9
ZCT838CE Rev. A (05/21)
Application
The Snap-on Cordless Impact Wrench is ideal for a wide
variety of fastener turning jobs in both the industrial and
automotive fields. When used with Snap-on impact
sockets, it provides power and speed for greater job
efficiency with less operator fatigue. The impact wrench
also adds the freedom of movement not usually available
with products requiring air hoses or electrical cords.
Operation
Friction Ring Anvil
1. When installing an impact socket, to avoid accidental
starting of the tool, remove the battery pack.
2. Align the square of the socket with four flats at the end
of the anvil.
3. Push the socket over the friction ring, until it comes to
a stop.
4. To remove the impact socket, grip the socket firmly and
slip off the anvil
This type of anvil is suitable for exchanging sockets regularly,
like in a garage environment.
Fuel Gauge
The tool is equipped with a fuel gauge to indicate the
battery’s state of charge. It is located on the left side of
the tool at the top of the handle. A round tri-color LED
changes color depending on state of charge. The gauge
is activated for three seconds at each trigger pull. The
following describes its function:
• LED IS GREEN - Battery is between 40% and 100%
charged
• LED IS YELLOW - Battery is between 25% and 40%
charged
• LED IS RED - Battery is between 0% and 25% charged
• LED IS FLASHING RED - Battery needs charging
immediately
Forward/Reverse Switch
The forward/reverse switch determines the rotating
direction of the anvil, either clockwise or
counterclockwise.
A
B
Figure 3: CT838/CTQ838
A – Release switch for forward or clockwise
rotation.
B – Depress switch for reverse or
counterclockwise rotation.
1. Be sure the impact wrench is stopped and not
operating.
2. The position of the forward/reverse switch determines
the direction of the anvil rotation. Switch positions,
when tool is positioned as above, are:
— Forward (A above), the anvil rotates clockwise,
— Reverse (B above), the anvil rotates
counterclockwise.
3. The switch must be in either the forward or the reverse
position to operate. Center position locks the switch
off.
Trigger
Depress the trigger to rotate the anvil. The lever must be
in a forward or reverse position to operate. The trigger
can be locked in the OFF position. Locking the trigger in
the OFF position helps to reduce the possibility of
accidental starting the impact wrench when not in use.
Place the lever in the center position to lock the trigger.
Lock the trigger when not in use.
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