Graco 295530 Quick start guide

311320J
Operation, Parts, Service and Repair
Model D Spray Gun
For use with non-flammable polyurethane foams. For professional use only.
Not for use in explosive atmospheres.
See page 2 for model information.
1000 psi (7 MPa, 70 bar) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions
in this manual. Save these instructions.
EN

Models
2311320J
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
Major Components . . . . . . . . . . . . . . . . . . . . . . . 8
Centerline Components . . . . . . . . . . . . . . . . . . . 9
Operation Basics . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Isocyanate Hazard . . . . . . . . . . . . . . . . . . . . . . 10
Keep A and B Components Separate . . . . . . . . 10
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Coupling Block . . . . . . . . . . . . . . . . . . . . . . . . . 10
Air Hose Connection . . . . . . . . . . . . . . . . . . . . . 12
Valving Rod Adjustment Screw . . . . . . . . . . . . . 12
Air Cap Adjustment Valve . . . . . . . . . . . . . . . . . 13
Felt Wiper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Initial Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Daily Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Daily Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Pressure Relief Procedure . . . . . . . . . . . . . . . . . . 16
Spray Pattern Adjustment . . . . . . . . . . . . . . . . . . . 17
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Gun Service Kits . . . . . . . . . . . . . . . . . . . . . . . . 20
Clean Spray Gun Procedure . . . . . . . . . . . . . . . 21
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Filter Screen Removal and Service . . . . . . . . . . 22
Clean Injection Slots . . . . . . . . . . . . . . . . . . . . . 23
Valving Rod Adjustment . . . . . . . . . . . . . . . . . . 24
Centerline Component Removal . . . . . . . . . . . . 25
Centerline Component Installation . . . . . . . . . . 27
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Model D Spray Gun Assembly . . . . . . . . . . . . . 30
Air Cylinder Assembly . . . . . . . . . . . . . . . . . . . . 34
Coupling Block Assembly . . . . . . . . . . . . . . . . . 35
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 38
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 38
Models
Part No. Description Mix Module
295530 D-55 296597
295531 D-55-RECIRC 296597
295532 D-62 296598
295533 D-70 296599

Warnings
311320J 3
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, ser-
vicing 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 surgi-
cal treatment.
• Do not point gun at anyone or at any part of the body.
• Do not put your hand over the spray tip.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Do not spray without tip guard and trigger guard installed.
•FollowPressure Relief Procedure in this manual, when you stop spraying and before
cleaning, checking, or servicing equipment.

Warnings
4311320J
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 com-
plete 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 infor-
mation.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot sur-
faces.
• 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.
•FollowPressure Relief Procedure in this manual, when you stop spraying and before
cleaning, checking, or servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.
WARNING

Important Two-Component Material Information
311320J 5
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.
• Useofisocyanates involvespotentially hazardousprocedures.Donotspraywiththisequipmentunlessyou
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 ofthefluidmanufacturerandlocal regulatoryauthority.Postingaplacard such asthefollowingoutside
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
6311320J
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
Partiallycured ISO willreduce 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.

Important Two-Component Material Information
311320J 7
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
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.

Overall View
8311320J
Overall View
Major Components
FIG. 1: Major Components
Spring Retainer Case
Valving Rod Closure Spring
Valving Rod Positioner Valving Rod
Adjustment Screw
Valving Rod Stop Bar
Valving Rod
Piston Rod
Trigger
Air Cap Adjustment Valve
Gun Block
Coupling Block
Coupling Block
Mounting Screw

Overall View
311320J 9
Centerline Components
FIG. 2: Centerline Components
Coupling Block Gaskets
Air Cap
Mixing Chamber Case
Snap Ring
Screen
Seal
A-Iso Check Valve
Screen Screw
Gun Block
Mounting Screw
O-Ring
Closure
Screw
Valving Rod
Assembly
Felt Wiper Retainer
Gun Block
R-Resin Check Valve
Screen Mounting Screw

Operation Basics
10 311320J
Operation Basics
Isocyanate Hazard
Keep A and B Components
Separate
Grounding
Check your local electrical code and propor-
tioner manual for detailed grounding instruc-
tions.
Ground the spray guy through connection to a
Graco-approved grounded fluid supply hose.
Coupling Block
Install Coupling Block
1. Inspect coupling block gaskets for damage
and wear. Replace if necessary.
2. With gaskets in place, fit coupling block to
gun block.
3. Insert coupling block mounting screw and
tighten securely with 5/16 in. nut driver.
FIG. 3: Coupling Block
To prevent accidental gun operation, always
disconnect air supply before servicing gun or
anytime gun is not in use.
Spraying materials containing isocyanates
createspotentiallyharmful mists,vapors,and
atomized particulates.
Read material manufacturer’s warnings and
material MSDS to know specific hazards and
precautions related to isocyanates.
Prevent inhalation of isocyanate mists,
vapors, and atomized particulates by provid-
ing sufficient ventilation in the work area. If
sufficient ventilation is not available, a sup-
plied-air respirator is required for everyone in
the work area.
To prevent contact with isocyanates, appro-
priate personal protective equipment, includ-
ing chemically impermeable gloves, boots,
aprons, and goggles, is also required for
everyone in the work area.
CAUTION
To prevent cross-contamination of the gun’s
wetted parts, do not interchange A compo-
nent (isocyanate) and B component (resin)
parts. The gun is shipped with the A side on
the left.
Coupling Block
Gaskets
Coupling Block
Mounting Screw

Operation Basics
311320J 11
Manual Valves
1. Open manual valves using 5/16 in. nut
driver; turn manual valves counterclock-
wise approximately three full turns. Do not
open until it bottoms out.
2. Close manual valves by turning fully clock-
wise.
FIG. 4: Manual Valves
Remove Coupling Block
1. Disconnect air hose.
2. Close both manual valves.
3. Remove coupling block mounting screw
(F
IG . 3).
4. Separate coupling block from gun. Do not
lose gaskets.
5. Use gun cleaner to wipe clean mating sur-
face of gun block and coupling block.
Cover exposed opening with grease.
Triggering gun with manual valves closed
may cause crossover if gun ports contain
residual chemical.
Never open manual valves unless coupling
block is secured to gun or exit port is directed
into flush pail.
Manual Valves
To prevent release of pressurized chemical,
close both manual valves before removing
coupling block.

Operation Basics
12 311320J
Air Hose Connection
To CONNECT air hoses, pull back sleeve of
female fitting, insert male fitting and slide
sleeve forward to secure connection.
To DISCONNECT air hoses, pull back sleeve
of female fitting and remove male fitting.
FIG. 5: Air Hose Connection
Valving Rod Adjustment
Screw
Use to regulate amount of valving rod travel
when gun trigger is depressed with air supply
connected. Turn clockwise to decrease travel,
and counterclockwise to increase travel.
1. Use 5/64 in. hex key wrench to loosen fric-
tion lock.
2. Turn adjustment screw as required and
tighten friction lock until screw no longer
easily turns by hand.
3. Check friction lock periodically and tighten
as required to prevent screw from slipping
during operation.
FIG. 6: Valving Rod Adjustment Screw
Pull Sleeve
Friction Lock

Operation Basics
311320J 13
Air Cap Adjustment Valve
Use to control amount of air that passes
through air cap and over mixing chamber tip.
Airflow helps keep tip free of sprayed chemi-
cal. Too much air may distort spray pattern
and create overspread. Too little air will not
properly clean end of valving rod.
To OPEN valve, turn knob approximately 1/8
turn counterclockwise.
To CLOSE valve, turn knob fully clockwise.
FIG. 7: Air Valve Adjustment
Felt Wiper
Adjust Felt Wiper
1. Use 5/16 in. open-end wrench to loosen
retainer slightly.
2. Slowly tighten it by hand until it seats
against rear packings in mixing chamber.
3. Use 5/16 in. open-end wrench to tighten
retainer another half turn.
FIG. 8: Felt Wiper
Clean Felt Wiper
1. Insert nozzle of flush can into holes of felt
wiper.
2. Saturate felt with gun cleaner.
Open
Close

Initial Set Up
14 311320J
Initial Set Up
1. Remove coupling block from gun.
2. Check valving rod clearance in closed posi-
tion. Rod should extend approximately 1/32
in. (1 mm) beyond tip of mixing chamber. If
it does not, see Valving Rod Adjustment
procedure, page 24.
FIG. 9: Valving Rod (Closed Position)
3. Adjust valving rod travel to initial setting.
a. Loosen friction lock. Turn valving rod
adjustment screw clockwise until it
stops.
b. Turn valving rod adjustment screw 11
turns counterclockwise.
4. Connect air supply hose to gun.
5. Connect A-isocyanate hose (red-taped) to
notched fitting on coupling block. Then con-
nect R-resin hose (blue-taped) to fitting
without notches on coupling block.
6. Close both manual valves.
7. Pressurize the A and R chemical hoses
and check for leaks. (See Proportioning
Unit manual.)
8. Bleed air from chemical hoses:
a. Hold coupling block with exit ports
pointed into disposable container.
b. Open each manual valve to allow
trapped air to escape. Bleed each side
until chemical is free of air.
c. Close both manual valves.
9. Use clean cloth soaked in gun cleaner to
wipe clean coupling block and its mating
surfaces.
10.Install coupling block to gun block.
11.Proceed with Daily Start-up procedure or
Shutdown procedure as required.
1/32 in.
CAUTION
To avoid accumulation of dirt and other con-
taminants, do not apply grease to mating
surfaces of coupling block.

Daily Start-Up
311320J 15
Daily Start-Up
1. Connect air supply to gun, page 12.
2. Adjust air cap valve, page 13.
3. Saturate felt in felt wiper with gun cleaner
using flush can.
4. Trigger gun multiple times to ensure valv-
ing rod moves the full travel quickly and
freely.
5. Open both manual valves, page 11.
6. Test spray on disposable surface and
adjust spray pattern as needed. (See Spray
Pattern Adjustment procedure, page 17.)
Daily Shutdown
1. Follow Pressure Relief Procedure, page
16.
2. Shut down proportioning unit as required.
Ensure gun is attached to coupling block and
air hose, and the proportioning unit is at
desired temperature and pressure.
CAUTION
Sluggish valving rod action may result in valving rod
sticking in open position when fluid pressure is
applied. Always have a 5/16 in. nut driver available to
quickly close manual valves on coupling block.
Do not exceed 1000 psi (7 MPa, 70 bar)
maximum fluid working pressure even in
static de-triggered conditions, or check
valve damage may result.
Follow when gun is out of service for any
length of time. Daily disassembly of gun for
cleaning is not recommended if it has been
operatingproperly.However,ifyou remove
the gun from the coupling block, flush and
clean thoroughly.

Pressure Relief Procedure
16 311320J
Pressure Relief Procedure
1. Close both manual valves.
2. Trigger gun once onto waste area to relieve
fluid pressure in front end of gun.
3. Disconnect gun air supply, page 12.
4. If gun is removed from coupling block, fol-
low Clean Spray Gun Procedure, page 21.
Relieve pressure before cleaning or repairing
gun.
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.
Manual Valves

Spray Pattern Adjustment
311320J 17
Spray Pattern Adjustment
1. Check valving rod clearance in closed posi-
tion. Rod should extend approximately 1/32
in. (1 mm) beyond tip of mixing chamber. If
it does not, see Valving Rod Adjustment
procedure, page 24.
FIG. 10: Valving Rod (Closed Position)
2. Adjust valving rod travel to initial setting.
a. Loosen friction lock. Turn valving rod
adjustment screw clockwise until it
stops.
b. Turn valving rod adjustment screw 11
times counterclockwise.
3. Locate point of valving:
a. Aim gun at disposable target.
b. Dispense short (1 second) bursts
toward target while simultaneously with-
drawing valving rod adjustment screw
from retainer case by 1/4-turn incre-
ments in counterclockwise direction.
c. Point of valving is reached when chemi-
cal stream mists as shown in F IG . 11.
FIG. 11: Point of Valving
4. Adjust spray pattern.Note position of notch
in hexhead of adjustment screw, then back
screw out counterclockwise the number of
turns specified in Table 1. Notice spray pat-
tern opens as adjustment is made (F IG .
This adjustment may create a large mass
“bun” of urethane foam. Very high tempera-
tures created by chemical reaction inside a
bun may not dissipate after outside surface
has cooled. A large bun may continue to react
for several hours after spraying until flash
(burning) point of foam is reached. ALWAYS
break buns into smaller pieces so heat can
escape.
1/32 in.

Spray Pattern Adjustment
18 311320J
12).
FIG. 12: Opening Spray Pattern
5. Fine tune spray pattern:
a. After you back out adjustment screw,
make fine adjustments (1/8turns or less
in either direction as required) to obtain
pattern shown in F IG . 13. Moving the
screw out beyond this point may cause
the pattern to split, as shown in F IG . 14.
FIG. 13: Desired Pattern
FIG. 14: Split Pattern
b. If full-round pattern cannot be achieved,
ensure that material temperature and
spray pressure are correct. If pattern
remains closed upon reaching maxi-
mum specified number of turns out from
point of valving, material temperature is
too low
c. If pattern splits or has hollow center,
even with the adjustment screw at mini-
mum number of turns from point of valv-
ing, material temperature is too high.
Refer to F IG . 12.
d. After reaching satisfactory spray pat-
tern, note temperatures at proportioner
and hose, and position of notch on the
adjustment screw. As spraying pro-
ceeds, pattern may occasionally streak
or change. If this happens, inspect
chamber tip and remove any build-up of
solid foam with wooden stick or brass
wire brush.

Spray Pattern Adjustment
311320J 19
e. If buildup recurs shortly after cleaning
tip, remove air cap and ensure inside is
clean.
Reinstall air cap and ensure airflow is properly
set.
If no buildup occurred on air cap, check the fol-
lowing items in this order and readjust if neces-
sary:
• Check Valving Rod Adjustment
Screw/Sleeve setting.
• Check hose temperature setting.
• Check primary heater temperature setting.
• Ensure spray pressures between chemi-
cals are balanced. If they are not, refer to
Troubleshooting section of Proportioning
Unit Operation Manual for the proportioner
in use.
• Ensure flow of air to air cap is adequate but
not excessive.
Table 1: Valving Rod Adjustment for Standard Mixing Chambers
Chamber
Turns Out From Point of
Valving Recommended
Distance of Gun
from Surface Pattern SizeMinimum Maximum
46-800 1/2 turn 2 turns 12 in. (304-8 mm) 6 in. (152.4 mm)
46-810 1/2 turn 2 turns 12 in. (304-8 mm) 6 in. (152.4 mm)
55-776 1 3/4 turns 2 5/8 turns 18 to 20 in. (457.2
to 508 mm) 8 in. (203.2 to 228.6 mm)
62 2 turns 3 turns 18 to 20 in. (457.2
to 508 mm) 8 to 9 in. (203.2 to 228.6 mm)
70 2 turns 3 turns 18 to 20 in. (457.2
to 508 mm) 10 to 12 in. (254 to 304.8 mm)
78-851 2 turns 3 turns 24 in. (609.6 mm) 14 in. (355.6 mm)

Maintenance
20 311320J
Maintenance
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. 15: 1-Quart Gun Service Kit
For more information about the 1-Quart Gun
Service Kit, see manual 311340.
FIG. 16: 3-Gallon Gun Service Kit
For more information about the 3-Gallon Gun
Service Kit, see manual 311341.