Bedienungsanleitung Hitachi NV83A2 (Seite 10 von 46) (Deutsch, Englisch, Holländisch, Französisch, Italienisch, Spanisch)

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INSPECTION AND MAINTENANCE

CAUTION:

Be sure to disconnect the hose during cleaning

jams, inspection, maintenance and cleaning.

1. Countermeasure for nail jamming

(1) Remove the nail oil roll from the magazine, open the

nail guide, insert a rod into the nail outlet and tap the

rod with a hammer. (Fig. 9)

(2) Remove the jammed nail with . screw driver. (Fig.

10)

(3) Cut off the defective part of the steel wire which links

the nails with cutting nippers, correct the deformation,

then load the nail roll in the magazine.

(4) In case of frequent jam, consult the Authorized Service

Agent from which you bought this machine.

2. Inspection and maintenance

Periodically inspect the device.

(1) Remove the four hexagon socket hd. bolts securing

the exhaust cover and remove the exhaust cover.

Then, cylinder, piston, and other parts can be removed

in respective assembly groups.

Wipe the drive bit, the piston sliding part and the body

interior with a cloth to remove deposited dirt.

(2) Confirm that the piston damper offers normal

operation. A damaged piston damper may cause

damage to other component parts.

(3) Carefully check the O-ring for wear while

disassembling. A worn or damaged O-ring may

deteriorate overall performance. Replace a worn or

damaged O-ring with new one.

(4) Prior to reassembling the device, apply grease

(Attolub No. 2 Grease) to the O-ring. Also, lubricate

the device with the recommended oil.

3. Check on mounting screws for each part

At regular intervals check every part for loose

mounting screws and whether or not there are any

air leaks. Retighten any loose screws. Operating the

equipment with loose screws untightened will incur

a hazard.

4. Inspecting the drive bit

If the top end of the drive bit is slightly rounded to an

extent that nail heads slightly float above the work

surface, or the nails are often bent, remove the drive

bit and finish off the top end with a file or grinder.

(1) Removing procedures

(a) Remove four hexagon socket hd. bolts to

disassemble the exhaust cover, whereby the

piston is exposed. (See Fig. 11)

(b) Insert an appropriate rod into the nail outlet to

withdraw the piston from the opposite side. (See

Fig. 12)

(2) Grinding procedures

(a) When grinding the top end by using a grinder, to

avoid wear, gradually grind it while cooling the

grinding part with water. Excessive grinding may

shorten the Nailer service life.

(b) If nail heads still float above the work surface even

though the top end is ground, replace the drive

bit with a new bit. (Replace the drive bit when

projection beyond the top of tail cover is reduced

to approximately 6 mm (.24”).) Drive bits are

available from the dealer where you ordered the

nailer.

(3) Reassembling procedures

Effect reassembling procedures in reverse order to

those of disassembling. Insert the drive bit with the

semicircular groove side facing the handle side.

Confirm that the drive bit is fully inserted the nail

outlet. Then reassemble the exhaust cover. Finally

apply a thin coat of grease (Attolub No. 2 Grease) to

the O-ring and interior surface of the cylinder. (See

Fig. 13)

CAUTION:

⅜ A cracked drive bit may cause damage. Prior to

reassembling the drive bit, be sure to check for such

cracks.

5. Inspecting the piston

A depletion of cylinder oil or a worn O-ring may restrict

smooth operation. In such instances remove the

piston as illustrated in Figs. 11, 12 and 13 and clean

the cylinder interior. Then apply 2cc of the

recommended oil over the cylinder interior surface. If

the piston still refuses to offer smooth operation,

replace the worn O-ring.

Also, apply a thin coat of grease (Attolub No. 2 Grease)

to the cylinder interior and the O-ring.

CAUTION:

⅜ Never clean the O-ring with gasoline, thinner, or

similar substance.

6. Inspecting the feeders

(1) Occasionally clean the knob sliding part and then

apply the recommended oil. (See Fig. 14)

(2) Open the nail guide and remove dust, etc., as shown

in Fig. 15. Apply lubricant to the sliding groove of the

feeder and feeder shaft. Check the main nail stopper

and sub nail stopper slide smoothly by pushing them

with your finger.

(3) Also, apply the recommended oil to the feeding

surface of the nose and nail guide after cleaning. This

promotes smooth operation and retards corrosion.

CAUTION:

Check for smooth movement of the feeders and

stoppers before use. If movement is uneven, nails

could be fired at an irregular angle, presenting a

hazard to the operator and others nearby.

7. Service parts list

A : Item No.

B : Code No.

C : No. Used

D : Remarks

CAUTION:

Repair, modification and inspection of Hitachi Power

Tools must be carried out by an Hitachi Authorized

Service Center.

This Parts List will be helpful if presented with the

tool to the Hitachi Authorized Service Center when

requesting repair or other maintenance.

In the operation and maintenance of power tools, the

safety regulations and standards prescribed in each

country must be observed.

MODIFICATIONS:

Hitachi Power Tools are constantly being improved

and modified to incorporate the latest technological

advancements.

Accordingly, some parts (i.e. code numbers and/or

design) may be changed without prior notice.

Hitachi NV83A2 Seite 10

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