Lubrication; Cold Weather Care; Testing The Nailer - Hitachi NR 90AA Instruction Manual And Safety Instructions

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5. Air consumption
Using the Air consumption table and the Air
compressor size formula, find a correct compressor size.
Air consumption table
psi
Operating pressure (bar)
(kgf/cm
ft
Air consumption
(ltr/cycle)
Air compressor size formula
Amount of air required
=number of Nailers
× average nails driven each minute per Nailer
× air consumption at given air pressure
× safety factor (always 1.2)
Example: 2 Nailers operating at 100 psi driving 30 nails
per minute
Amount of air required
=2 × 30 × .088 (2.5) × 1.2
=6.3 CFM (ft 3 /min) (180 ltr/min)
After making the calculations as shown above, you
should find a compressor providing 6.3 CFM of air that
is required.

LUBRICATION

It is important that the Nailer be properly lubricated.
Without proper lubrication, the Nailer will not work
properly and parts will wear prematurely.
Use Hitachi pneumatic tool lubricant.
Do not use detergent oil or additives. These lubricants
will harm the O-rings and other rubber parts. This will
cause the Nailer to malfunction.
Filter-regulator-lubricator units should always be used.
Keep the lubricator filled with Hitachi pneumatic tool
lubricant.
If a lubricator is not available, supply 2 – 3 drops of
Hitachi pneumatic tool lubricant into the air plug on
the Nailer twice a day.

COLD WEATHER CARE

Do not store the Nailer in a cold weather environment.
Keep the Nailer in a warm area until beginning the
work.
If the Nailer is already cold, bring it in a warm area and
allow the Nailer to warm up before use.
1 Reduce the air pressure to 64 psi (4.4 bar
4.5 kgf/cm 2 ).
2 Remove all nails from the Nailer.
3 Connect the air hose and free-fire (blank-fire) the
Nailer.
The lowered air pressure will be enough to free-fire
the Nailer.
Slow speed operation tends to warm up the
moving part.
CAUTION
Do not free-fire the Nailer at high pressure.
80 90
(5.5) (6.2)
2
) (5.6) (6.3)
3 /cycle .078 .088
(2.2) (2.5)

TESTING THE NAILER

100
(6.9)
(7)
.095
(2.7)
Always wear eye protector.
Never use Nailer unless push lever is operating
properly.
Before actually beginning the nailing work, test the Nailer
by using the checklist below. Conduct the tests in the
following order.
If abnormal operation occurs, stop using the Nailer and
contact a Hitachi authorized service center immediately.
(1) DISCONNECT AIR HOSE FROM NAILER.
REMOVE ALL NAILS FROM NAILER.
ALL SCREWS MUST BE TIGHTENED.
If any screws are loose, tighten them.
THE PUSH LEVER AND TRIGGER MUST MOVE
SMOOTHLY.
Push Lever
— 10 —
DANGER
WARNING
Trigger
Do not connect
air hose