Explanation Of The Nailing Action - Hitachi NR 90AD Technical Data And Service Manual

5-2. Explanation of the Nailing Action

To meet the requirements of "ANSI SNT-101-2002", the Model NR 90AD is equipped with a nailing operation
switching device at the valve portion as shown in the figures below. Use SINGLE ACTUATION MECHANISM
(SINGLE SEQUENTIAL ACTUATION MECHANISM) or CONTACT ACTUATION MECHANISM in accordance with
the work to be performed. Each nailing operation is as follows.
SINGLE ACTUATION MECHANISM (SINGLE SEQUENTIAL ACTUATION MECHANISM):
First, press the pushing lever against the wood; next, pull the trigger to drive the nail. First, pull the trigger;
next, press the pushing lever against the wood to drive the nail. After nailing once, nailing will not be possible
again until the trigger is released and pressed again.
CONTACT ACTUATION MECHANISM:
First, press the pushing lever against the wood; next, pull the trigger to drive the nail. First, pull the trigger;
next, press the pushing lever against the wood to drive the nail. If the trigger is held back, a nail will be driven
each time the pushing lever is pressed against the wood.
Nailing operation switching device
Switching device
(Change knob)
SINGLE ACTUATION
MECHANISM
(Switching device:
upward position)
CONTACT ACTUATION
MECHANISM
(Switching device:
downward position)
--- 3 ---
Switching device
(Change knob)