Central Pneumatic 93289 User manual

®
ENGINE CLEANING SPRAY GUN
Model 93289
ASSEMBLY and OPERATING
INSTRUCTIONS
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our Web site at http://www.harborfreight.com
®
Copyright©2005 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.
TO PREVENT SERIOUS INJURY,
READ AND UNDERSTAND ALL WARNINGS
AND INSTRUCTIONS BEFORE USE.
Due to continuing improvements, actual product may differ slightly from the product described herein.

Page 2SKU 93289 For technical questions, please call 1-800-444-3353.
Specifications
Save This Manual
You will need the manual for the safety warnings and precautions, assembly instructions,
operating and maintenance procedures, parts list and diagram. Keep your invoice with this
manual. Write the invoice number on the inside of the front cover. Keep the manual and
invoice in a safe and dry place for future reference.
Safety Warnings and Precautions
WARNING: When using tool, basic safety precautions should always be followed to
reduce the risk of personal injury and damage to equipment.
Read all instructions before using this tool!
1. Keep work area clean. Cluttered areas invite injuries.
2. Observe work area conditions. Do not use machines or power tools in damp or wet
locations. Don’t expose to rain. Keep work area well lit. Do not use electrically
powered tools in the presence of flammable gases or liquids.
3. Keep children away. Children must never be allowed in the work area. Do not let
them handle machines, tools, extension cords, or air hoses.
4. Store idle equipment. When not in use, tools must be stored in a dry location to
inhibit rust. Always lock up tools and keep out of reach of children. Store all cleaners
out of children’s reach.
5. 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. It will do the job better and more safely at the rate for which it was
intended. Do not modify this tool and do not use this tool for a purpose for which it
was not intended.
6. Dress properly. Do not wear loose clothing or jewelry as they can be caught in
moving parts. Protective, electrically nonconductive clothes and nonskid footwear are
recommended when working. Wear restrictive hair covering to contain long hair.
7. Use eye and ear protection. Always wear ANSI approved impact safety goggles.
Wear an ANSI approved dust mask or respirator when working around metal, wood,
and chemical dusts and mists.
8. Do not overreach. Keep proper footing and balance at all times. Do not reach over or
across running machines or air hoses.
Air Inlet 1/4”-18 NPS
Working Air Pressure 40 PSI, Do not exceed 60 PSI
Air Consumption 7 CFM @ 40 PSI
Dimensions (with cup) 6-1/2” H x 15-1/2” L x 4-1/4” W
Cup Capacity 24 Ounces

Page 3SKU 93289 For technical questions, please call 1-800-444-3353.
9. Maintain tools with care. Keep tools clean for better and safer performance. Follow
instructions for lubricating and changing accessories. Inspect tool cords and air hoses
periodically and, if damaged, have them repaired by an authorized technician. The
handle must be kept clean, dry, and free from oil and grease at all times.
10. Disconnect air supply. Disconnect air hose when not in use.
11. Avoid unintentional starting. Be sure the Trigger (12) is in the Off position when not
in use and before connecting to an air supply. Do not carry any tool with your finger on
the Trigger (12), whether it is connected to an air supply or not.
12. Stay alert. Watch what you are doing, use common sense. Do not operate any tool
when you are tired.
13. 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 control does not operate properly.
14. Guard against electric shock. Prevent body contact with grounded surfaces such as
pipes, radiators, ranges, and refrigerator enclosures.
15. 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.
16. Do not operate tool if under the influence of alcohol or drugs. Read warning
labels if taking prescription medicine to determine if your judgement or reflexes are
impaired while taking drugs. If there is any doubt, do not operate the Spray Gun.
17. Use proper size and type extension cord. If an extension cord is required for the air
compressor, it must be of the proper size and type to supply the correct current to the
air compressor without heating up. Otherwise, the extension cord could melt and catch
fire, or cause electrical damage to the air compressor. Check your air compressor’s
manual for the appropriate size cord.
18. Maintenance. For your safety, maintenance should be performed regularly by a
qualified technician.
19. Compressed air only. Never use combustible gas as a power source.
20. Use proper cleaning fluids. Only use noncorrosive, nonflammable cleaning products
that are compatible with the materials of this tool, and viscous enough to flow easily
through the Nozzle. Only use fluids in the dilution recommended by the manufacturer.
21. WARNING: The brass components of this product contain lead, a chemical known to
the State of California to cause birth defects (or other reproductive harm).
(California Health & Safety code § 25249.5,
et seq. )

Page 4SKU 93289 For technical questions, please call 1-800-444-3353.
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 perfor-
mance.
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.
Air Connection
For best service you should incorporate a regulator and inline filter, as shown in the diagram
above. Hoses, couplers, regulators, and filters are all available at Harbor Freight Tools.
1. You will need to prepare a 1/4”-18 NPS air connector (not included) to connect to the Air
Inlet (14) on the Spray Gun. First, wrap the 1/4” air connector with pipe thread seal tape
before threading it into the Air Inlet (14). Connect the 3/8” ID air source hose to a quick
connect coupler, and then to the Spray Gun.
2. Set the air pressure on the regulator to 40 PSI. Do not exceed 60 PSI.
3. Check the air connection for leaks. Disconnect from the air source.
Spray
Gun
Unpacking
When unpacking, check to make sure the product is intact and undamaged. 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.

Page 5SKU 93289 For technical questions, please call 1-800-444-3353.
Note: Only use noncorrosive, nonflammable cleaning products that are compatible with the
materials of this tool, and viscous enough to flow easily through the Nozzle.
1. Remove (un-thread) the Cup (16) from the unit and fill it with cleaning fluid (not in-
cluded).
2. Replace the Cup (16) making sure it is securely tightened to the unit.
3. Connect the air source hose to the Air Inlet (14) as described in Air Connection on
page 4. Set the air compressor to 40 PSI.
Note: Runoff may contain hazardous materials that may cause environmental damage if dis-
posed of improperly. Contact your local hazardous waste authority and the cleaning
agent supplier for disposal recommendations and regulations (if applicable).
4. Point the Spray Gun at the area needing cleaning and squeeze the Trigger (12). To
adjust the flow rate, let go of the Trigger (12), temporarily disconnect the air supply, and
unlock the Lock Ring (2). Next, to allow more liquid to flow, loosen the Fluid Nozzle (1),
and to allow less liquid to flow, tighten the Fluid Nozzle (1). After adjusted to your
satisfaction, tighten the Lock Ring (2) and reconnect the air supply. See FIGURE 2
below.
5. When finished, release the Trigger (12), and disconnect from the air source hose. Point
the Spray Gun into a waste bucket, and squeeze the Trigger (12) to make sure no
excess air is still in the Spray Gun.
FIGURE 2
Lock Nut (2)
Fluid Nozzle (1)
Operation
FIGURE 1
Fluid Nozzle (1)
Lock Ring (2)
Air Inlet (14)
Trigger (12)
Cup (16)

Page 6SKU 93289 For technical questions, please call 1-800-444-3353.
NOTE: Some parts are listed and shown for illustration purposes only and are not available
individually as replacement parts.
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN THIS
MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBU-
TOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT
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 STATES THAT ALL REPAIRS AND PARTS REPLACE-
MENTS 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 ARIS-
ING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.
Parts List
Part No. Description
1 Fluid Nozzle
2 Lock Ring
3 Air Tube
4 Material Tube
5 Gun Body
6 Bolt
70-ring
80-ring
9 Air Valve Rod
10 Spring
11 Air Valve Set
12 Trigger
13 Trigger Pin
14 Air Inlet
15 Suction Tube
16 Cup
Maintenance
1. After each use, empty the Cup (16) of any remaining cleaner. Store the fluid in its
original container, or dispose of it in accordance with local hazardous waste proce-
dures. Fill the Cup (16) with warm water, set the air compressor to 20 PSI, and connect
to the air source hose to the Spray Gun. Point the Spray Gun into a waste bucket and
run the entire Cup of warm water through the gun. If the discharged water still smells
strongly of the cleaner you used, repeat the process.
2. Wipe down the unit with a lint free cloth.

Page 7SKU 93289 For technical questions, please call 1-800-444-3353.
Assembly Drawing