
Parts
GX-7 Model Handle Assembly (24K734)
Ref.
1
2
3
4
5
Part
296862
295678
295676
295675
295709
6
7†
8
9†
10
11†
12
13
14
15†
16
17
18
19
295680
295681
16K136
295683
295663
514279
295664
295665
295666
295667
295673
295677
295668
295669
20 295671
21 295688
23 295686
24 295689
26 296971
27†106555
28†C20988
30 295438
32† 295405
33 295692
34 295684
35
36†
37†
38
295687
295674
295706
295693
39
295662
40
103656
41
42
295690
C20003
43† 295685
311321P
Description
Qty.
Spray gun handle
1
Cylinder end cap assembly
1
Spring
1
Air cylinder
1
Socket head cap screw,
2
8-32 x 3/4 in.
Two position stop
1
O-ring
1
Valving rod
1
O-ring
1
Cylinder front stop
1
O-ring
1
Air piston assembly
1
Pipe nipple
1
Stop clamp screw
1
Nylon pellet
1
Gun block mount
1
Air needle valve
1
Spring
1
Socket head cap screw,
1
1/4-28 x 5/8
Trigger mounting screw
1
Valve nut
1
Spool valve liner
2
Spring seat
1
Air valve spring
1
O-ring,
6
O-ring, fluoroelastomer
Locknut, elastic stop nut,
5-40
Needle valve packing
Spray gun trigger
Socket head cap screw,
10-32 x 1/2
Spool valve
Gasket
O-ring, Neoprene
Pipe plug, flush seal, 1/6
NPT
Pipe plug, flush seal, 1/8
NPT
Hex nipple, 1/8 NPT
(optional)
Cylinder clamp
Socket head cap screw,
10-32 x 1/2
O-ring
† Parts included in Handle Seal Rebuild Kit
296895 (purchase separately).
 Parts included in Trigger valve rebuild kit
296897 (purchase separately).
 Valving rod 16K136 is shipped loose.
3
1
1
1
4
1
1
1
1
1
1
1
1
2
39
Parts
GX-7 DI Model Handle Assembly (295809)
25
10
9
18
12
2
17
34
11
19
13
20
14
3
40
15
34
22
29
16
31
30
7
24
27
37
8
33
38
36
39
30
5
4
1
32
21
28
6
35
40
26
23
311321P
Parts
GX-7 DI Model Handle Assembly (295809)
Ref.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19†
20†
21
22
Part No.
296862
295714
295715
295686
295687
295688
295689
295690
295716
295717
295718
296736
295720
295712
295721
295713
296863
295676
295681
295683
295665
295669
23
24
25
295671
295431
295722
26
295709
27 295662
28 106555
29† C20988
30†103337
31 295684
32
33†
34†
35
36
37
295438
295685
295496
295692
295693
C20003
38 295442
39 103656
40† 103338
Description
Qty.
Gun handle
1
Cylinder end cap assembly
1
Air cylinder
1
Valve liner
1
Valve spool
1
Valve retainer nut
1
Spring seat
1
Cylinder clamp
1
Stop, stroke, long
1
Two position stop body
1
Stroke spacer
1
Valving rod holder kit
1
Piston spring
1
Piston assembly
1
Gun block mount
1
Air needle valve
1
Valving rod, 125 SS
1
Spring
1
O-ring
1
O-ring
1
Pipe nipple
1
Socket head cap screw,
1
1/4-28 x 5/8
Trigger mounting screw
1
Locknut
1
Flat head cap screw,
1
10-32 x 1/4 in.
Socket head cap screw,
2
8-32 x 3/4 in.
Pipe plug, flush seal, 1/8 in.
1
O-ring, fluoroelastomer
4
O-ring, fluoroelastomer
1
O-ring, fluoroelastomer
3
Socket head cap screw,
4
10-32 x 5/8 in.
Stop nut, elastic
1
O-ring
2
U-cup
2
Trigger
1
Pipe plug, flush seal, 1/16 in.
1
Socket head cap screw,
1
10-32 x 1/2
Spring
1
Hex nipple (optional), 1/8
1
MPT
O-ring, fluoroelastomer
1
† Parts included in Air Cylinder Rebuild Kit
296895 (purchase separately).
 Parts included in Trigger Valve Rebuild Kit
296897 (purchase separately).
311321P
41
Parts
GX-7 400 Model Handle Assembly (24K733)
15
14
32
17
3
16
25
18
23
21
39
24
40
30
3
19
8
20
29
28
31
11
4
2
26
33
7
5
37
AX
SI M
5P
12
12
10
4
35
38
34
6
13
22
3
36
9
42
1
27
311321P
Parts
GX-7 400 Model Handle Assembly (24K733)
Ref.
1
2
3†
4†
5
6
7†
8†
9
10
11
12
13
14
15
16†
17
18†
19
20†
21
22
23
24†
25
26
Part
106245
295662
106555
103337
295684
295438
295685
295405
295692
295693
C20003
295442
295695
295676
295771
295681
16K136
295683
295663
514279
295664
295665
295666
295667
295668
295669
27
28
29†
30
31
32
33
34
35
36
37
38
39†
40
295671
295673
295674
295675
295677
295678
295690
295686
295687
295688
295689
296862
295706
295708
Description
Cap screw, SCH
Pipe plug
Packing o-ring
Packing o-ring
Socket head cap screw
Stop nut, elastic, 5-40
O-ring
Needle valve, packing
Spray gun trigger
Pipe plug
Socket head cap screw
Spring
Button head cap screw
Spring
Two-position stop
O-ring
Valving rod
O-ring
Front cylinder stop
O-ring
Air piston
Pipe nipple fitting
Stop clamp screw
Pellet
Spring
Socket head cap screw,
modified
Trigger mounting screw
Gun block base
Gasket
Air cylinder
Air needle valve
Cylinder end cap
Cylinder clamp
Valve liner
Valve spool
Retainer valve nut
Spring seat
Gun handle
O-ring
Spacer
Qty.
2
1
6
3
4
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
† Parts included in Air Cylinder Rebuild Kit
296895 (purchase separately).
 Parts included in Trigger Valve Rebuild Kit
296897(purchase separately).
 Valving rod 16K136 is shipped loose.
311321P
43
Parts
Coupling Block Assembly (295383)
All models
5
1
1
2
6
4
3
44
Ref.
1
2
3
4
Part
295662
117634
117635
295693
5
6
296970
296215
Description
Qty.
Pipe plug, flush seal, 1/8 in.
2
R-swivel fitting
1
A-swivel fitting
1
Pipe plug, flush seal,
2
1/16 in.
Manual valve assembly
2
Coupling block
1
311321P
Specifications
Specifications
GX-7A Mix Module Kit
Module Kit†
Module Only
Cleanout Tool
Part No.
Size Ref.
Part No.
Size Ref.
(A) Iso Port
Part No.
Diameter
in/(mm)
(R) Resin Port
Part No.
Diameter
in/(mm)
296909
#1 Round
296907
#1 Round
246807
.0320 (.81)
246807
.032 (.81)
296916
#2 Round
296225
#2 Round
246816
.018 (.45)
246816
.018 (.45)
296919
#3 Round
296226
#3 Round
276984
.0225 (.57)
246816
.018 (.45)
296921
#4 Round
n/a
#4 Round
296290
.035 (.89)
246807
.032 (.81)
296923
#5 Round
296228
#5 Round
276984
.0225 (.57)
248892
.028 (.71)
296925
#7 Flat
296230
#7 Flat
248892
.028 (.71)
248892
.028 (.71)
296906
#10 Flat
296233
#10 Flat
296291
.036 (.91)
296291
.036 (.91)
296910
#12 Flat
296130
#12 Flat
296286
.021 (.53)
296286
.021 (.53)
296915
#16 Round
n/a
#16 Round
248892
.028 (.71)
248892
.028 (.71)
296917
#22 Round
n/a
#22 Round
276984
.0225 (.57)
276984
.0225 (.57)
296875
A2 Pour
n/a
A2 Pour
246816
.018 (.45)
246816
.018 (.45)
296876
A3 Pour
n/a
A3 Pour
248640
.039 (.99)
248640
.039 (.99)
296868
A5 Pour
n/a
A5 Pour
246807
.032 (.81)
246807
.032 (.81)
296870
A5-FS Pour
n/a
A5-FS Pour
246807
.032 (.81)
246807
.032 (.81)
Each module has a specially sized cleanout tool.
To avoid damage to module, use correct cleanout
tool.
† Module Kits include one mix module and both cleanout tools. See following table.
 Some Module Kits also available in packs. See following table.
Mix Module Kit
Part No.
Size Ref.
Qty./Pack
296908
#1 Round
12 (with 2 drills)
296869
A5 Pour
12
296871
A5-FS Pour
12
296872
A10 Pour
12
296873
A20 Pour
12
296874
A2 Pour
12 (with 2 drills)
296911
STD Blank
5
296912
STD Blank
100
296913
PEEK Blank
5
311321P
45
Specifications
Set-Up Chart for GX-7A Model
Pressure
(psi)
Output
(lbs/min)
Pattern
Dia.
(inches)
Module Part
No.
Polyol
Port
Size
No.
Orifices
Iso Port
Size
No.
Orifices
Tip
Round Spray Pattern
1000
22
22
296909 (#1)
.0320
4
.0320
4
296712
1000
12
12
296919 (#3)
.0180
4
.0225
4
296710
1600
16
14
296923 (#5)
.0280
4
.0225
4
296710
2000
30
24
296909 (#1)
.0320
4
.0320
4
296694
3000
40
24
296921 (#4)
.0320
4
.0350
4
296695
Pour Pattern
600
3.5
N/A
296875 (A2)
.0180
1
.0180
1
296697
600
12
N/A
296876 (A3)
.0390
1
.0390
1
296697
Fan Spray Pattern
1000
12
 16 x 4
296925 (#7)
.0280
2
.0280
2
296704
1500
24
 22 x 4
296906
(#10)
.0360
2
.0360
2
296703
1500
5
 16 x 3
296910
(#12)
.0210
2
.0210
2
296705
 At 24 in. above substrate
 At 18 in. above substrate
46
311321P
Specifications
GX-7 400 Mix Module Kit
Module Kits
Cleanout Drill
Iso Port
Part No.
Diameter
in/(mm)
Polyol Port
Part No.
Diameter
in/(mm)
1
12
246816
.018 (.45)
246816
.018 (.45)
451 Fan
1
12
246816
.018 (.45)
246816
.018 (.45)
296888
296887
452 Fan
1
12
246631
.020 (.51)
246631
.020 (.51)
296891
296890
453 Fan
1
12
296287
.025 (.64)
276984
.0225 (.57)
Part No.
Size Ref.
Quantity
296885
296884
402 Round
296859
296860
CAUTION
Each module kit includes cleanout drills. To
avoid damage to module, use correct cleanout drill.
Module Only
Part No.
Size Ref.
296316
451 Fan
295379
453 Fan
311321P
47
Specifications
Set-up Chart for GX-7 400 Model
Pressure
(psi)
Output
(lbs/min)
Pattern
Dia.
(inches)
Module Part
No.
Polyol
Port
Size
No.
Orifices
Iso Port
Size
No.
Orifices
Tip
1
.0180
1
296858
Round Spray Pattern
1500
3.5
8
296885 (402)
.0180
Fan Spray Pattern
1500
3.5
 16 x 3
296859 (451)
.0180
1
.0180
1
296853
1500
4.5
 16 x 3
296888 (452)
.0200
1
.0200
1
296853
1500
8.0
 16 x 3
296891 (453)
.0225
2
.0250
2
296855
 At 24 in. above substrate
 At 18 in. above substrate
Tip Kits (for GX-7 400 Gun)
48
Part No.
No. Ref.
Quantity
296858
40 Round
1
296852
210 Fan
1
296853
212 Fan
1
296854
212 Fan
5
296855
213 Fan
1
296856
213 Fan
5
296857
214 Fan
1
296892
TOM
1
311321P
Specifications
GX-7 DI Model Specifications
Module/Tip Data for Chemical Sprayed at 2500 PSI
 Module Kit
Cleanout Drill
Ref. No.
Pattern
Output
(lbs/min)
Fan Spray Pattern
296900 (#2)
246625
212
12 in. wide
12
(.086 diameter)
206
20 in. wide
22
213
12 in. wide
12
204
20 in. wide
21
248892
212
10 in. wide
8
(.028 diameter)
206
24 in. wide
11
204
18 in. wide
10
246816
212
11 in. wide
4
(.018 diameter)
213
12 in. wide
4
208
8 in. wide
4
296901 (#4)
296903 (#5)
Round Spray Pattern
296903 (#5)
246816
40
4 in. diameter
8
(.018 diameter)
55
7 in. diameter
9.5
70
8 in. diameter
9.75
90
10 in. diameter
9.75
 Actual results may vary due to chemical system characteristics, temperature, pressure, and
ratio.
 Includes appropriate cleanout drills.
Mix Module Kit
Part No.
Size Ref.
Quantity
296898
PEEK 018/018
1
296899
PEEK 028/028
1
Module Only
Part No.
Size Ref.
Qty / Pack
296902
#5
1
25M200
#5
12
311321P
49
Specifications
Tip Kits
For GX-7A and GX-7 DI Models
Round Tip Kits
Flat Tip Kits
Part No.
No. Ref.
Qty.
296698
202
1
296699
203
1
Part No.
Size
Qty.
296708
40
1
296709
46
1
296700
204
1
296717
55
5
296701
206
1
296710
70
1
296702
208
1
1
70
5
296703
209
296718
296711
80
1
296704
210
1
296719
80
5
296715
210
5
90
1
296882
212.5
SPEC
1
296712
296720
90
5
296705
212
1
296694
100
1
296716
212
5
296714
100
5
296706
213
1
296695
110
1
213SPEC
1
296883
296707
215
1
296696
110
5
296697
125
1
296877
140
1
Tool Kit
296835
GX-7A, GX-7 DI, and GX-7 400 models:
Part
Description
117642
5/16 in. Hex Nut Driver
117661
Pine Vise (dual reversible chucks)
296199
1/2 in. Combination Wrench
296188
5/8 in. Combination Wrench
295899
5/16 x 3/8 in. Open End Wrench
127748
Adjustable Wrench
296191
Gasket Removal Tool
296192
Air Valve Tool
295898
Cleanout Brush
50
Part
Description
---
3/32 in, 9/64 in, 5/32 in. and 3/16 in. Allen
Wrenches
---
#58 and #60 Mix Module Cleanout Drills
(see Mix Module Specifications)
---
5/32 in., 1/8 in., and 6/64 in. Cleanout Drills
(use varies depending on model)
311321P
Technical Data
Technical Data
Category
Air Supply
Maximum Operating Pressure
Maximum Output 
Minimum Output 
Height
Length
Width
Weight
Mixing
Data
100-125 psi (0.7-0.9 MPa, 6.9-8.6 bar)
3500 psi (24 MPa, 240 bar)
GX-7A Model:
40 lbs/min (18 kg/min)
GX-7 DI Model:
22 lbs/min (10 kg/min)
GX-7 400 Model:
8 lbs/min (3.6 kg/min)
GX-7A Model:
4 lbs/min (1.8 kg/min)
GX-7 DI Model:
4 lbs/min (1.8 kg/min)
GX-7 400 Model:
3.5 lbs/min (1.6 kg/min)
9 in. (23 cm)
9.5 in. (24 cm)
4.5 in. (11 cm)
3.5 lbs. (1.5 kg)
GX-7A Model:
Internal impingement, airless atomization,
solvent-free, mechanically self cleaning
GX-7 DI Model:
Internal direct impingement, airless atomization, solvent-free, mechanically self cleaning
GX-7 400 Model:
Internal direct impingement, airless atomization, solvent-free, mechanically self cleaning
 Theoretical: actual results will vary with operating conditions
311321P
51
Graco Standard Warranty
Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from
defects in material and workmanship on the date of sale to the original purchaser for use. With the exception of any special,
extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace
any part of the equipment determined by Graco to be defective. This warranty applies only when the equipment is installed,
operated and maintained in accordance with Graco’s written recommendations.
This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused
by faulty installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering,
or substitution of non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the
incompatibility of Graco equipment with structures, accessories, equipment or materials not supplied by Graco, or the improper
design, manufacture, installation, operation or maintenance of structures, accessories, equipment or materials not supplied by
Graco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor
for verification of the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts.
The equipment will be returned to the original purchaser transportation prepaid. If inspection of the equipment does not disclose
any defect in material or workmanship, repairs will be made at a reasonable charge, which charges may include the costs of parts,
labor, and transportation.
THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR
PURPOSE.
Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no
other remedy (including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or
property, or any other incidental or consequential loss) shall be available. Any action for breach of warranty must be brought within
two (2) years of the date of sale.
GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS
SOLD BUT NOT MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors,
switches, hose, etc.), are subject to the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable
assistance in making any claim for breach of these warranties.
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying
equipment hereunder, or the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach
of contract, breach of warranty, the negligence of Graco, or otherwise.
FOR GRACO CANADA CUSTOMERS
The Parties acknowledge that they have required that the present document, as well as all documents, notices and legal
proceedings entered into, given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les
parties reconnaissent avoir convenu que la rédaction du présente document sera en Anglais, ainsi que tous documents, avis et
procédures judiciaires exécutés, donnés ou intentés, à la suite de ou en rapport, directement ou indirectement, avec les
procédures concernées.
Graco Information
For the latest information about Graco products, visit www.graco.com.
TO PLACE AN ORDER, contact your Graco distributor or call to identify the nearest distributor.
Phone: 612-623-6921 or Toll Free: 1-800-328-0211 Fax: 612-378-3505
All written and visual data contained in this document reflects the latest product information available at the time of publication.
Graco reserves the right to make changes at any time without notice.
Original instructions. This manual contains English. MM 311321
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
GRACO INC. AND SUBSIDIARIES • P.O. BOX 1441 • MINNEAPOLIS MN 55440-1441 • USA
Copyright 2005, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.
www.graco.com
Revision P, March 2016