Harbor Freight Tools 91773 Sander User Manual


 
Page 9For technical questions, please call 1-800-444-3353.SKU 91773
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.
Attach an air hose to the compressor’s 2.
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 efcient, 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 ow, and therefore tool
performance, can be hindered by
undersized air supply components.
The air hose must be long enough to 3.
reach the work area with enough extra
length to allow free movement while
working.
Turn the tool’s throttle or switch to the off 4.
position; refer to Operation section for
description of controls.
Close the in-line shutoff valve between 5.
the compressor and the tool.
Turn on the air compressor according to 6.
the manufacturer’s directions and allow it
to build up pressure until it cycles off.
Adjust the air compressor’s output 7.
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 of 90 PSI at any time. Adjust
the pressure gradually, while checking
the air output gauge to set the right
pressure range.
Inspect the air connections for leaks. 8.
Repair any leaks found.
If the tool will not be used at this time, 9.
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.
Note: 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 unpowered.
REV 10f