Harbor Freight Tools Paint Sprayer 45001 User Manual

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  
 
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  
Page 3  
REV 12/05  
 
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  
 
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  
 
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  
 
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  
Page 7  
 
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  
 
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  
 
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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