MODEL H8224
HVLP SPRAY GUN
INSTRUCTION MANUAL
WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE
OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.
COPYRIGHT © AUGUST, 2007 BY GRIZZLY INDUSTRIAL, INC.
#TR9837 PRINTED IN CHINA
SAFETY
For Your Own Safety Read Instruction Manual
Before Operating This Equipment
The purpose of safety symbols is to attract your attention to possible hazardous conditions. This manual uses a series of symbols and signal words which
are intended to convey the level of importance of the safety messages. The
progression of symbols is described below. Remember that safety messages by
themselves do not eliminate danger and are not a substitute for proper accident
prevention measures.
Indicates an imminently hazardous situation which,
if not avoided, WILL result in death or serious injury.
Indicates a potentially hazardous situation which, if
not avoided, COULD result in death or serious injury.
Indicates a potentially hazardous situation which, if
not avoided, MAY result in minor or moderate injury.
It may also be used to alert against unsafe practices.
This symbol is used to alert the user to useful informa-
NOTICE
tion about proper operation of the equipment.
Safety Instructions For Spray Guns
1. READ THIS MANUAL. This gun may
cause personal injury if used incorrectly. This manual contains proper
safety and operating instructions that
must be followed to reduce this risk.
2. WEAR EYE PROTECTION. Material
sprayed into eyes may cause serious injury or blindness. Always wear
safety goggles ANSI approved for
spraying (sealing type) to reduce your
risk from this hazard.
3. SPRAY IN VENTILATED AREA.
Airborne particles and fumes are
toxic and can cause brain damage or
death. To reduce your risk, only use
the spray gun in a well ventilated area
with adequate supply of fresh air.
Model H8224 HVLP Spray Gun -1-
4. WEAR A RESPIRATOR. Airborne
material from spraying can be very
hazardous to lungs. Always wear a
respirator NIOSH approved for spraying and fumes of your material type;
or use a supplied air respirator system that delivers fresh air from an
outside location via hoses.
5. MAINTAIN EQUIPMENT. Pressurized
spray guns or hoses may burst unexpectedly if damaged or poorly maintained, causing serious injury. Fix
air leaks immediately and follow all
recommended maintenance. Never
operate this spray gun with loose
or disassembled components. Never
modify the spray gun.
6. USE CORRECT AIR PRESSURE.
Exceeding the maximum PSI rating
of this spray gun may cause unpredictable operation or bursting.
7. DISCONNECT AIR PRESSURE
before servicing, changing accessories, or moving to another location.
Never leave this spray gun unattended when connected to air.
8. AVOID IGNITION SOURCES.
Spraying around ignition sources
may cause fire or an explosion.
Do not spray around any ignition
sources or potential ignition sources.
Be aware of appliances that have
pilot lights or machinery that creates sparks during operation. Do not
smoke in the spraying area or when
spraying.
9. FIRE EXTINGUISHERS. Always
have a fully charged multi-class
or class B fire extinguisher in the
immediate area.
10. AVOID UNI N T ENTIO N A L
OPERATION. Always disconnect air
when not in use, and do not carry
tool with hand on trigger.
11. KEEP CHILDREN AWAY. Avoid
injury to children by keeping them
away from this spray gun. Disconnect
and lock the spray gun away when
not in use.
12. AVOID USE WHEN TIRED OR ON
DRUGS OR ALCOHOL. Avoid using
this spray gun if you are overly tired
or intoxicated. Using this spray gun
during these times may increase the
risk of injury or fire.
13. UNTRAINED & UNSUPERVISED
USE. Untrained operators may not be
aware of the safe use of this spray gun
and may injure themselves or cause
fire. All untrained operators must be
directly supervised at all times if using
this spray gun.
14. READ MATERIAL LABELS and
MATERIAL SAFETY DATA SHEETS
(MSDS). Read and know all the
instructions on the packaging label
and the MSDS before opening the
package. This information could save
your life.
15. PROTECTIVE CLOTHING. Protect
exposed skin from overspray by wearing a protective suit or other approved
garment.
16. INAPPROPRIATE USE. DO NOT
point or shoot spray gun directly at
yourself or another person or animals.
Do not attempt to use the spray gun for
any other use than it was intended.
17. STORAGE. Thoroughly clean and dry
spray gun before storage. Store in an
approved cabinet.
18. BE AWARE OF HOSE LOCATION.
Hoses can easily become a tripping
hazard when laid across the floor in a
disorganized fashion.
19. SOLVENTS. Always store solvents
and shop towels soaked in solvent in
approved containers.
20. LOCAL LAWS. Consult local authorities regarding exhaust and waste disposal requirements.
Model H8224 HVLP Spray Gun-2-
INTRODUCTION
Foreword Specifications
The specifications, details, and photographs
in this manual represent the Model H8224
as supplied when the manual was prepared.
However, owing to Grizzly’s policy of
continuous improvement, changes may be
made at any time with no obligation on the
part of Grizzly.
If you have any comments regarding this
manual, please write to us at the following
address:
Grizzly Industrial, Inc.
C/O Technical Documentation
P.O. Box 2069
Bellingham, WA 98227-2069
Email: manuals@grizzly.com
Most importantly, we stand behind our
tools. If you have any service questions or
parts requests, please call or write us at
the location listed below.
Grizzly Industrial, Inc.
1203 Lycoming Mall Circle
Muncy, PA 17756
Phone: (570) 546-9663
Fax: (800) 438-5901
E-Mail: techsupport@grizzly.com
Web Site: http://www.grizzly.com
Cup Size ............................................120cc
Feed Type .......................................Gravity
Fluid Tip Size ................................... 0.8mm
Air Consumption .................... 4.2–7.1 CFM
Operating Pressure Range ........ 44–58 PSI
Max. Air Pressure .......................... 120 PSI
Cup Material .....................................Plastic
Pattern Width ......... 71⁄8"-93⁄4" (180–250mm)
Body Material ............................. Aluminum
Air Inlet Size ...................................1⁄4" NPT
Read the manual before operation.
Become familiar with this tool, its
safety instructions, and its operation
before beginning any work. Serious
personal injury may result if safety
or operational information is not
understood or followed.
Model H8224 HVLP Spray Gun -3-
SETUP
Inventory
Your spray gun left our warehouse in a
carefully packed box. If you discover the
spray gun is damaged after you have
signed for delivery, please immediately
call Customer Service at (570) 546-9663
for advice.
Save all packing materials for possible
inspection by the carrier or its agent.
Otherwise, filing a shipping claim can be
difficult.
After you have unpacked the box, you
should find the following items with
your spray gun:
Model H8224 Inventory (Figure 1) Qty
A. Cup 120cc .......................................... 1
B. Multi-Wrench ...................................... 1
C. Cleaning Brush .................................. 1
D. Barbed Hose Fitting w/Nut ................. 1
E. Plastic Filters ...................................... 2
Note: One of the plastic filters may
come pre-installed in the spray gun.
Assembly & Setup
Before assembling and using the spray gun,
thoroughly clean and dry all parts. Please
refer to Cleaning in the MAINTENANCE
section on Page 10 for more detailed
instructions. Make sure all connections are
tight enough to prevent air leaks but not so
tight as to damage the tool.
To setup the spray gun:
1. Insert the filter into the gun body (see
Figure 2). Note: One of the plastic
filters may come pre-installed in the
spray gun; if so, skip this step.
Figure 2. Installing filter.
A
C
Figure 1. Inventory components shipped
with Model H8224.
D
B
E
2. Attach the cup to the gun body as
shown in Figure
Cup
Gun Body
Figure 3. Cup installed.
Model H8224 HVLP Spray Gun-4-
3.
Connection
Point
Air Fitting
3. Install and tighten the barbed hose
fitting to the air inlet with the provided
nut; or attach a female 1⁄4" NPT quick
connect fitting (not included) to the air
inlet for connection to an air coupler.
Note: Using a 1⁄4" NPT quick discon-
nect set-up, will make operation and
maintenance tasks easier.
4. Attach the spray gun to an air hose
regulated between 44 and 58 PSI.
Controls
Atomizing Cap
Cup
Fluid Control
Note: For the best results, use a hose
that will be dedicated for spray use
only. Do not use a hose that has been
used with an in-line oiler or other possible contaminant.
If you need additional help with this assembly, call our Technical Support at: (570)
546-9663.
Pattern Control
Trigger
Air Flow Control
Figure 4. Controls.
• Fluid Control: Controls the volume of
material that travels through the fluid
tip.
• Pattern Control: Adjusts the spray
pattern from a round pattern to a wide
fan.
• Atomizing Cap: Controls the spray
pattern from vertical to horizontal.
• Trigger: Squeeze the trigger half way
to blow air, or squeeze all the way to
spray.
• Air Flow Control: Controls the fluid
pressure inside the spray gun.
• Cup: Holds up to 120cc of material for
spraying.
Model H8224 HVLP Spray Gun -5-
OPERATIONS
EXPLOSION HAZARD!
DO NOT smoke or allow any source
of flame or spark near spraying.
Vapors will explode if ignited.
Spraying
The Model H8224 HVLP spray gun set
is designed to spray a wide variety of
materials such as lacquers, stains, primers, multi-component paints, clear coats,
acrylics, epoxies etc. It is ideal for auto
body and woodworking projects.
To use your spray gun :
1. Read and follow the material manufac-
turer's instructions for spraying, mixing,
safety, disposal, and any other instruction on the label or Material Safety Data
Sheet (MSDS).
2. Ensure the cup is securely tightened
and all other fittings are secure to avoid
air leaks or material spills.
EYE AND RESPIRATORY HAZARD!
Always wear ANSI approved goggles
and a NIOSH approved respirator
when using spray equipment. Failure
to protect yourself can lead to severe
eye/ lung injuries.
TOXIC FUMES!
Only spray in well ventilated areas
or an approved spray booth. NEVER
spray in a confined space where
toxic fumes and flammable vapors
can accumulate to deadly levels.
3. Set the inlet air pressure (the air com-
ing to the spray gun) to the lowest pressure recommended in Specifications
on Page 3 or to the material manufacturer's recommendations.
4. Adjust the atomizing cap to vertical or
horizontal. See Atomizing Cap and
Fan Adjustments on Page 8 for further explanation.
5. Fill the cup with material.
6. Trial-and-error are necessary to
achieve the results you want along with
a fair amount of practice. Test your
material flow and spray pattern on a
piece of cardboard or some scrap of
material similar to your project.
Model H8224 HVLP Spray Gun-6-
7. Adjust the fluid control knob to start
with a low volume of material and keep
the atomization as low as possible.
You will need to use a combination of
fluid control, inlet air pressure, air flow
control and stroke speed to achieve the
results you want. Spray so the material
wets out nicely without running or sagging.
8. Use the pattern control knob to adjust
the spray fan to your desired pattern.
9. Keep the gun tip perpendicular, parallel
and 6"-12" from the work at all times
when spraying, as shown in Figure
5. Do not allow your wrist to bend.
This will cause the gun to arc across
the surface and distribute the material
unevenly, possibly creating sags and
dry spots.
10. Begin spraying 2-3 inches before the
work and continue to the end of the
work. Continue the motion for a few
inches past the work until you are
ready for the return stroke.
11. Maintain an even speed when spraying.
12. Overlap each stroke by 50%. This will
ensure even coverage as shown in
Figure 6. Overlapping less than 50%,
as shown in the figure to the right,
may lead to missed spots or streaky
results.
No
Figure 5. Spray technique.
Yes
Figure 6. Overlap technique.
13. The spray stroke should have even con-
sistency and parallel edges. If it doesn't,
please refer to Troubleshooting on
Page 12.
NOTICE
Tipping the spray gun may cause
material to spill out of the cup. Always
hold the spray gun perpendicular to
the ground to avoid potential spills
and feed problems.
Model H8224 HVLP Spray Gun -7-
CONTAMINATION HAZARD!
Dispose of paint waste in a responsible
manner! Follow manuf acturer's
recommendations and local laws
regarding disposal.
Atomizing Cap and
Fan Adjustments
Pattern
atomizing cap can be adjusted for
The
horizontal or vertical spraying patterns.
Spraying in the wrong direction may lead
to material build up on the atomizing cap
horn. Many performance problems are
caused by clogged atomizing holes on the
atomizing cap horns (see Cleaning on
Page 10).
Stroke
Figure 7. Set up for vertical stroke
direction with horizontal fan pattern.
Pattern
Pattern
Control
Stroke
Pattern
Control
Figure 8. Set up for horizontal spray stroke
with vertical fan pattern.
Rotating the pattern adjustment knob (see
4) changes the shape of the spray
Figure
pattern from a wide spray to a narrow
spray, as shown in Figure 9.
Figure 9. Fan adjustment.
Model H8224 HVLP Spray Gun-8-
ACCESSORIES
G62 61— Campbell Hausfeld™ Water
Filter
Filtering out water and oil before it reaches
the spray gun is critical for high quality
spraying results. This filter is rated at 150
PSI maximum air pressure, and has a 1⁄4"
NPT air inlet.
Figure 10. G6261 Campbell Hausfeld™
water filter.
G8114—3⁄8 " x 25 Ft. Air Hose
G8115—3⁄8 " x 50 Ft. Air Hose
G8116—3⁄8 " x 100 Ft. Air Hose
We recommend dedicating an air hose for
spraying use only, keeping it clean and
free of water and oil by using a filter on the
incoming end. Multi-purpose red rubber
air hose is flexible and abrasion resistant.
Features 200 PSI rating, 800 PSI bursting
strength, and 1⁄4" NPT ends.
H7274— Campbell Hausfeld™ Pressure
Regulator
Since PSI drops as it travels through air
hose, attaching a regulator directly to the
spray gun ensures accurate air regulation
for the best results possible. Provides
regulated output pressure of 0 to 125 PSI
for proper tool operation. Locking pressure
knob prevents accidental adjustments. 15
SCFM flow capacity @ 90 PSI. 1⁄4" NPT.
Figure 12. H7274 Campbell Hausfeld™
pressure regulator.
H3275 —1⁄4" NPT x 25' Recoil Hose
H3276 —1⁄4" NPT x 50' Recoil Hose
These recoil hoses are great dedicated air
hoses because they are extremely light
weight and maneuverable, which makes
hours of spraying less tiring on wrists and
arms.
Figure 11. Red rubber air hose.
Model H8224 HVLP Spray Gun -9-
Figure 13. H3275 Coil Hose.
MAINTENANCE
Cleaning
Proper cleaning is the best way to ensure
trouble free performance from your spray
gun. If your gun is not thoroughly cleaned,
damage and poor spraying will result.
Problems caused by improper cleaning will
not be covered by the warranty. Clean the
spray gun immediately after each use.
To clean your spray gun:
1. Empty the cup and spray a small
amount of solvent through the gun.
Note: If you are spraying on a regular
basis, spraying solvents into the air
may be illegal. A cabinet style spray
gun cleaner may be required.
2. DISCONNECT SPRAY GUN FROM
AIR!
3. Remove the cup and cup lid.
5. Unscrew the atomizing cap and the
fluid tip. The fully disassembled gun
should look like Figure 14.
6. Rinse all par ts thoroughly in solvent,
then dry with compressed air or let
air dry. Try not to expose O-rings to
solvent or they may get damaged.
Note: If the small holes in the atomiz-
ing cap become blocked, soak in clean
solvent. If the blockage still exists,
clear the blockage with a small needle,
taking great care to not enlarge or
damage the hole. Damage to the hole
will create a disrupted spray pattern.
7. Use the cleaning brush with solvent to
clean the inner orifice and other hard
to reach areas on the outside of the
spray gun body.
8. Wipe the gun body with a lint free
cloth and lubricate parts (see Page 11)
before re-assembly.
4. Disassemble the gun by unscrewing
the fluid control knob then remove the
spring and needle.
Atomizing Cap
Cup
Spring
Fluid Tip
Needle
Figure 14. Disassembly for cleaning.
Knob
EXPLOSION HAZARD!
Chlorinated Solvents like 1,1,1Tricloroet ha ne and Me thylene
Chloride (methyl chloride) can chemically react with aluminum spray gun
parts and explode. Read solvent
label carefully to avoid using solvent
with these chemicals.
NOTICE
DO NOT soak the spray gun body in
solvent. Prolonged exposure to solvent will rapidly deteriorate the spray
gun washers and seals. Ignoring this
notice will void your warranty.
Model H8224 HVLP Spray Gun-10-
Lubrication
Lubricate the following areas with a nonsilicon spray-gun lubricant after cleaning.
A. Atomizing Cap Threads
B. Air Valve Packing
C. Trigger Pin
D. Pattern Control
E. Fluid Control Knob
F. Air Flow Control Knob
Allow the lubricant to coat threads, and run
into gun body to lubricate all moving parts
and seals.
A
C
F
Figure 15. General lubrication points.
B
E
D
Model H8224 HVLP Spray Gun -11-
Troubleshooting
Symptom Possible Cause Solution
Fluttering or spitting
spray.
Uneven top or bot
tom pattern.
1. Dry or worn fluid tip seat permits air to seep into fluid passage.
2. Material level too low.
3. Fluid tip or filter obstructed.
4. Dry needle packing.
-
1. Atomizing cap holes are
obstructed.
2. Build-up on top or bottom of
3. Build-up on atomizing cap is
.
fluid tip
on needle seat.
1. Tighten fluid tip or replace
seat with new one.
2. Add material.
3. Clean.
4. Lubricate needle.
1. Clear holes.
2. Clean.
3. Clean.
Right or left arc
pattern.
Heavy deposit of
material in center.
Narrow center pat
tern.
No spray output
1. Left or right side horn holes
are plugged.
2. Build-up on left or right side of
fluid tip.
3. Build-up of material inside
atomizing cap.
1. The material flow exceeds the
atomizing cap capacity.
2. Inlet air pressure is too low.
3. Material is too thick.
-
1. Volume control turned in too
far.
2. Inlet air pressure too high.
3. Fluid pressure is too low.
4. Material is too thin.
. 1. No pressure at gun.
2. Fluid passages dirty.
3. Fluid control closed.
4. Out of paint.
5. Material too thick.
1. Clear holes.
2. Clean.
3. Clean.
1. Lower fluid flow.
2. Increase inlet air pressure.
3. Thin material.
1. Increase volume.
2. Reduce inlet air pressure.
3. Increase fluid pressure.
4. Adjust material.
1. Check air supply.
2. Clean gun, remove any
obstructions.
3. Open.
4. Refill.
5. Thin to manufacturer's rec
ommendations.
-
Model H8224 HVLP Spray Gun-12-
Symptom Possible Cause Solution
Excessive overspray.
Unable to control
spray fan.
Runs and sags. 1. Damaged seal. 1. Replace damaged seals.
Material leaks from
cup.
Material leaks from
gun.
Thick dimpled fin
ish: orange peel
appearance.
Dry Spray.
Gun leaks from
fluid tip.
Contaminated
paint: fish eye
appearance.
1. Fluid pressure too high.
2. Gun is too far from surface.
3. Spraying too fast.
1. Pattern adjustment screw is
not seating properly
2. Atomizing cap is loose.
1. Cap not secure.
2. Cup not tight on gun body.
3. Leaking from cap vent hole.
1. Fluid tip loose.
2. Dry or damaged seals.
3. Excessive pressure.
-
1. Holding gun too close to surface.
2. Inlet air pressure too low.
3. Material not properly mixed.
4. Surface is dirty or oily.
1. Inlet air pressure too high.
2. Gun too far from surface.
3. Gun stroke too fast.
1. Debris will not let the needle
seat with the fluid tip.
1. Water or oil in the air line. 1. Install an in-line air filter.
.
1. Reduce fluid pressure.
2. Keep gun at recommended
distance.
3. Slow down and maintain
consistent, even parallel
stroke.
1. Clean or replace.
2. Tighten atomizing cap.
1. Tighten
2. Tighten.
3. Hold gun upright; do not tilt.
1. Tighten.
2. Replace
3. Reduce pressure.
1. Spray at recommended dis-
2. Check inlet air pressure.
3. Follow manufacturer's
4. More surface prep is
1. Lower inlet air pressure.
2. Keep gun at recommended
3. Slow down and maintain
1. Clean or replace both.
2. Replace air line.
.
seals.
tance.
instructions.
required.
distance.
consistent even parallel
stroke.
Model H8224 HVLP Spray Gun -13-
Parts Breakdown H8224
REF PART # DESCRIPTION REF PART # DESCRIPTION
1 PH8224001 AIR ADJUST SCREW 26 PH8224026 TRIGGER PIN II
2 PH8224002 AIR ADJUST KNOB 27 PH8224027 TRIGGER
3 PORS003 O-RING 2.5 X 1.5 S3 28 PEC01M E-CLIP 3MM
4 PH8224004 DOMED SEAL WASHER 29 PH8224029 CUP LID
5 PH8224005 AIR INLET SPRING 30 PH8224030 CUP 120CC
6 PH8224006 AIR INLET VALVE 31 PH8224031 PLASTIC FILTER
7 PH8224007 SWITCH SPRING 32 PH8224032 FLUID INLET JOINT
8 PH8224008 AIR VALVE ASSEMBLY 33 PH8224033 FLUID ADJUST NEEDLE
9 PH8224009 FOAM WASHER 34 PH8224034 FLUID NEEDLE SPRING
10 PORS005 O-RING 4.5 X 1.5 S5 35 PH8224035 FLUID ADJUST LOCK NUT
11 PH8224011 SWITCH KNOB 36 PH8224036 FLUID ADJUST KNOB
12 PH8224012 SWITCH WASHER 37 PH8224037 FLAT HD SCR M2.5-.45 X 8
13 PH8224013 DIRECTION SCREW 38 PH8224038 PATTERN ADJUST KNOB
14 PH8224014 ATOMIZATION CAP NUT 39 PH8224039 PATTERN ADJUST SCREW
15 PH8224015 ATOMIZATION CAP WASHER 40 PORS003 O-RING 2.5 X 1.5 S3
16 PH8224016 ATOMIZATION CAP 41 PEC16M E-CLIP 2.5MM
17 PH8224017 STEEL BALL 42 PH8224042 PATTERN ADJUST NUT
18 PORS018 O-RING 17.5 X 1.5 S18 43 PH8224043 GUN BODY
19 PH8224019 FLUID NOZZLE 44 PH8224044 AIR INLET JOINT
20 PH8224020 FLUID NOZZLE WASHER 45 PH8224045 O-RING REPAIR KIT
21 PH8224021 DIRECTION SCREW 46 PH8224046 BARBED HOSE FITTING
22 PH8224022 NEEDLE WASHER 47 PH8224047 FLARE NUT 1/4" NPT
23 PH8224023 FOAM WASHER 48 PH8224048 PIPE CLEANER BRUSH
24 PH8224024 COMPRESSION SPRING 49 PH8224049 M-WRENCH 7/8/10/12/13/16
25 PH8224025 TRIGGER PIN I
Model H8224 HVLP Spray Gun-14-
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