Central Pneumatic 93755 Istruzioni per il montaggio
93755
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Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the
back of the manual near the assembly diagram (or month and year of purchase if product has no number).
Keep this manual and the receipt in a safe and dry place for future reference. 21f
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
Copyright© 2021 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.
Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein.
Tools required for assembly an d se rv ic e may n ot b e in cl uded.
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
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Table of Contents
Safety ......................................................... 2
Specifications ............................................. 4
Setup .......................................................... 5
Operation .................................................... 8
Maintenance ............................................... 9
Parts List and Diagram .............................. 11
Warranty .................................................... 12
WARNING SYMBOLS AND DEFINITIONS
This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that
follow this symbol to avoid possible injury or death.
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Addresses practices not related to personal injury.
IMPORTANT SAFETY INSTRUCTIONS
INSTRUCTIONS PERTAINING TO A RISK OF FIRE,
ELECTRIC SHOCK, OR INJURY TO PERSONS
WARNING – When using tools, basic precautions should always be followed, including the following:
General
To reduce the risks of electric shock,
fire, and injury to persons, read all the
instructions before using the tool.
Work Area
1. Keep the work area clean and well lighted.
Cluttered benches and dark areas increase the
risks of electric shock, fire, and injury to persons.
2. Do not operate the tool in explosive atmospheres,
such as in the presence of flammable liquids,
gases, or dust. The tool is able to create sparks
resulting in the ignition of the dust or fumes.
3. Keep bystanders, children, and visitors away
while operating the tool. Distractions are able
to result in the loss of control of the tool.
Page 3For technical questions, please call 1-888-866-5797.Item 93755
Personal Safety
1. Stay alert. Watch what you are doing and
use common sense when operating the tool.
Do not use the tool while tired or under the
influence of drugs, alcohol, or medication.
A moment of inattention while operating the
tool increases the risk of injury to persons.
2. Dress properly. Do not wear loose
clothing or jewelry. Contain long hair.
Keep hair, clothing, and gloves away from
moving parts. Loose clothes, jewelry, or long
hair increases the risk of injury to persons as
a result of being caught in moving parts.
3. Avoid unintentional starting. Be sure the switch
is off before connecting to the air supply.
Do not carry the tool with your finger on the switch or
connect the tool to the air supply with the switch on.
4. Remove adjusting keys and wrenches
before turning the tool on. A wrench or a
key that is left attached to a rotating part of the
tool increases the risk of personal injury.
5. Do not overreach.
Keep proper footing and balance at all times.
Proper footing and balance enables better
control of the tool in unexpected situations.
6. Use safety equipment.
A dust mask, non-skid safety shoes and
a hard hat must be used for the
applicable conditions.
7. Always wear eye protection.
Wear ANSI-approved safety goggles.
8. Always wear hearing protection
when using the tool.
Prolonged exposure to high intensity
noise is able to cause hearing loss.
Tool Use and Care
1. Use clamps or another practical way to secure
and support the workpiece to a stable platform.
Holding the work by hand or against the body is
unstable and is able to lead to loss of control.
2. Do not force the tool. Use the correct tool for the
application. The correct tool will do the job better
and safer at the rate for which the tool is designed.
3. Do not use the tool if the switch does not turn the
tool on or off. Any tool that cannot be controlled
with the switch is dangerous and must be repaired.
4. Disconnect the tool from the air source
before making any adjustments, changing
accessories, or storing the tool. Such preventive
safety measures reduce the risk of starting the
tool unintentionally. Turn off and detach the air
supply, safely discharge any residual air pressure,
and release the throttle and/or turn the switch to
its off position before leaving the work area.
5. Store the tool when it is idle out of reach
of children and other untrained persons.
A tool is dangerous in the hands of untrained users.
6. Maintain the tool with care. Keep a cutting
tool sharp and clean. A properly maintained tool,
with sharp cutting edges reduces the risk
of binding and is easier to control.
7. Check for misalignment or binding of moving
parts, breakage of parts, and any other condition
that affects the tool’s operation. If damaged,
have the tool serviced before using. Many accidents
are caused by poorly maintained tools.
There is a risk of bursting if the tool is damaged.
8. Use only accessories that are identified by the
manufacturer for the specific tool model. Use of
an accessory not intended for use with the specific
tool model, increases the risk of injury to persons.
Service
1. Tool service must be performed only
by qualified repair personnel.
2. When servicing a tool, use only identical
replacement parts. Use only authorized parts.
Page 4 For technical questions, please call 1-888-866-5797. Item 93755
Air Source
1. Never connect to an air source that
is capable of exceeding 200 psi.
Over pressurizing the tool may cause
bursting, abnormal operation, breakage
of the tool or serious injury to persons.
Use only clean, dry, regulated compressed air at the
rated pressure or within the rated pressure range as
marked on the tool. Always verify prior to using the
tool that the air source has been adjusted to the rated
air pressure or within the rated air-pressure range.
2. Never use oxygen, carbon dioxide, combustible
gases or any bottled gas as an air source
for the tool. Such gases are capable of
explosion and serious injury to persons.
Specific Safety Instructions
1. The warnings and precautions discussed in this
manual cannot cover all possible conditions and
situations that may occur. It must be understood
by the operator that common sense and caution
are factors which cannot be built into this
product, but must be supplied by the operator.
2. Only use with accessories rated to handle the
forces exerted by this tool during operation.
Other accessories not designed for the forces
generated may break and forcefully launch pieces.
3. Attach all accessories properly to the tool before
connecting the air supply. A loose accessory
may detach or break during operation.
4. Obey the manual for the air compressor
used to power this tool.
5. Install an in-line shutoff valve to allow
immediate control over the air supply in an
emergency, even if a hose is ruptured.
6. Stay within air pressure capacity. Never
operate the Barrel Pump above 10 PSI.
7. This Barrel Pump is designed for use only with
nonflammable, noncorrosive liquids. This
Pump is also not designed for fuel transfer.
8. Disconnect air hose and release any built-up
air pressure. Never service the Barrel Pump or
disassemble with the air hose attached. Always
release any built-up air even after disconnecting
hose. Disconnect the Barrel Pump when not in use.
9. WARNING! TO PREVENT SERIOUS INJURY:
The warnings, cautions, and instructions discussed
in this instruction manual cannot cover all possible
conditions and situations that may occur. It must
be understood by the operator that common sense
and caution are factors which cannot be built into
this product, but must be supplied by the operator.
10. Maintain product labels and nameplates.
These carry important safety information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.
SAVE THESE INSTRUCTIONS
Specifications
Pump Capacity Approx. 12 GPM
Gauge Range 0 - 22 PSI
Suction Cup 44″ L x 1-1/4″ Diameter
Air Inlet 1/4″ NPT(F)
Reel Outlet Size 1/4″ NPT(F)
Hose Fittings 1/4″ NPT(M)
Max Pressure 10 PSI
Page 5For technical questions, please call 1-888-866-5797.Item 93755
Setup - Before Use:
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this
manual including all text under subheadings therein before set up or use of this product.
Note: For additional information regarding the parts listed in the following pages,
refer to the Assembly Diagram near the end of this manual.
Note: This air tool may be shipped with a protective plug covering the air inlet. Remove this plug before set up.
Air Supply
TO PREVENT SERIOUS INJURY FROM EXPLOSION:
Use only clean, dry, regulated, compressed air to power this tool.
Do not use oxygen, carbon dioxide, combustible gases,
or any other bottled gas as a power source for this tool.
1. Incorporate a filter, regulator with pressure gauge,
in-line shutoff valve, and quick coupler for best
service, as shown on Figure A on page 6 and
Figure B on page 7. An in-line shutoff ball
valve is an important safety device because
it controls the air supply even if the air hose
is ruptured. The shutoff valve should be a
ball valve because it can be closed quickly.
2. Attach an air hose to the compressor’s air outlet.
Connect the air hose to the air inlet of the tool.
Other components, such as a coupler plug
and quick coupler, will make operation
more efficient, but are not required.
WARNING! TO PREVENT SERIOUS INJURY
FROM ACCIDENTAL OPERATION:
Do not install a female quick coupler on the tool.
Such a coupler contains an air valve that will
allow the air tool to retain pressure and operate
accidentally after the air supply is disconnected.
Note: Air flow, and therefore tool performance,
can be hindered by undersized air supply components.
The air hose must be long enough to reach
the work area with enough extra length to
allow free movement while working.
3. Turn the tool’s throttle or switch to the off position;
refer to Operation section for description of controls.
4. Close the in-line shutoff valve between
the compressor and the tool.
5. Turn on the air compressor according to
the manufacturer’s directions and allow it
to build up pressure until it cycles off.
6. Adjust the air compressor’s output regulator
so that the air output is enough to properly
power the tool, but the output will not exceed
the tool’s maximum air pressure at any time.
Adjust the pressure gradually, while checking the
air output gauge to set the right pressure range.
7. Inspect the air connections for leaks.
Repair any leaks found.
8. If the tool will not be used at this time, turn off
and detach the air supply, safely discharge
any residual air pressure, and release
the throttle and/or turn the switch to its off
position to prevent accidental operation.
9. Residual air pressure should not be present
after the tool is disconnected from the air supply.
However, it is a good safety measure to
attempt to discharge the tool in a safe fashion
after disconnecting to ensure that the tool
is disconnected and not powered.
Page 6 For technical questions, please call 1-888-866-5797. Item 93755
SAFETY OPERATION MAINTENANCESETUP
Figure A: Portable Air Supply Setup
G
A
E
E
H
F
B
Non-lubricated
Tools
Lubricated
Tools
A
B
C
C
DA
Description Function
A Air Hose Connects air to tool
B Filter Prevents dirt and condensation from damaging tool or workpiece
C Regulator Adjusts air pressure to tool
D Lubricator (optional) For air tool lubrication
E Coupler and Plug Provides quick connection and release
F Leader Hose (optional) Increases coupler life
G Air Cleaner / Dryer (optional) Prevents water vapor from damaging workpiece
H Air Adjusting Valve (optional) For fine tuning airflow at tool
Page 7For technical questions, please call 1-888-866-5797.Item 93755
SAFETYOPERATIONMAINTENANCE SETUP
Figure B: Stationary Air Supply Setup
N
L
L O
M
C
C
Non-lubricated Tools
Lubricated
Tools
H
I
I
J
JKH
F
G
E
Slope
F
F
B
B
A
A
CD
Description Function
A Vibration Pads For noise and vibration reduction
B Anchor Bolts Secures air compressor in place
C Ball Valve Isolates sections of system for maintenance
D Isolation Hose For vibration reduction
EMain Air Line - 3/4″ minimum recommended Distributes air to branch lines
F Ball Valve To drain moisture from system
GBranch Air Line -1/2″ minimum recommended Brings air to point of use
H Air Hose Connects air to tool
I Filter Prevents dirt and condensation from damaging tool or workpiece
J Regulator Adjusts air pressure to tool
K Lubricator (optional) For air tool lubrication
L Coupler and Plug Provides quick connection and release
M Leader Hose (optional) Increases coupler life
N Air Cleaner / Dryer (optional) Prevents water vapor from damaging workpiece
O Air Adjusting Valve (optional) For fine tuning airflow at tool
Page 8 For technical questions, please call 1-888-866-5797. Item 93755
Assembly
1. Wrap about 4″ of pipe sealer tape (not included)
around the male threads located on the lower
section of the Oil Tube (5). Then firmly screw
an Oil Tube Coupler (7) onto the Oil Tube.
2. Wrap about 4″ of pipe sealer tape around the male
threads located on both the upper and lower sections
of the Oil Tube (6). Then firmly screw one end of
the Oil Tube onto the Oil Tube Coupler (7).
3. Firmly screw the remaining Oil Tube Coupler
(7) onto the lower section of the Oil Tube (6).
4. Wrap about 4″ of pipe sealer tape around the male
threads located on both the upper and lower sections
of the remaining Oil Tube (8). Then firmly screw one
end of the Oil Tube into the Oil Tube Coupler (7).
5. Insert the Oil Filter (9) into the Inlet Plug
(10). Then, firmly screw the Inlet Plug onto
the lower section of the Oil Tube (8).
INLET
PLUG (10)
OIL
FILTER (9)
OIL
TUBE (8)
OIL TUBE
COUPLER (7)
OIL TUBE
COUPLER (7) OIL
TUBE (6)
OIL
TUBE (5)
Figure C: Oil Tube Setup
6. Unscrew and remove the large bung from
the barrel of liquid to be pumped.
7. Insert the lower section of the Barrel Pump through
the bung of the barrel. Then firmly screw the
Barrel Pump into the female threads of the bung.
8. To adjust the length of the tube in the
barrel, grasp the regulator assembly and
twist it up or down on the pipe.
NOTE: The male threads of the Barrel
Pump are designed to fit a 1-1/2″ or 2″
diameter bung. (See Figure B.)
BARREL
(NOT INCLUDED)
1-1/2″ ~ 2″
DIAMETER
THREADS
AIR INLET BALL VALVE (3)
QUICK COUPLER (2)
REGULATOR (4)
PULL RING (19)
SHORT OIL
TUBE (21) PRESSURE METER (1)
Figure D: Barrel Setup
Operating Instructions
1. Make sure the Air Inlet Ball Valve
(3) is in its closed position.
2. Connect one end of an air hose to the
Quick Coupler (2) on the Barrel Pump.
3. Connect the other end of the air hose to
an air compressor. See Figure C.
REGULATOR
FILTER
Figure E: Air Compressor Setup
4. Turn on the air compressor, and set its
regulator to 10 PSI. Do not exceed10 PSI.
5. Set the Regulator (4) on the Barrel Pump to 10 PSI.
6. Turn the Air Inlet Ball Valve (3) to its open position
to pump the liquid from the Short Oil Tube (21)
of the Barrel Pump into a proper container.
NOTE: The rate of flow of the liquid being pumped
depends on its fluid viscosity. To adjust the Regulator’s
(4) PSI and therefore alter the rate of flow of the liquid,
lift up and twist the Knob on the Regulator. Then,
push in on the Knob. To increase air pressure, turn
the Knob clockwise. To decrease the air pressure, turn
the Knob counterclockwise. Do not exceed 10 PSI.
Page 9For technical questions, please call 1-888-866-5797.Item 93755
7. To stop the flow of liquid being pumped
from the barrel, turn the Air Inlet Ball
Valve (3) to its closed position.
8. When finished using the Barrel Pump, make sure the
Air Inlet Ball Valve (3) is in its closed position. Turn
off the air compressor. Hold a proper container under
the Short Oil Tube (21) and open the Air Inlet
Ball Valve again to release any compressed
air in the Barrel Pump. Turn the Regulator
(4) to its lowest setting. Turn the Air Inlet Ball
Valve to its closed position. Then, disconnect
the air hose from the Barrel Pump.
9. If necessary, unscrew and remove the Barrel Pump
from the barrel. Replace the bung on the barrel.
Wipe the Barrel Pump dry. Then, store the Pump in
a clean, dry, safe location out of reach of children.
Maintenance
Procedures not specifically explained in this manual must
be performed only by a qualified technician.
TO PREVENT SERIOUS INJURY FROM ACCIDENTAL OPERATION:
Turn off the tool, detach the air supply, safely discharge any residual air pressure
in the tool, and release the throttle and/or turn the switch to its off position before
performing any inspection, maintenance, or cleaning procedures.
TO PREVENT SERIOUS INJURY FROM TOOL FAILURE:
Do not use damaged equipment. If abnormal noise, vibration,
or leaking air occurs, have the problem corrected before further use.
Cleaning, Maintenance, and Lubrication
Note: These procedures are in addition to the regular checks and maintenance
explained as part of the regular operation of the air-operated tool.
1. BEFORE EACH USE, inspect the general
condition of the tool. Check for:
• loose hardware or housing,
• misalignment or binding of moving parts,
• cracked or broken parts, and
• any other condition that may
affect its safe operation.
2. AFTER EACH USE, clean the exterior of
the Barrel Pump, wipe with a clean, damp
cloth using a mild detergent or mild solvent.
Do not immerse the tool in liquids.
3. To clean the interior of the Barrel Pump, immerse the
lower section of the Pump into a container filled with
a mild detergent or mild solvent. Connect the Barrel
Pump to an air compressor and pump the detergent
or solvent through the Pump and into a proper waste
container until the detergent or solvent being pumped
is itself clean. When finished, disconnect the air
compressor, releasing all remaining pressure from
the Pump. Remove the Pump from the container of
detergent/solvent. Then, thoroughly dry the Pump.
Note: Always dispose of oil and other liquids
according to local waste authority guidelines.
4. When storing, always store the Barrel Pump in a
clean, dry, safe location out of reach of children.
5. CAUTION! All maintenance, service, and repairs
not mentioned in this manual must only be
performed by a qualified service technician.
Page 10 For technical questions, please call 1-888-866-5797. Item 93755
Troubleshooting
Problem Possible Causes Likely Solutions
Decreased output. 1. Not enough air pressure and/
or air flow.
2. Obstructed valve.
3. Air leaking from loose housing.
4. Mechanism contaminated.
5. Liquid is too viscous.
6. Blockage in barrel or Pump.
1. Check for loose connections and make sure that
air supply is providing enough air flow (CFM)
at required pressure (PSI) to the tool's air inlet.
Do not exceed maximum air pressure.
2. Clean around valve to ensure free movement.
3. Make sure housing is properly assembled and tight.
4. Have qualified technician
clean and lubricate mechanism. Install in-line filter
in air supply as stated in Setup: “Air Supply”.
5. Make sure Air Regulator of the Barrel
Pump is adjusted to compensate for the
viscosity of the liquid being pumped.
6. Remove Barrel Pump from the barrel,
and check the Pump for blockages in the
system and remove any obstructions.
Severe air leakage.
(Slight air leakage
is normal,
especially on
older tools.)
1. Cross-threaded housing
components.
2. Loose housing.
3. Damaged valve or housing.
4. Dirty, worn or damaged valve.
1. Check for incorrect alignment and uneven gaps.
If cross-threaded, disassemble and
replace damaged parts before use.
2. Tighten housing assembly.
If housing cannot tighten properly,
internal parts may be misaligned. Technician needs
to disassemble tool, align parts and reassemble.
3. Replace damaged components.
4. Clean or replace valve assembly.
Housing heats
during use.
Worn parts. Have qualified technician inspect internal
mechanism and replace parts as needed.
Follow all safety precautions whenever diagnosing or servicing the tool.
Disconnect air supply before service.
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY DIAGRAM
IN THIS DOCUMENT AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR DISTRIBUTOR
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 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.
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