Graco GX-16 User manual

313536U
EN
Instructions - Parts
GX-16
For dispensing polyol and isocyanate materials only. For professional use only.
For indoor use only. Not approved for use in European explosive atmosphere
requirements.
3000 psi (21 MPa, 207 bar) Maximum Fluid Working Pressure
2500 psi (17 MPa, 172 bar) Maximum Hydraulic Working Pressure
180°F (82°C) Maximum Fluid Temperature
Important Safety Instructions
Read all warnings and instructions in this
manual. Save these instructions.
ti12896a
Model 257496 shown

2313536U
Contents
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Important Two-Component Material Information . 6
Isocyanate Conditions . . . . . . . . . . . . . . . . . . . . . 6
For all applications except spray foam . . . . . . . . 7
Material Self-ignition . . . . . . . . . . . . . . . . . . . . . . 7
Keep Components A and B Separate . . . . . . . . . 7
Moisture Sensitivity of Isocyanates . . . . . . . . . . . 7
Foam Resins with 245 fa Blowing Agents . . . . . . 8
Changing Materials . . . . . . . . . . . . . . . . . . . . . . . 8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Trigger Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Gun Connections . . . . . . . . . . . . . . . . . . . . . . . 10
Fluid Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Gun Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Shutoff Valve Setup . . . . . . . . . . . . . . . . . . . . . 12
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Theory of Operation . . . . . . . . . . . . . . . . . . . . . 14
Pressure Relief Procedure . . . . . . . . . . . . . . . . . . 15
Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Recommended Tools . . . . . . . . . . . . . . . . . . . . 16
Grease the Gun . . . . . . . . . . . . . . . . . . . . . . . . 16
Recommended Hydraulic Oil . . . . . . . . . . . . . . 16
Recommended Grease . . . . . . . . . . . . . . . . . . . 16
Clean and Service the Orifices and Filters . . . . 17
Proximity Switch Replacement Procedure . . . . 18
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Gun Models 257496, 257498, 257499,
257505, 257506, 257507, 24J187, 24E876 20
Gun Models 257492, 257493, 257494, 257495 22
Gun Models 257497, 257502, 257503, 257504,
24E877, 24E878 . . . . . . . . . . . . . . . . . . . . . 24
Gun Models 24K233, 24K234 . . . . . . . . . . . . . . 26
Dispenser Models 257513, 257514, 257515 . . 28
Gun Models 26C466, 25E973, 25E974, 25E975 30
Orifices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Gun Handle Kit 24K223 . . . . . . . . . . . . . . . . . . 33
Gun Handle Models 257509, 257510 . . . . . . . 34
Gun Handle Model 26C463 . . . . . . . . . . . . . . . 35
Pour Handle Models 257594, 257596 . . . . . . . . 37
Optional Shutoff Valve Kit . . . . . . . . . . . . . . . . . 38
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
California Proposition 65 . . . . . . . . . . . . . . . . . . . 41
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 42
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 42

Models
313536U 3
Models
Models used specifically for HFR machines.
Models used specifically for HFR-NVH machines.
† Models are CE approved.
Part No. Description
257492† GX-16 Pour Gun, 24:1, Pour Handle, Right Side Chemical Tubes,
Star-Shaped Trigger Switch Connector
257493† GX-16 Pour Gun, 24:1, Pour Handle, Left Side Chemical Tubes,
Star-Shaped Trigger Switch Connector
257494† GX-16 Pour Gun, 24:1, Pour Handle, Right Side Chemical Tubes, Cir-
cular Trigger Switch Connector
257495† GX-16 Pour Gun, 24:1, Pour Handle, Left Side Chemical Tubes, Cir-
cular Trigger Switch Connector
257496† GX-16 Pour Gun, 24:1, Isolated Pistol Handle
257497† GX-16 Pour Gun, 24:1, No Handle
257498† GX-16 Pour Gun, No Handle, No Orifice
257499† GX-16 Pour Gun, Reverse Block, No Handle, No Orifice
257502† GX-16 Pour Gun, 1:1, No Handle
257503† GX-16 Pour Gun, 1:1, No Handle, No Fittings
257504† GX-16 Pour Gun, 1:1, No Handle, 3 ft Hoses
257505† GX-16 Pour Gun, 1:1, Pistol Handle, No Orifice, Proximity Switch
257506† GX-16 Pour Gun, 1:1, Isolated Pistol Handle, Proximity Switch
257507† GX-16 Pour Gun, 1:1, Isolated Pistol Handle, No Orifice, Proximity
Switch
24E876†GX-16 Pour Gun, HFR™, NVH, Straight, Basic
24E877† GX-16 Pour Gun, HFR, NVH, Right, 24:1
24E878† GX-16 Pour Gun, HFR, NVH, Right, Basic
24J187† GX-16 Pour Gun, HFR, NVH, Straight, 24:1
24K233† GX-16 Pour Gun, HFR, NVH, Left, 24:1
24K234† GX-16 Pour Gun, HFR, NVH. Left, Basic
25E973GX-16 Pour Gun, No Handle, 1:1, PEEK Nozzle
25E974GX-16 Pour Gun, No Handle, 24:1, PEEK Nozzle
25E975GX-16 Pour Gun, LED Handle, 1:1, Magnetic Nozzle
26C466GX-16 Pour Gun, LED Handle, 24:1, Magnetic Nozzle
25R248GX-16 Pour Gun, LED Handle, 24:1, Plain Nozzle
25P155GX-16 Pour Gun, No Handle, 2:1, Plain Nozzle
25P154GX-16 Pour Gun, LED Handle, 2:1, Plain Nozzle
25R249GX-16 Pour Gun, LED Handle, 1:1, Plain Nozzle

Warnings
4313536U
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama-
tion point symbol alerts you to a general warning and the hazard symbol refers to procedure-specific risk. Refer back
to these warnings. Additional, product-specific warnings may be found throughout the body of this manual where
applicable.
WARNING
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled or
swallowed.
• Read 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.
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.
SKIN INJECTION HAZARD
High-pressure fluid from dispensing device, hose leaks, or ruptured components will pierce skin. This
may look like just a cut, but it is a serious injury that can result in amputation. Get immediate surgical
treatment.
• Engage trigger lock when not dispensing.
• Do not point dispensing device at anyone or at any part of the body.
• Do not put your hand over the fluid outlet.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Follow the Pressure Relief Procedure when you stop dispensing and before cleaning, checking,
or servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses and couplings daily. Replace worn or damaged parts immediately

Warnings
313536U 5
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 equip-
ment manuals. Read fluid and solvent manufacturer’s warnings. For complete information about your material,
request MSDS from distributor or retailer.
•Do not leave the work area while equipment is energized or under pressure. Turn off all equipment and follow
the Pressure Relief Procedure when equipment is not in use.
•Check equipment daily. Repair or replace worn or damaged parts immediately with genuine manufacturer’s
replacement parts only.
•Do not alter or modify equipment.
•Use equipment only for its intended purpose. Call your distributor for information.
•Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
•Do not kink or over bend hoses or use hoses to pull equipment.
•Keep children and animals away from work area.
•Comply with all applicable safety regulations.
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 pres-
ent.
•Ground all equipment in the work area. See Grounding instructions.
•Use only grounded hoses.
•Hold gun firmly to side of grounded pail when triggering into pail.
•If there is static sparking or you feel a shock, stop operation immediately. Do not use equipment until you
identify and correct the problem.
•Keep a working fire extinguisher in the work area.
BURN HAZARD
Equipment surfaces and fluid that’s heated can become very hot during operation. To avoid severe burns:
•Do not touch hot fluid or equipment.
PRESSURIZED ALUMINUM PARTS HAZARD
Use of fluids that are incompatible with aluminum in pressurized equipment can cause serious chemical reaction
and equipment rupture. Failure to follow this warning can result in death, serious injury, or property damage.
•Do not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or fluids con-
taining such solvents.
•Many other fluids may contain chemicals that can react with aluminum. Contact your material supplier for
compatibility.
WARNING

Important Two-Component Material Information
6313536U
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 haz-
ards 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 manu-
facturer’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 accord-
ing 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 regu-
latory authority. Follow all fluid manufacturer recommendations, including those regarding handling of con-
taminated clothing. After spraying, wash hands and face before eating or drinking.
• Hazard from exposure to isocyanates continues after spraying. Anyone without appropriate personal pro-
tective 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 recommenda-
tions 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:
____________
____________

Important Two-Component Material Information
313536U 7
For all applications except spray
foam
Material Self-ignition
Keep Components A and B
Separate
Moisture Sensitivity of
Isocyanates
Exposure to moisture (such as humidity) will cause ISO to par-
tially cure, forming small, hard, abrasive crystal that become
suspended in the fluid. Eventually a film will form on the sur-
face and the ISO will begin to gel, increasing in viscosity.
NOTE: The amount of film formation and rate of crystallization
varies depending on the blend of ISO, the humidity, and the
temperature.
Spraying or dispensing fluids that contain isocyanates cre-
ates potentially harmful mists, vapors, and atomized partic-
ulates.
•Read and understand the fluid manufacturer’s warn-
ings and Safety Data Sheet (SDS) to know specific
hazards and precautions related to isocyanates.
•Use of isocyanates involves potentially hazardous pro-
cedures. 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 manufac-
turer’s application instructions and SDS.
•Use of incorrectly maintained or mis-adjusted equip-
ment may result in improperly cured material. Equip-
ment 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 sup-
plied-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 rec-
ommended by the fluid manufacturer and local regula-
tory authority. Follow all fluid manufacturer
recommendations, including those regarding handling
of contaminated clothing. After spraying, wash hands
and face before eating or drinking.
Some materials may become self-igniting if applied too
thick. Read material manufacturer’s warnings and Safety
Data Sheet (SDS).
Cross-contamination can result in cured material in fluid
lines which could cause serious injury or damage equip-
ment. To prevent cross-contamination:
•Never interchange component A and component B
wetted parts.
•Never use solvent on one side if it has been contami-
nated from the other side.
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 mois-
ture. Always keep solvent containers closed when not in
use.
•Always lubricate threaded parts with an appropriate
lubricant when reassembling.

Grounding
8313536U
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 sys-
tem.
Changing Materials
Grounding
The equipment must be grounded. Grounding reduces
the risk of static and electric shock by providing an
escape wire for the electrical current due to static build
up or in the event of a short circuit.
Pump: use ground wire and clamp (supplied). Connect
ground clamp to a true earth ground.
Gun: ground through connection to a properly grounded
fluid hose and pump.
Fluid supply container: follow local code.
Solvent pails used when flushing: follow local code.
Use only conductive metal pails, placed on a grounded
surface. Do not place the pail on a non-conductive sur-
face, such as paper or cardboard, which interrupts
grounding continuity.
Maintain grounding continuity: When flushing or
relieving pressure, hold metal part of the gun firmly to
the side of a grounded metal pail, then trigger the gun.
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 chemi-
cal compatibility.
• When changing between epoxies and urethanes
or polyureas, disassemble and clean all fluid com-
ponents and change hoses. Epoxies often have
amines on the B (hardener) side. Polyureas often
have amines on the B (resin) side.

Trigger Lock
313536U 9
Trigger Lock
Verify that the trigger lock is engaged whenever you stop pouring to avoid accidental triggering. Check daily for
chemical build-up on trigger, trigger lock, and trigger lock spring that can prevent proper trigger lock function.
Engage
To engage the trigger lock, release the trigger. The trig-
ger lock is spring loaded and automatically engages
when the gun trigger is released.
To engage the trigger lock, press the trigger lock down.
Disengage
To disengage the trigger lock, press trigger lock down.
See the following figure.
To disengage the trigger lock, press the trigger lock up.
FIG. 1: Models 257509, 257510
Trigger Lock
ti14491a1
FIG. 2: Kit 24K223
ti10442a
FIG. 3: Models 257509, 257510
ti12896a1
ti14491a1
FIG. 4: Kit 24K223
ti10441a

Setup
10 313536U
Setup
Gun Connections
† Only hoses are taped, fittings are not taped.
FIG. 5
A
B
D
G
C
E
F
ti12897a
Ref Description Tape Color † Fitting Size HFR Systems Only
AA Pressure Line Red 7/16 ORG x
#6 JIC Female
7/16 ORG x
#5 JIC Female
BA Return Line Red and White 7/16 ORG x
#6 JIC Male
7/16 ORG x
#5 JIC Male
CB Pressure Line Blue 7/16 ORG x
#5 JIC Female
7/16 ORG x
#6 JIC Female
DB Return Line Blue and White 7/16 ORG x
#5 JIC Male
7/16 ORG x
#6 JIC Male
EHydraulic Open Line Green and White 7/16 ORG x
#4 JIC Male Extension
7/16 ORG x
#4 JIC Male Extension
FHydraulic Close Line Green 7/16 ORG x
#4 JIC Male Elbow
7/16 ORG x
#4 JIC Male Elbow
GProximity Switch or Plug
(depending on model) NA NA NA