6
4. When you are finished operating the die
grinder, before storing it disconnect the air
hose and place 4 or 5 drops of air tool oil
into the air inlet; re-connect the air and run
the tool for a few seconds to distribute the
oil.
5. Avoid storing the grinder in very humid
locations which promotes rusting of internal
mechanisms, and always oil it before
storage.
Air Connection
1. Make sure that the air compressor supplies
clean air at the correct CFM for the die
grinder.
2. Set air pressure to 90 psi.
Excess air pressure and/or
unclean air will shorten the tool’s life and
may create a hazardous situation.
3. Drain the water from the air compressor tank
daily, as well as any condensation from the
air lines. Water in the air line may enter the
tool and cause damage.
4. Change filters on the air system on a regular
basis.
5. Air line pressure should be increased
accordingly to compensate for extra long air
hoses (usually over 25 feet). Inside diameter
of the hose should be a minimum of 3/8”.
Troubleshooting
Trouble Probable
Cause
Remedy
Die Grinder does not
operate at normal
speed; or speed
remains constant as
trigger is pressed.
Air pressure is too low.
Adjust air pressure to 90psi.
Air lines are twisted, or there is a
blockage in them.
Untwist or clean out air lines.
Air compressor is malfunctioning, or is
not sufficient capacity for the tool.
Replace air compressor.
Air regulator is malfunctioning.
Have regulator repaired or replaced at
an authorized service center.
Stops operating.
No air pressure.
Check air compressor and hoses.
Make sure compressor is set at 90psi,
and air lines are not twisted.
Trigger or throttle valve is
malfunctioning.
Have throttle valve/trigger inspected
and repaired at an authorized service
center.
Torque is diminished.
Air leakage.
Check connections at the air inlet, o-
rings, etc. Make adjustments/repairs
as needed.
Starts immediately as
soon as air is
connected without
trigger being pressed.
Throttle valve or trigger are
malfunctioning.
Inspect and repair throttle valve
and/or trigger.
Abnormal vibration
and/or excessive
heat develops in the
tool.
Improper lubrication.
Lubricate properly according to
instructions in this manual.
