Hitachi NR90AA Lubrication, Cold Weather Care, Testing the Nailer, Air consumption

English

5. Air consumption

Using the Air consumption table and the Air compressor size formula, find a correct compressor size.

Air consumption table

	psi	80	90	100
Operating pressure (bar)		(5.5)	(6.2)	(6.9)
	(kgf/cm2)	(5.6)	(6.3)	(7)
Air consumption	ft3/cycle	.078	.088	.095
	(ltr/cycle)	(2.2)	(2.5)	(2.7)

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 (ft3/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/cm2).

2Remove all nails from the Nailer.

3Connect 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.

TESTING THE NAILER

DANGER

Always wear eye protector.

WARNING

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.

Trigger

Push Lever

Do not connect air hose

— 10 —