DeWalt D51257 Original Instructions Manual page 31

NOTE: These nailers are designed to be used
without oil. If preferred, 5–7 drops of oil may be used
on o-rings, rubber parts and can be applied to the
air fittings.
• Drain all condensation from the air compressor
tanks and hoses.
• Remove all nails from the magazine.
• Lock the nail pusher (c) in the back position.
• Check if the contact trip (g) and nail pusher (c)
can move freely.
WARNING: Do not use the tool if the
contact trip or nail pusher cannot move
freely.
WARNING: Avoid the same work
position or stance for long periods of
time, e.g., overhead. Avoid long work
periods without enough rest time.
• Check that the pressure of the air supply is
below the maximum recommended operating
pressure.
• Connect the air hose to the fitting on the tool.
• Check for audible leaks around valves and
gaskets.
• Set the air pressure to the minimum
recommended operating pressure.
WARNING: NEVER use a tool that
leaks or has damaged parts.
WARNING: DO NOT connect to air
supply unless the tool preparation is
completed.
Cold Weather Operation
When operating tools at temperatures below freezing:
• Make sure compressor tanks have been
properly drained prior to use.
• Keep the tool as warm as possible before use.
• Make certain all fasteners have been removed
from magazine.
• Disconnect the airline from the tool.
• Set the air pressure to a maximum of 5.5 bar.
• Connect the air hose to the fitting on the tool.
• Load nails into the magazine as described
below.
• Increase the air pressure to the normal
operating level.
• Use the tool in the normal manner.
• Always drain the compressor tanks at least
once daily.
NOTE: Please refer to Preparing the Tool under
Operation if choosing to use oil.
Hot Weather Operation
The tool should operate normally. Avoid the heat of
direct sunlight to avoid damage to the bumpers,
o-rings and other rubber parts.
Belt Hook (fi g. 1)
The D WALT nailers include an integrated belt hook
E
(b) that can be rotated to either side of the tool to
accommodate left- or right- handed users. It can
also be rotated out of the way when not in use.
If the hook is not desired at all, it can be removed
from the tool.
TO REMOVE BELT HOOK
1. Lock off trigger.
2. Disconnect the tool from air supply.
3. Using the appropriate hex wrench, remove the
end cap screws from the end cap (l) of the tool.
4. Remove the belt hook (b).
5. Replace end cap and gasket. Ensure that the
end cap screws are tight.
6. Replace and tighten air fitting.
Using the Lock-off (fi g. 1, 4)
WARNING: Do not keep trigger
depressed when tool is not in use.
Keep the lock-off switch rotated to the
right (OFF) when the tool is not in use.
Serious personal injury may result.
WARNING: Lock-off trigger, disconnect
airline from tool and remove fasteners
from magazine before making
adjustments. Serious personal injury
may result.
Each D WALT nailer is equipped with a trigger lock-
E
off switch (i). To engage the lock-off switch, rotate it
to the right. To disengage the lock-off switch, center
it. The trigger should always be locked off whenever
any adjustments are made or when tool is not in
use.
Actuating the Tool
WARNING: To reduce the risk of
serious personal injury, ALWAYS wear
proper eye and hearing protection when
operating this tool.
The tool can be actuated using one of two modes:
single sequential action trigger mode and bump
EN GL IS H
29