Specifications; Initial Tool Set Up/Assembly; Air Supply - Harbor Freight Tools CentralPneumatic 66984 Owner's Manual & Safety Instructions

3/4" heavy duty air impact wrench
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Specifications

Initial Tool Set Up/Assembly

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.

Air Supply

TO PREVENT 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, oiler, in-line shutoff valve, and quick
coupler for best service, as shown in the
air tool setup examples at the end of this
section. 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.
Note: If an automatic oiler system is not used,
add a few drops of Pneumatic Tool Oil to the
airline connection before operation. Add a
few more drops after each hour of continual
use.
Item 66984
Maximum Air Pressure
Air Inlet
Drive Size
Maximum Speed*
Average Air
Consumption
Maximum Torque
* Maximum speed at stated maximum air pressure.
Excess air pressure is hazardous and may cause the
tool to exceed stated maximum speed.
Required Air Hose: 1/2" (Not Supplied)
For technical questions, please call 1-888-866-5797.
90 PSI
3/8" -18 NPT
3/4" Square Drive
762 BPM (Blows Per
Minute)
7 CFM @ 90 PSI
1000 ft-lb
Note: For additional information regarding the
parts listed in the following pages, refer to the
Assembly Diagram near the end of this manual.
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 connector 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.
Page 6

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