Eastwood 19867 User manual

PROFESSIONAL
UNDERCOATING GUN
INSTRUCTIONS
Item #19867

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The EASTWOOD PROFESSIONAL UNDERCOATING GUN is precision engineered and designed
for use by the seasoned professional or hobbyist. With the wide range of material flow adjust-
ment and dual-capability set-up, it can apply many thicker bodied materials such as undercoat-
ing, bedliner and chip protecting film as well as thinner and rustproofing materials. The body is
constructed of a highly durable and lightweight aluminum with Stainless Steel internal compo-
nents which are compatible with both solvent and water-based products. Convenient reference
markings on the gun body and control knobs allow for accurate repeatability of gun settings.
Industrial design will provide many years of trouble-free service.
CONTENTS
(1) Professional Undercoating Gun
(1) One Quart Solvent Resistant Composite, Composite Material Cup
(3) Flexible Transparent Wands - 5’ x 1/4”:
- (1) Misting Head Wand
- (1) 360° Spray Head Wand
- (1) 90° Spray Head Wand
SPECIFICATIONS
Stainless Steel Internal Components
Working Pressure: 40-80 psi (max 140 psi); [3-4 bar. (max 10 bar)]
Approximate Air Consumption: 7 to 10 CFM [200-300 L per min]
Air Input Threads: 1/4” NPT
Nozzle/Accessory Wand Thread: M11 x 0.75
Noise Level: <80 dba.
Multi-Configurable for Thick Heavy-Bodied or Thin Light Bodied Materials

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READ INSTRUCTIONS!
• Thoroughly read and understand these product instructions before using this
equipment. Failure to follow all warnings can result in tool damage or serious
physical injury.
• Keep these product instructions for future reference.
FIRE AND EXPLOSION HAZARD!
• Do Not use near sparks, open flame or other potential ignition source.
Solvents and Materials are highly combustible and may ignite or explode.
Keep at least 25’ away from any non-explosion proof compressors, motors,
switches etc.
HEALTH HAZARD!
• Avoid breathing vapors produced by Spray Gun. Always wear appropriate
NIOSH approved breathing apparatus and use in a well-ventilated area.
• Wear appropriate ANSI standard Z87.1 eye protection.
• Wear solvent-resistant gloves.
• Do not allow unprotected persons or pets in the spray area.
BURSTING HAZARD!
• Do not exceed 150 psi (10 bar) of tool inlet pressure. Permanent tool damage
and/or bursting could occur and cause personal injury.
DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
NOTICE is used to address practices not related to personal injury.
SAFETY INFORMATION
The following explanations are displayed in this manual, on the labeling, and on all other information
provided with this product:

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INJURY HAZARD!
• This Undercoat Gun can quickly spray when handling while connected to an
air supply causing serious personal injury. Always disconnect the Gun from
the air supply before adding material, changing nozzles, removing clogs or
other maintenance.
• Use only Eastwood PRE, acetone or mineral spirits to clean Gun and Nozzles.
Use of lacquer thinners or chlorinated or halogenated hydrocarbon solvents
can corrode aluminum gun components, damage seals or emit hazardous
reactive gasses.
• Use for spraying undercoating, bedliner and rustproofing products only.
Do not use for spraying pesticides, fertilizer, acids or other corrosive
materials and solvents.
• Follow Federal and Local Hazmat regulations and collect used solvent for
proper disposal.
SAFETY INFORMATION
INITIAL SET-UP
• Remove all components from carton, identify them and become familiar with their purpose.
• A 3/8” I.D. minimum air hose at a 25’ maximum length is strongly recommended for best
results. Smaller I.D. hose and greater length may reduce available CFM and produce
unsatisfactory results.
• A clean, dry, regulated air supply is required. The use of an additional “on the gun” regulator
is strongly recommended to accurately control gun inlet air pressure while applying material.
• Clean out the fluid cup as well as the gun air and material passages with a solvent such as
Eastwood PRE or acetone to remove any residual manufacturing impurities before use.
Dry thoroughly.

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GUN FEATURE IDENTIFICATION (FIG 1 & FIG 2)
ANozzle
Used to spray thicker materials.
Removed and replaced with one
of three accessory Spray Wands
for thinner, waxy materials
BMaterial Flow Control Knob
CAtomization Control Knob
DAir Flow Regulator
EAir Inlet Connection, 1/4” NPT
FTrigger
GGun Hanging Hook
HMaterial Cup
JCup Pressure Line
KSpray Head Ring
LSpray Head
A
FIG. 1FIG. 1
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FIG. 2FIG. 2
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B
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E
D
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J
F
H

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GUN SET-UP AND OPERATION
The Eastwood Professional Undercoating Gun is designed to be Dual-Purpose with the ability to spray
heavy bodied materials, or configured for lighter, thinner materials.
The Gun is supplied pre set-up to spray heavy materials and coatings such as undercoating, bedliner,
sound proofing and heat resistant materials.
For this type of heavier, thicker material, the best performance can be expected by spraying directly
through the Nozzle and without the Wand attachments.
When applying thinner, rustproofing, or wax-based materials, the 5’ x 1/4” accessory Wands work
very well for reaching into deep and hard to access areas.
Refer to the specific Set-Up for each type of
material is described below:
• Remove all components from carton,
identify them and become familiar with
their purpose.
GUN SET-UP FOR THICKER BODIED MATERIALS
(FIG 3):
ANozzle – Leave in place when applying
thicker materials.
BMaterial Flow Control Knob –
Rotating the Knob Clockwise will decrease the rate of material flow. Rotating the Knob Counter-
Clockwise will increase the rate of material flow.
CAtomization Control Knob – Rotating the Knob Clockwise will reduce the atomization of mate-
rial, creating a rougher finish texture. Rotating the Knob Counter-Clockwise will increase the
atomization, creating a smoother finish texture.
DAir Flow Control – Rotating the Control Clockwise (As viewed from left side of gun) will reduce
the internal air flow. Rotating the Knob Counter-Clockwise (As viewed from left side of gun) will
increase the internal air flow.
FIG. 3FIG. 3

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FIG. 4FIG. 4
FIG. 5FIG. 5
GUN SET-UP FOR THINNER BODIED MATERIALS
A Nozzle
Unthread (FIG 4), set aside, and replace
with selected Spray Head Wand (FIG 5).
A1 Misting Spray Head Wand
For thinner materials only – Applies material
in a wide-angle fogging pattern.
A2 360° Spray Head Wand
For thinner materials only – Applies material
in a full 360° radial pattern around the
spray head.
A3 90° Spray Head Wand
For thinner materials only – Applies material
in a precise, tight, 90° pattern from the
spray head.
B Material Flow Control Knob
Rotate the Knob Clockwise to open and
maximize material flow.
C Atomization Control Knob
Rotate the Knob Clockwise to open and
maximize flow.
D Air Flow Control
Rotate the Control Clockwise (As viewed
from left side of gun) to maximize air flow.

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IMPORTANT NOTES BEFORE APPLYING MATERIAL
1. Please note that many variables affect the adjustment of a spray gun including material viscos-
ity and type, atmospheric conditions such as humidity, barometric pressure, and temperature
as well as air inlet pressure and operator preference. Always “tune” the gun before each use as
prevailing conditions may not be the same as the previous use.
2. It is always best to test spray on sheets of cardboard or masking paper with the actual material
to be applied while making the required adjustments, to become familiar with the gun and
achieve the ideal Gun settings.
3. Remember that a small amount of product wasted at this point can avoid disappointment in the
finished results and the need to re-do work later.
4. DO NOT allow Gun to tilt up or down more than 45° while spraying or while not in use to avoid
fouling of the internal passages.
• Connect Gun to compressed air supply.
• Set regulator (not included) to an initial setting of 60 PSI [5 bar]. Test spray and adjust Gun as
described in SET-UP above and increase or decrease pressure as required.
• Trigger operates similar to a HVLP paint gun.
1/2 pull trigger will allow air only to flow.
Full pull trigger will allow air and coating to flow.
• Always hang the Gun by the built-in hook between sprayings.
• When spraying is complete, follow Clean-Up procedure as described below.
This is a Pressure type of gun; higher viscosity materials will generally
require higher pressures than thinner materials however a “trial and error”
Set-up is required.

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CLEAN-UP
• Disconnect air supply to Gun.
• Remove Material Cup and pour all the unused coating possible into the original or proper
container.
• Reconnect air supply to Gun.
• This Gun is designed with a Self-Clearing feature. To activate:
- Direct the Nozzle or attached Wand Nozzle into a safe area or vessel.
- Pull the Trigger half-way to purge any leftover material from the Gun interior,
Nozzle and/or attachment Wand.
• Disconnect air supply to gun.
• Remove Material Cup.
• Wipe out any excess coating then thoroughly rinse the Material Cup with a mild solvent
compatible with the coating being used.
• Pour a small amount of mineral spirts, #10194ZP, Eastwood PRE Painting Prep, acetone or a
solvent compatible with the material being used in the Material Cup then re-attach the Material
Cup, run solvent through the Gun in a safe area until it flows clear.
• Remove air supply from the Gun.
• Pour out any unused solvent and remove the Material Cup.
• Unthread and remove the Spray Head Ring [K].
• Using a wrench (not included) on the flats, gently unthread the Spray Head [L].
• Dip a brush in solvent and gently clean any coating present.
• Allow solvent to dry completely from all components.
• Reinstall Spray Head and Ring.
DO NOT use Lacquer Thinner or other harsh solvents as they may damage
the seals in the Gun!
Follow Federal and Local Hazmat regulations and collect used solvent for
proper disposal.

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PROBLEM CAUSE CORRECTION
Gun Does Not
Spray When
Trigger is
Pulled
No air supply to
Nozzle
Open Air Flow Control in Handle.
Open Atomization Control.
Check air supply to Gun.
1/2 pull trigger will allow air only to flow.
Full pull trigger will allow air and coating to flow
Gun Sprays Air
When Trigger
is Pulled
No material
supply to
Nozzle
Depress Trigger fully (1/2 way will only discharge
air for gun clearing).
Open Material Flow Control.
Gun Dispenses
Only a Small
Amount of
Material or
None at All
Clump or piece
of material film
blocking mate-
rial inlet port
Disconnect air supply; remove Material cup, re-
move blockage from Material inlet area then strain
Material or coating to remove clumps or film.
Heavy
Textured
Material
Appearance
Nozzle is
too close to
surface
Keep within 8” to 12”.
Inlet air pres-
sure too low
Increase inlet air pressure and or increase
atomization.
Incorrect
thinner/reducer
Check material manufacturer’s reducing/
thinning instructions.
Incorrect mate-
rial mix ratios
Check material manufacturer’s mix ratio
instructions.
Material
Buildup Exces-
sively Heavy
Gun being
moved too
slowly over
surface
Speed up gun motion over surface.
Excessive fluid
flow Decrease Material flow setting.
Material mixed
too thin
Check Material manufacturer’s reducing/thinning
instructions.
TROUBLESHOOTING

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PROBLEM CAUSE CORRECTION
“Dry” Material
Appearance
Gun is too far
from surface Keep within 8” to 12”.
Material Gun
being moved
too fast over
surface
Slow down gun motion over surface.
Inlet air pres-
sure too high
Decrease gun inlet air pressure and or increase
Material flow setting.
Incorrect thin-
ner/reducer
Check Material manufacturer’s reducing/thinning
instructions.
Thin Material
Appearance
Material Gun
is too far from
surface
Keep within 8” to 12”.
Material Gun
being moved
too fast over
surface
Slow down gun motion over surface.
Inlet air pres-
sure too high
Decrease gun inlet air pressure and or increase
Material flow setting.
Incorrect thin-
ner/reducer
Check Material manufacturer’s reducing/thinning
instructions.
Spray is Sput-
tering
Gun being
tipped too far
down or up
Operate gun with Nozzle tilted no more than
45º down or up.
Nozzle or Wand
loose Tighten Nozzle or Wand.
Gun internal
passages are
contaminated
Clean gun with suitable solvent.
Gun “Spurts”
at Initial Trig-
ger Pull Then
Evens Out
Air regulator
set too far back
in line causing
pressure build
up in air line
Customer supplied air regulator must be attached
at or closer to air inlet of gun.
TROUBLESHOOTING

© Copyright 2021 Eastwood Automotive Group LLC 5/21 Instruction item #19867Q Rev 1
If you have any questions about the use of this product, please contact
The Eastwood Technical Assistance Service Department: 800.343.9353 >> email: [e-mail]
PDF version of this manual is available at eastwood.com
The Eastwood Company 263 Shoemaker Road, Pottstown, PA 19464, USA
800.343.9353 eastwood.com
ADDITIONAL ITEMS
#10041Z Eastwood PRE-Painting Prep, Aerosol
#10194ZP Eastwood PRE Painting Prep, 30 oz.
#12846Z Aerosol Injected Cleaner
#51559 Digital Regulator
#31521 Rockwood Air Coupler Set
#16327 Replacement Misting Head Wand
#16328 Replacement 360° Spray Head Wand
#16329 Replacement 90° Spray Head Wand