Preventive Mechanism For Unloaded Operation; Methods Of Operation - Hitachi NR 90AC2 Instrucciones Y Manual De Seguridad

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In order to avoid double fire or unwanted ejection
of a nail due to bouncing of the Nailer.
1) do not push Nailer on workpiece with strong
force;
2) take Nailer away from workpiece using recoil;
3) release trigger quickly when performing trigger
fire.
Do not drive nails into thin boards or near corners
and edges of workpiece. Nails can be driven
through or away from workpiece and hit someone.
Never drive nails from both sides of a wall at the
same time. Nails can be driven into and through
the wall and hit a person on the opposite side.
Never use Nailer which is defective or operating
abnormally.
Do not use Nailer as hammer.
Disconnect air hose from Nailer when:
1) it is not in use;
2) leaving work area;
3) moving it to another location; and
4) handing it to another person.
This Hitachi nailer has a STANDARD CONTACT TRIP
MECHANISM (Bounce Fire). An OPTIONAL SEQUENTIAL
TRIP MECHANISM kit (SINGLE SHOT) is available as order
part number 881973.
THE STANDARD CONTACT TRIP MECHANISM (Bounce
Fire) is for use where rapid fastener placement is desired
and must be operated in accordance with the following

"Methods of Operation".

PREVENTIVE MECHANISM FOR
UNLOADED OPERATION
The machine employs a preventive mechanism for
unloaded operation.
The machine enters a state where the push lever stopper
runs into the upper part of the push lever and the push
lever cannot be pushed up. This takes place when the
magazine is not loaded with nails or when the remaining
number of nails becomes less than 5 (This differs by the
type of nail).
Load the nails immediately if you come across with such a
condition during operation.
Push Lever Stopper
Push Lever
CAUTION
Use caution not to throw the push lever tip onto wood
and the like while the push lever stopper is in the
upper part of the push lever.
METHODS OF OPERATION
This Nailer is equipped with the push lever and does not
operate unless the push lever is depressed (upward
position).
There are two methods of operation to drive nails with
this Nailer.
They are:
1. Intermittent operation (Trigger fire):
2. Continuous operation (Push lever fire):
(1) Intermittent operation (Trigger fire)
1 Position the nail outlet on the workpiece with finger
off the trigger.
2 Depress the push lever firmly until it is completely
depressed.
3 Pull the trigger to drive a nail.
4 Remove finger from the trigger.
To drive another nail, move the Nailer along the
workpiece and repeat this procedure.
2
(2) Continuous operation (Push lever fire)
1 Pull the trigger with the Nailer off the workpiece.
2 Depress the push lever against the workpiece to
drive a nail.
3 Move the Nailer along the workpiece with a
bouncing motion.
Each depression of the push lever will drive a nail.
As soon as the desired number of nails have been
driven, remove finger from the trigger.
5
3
— 13 —
Trigger
3
Push Lever
Previously pull the trigger
1
Push Lever
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