SPRAY GUN
HVLP INDUSTRIAL
Model 45001
ASSEMBLY and OPERATING
INSTRUCTIONS
®
3491 Mission Oaks Blvd., Camarillo, CA 93011
Copyright © 2001 by Harbor Freight Tools®. All rights reserved. No portion of
this manual or any artwork contained herein may be reproduced in any shape or
form without the express written consent of Harbor Freight Tools.
For technical questions and replacement parts, please call 1-800-444-3353
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6. Use the right tool for the job. Do not attempt to force a small tool or attachment to do
the work of a larger industrial tool. There are certain applications for which this tool
was designed. Do not modify this tool and do not use this tool for a purpose for which
it was not intended.
7. Dress properly. Do not wear loose clothing or jewelry as they can be caught in
moving parts. Protective, electrically non-conductive clothes and non-skid footwear
are recommended when working. Wear restrictive hair covering to contain long hair.
8. Use eye and ear protection. Always wear ANSI approved impact safety goggles.
Wear a full face shield if you are producing metal filings or wood chips. Wear an ANSI
approved dust mask or respirator when working around metal, wood, and chemical
dusts and mists.
9. Do not overreach. Keep proper footing and balance at all times. Do not reach over
or across running machines.
10. Maintain tools with care. Keep tools sharp and clean for better and safer
performance. Follow instructions for lubricating and changing accessories. Inspect tool
cords and hoses periodically and, if damaged, have them repaired by an authorized
technician. The handles must be kept clean, dry, and free from oil and grease at all
times.
11. Disconnect power. When not in use disconnect from compressor.
12. Remove adjusting keys and wrenches. Check that keys and adjusting wrenches
are removed from the tool or machine work surface before plugging it in.
13. Avoid unintentional starting. Be sure the switch is in the Off position when not in
use and before plugging in. Do not carry any tool with your finger on the trigger,
whether it is plugged in or not.
14. Stay alert. Watch what you are doing, use common sense. Do not operate any tool
when you are tired.
15. Check for damaged parts. Before using any tool, any part that appears damaged
should be carefully checked to determine that it will operate properly and perform its
intended function. Check for alignment and binding of moving parts; any broken parts
or mounting fixtures; and any other condition that may affect proper operation. Any part
that is damaged should be properly repaired or replaced by a qualified technician. Do
not use the tool if any switch does not turn On and Off properly.
16. Guard against electric shock. Prevent body contact with grounded surfaces such as
pipes, radiators, ranges, and refrigerator enclosures.
17. Replacement parts and accessories. When servicing, use only identical
replacement parts. Use of any other parts will void the warranty. Only use accessories
intended for use with this tool. Approved accessories are available from Harbor Freight
Tools.
18. Do not operate tool if under the influence of alcohol or drugs. Read warning
labels on prescriptions to determine if your judgment or reflexes are impaired while
taking drugs. If there is any doubt, do not operate the tool.
SKU 45001
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REV 12/05
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19. Use proper size and type extension cord. If an extension cord is required, it must be
of the proper size and type to supply the correct current to the compressor without
heating up. Otherwise, the extension cord could melt and catch fire, or cause
electrical damage to the compressor.
20. Maintenance. For your safety, maintenance should be performed regularly by a
qualified technician.
21. Keep aware of air hoses. Be careful not to trip over air hoses while working. Check
air connections periodically.
22. Do not operate Spray Gun near open flames, pilot lights, heaters, or any other
heat source. Make sure you have adequate ventilation. Most solvents and paints
are extremely flammable, especially when sprayed. Never smoke cigarettes in the
same room your are working in.
23. Read labels on cleaning solvents and paint coatings. Chlorinated solvents such
as 111-Trichloroethane and Methylene Chloride (also known as methyl-chloride) can
chemically react with aluminum and may explode. Many paint sprayers contain
aluminum. Contact solvent manufacturer or paint supplier if your are in doubt.
24. Paints and solvents may be harmful or fatal if swallowed or inhaled. Always use
a respirator when spraying. Avoid prolonged skin contact with solvents or paints as
they will irritate skin. After contact immediately wash off exposed area with hot, soapy
water.
25. Check all Spray Gun Seals. Before use, make sure the Lid (#42) is fully tightened to
the Cup (#47). Make sure the Retaining Ring (#1) is screwed on past the first
thread, and the Air Inlet (#31) is secure.
Note: Performance of the compressor (if powered by line voltage) may vary depending on
variations in local line voltage. Extension cord usage may also affect tool performance.
Warning:The warnings, cautions, and instructions discussed in this instruction manual
cannot cover all possible conditions and situations that may occur. It must be under-
stood by the operator that common sense and caution are factors which cannot be
built into this product, but must be supplied by the operator.
Unpacking
When unpacking, check to make sure the parts listed on page 8 are included. If any parts
are missing or broken, please call Harbor Freight Tools at the number on the cover of this
manual as soon as possible.
SKU 45001
Page 4
Rev 09/01
REV 12/05
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Assembly
The only assembly required is fitting the Yoke (#39) onto the Cup (#47).
1. Slide the Yoke (#39) onto the Cup (#47) so that the grooves on the Cup (#47) connect to
the tabs on the Yoke (#39).
2. Once connected, secure by turning the Cup Lever (#40) to the left, locking it.
Operation
Warning! Never allow the Spray Gun and Cup (#47) to lay on it’s side when the Cup (#47) is
full of paint. The paint wil clog the Air Supply Tube (#48).
1. Reverse the assembly process above to remove the Yoke (#39) from the Cup (#47).
2. Mix and stir the coating according to the manufacurers specifications.
3. Fill the Cup (#47) three quarters full with coating. DO NOT OVERFILL!!
4. Reassemble the Yoke (#39) and Cup (#47) by following the assembly instructions above.
Make sure you secure the Cup Lever (#40) to the left.
Compressor Attachment
5. Set the regulator between the compressor and Spray Gun to no more than 10 PSI. Set the
compressor between 50 and 70 PSI (preferably 60 PSI).
Spray
Gun
For best service, you should incorporate an oiler, a regulator, and an inline air filter, as shown
above. All are available at Harbor Freight Tools.
6. Connect the air hose to the Air Inlet (#31).
Spraying Techniques
Note: Use the lowest possible pressure setting on the inline regulator.
1. Spray from a distance of approximately eight inches while keeping the Spray Gun perpen-
dicular to the ground. Activate Gun by depressing the Trigger (#8).
2. Maintain your distance as you evenly move from side to side. Do not fan or arc the Spray
Gun or the paint will apply unevenly.
3. Keep the Fluid Control Screw (#36) turned all the way in when beginning to spray. Once
started, you may unscrew it slightly and slowly to atomize the spray.
4. The Adjusting Screw (#28) controls the amount of coating sprayed. Screw it all the way
in and the minimum amount of coating is released. The more you screw it out, the more
coating is dispensed. Never unscrew more than five threads during operation!.
SKU 45001
Page 5
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Operation (continued)
5. For an even finish, cover your work using smooth even strokes and a 50% overlap.
Note: This HVLP Industrial Spray Gun will not blotch or model when using any coating.
Note: During operation, periodically check that the Yoke (#39) is securely fastened to the
Cup (#47). The Cup Lever (#40) must be securely tightened to the left.
Note: If you are unsatisfied with the results, check the Troubleshooting section further down
this page.
Pattern Control
This Spray Gun will spray three jet shapes and two different fan sizes. Never attempt to
adjust the jet shape or fan size when firing the Spray Gun. Keep your hand away from
the Trigger (#8) while adjusting jet shape or fan size.
1. To adjust the fan size, turn the Retainer Ring (#1). Screw the Retainer Ring (#1) in, to
widen the spray, and screw it out, to narrow the pattern. Unscrew a maximum of one
thread!
2. The Air Cap (#2) adjusts the jet shape. Hold the Spray Gun in firing position (perpendicu-
lar to the ground). Turn the Air Cap (#2) parallel to the ground for a vertical jet. For a hoizontal
jet, turn the Air Cap (#2) perpendicular to the ground. For a round jet, affix the Air Cap (#2)
halfway between the two at a 45 degree angle to the ground.
TroubleShooting
Problem 1: Heavy top/bottom, or right/left pattern.
Cause:
Material buildup on Air Cap (#2).
Partially plugged Air Cap (#2) horn or center holes.
Remove Air Cap (#2), soak in solvent, and wipe clean.
Material partially plugging Tip of Gun.
Solution:
Cause:
Solution:
Cause:
Remove Tip and clean.
Damaged Needle (#24).
Solution:
Remove and replace the Needle (#24) by first removing the Needle Cap (#26)
and the Needle Lock Nut (#25).
Problem 2: Heavy Center Pattern
Cause:
To much material.
Solution:
Cause:
Reduce fluid flow with the Adjusting Screw (#28).
Coating too thick.
Solution:
Thin out coating.
Problem 3: Split spray pattern.
Cause:
Pressure to high.
Solution:
Cause:
Reduce air pressure at the regulator.
Not enough material.
Solution:
Increase fluid flow with Adjusting Screw (#28).
Problem 4: Jerky or fluttering spray.
Cause:
Insufficient fluid.
Solution:
Cause:
Solution:
Cause:
Solution:
Cause:
Solution:
Fill Cup (#47).
Gun and Cup (#47) tipped at excessive angle.
Correct angle.
Obstructed Fluid Tube (#38).
Clean
Loose or cracked Fluid Tube (#38) in Cup (#47).
Tighten or replace.
SKU 45001
Page 6
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Problem 4 (Continued)
Cause:
Loose or cracked Needle (#24).
Solution:
Cause:
Solution:
Cause:
Tighten or replace.
Fluid too heavy for suction feed.
Thin material
Dry or worn Packing (#10) or Bushings (#11,12).
Lubricate, replace, or tighten.
Solution:
Problem 5: Will not spray.
Cause:
Low air pressure at Spray Gun.
Solution:
Cause:
Solution:
Cause:
Check lines for kinks.
Closed Adjusting Screw (#28).
Open
Fluid too heavy for suction feed.
Thin material.
Solution:
Problem 6: Dripping from tip.
Cause:
Worn Needle (#24).
Solution:
Replace (follow instructions in Maintenance section).
Maintenance
1. Periodically check the Gasket (#43) for wear (replace if necessary). Keep the air holes
clean.
2. Check for Needle (#24) wear (not uncommon). Look for tip wear and wear at the contact
point of the Needle (#24) and the Packing (#10). To replace Needle (#24), carefully remove
spring loaded Adjusting Screw (#28) by twisting and pulling the Needle Cap (#26) and the
Needle Lock Nut (#25). The Spring (#27) will pop out. Replace Needle (#24), and reas-
semble by reversing the directions above.
3. After each use, unscrew and remove Muffler (#16). Blow out with air or wash if necessary.
Reminder: Replacement parts available at Harbor Freight Tools.
Cleaning (Gun should be attached to compressor to complete the cleaning process)
Warning!! Do not use paint strippers on this unit as they will damage the aluminum. Never
allow the unit to lay on it’s side while coating is in the Cup (#47).
1. Be careful, as the Cup (#47) may still be pressurized. Loosen the Fluid Control
Screw (#36) to relieve pressure. Empty paint from Cup (#47) and add small amount of clean
solvent. Replace Lid (#42) and shake Cup (#47) vigorously. At the lowest possible pressure,
spray out the solvent into a waste bucket (make sure you are wearing respirator and eye
protection).
2. Empty Cup (#47) of remaining solvent and repeat the process until the Cup (#47) solvent
appears clean and free of the coating.
3. Disconnect air supply. Remove surplus solvent and wipe the Cup (#47) clean with a lint
free cloth.
Note: The Cup (#47) may be fully immersed in solvent for no more than 24 hrs. if needed.
Lubrication (before and after each use).
1. Using a non-silicon spray, lube the expose parts of the Needle (#24) surrounding the
Trigger (#8). Lube the Trigger Stud (#9) so it moves freely.
2. Remove Adjusting Screw (#28) and lubricate threads. Replace.
3. Unscrew Fluid Control Screw (#36) and lube Fluid Control Elbow (#32). Remove Air
Supply Tube (#48) and check and clean. Do the same for the No-Drip Elbow
Assembly (#45). Replace.
SKU 45001
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Parts List
Part No.
1
2
3
4
5
6
7
8
Description
Retainer Ring
Air Cap
Air Cap Plate
Air Cap Spring
Fluid Nozzle
Gun Body
Screw
Trigger
Trigger Stud
Packing
Bushing
Bushing
Safety Valve
Spring
Fluid Adjusting Screw
Muffler
Spindle Housing
Spring
Spindle Assembly
Spring
Spindle Housing
O-ring
Adjusting Screw Receiver
Needle
Part No.
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Description
Needle Lock Nut
Needle Cap
Spring
Adjusting Screw
O-ring
Air Inlet Adapter
Air Inlet
Fluid Control Elbow
Steel Ball
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Spring
Seal
Fluid Control Screw
Fluid Connector
Fluid Tube
Yoke
Cup Lever
Cup Lever Spacer
Lid
Gasket
Nut
No-Drip Elbow Assembly
No-Drip Tube
Cup
Air Supply Tube
PLEASE READTHE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDEDTHE PARTS DIAGRAM INTHIS
MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBU-
TOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KINDTOTHE BUYERTHAT HE
OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE IS
QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER
AND/OR DISTRIBUTOR EXPRESSLY STATESTHAT ALL REPAIRS AND PARTS REPLACEMENTS
SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS AND NOT BY THE
BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER
REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING
OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.
NOTE: Some parts are listed and shown for illustration purposes only and are not available
individually as replacement parts.
SKU 45001
Page 8
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IMPORTANT: Before using for the first time, the spray gun must be cleaned
using a solvent based thinner. If not removed, the red oil used by the
manufacturer for testing and corrosion protection may contaminate paint.
IMPORTANT: The Spray Gun must be cleaned immediately after use.
Improper cleaning is a common reason for the Spray Gun not to work.
Assembly Drawing
SKU 45001
Page 9
REV 10/06
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90 Day Warranty
Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards,
and warrants to the original purchaser that this product is free from defects in materials and workmanship for the
period of 90 days from the date of purchase. This warranty does not apply to damage due directly or indirectly,
to misuse, abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity, improper
installation, normal wear and tear, or to lack of maintenance. We shall in no event be liable for death, injuries
to persons or property, or for incidental, contingent, special or consequential damages arising from the use of
our product. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the
above limitation of exclusion may not apply to you. THiS WarranTy iS expreSSly in lieu oF all oTHer
WarranTieS, expreSS or implied, inCluding THe WarranTieS oF merCHanTabiliTy and FiTneSS.
To take advantage of this warranty, the product or part must be returned to us with transportation charges
prepaid. proof of purchase date and an explanation of the complaint must accompany the merchandise.
If our inspection verifies the defect, we will either repair or replace the product at our election or we may
elect to refund the purchase price if we cannot readily and quickly provide you with a replacement. We will
return repaired products at our expense, but if we determine there is no defect, or that the defect resulted
from causes not within the scope of our warranty, then you must bear the cost of returning the product.
This warranty gives you specific legal rights and you may also have other rights which vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353
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