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8 1/2-Inch Reversible Drill Operator's Manual
Maintenance
LUBRICATION:
An automatic in-line filter-regulator-lubricator is recommended as it increases tool life
and keeps the tool in sustained operation. The in-line lubricator should be regularly
checked and filled with John Deere AT-4003 air tool oil. Proper adjustment of the in-line
lubricator is performed by placing a sheet of paper next to the exhaust ports and
holding the throttle open approximately 30 seconds. The lubricator is properly set when
a light stain of oil collects on the paper. Excessive amounts of oil should be avoided.
In the event that it becomes necessary to store the tool for an extended period of time
(overnight, weekend, etc.), it should receive a generous amount of lubrication at that
time. The tool should be run for approximately 30 seconds to ensure oil has been
evenly distributed throughout the tool. The tool should be stored in a clean and dry
environment.
Recommended lubricants: Use John Deere AT-4003 air tool oil or any other high
grade turbine oil containing moisture absorbent, rust inhibitors, metal wetting agents
and an EP (extreme pressure) additive.
Operation
PRE-OPERATION:
Before the tool is connected to the air supply, clear the air hose of accumulated dust
and moisture. Before removing a tool for service or changing accessories, make sure
the air line is shut-off and drained of air. This will prevent the tool from operating if the
throttle is accidentally engaged.
OPERATION:
The reverse lever is located on the left side of the pistol grip handle. It is labeled as
“F” for forward (tightening or drilling) and “R” for reverse (loosening or removing). Do
not change direction while tool is running.
Locate center of new hole by using a center punch. Place drill bit tip in punch mark.
Hold drill square with work and start motor. Apply steady, even pressure. Do not
force. Too much pressure can cause bit to break or overheat. Too little pressure will
keep bit from cutting and cause it to overheat.
Reduce pressure just before bit cuts through the work. When bit has penetrated work
and is spinning freely, take it from the work while the motor is running, then release
throttle.
CAUTION: IF THE DRILL JAMS IN THE WORK,
RELEASE THROTTLE IMMEDIATELY.
DISCONNECT THE DRILL BEFORE
REMOVING BIT AND DETERMINE CAUSE
OF TROUBLE. DO NOT ATTEMPT TO
FREE THE BIT BY STARTING AND
STOPPING THE MOTOR.