Glas Craft Auto Probler P2 User manual

Auto Probler P2
Dispense Gun
USER MANUAL
For use with non-ammable foam and polyurea.
Not for use in explosive atmospheres.
90-110 psi (0.62-0.76 MPa, 6.2-7.6 bar) Air Inlet Pressure Range
3200 psi (22 MPa, 220 bar) Maximum Static Fluid Pressure
Important Safety Instructions
Read all warnings and instructions in
this manual. Save these instructions.
Models:
GCP4RA
GCP4R0
GCP4R1
GCP4R2
GCP4R3
GCP4R4
GCP4R5

Table Of Contents
Section 1 Installation
Warnings ............................................................................................................................................................ 3
Introduction ........................................................................................................................................................ 7
Standard Equipment .......................................................................................................................................... 8
Equipment Assembly ......................................................................................................................................... 9
Section 2 Operation
Start-up Instructions ........................................................................................................................................... 11
Section 3 General Information
Assembly Drawings ............................................................................................................................................. 13
Maintenance ........................................................................................................................................................ 15
Options ................................................................................................................................................................ 20
Section 4 Warranty and Reference Information
Limited Time Warranty ........................................................................................................................................ 23
Technical Assistance ........................................................................................................................................... 24
For Your Reference ............................................................................................................................................. 25
2

3
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclamation
point symbol alerts you to a general warning and the hazard symbol refers to procedure-specic risk. Refer back to these
warnings. Additional, product-specic warnings may be found throughout the body of this manual where applicable.
WARNING
TOXIC FLUID OR FUMES HAZARD
Toxic uids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or swal-
lowed.
Read MSDS’s to know the specic hazards of the uids you are using.•
Store hazardous uid in approved containers, and dispose of it according to applicable guidelines.• Always wear impervious gloves when spraying or cleaning equipment.•
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 uid and solvent manufacturer• Gloves• Hearing protection•
SKIN INJECTION HAZARD
High-pressure uid 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 deect leaks with your hand, body, glove, or rag.• Close material shutoff valves, and then shut off or disconnect air supply when not spraying.•
Follow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning, checking, • or servicing equipment.
BURN HAZARD
Equipment surfaces and uid that’s heated can become very hot during operation. To avoid severe burns, do
not touch hot uid or equipment. Wait until equipment/uid has cooled completely.
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help prevent re
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 ammable fumes are • present.
Ground all equipment in the work area.• Use only grounded hoses.•
Hold gun rmly 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 re extinguisher in the work area.•

WARNING
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
Do not operate the unit when fatigued or under the inuence of drugs or alcohol.•
Do not exceed the maximum working pressure or temperature rating of the lowest rated system compo-• nent. See Technical Data in all equipment manuals.
Use uids and solvents that are compatible with equipment wetted parts. See Technical Data in all •
equipment manuals. Read uid 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 manufactur-• er’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 trafc 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 uids 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.
Warnings
4

Isocyanate Hazard
Spraying materials containing isocyanates creates
potentially harmful mists, vapors, and atomized
particulates.
Read material manufacturer’s warnings and
material MSDS to know specic hazards and
precautions related to isocyanates.
Prevent inhalation of isocyanate mists, vapors, and
atomized particulates by providing sufcient ventila-
tion in the work area. If sufcient 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.
Moisture Sensitivity of
Isocyanates
Isocyanates (ISO) are catalysts used in two component
foam and polyurea coatings. ISO will react with moisture
(such as humidity) to form small, hard, abrasive crystals,
which become suspended in the uid. Eventually a lm will
form on the surface and the ISO will begin to gel, increas-
ing in viscosity. If used, this partially cured ISO will reduce
performance and the life of all wetted parts.
The amount of lm formation and rate of crystal-
lization varies depending on the blend of ISO,
the humidity, and the temperature.
To prevent exposing ISO to moisture:
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 lube pump reservoir lled with Graco • Throat Seal Liquid (TSL), Part 206995. The lubricant
creates a barrier between the ISO and the atmosphere.
Use moisture-proof hoses specically designed for • ISO, such as those supplied with your system.
Never use reclaimed solvents, which may contain•
moisture. Always keep solvent containers closed when
not in use.
Never use solvent on one side if it has been contami-• nated from the other side.
Always park pumps when you shutdown.•
Always lubricate threaded parts with Part 217374 ISO• pump oil or grease when reassembling.
5
Warnings

Material Self-ignition
Some materials may become self-igniting if applied to
thickly. Read material manufacturer’s warnings and
material MSDS.
Keep Components A and B
Separate
CAUTION
To prevent cross-contamination of the equipment’s wet-
ted parts, never interchange component A (isocyanate)
and component B (resin) partrs. The gun is shipped with
the A side on the left. The uid manifold, uid hous-
ing, side seal assembly, check valve cartridge, and mix
chamber are marked on the A side.
Foam Resins with 245 fa
Blowing Agents
New foam blowing agents will froth at temperatures above
90°F (33 °C) when not under pressure, especially if agitat-
ed. To reduce frothing, minimize preheating in a circulation
system.
Changing Materials
When changing materials, ush the equipment mul-• tiple times to ensure it is thoroughly clean.
Always clean the uid inlet strainers after ushing.•
Check with your material manufacturer for chemical • compatibility.
Most materials use ISO on the A side, but some use• ISO on the B side.
Epoxies often have amines on the B (hardener) side.• Polyureas often have amines on the B (resin) side.
6
Warnings

Section 1 - Installation: Introduction
Introduction
Before operating, maintaining or servicing any
GlasCraft system, read and understand all of the
technical and safety literature provided with GlasCraft
products. If you do not have the proper or related
manuals and safety literature for your GlasCraft system,
contact your GlasCraft distributor.
In this GlasCraft technical and safety publication, the
following advisories will be provided where appropriate:
Information about the procedure in progress.
Indicates a hazardous situation that can result in death
or serious injury.
The information in this document is intended only to
indicate the components and their normal working
relationship typical use. Each assembly should be
directed by a GlasCraft distributor or made from the
GlasCraft Assembly instructions provided.
This manual provides information for the assembly, opera-
tion, maintenance and service of this GlasCraft product as
used in a typical conguration. While it lists standard speci-
cations and procedures, some deviations may be found.
In order to provide our users with the most up-to-date
technology possible, we are constantly seeking to improve
products. If a technological change occurs after a prod-
uct is on the market, we will implement that technology in
future production and, if practical, make it available to cur-
rent users as a retrot, update or supplement. If you nd
a discrepancy between your unit and the available docu-
mentation, contact your GlasCraft distributor to resolve the
difference.
Careful study and continued use of this manual will pro-
vide a better understanding of the equipment and process,
resulting in more efcient operation, longer trouble-free
service and faster, easier troubleshooting.
7
WARNING

8
Standard Equipment
Part
Number Description
GCP4RX Auto Probler P2 Dispense Gun
313267 User Manual
Section 1 - Installation: Standard Equipment

How The Gun Works
The air on / off ports actuate the gun’s piston. When air
is applied to the “on” port the air pressure forces the
piston towards the rear of the gun, simultaneously
closing off the purge air and moving the mixing chamber
to a position where the mixing chamber orices are
aligned with the orices in both, the side block seal and
check valve assemblies.
The proper alignment of the orices is determined by
the setting of the Set Screw, which is located
at the rear of the piston assembly. This set screw
determines the length of travel of the air piston and
has been preset at the factory and should not require
adjustment. (SEE MAINTENANCE SECTION)
The two uids (isocyanate and polyol) then ow through
the material shut-off valves, seal, and check valve
assemblies and into the mixing chamber. The two
uids impinge against one another and exit the
mixing chamber in a swirling, conical spray pattern.
When air is applied to the “off” port the piston returns
to its original position and purge air ows into the mixing
chamber housing. The front tip o-ring, keeps air purge
inside the gun head forcing all of the air through the
orices in the mixing chamber, for a complete, total and
constant purge.
This purge air continues to ow through the mixing
chamber until the air switch is pulled up to shut off
all air to the gun; or until the piston is activated again.
GlasCraft Equipment
Air Hose is 1/4” in. NPS
JIC and SAE Fittings DO NOT require the use of PTFE
tape.
Once the ttings are attached and tight, refer to sys-
tem manuals for start-up instructions.
*Fitting GC2394 is an unattached part that may need to
be connected to the air hose rst, and then connected
to the gun, depending on the air hose tting.
9
Section 1 - Installation: Equipment Assembly
ISO
*AIR
POLY
AIR “ON”
AIR “OFF”

10
Section 1 - Installation: Equipment Assembly
Installing Auto Probler P2on other
Equipment
Do not place any part of the body in the path of the
material spray.
Do not point the gun at or near other personnel.
Do not look into the mixing chamber orice at any time.
Because of the hazardous materials used in this
equipment, it is recommended that the operator use an
air mask, goggles, protective clothing, and other
safety equipment as prescribed by current regulations,
recommendations of the chemical suppliers, and the
laws in the area where the equipment is being used.
If original equipment does not require the use of an un-
heated whip hose or isolation hose, the P2 can be
directly installed on to the material hose.
1. Remove the ttings from the original gun.
2. Remove swivel ttings from ball valves. Ball valves
are 1/8 in. NPT female. Remove swivel tting from
air slide valve. The air slide valve is a 1/4 in. NPSM.
3. Install the original ttings into ball valves.
It is recommended to use a non-permanent thread lock
on the 1/8 in. NPT threads to assist as a sealant and
keep the ttings from twisting with gun movement.
4. Install the gun on the original hoses.
Relieve ALL system uid and air pressures according to
manufacturer’s instructions.
WARNING
WARNING

11
Refer to specic system user manuals for complete
system installation.
Pre operation Checklist
Check that all ttings are tight and air regulators are
turned to “zero pressure”.
Do not place any part of the body in the path of the
material spray.
Do not point the gun at or near other personnel.
Do not look into the mixing chamber orice at any time.
Because of the hazardous materials used in this
equipment, it is recommended that the operator use an
air mask, goggles, protective clothing, and other safety
equipment as prescribed by current regulations, recom-
mendations of the chemical suppliers, and the laws in
the area where the equipment is being used.
Operating Requirements
• 8 - 10 CFM at 90 -110 psi (0.62-0.76 MPa,
6.2-7.6 bar)
• MAXIMUM Static Fluid Pressure - 3200 psi
(22 MPa, 220 bar)
The GlasCraft Auto Probler P2 Gun is designed and
manufactured to operate at a maximum static uid pres-
sure not to exceed 3200 psi (22 MPa, 220 bar). When
attached to a GlasCraft proportioning system, this
pressure will not be exceeded. However, if the
GlasCraft Probler P2 Gun is installed on any other
manufacturer’s self-designed equipment, great care
must be taken to ensure that the maximum static
uid pressure not be exceeded.
If the gun is being used for short periods of spraying,
GlasCraft recommends that the purge air be left ON.
If purge air is to be turned OFF, BOTH MATERIAL SHUT-
OFF VALVES MUST BE TURNED TO THEIR “OFF” POSI-
TION BEFORE TURNING “OFF” THE PURGE AIR !
Failure to follow this procedure will possibly result in the gun
head becoming encased with mixed product.
For proper purging following use, the air switch must be left
OPEN for at least 15 SECONDS after the piston has been
released.
The ow of material into the mixing chamber is controlled by
the ON or OFF position of the two material shut-off valves.
Both material shut-off valves must be FULLY OPEN
during dispensing and must be FULLY CLOSED during
service or extended shut-down periods.
BOTH MATERIAL SHUT-OFF VALVES MUST BE
TURNED TO THEIR “OFF” POSITION AND ALL FLUID
PRESSURE RELIEVED BEFORE REMOVING SIDE
BLOCK SCREWS!!
Failure to follow this procedure will possibly result in the gun
head becoming encased with mixed product.
ON OFF
Refer to system manuals for start-up and
shut-down procedures.
Section 2 - Operation: Start-Up Instructions
WARNING
WARNING
WARNING
WARNING

12
Section 2 - Operation: Start-Up Instructions
Spray Technique
Always operate safely and follow all safety procedures
outlined.
To achieve the optimum spray pattern for each applica-
tion, the appropriate mixing chambers are available in
seven round and six at spray sizes.
The standard mixing chamber supplied with your gun
will be adequate for all but the smallest and largest
applications.
Foam rise and cure times will vary according to the
material and substrate temperature. Higher material or
substrate temperature will increase rise and cure times;
lower material or substrate temperatures will decrease
rise and cure times. Consult your chemical manufac-
turer’s data specication sheets for their recommended
spray temperatures. Under most circumstances, both
components will be used at identical temperatures.
Higher pressures and temperatures may be used to
increase material break-up, improve mixing and speed
rise times. With hose lengths over 50 ft.(15.25 m), or
when material viscosities are high, higher material
pump pressures may be necessary.
The gun air switch assembly MUST BE OPENED
(down position) prior to spraying to provide air for piston
operation and purge air when the piston is released.
When spraying, the gun piston may be activated con-
tinuously, or deactivated at the end of each stroke. A
smooth, even layer is best achieved by moving the
gun back and forth in a slow, even motion, overlapping
the previous pass about 50 to 75 percent. DO NOT
SPRAY OVER RISING FOAM! The ideal gun-to-surface
distance is about 18 to 24 inches. Be sure to point the
gun directly at the surface to be sprayed. Spraying at
an angle to the surface will cause the foam to be rough
and will generate overspray.

13
Section 3 - General Information: Auto P2 Dispense Gun
6
22
33
8
8
37
10 3912
38
23
40
11
29
44
9
46 41
34 32
43
43
20
724
18 2827
25 17 14
4
2
48
45
47
13
7
24
36
35
42
16
326
5
47
24
7
26
16
3
4
45
48
1
21
18
28
27
25
17
15
Part A B Kit
GCP4RA GC250A GC251A GC1948
GCP4R0 GC2500 GC2510 GC1947
GCP4R1 GC2501 GC2511 GC1947
GCP4R2 GC5202 GC2512 GC1947
GCP4R3 GC2503 GC2513 GC1947
GCP4R4 GC2504 GC2514 GC1947
GCP4R5 GC2505 GC2515 GC1947

14
Ref. Part Description Qty.
1 117634 SWIVEL, UNION 1
2 117635 SWIVEL, UNION 1
3 GC0043 O-RING 2
4 GC0044 O-RING 2
5 GC0128 SWITCH, ASSY, AIR
(includes 5a - 5d) 1
5a 106555 O-RING 1
5b 110242 O-RING 2
5c GC0126 TUBE, SWITCH, AIR 1
5d GC0127 SPOOL, SWITCH, AIR 1
6 GC0143 SCREW, SET 1
7 GC0259 BALL, 1/4 DIA, SST 3
8 GC0498 FITTING, CONNECTOR 2
9 GC1198 FITTING, LUBE 1
10 GC1898 PISTON, AIR 1
11 GC1899 PISTON, AIR 1
12 GC1900 SPACER, CYLINDER 1
13 GC1901 INSERT, VALVE, AIR 1
14 GC1902 BLOCK, SIDE, ISO 1
15 GC1903 BLOCK, SIDE, POLY 1
16 GC1904 FILTER, VALVE, CHECK 2
17 GC2494 SEAL 2
18 GC2495 HOUSING, SEAL 2
20 GC1914 AIR CAP 1
21 GC1916 PROBLER P2 HEAD 1
22 GC1919 CAP, REAR 1
23 GC1921 RING, RETAINING, INTERNAL 1
24 GC1922 SPRING 3
25 GC1923 SPRING 2
Section 3 - General Information: Auto P2 Parts List
Ref. Part Description Qty.
26* GC2496 SCREEN, FILTER, 40 MESH 2
27 GC2498 SEAL, SIDE 2
28 111450 O-RING 2
29 117517 O-RING 1
32 GC2520 BLOCK, AUTOMATIC 1
33 C20988 O-RING 1
34 GC2056 O-RING, FLUOROELASTOMER 1
35 110242 O-RING 1
36 GC2057 O-RING, FLUOROELASTOMER 1
37 108833 O-RING 1
38 107563 O-RING 1
39 GC2059 O-RING, FLUOROELASTOMER 1
40 C20207 O-RING 1
41 GC2060 O-RING, FLUOROELASTOMER 1
42 GC2079 SCREW, SET 1
43 GC2081 SCREW, SET, SST 4
44 GC2187 SCREW, SHDC 2
45 GC2196 PIPE, NIPPLE, HEX 2
46 GC2243 SCREW, SET 1
47 GC2248 SCREW, SHDC 4
48 GC2337 VALVE, BALL, SST 2
* 100 mesh lter, GC2497 is also available.

15
Before attempting to perform any maintenance on
this gun, relieve All Fluid and Air Pressures!
• To relieve uid and air pressures:
• Turn OFF all air supplies at system except gun
piston air.
• Activate the gun until all uid pressures have been
relieved.
• Turn OFF the gun piston air at the system.
• Activate the gun until all piston air pressure has been
relieved.
Perform Gun maintenance as follows:
1. Check for leaking seals (Ref. 27).
• Turn OFF the gun incoming air by closing gun air
switch.
Air Switch
• Wait approximately 10 - 20 seconds, then turn ON
the incoming air by opening Gun Air Switch.
• Repeat two or three times.
• If any material has been purged from the gun, the
seals (Ref. 27) are leaking, or o-ring (Ref. 28).
• Correct leaks by replacing the seals or o-rings and
re-checking.
2. Check the material valves, p/n GC2337 for any leaks:
• Turn OFF both material valves.
• Activate and deactivate the gun several times.
• Wait approximately 10-20 seconds.
• Activate and deactivate the gun several times.
• If additional material is purged, the material valves
are leaking.
• Correct the leaks by taking off black knobs and turning
packing 1/8 in. to 1/4 in. turns at a time until the leak
has stopped. Re-check.
3. Check side blocks
• Turn OFF the air switch on the gun.
Before removing the side blocks make certain that both
material valves are in the OFF positions! Also activate and
deactivate several times to relieve uid pressure in the gun.
If the material valves are on when the side blocks are
removed the gun will quickly become encased in urethane!
Point gun side blocks down, away from all personnel.
Existing uid pressures could cause material to exit the
side blocks with considerable force.
Section 3 - General Information: Maintenance
WARNING
WARNING
WARNING

16
• Take the side blocks off by removing screws.
• Examine the sides of the mixing chamber
for scratches and/or material build-up. Carefully,
without scratching the seal surfaces (sides), remove
any accumulated material. Solvent can be used to
wash accumulated material off of chamber, side blocks,
etc. Keep the gun chamber tilted toward the ground so
that solvent does not run back into gun. Certain
solvents will attack o-rings on chamber shaft
causing swelling and deterioration of o-rings.
• Place generous amounts of high quality, white lithium
grease in each side of the gun front housing and on
the side block seals.
• Use correct size drill bit to clean out the mixing cham-
ber exit passage. Use correct size drill bit to clean the
inlet side holes of the mixing chamber taking care not
to scratch the mixing chamber’s polished surfaces.
(Refer to the drill chart in this manual.)
• Re-assemble the side blocks and tighten the screws.
Grease should appear at the tip of the mixing chamber.
DO NOT open the air switch on the gun because this
will purge grease from the gun. The grease should be
allowed to remain in the gun overnight.
Section 3 - General Information: Maintenance

17
Daily Shut-Down
For experienced users
Once you have used the gun with a product and system,
and you have become comfortable with techniques on
how all the variables are affecting your operations and
maintenance requirements, Daily, Weekly, and
Monthly Maintenance requirements can be addressed
specic to your operation.
1. Turn the ball valves off activate and
deactivate the gun 5 - 6 times to purge residual
pressure.
2. Drill out the chamber insert snout with correct size
drill bit for insert. (Refer to the drill chart in this
manual.)
3. Pull slide valve halfway back to limit the air purge.
Air Switch
4. Inject white lithium grease into zerk tting until a
light mist of grease is purged through the snout.
Shut off the air purge.
5. Remove the air cap and set to side. If solvent soaking is
required, remove the o-ring before soaking.
6. Remove the snout insert and soak in solvent until next
usage.
Daily Start-Up
1. Clean the snout insert, p/n GC19XX. Be sure both,
the face and bottom at are clean. Drill the snout bore
out with the correct size bit for snout. (Refer to the drill
chart in this manual.)
2. Clean the inner bore of the chamber. Drill out the cham-
ber snout inlet bore as required.
3. Install the snout insert.
4. Install the air cap on to the chamber. Tighten nger tight
until the cap bottoms out. Snug down with a ½ in.
wrench. This does not require high torque. Over
tightening can result in chamber damage.
Section 3 - General Information: Maintenance
Zerk Fitting

18
Refer to specic system user manuals for complete
system installation.
Parts Replacement Procedure
Before attempting to perform any maintenance on this
gun OR before removing the side blocks, make certain
that both gun material valves are in the OFF positions!
Also activate and deactivate several times to relieve
uid pressure in the gun.
If the material valves are on when side blocks are
removed, the gun will quickly become encased in
urethane!
1. Read each procedure entirely before beginning and
refer to the illustrations as needed.
2. Flush and clean all chambers and passages as they
become accessible.
3. Clean all parts before assembly.
4. Replace all o-rings and seals with new parts from
the appropriate kit.
5. Inspect all parts for wear or damage and replace as
required with new genuine GlasCraft replacement
parts from your authorized GlasCraft distributor.
6. Inspect all threads for wear or damage and replace
as required.
7. Tighten all threaded parts securely, but not excess-
ively, upon assembly.
8. Lightly lubricate all o-rings and threads with
lithium grease.
9. Check all springs for resilience. They should return
quickly to their original (new) length.
Routine Care
Before attempting to perform any maintenance on this gun
OR before removing side blocks, make certain that both Gun
material valves are in the fully OFF positions! Also activate
and deactivate several times to relieve uid pressure in the
gun.
If the material valves are on when side blocks are removed,
the gun will quickly become encased in urethane!
It is recommended that the following service be performed
on a daily basis.
1. Clean the gun using a brush and an appropriate clean
solvent.
2. Inspect the side block seals making cer tain they are
clean and free of scratches, nicks or foreign material.
Clean and replace as required.
3. Remove, clean or replace the lter screen.
4. Maintain a reasonable stock level of “wear” items such
as seals and o-rings. (see Service & Repair Parts Kits
listed in Parts & Illustrations section.)
Piston Throw Adjustment
The P2 gun piston throw is factory set and as a rule, should
not require adjustment. The piston throw refers to how far
back the air piston will travel when the gun is activated.
Proper throw adjustment will align the mixing chamber side
ports with the side block seal thru port. There is a set screw
that determines how far the piston will travel before it stops.
To determine if the throw is correct:
1. Turn the material ball valves to the OFF position.
Section 3 - General Information: Maintenance
WARNING
WARNING

19
2. Activate the gun to clear out residual pressure in
side blocks.
3. Remove the side blocks.
4. Remove one of the side block seal housings,
from side block. Leave the seal (ref. 27)
in housing and rinse with suitable solvent.
5. Turn the air ON to gun, apply air to the “on” port to
activate the gun into spray position, when gun pulls
back, keep in mind the purge air will not shut off.
Turn air OFF at the slide valve before
deactivating the piston.
6. Place seal / seal housing assembly into gun head so
the face of seal sets against the chamber. Look
through the thru port of the Seal. The side port of
the chamber should be at the center, or slightly
forward of the center line. If this adjustment appears to
be correct, rotate the seal housing to ensure the air
cap is not contacting the seal housing. There should be
no contact between these two parts. Contact will result
in chamber damage.
7. Adjust the set screw (ref. 6) until
a. The side port of the chamber is “on center” with or
forward of center of the thru port of seal.
b. The seal housing can be rotated and does not make
contact with the air cap.
8. Turn the air ON and re-activate the gun, then shut the
air OFF before releasing piston. Re-check the throw.
9. If the set screw feels loose, Remove it from the rear
cap, clean and apply non-permanent thread lock to
threads and re-install, set adjustment.
Section 3 - General Information: Maintenance

Service & Repair Kits
20
GC1949 Hardware Kit 04-05
Part Description Qty.
GC0086 3/16” Ball Driver 1
GC0087 5/32” Ball Driver 1
GC0175 Pin Vise 1
GC2496 Screen Filter 2
GC0075 Drill Bit 1
GC0076 Drill Bit 1
117517 O-Ring 1
111450 O-Ring 2
GC2212 37 Deg. Connector Fitting 1
GC2334 45 Deg. Connector Fitting 1
GC2394 Adapter Fitting 1
GC1950 Premium Repair Kit
Part Description Qty.
GC1931 O-Ring 1
111516 O-Ring 1
111450 O-Ring 4
113137 O-Ring 2
111316 O-Ring 2
118594 O-Ring 1
117724 O-Ring 2
117517 O-Ring 1
GC1932 O-Ring 3
GC1933 O-Ring 1
GC1934 O-Ring 1
GC1935 O-Ring 1
GC1936 O-Ring 1
117610 O-Ring 1
GC1937 Standard Repair Kit
Part Description Qty.
C20988 O-Ring 1
GC2056 O-Ring 1
110242 O-Ring 2
106555 O-Ring 2
GC2057 O-Ring 1
GC2058 O-Ring 3
108833 O-Ring 1
107563 O-Ring 1
GC2059 O-Ring 1
C20207 O-Ring 1
GC2060 O-Ring 1
GC0043 O-Ring 2
GC044 O-Ring 2
111450 O-Ring 2
117517 O-Ring 1
GC1946 Side Seal Kit
Part Description Qty.
GC2498 SST Side Seal 2
111450 O-Ring 2
GC1947 Hardware Kit 00-03
Part Description Qty.
GC0086 3/16” Ball Driver 1
GC0087 5/32” Ball Driver 1
GC0175 Pin Vise 1
GC2496 Screen Filter 2
GC0068 Drill Bit 1
GC0069 Drill Bit 1
GC0070 Drill Bit 1
GC0072 Drill Bit 1
GC0073 Drill Bit 1
GC0074 Drill Bit 2
GC0077 Drill Bit 1
GC0083 Drill Bit 1
GC2212 37 Deg. Connector Fitting 1
GC2334 45 Deg. Connector Fitting 1
117517 O-Ring 1
111450 O-Ring 2
GC2394 Adapter Fitting 1
GC194 Hardware Kit -AA
Part Description Qty.
GC0082 Drill Bit 1
GC0081 Drill Bit 1
GC0086 3/16” Ball Driver 1
GC0087 5/32” Ball Driver 1
GC0175 Vise Pin 1
GC1924 Filter Screen 2
111450 O-Ring 2
117517 O-Ring 1
Section 3 - General Information: Options