Manual Hitachi NV90AG (page 11 of 48) (English, German, Dutch, French, Italian, Spanish)

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⅜ Adjusting the adjuster (Fig. 12)

Carry out test driving. If the nails are too deep, turn

the adjuster to the shallow side (

mark).

If the nail depth is too shallow, turn the adjuster to

the deep side ( mark) (See Fig. 12, 13).

Depth is changed 1 mm with each rotation of the

adjuster.

NOTES

⅜ When adjusting the adjuster, it does not rotate more

than 3 mm from the deepest point where a nail goes

down. Do not rotate the adjuster by force beyond

that point.

⅜ The nail-driving depth can also be adjusted by

changing the air pressure used. Carry this out together

with movement of the adjuster. Using a high air

pressure that does not match the nail-driving

resistance will shorten the life of this nailer.

3. How to use nosecap

CAUTION

Remove the hose from the nailer and release the

compressed air before installing or removing the

nosecap to prevent accidental nail ejection.

⅜ Attach the nose cap on the tip of the push lever when

you wish to protect the surface of wood, etc., from

scratches.

(1) Attaching and detaching nose cap

The nose cap can be attached by simply pressing it

into the push lever.

Press it in until a convex part inside the nose cap

enters into a hole of the push lever (Fig. 14).

For removal, insert a thin rod such as a screw driver

into the gap on the back of the push lever, and then

pull it out.

(2) Safekeeping of nose cap

Put the removed nose cap in a space behind the

magazine for safekeeping (Fig. 15).

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 roll from the magazine, open the

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

with a hammer (Fig. 16).

(2) Remove the jammed nail with slotted screwdriver

(Fig. 17).

(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 jams, consult the Authorized

Service Center from which you bought this machine.

2. 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.

3. Inspecting the push lever

Check if the push lever can slide smoothly (Fig. 18).

Clean up the sliding area of the push lever and use the

provided oil for lubrication from time to time.

Lubrication enables smooth sliding and simultaneously

serves to prevent the formation of rust.

4. Inspecting the feeders

(1) Occasionally clean the knob sliding part and then

apply the recommended oil (See Fig. 19).

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

in Fig. 20. Apply lubricant to the sliding groove of the

feeder and shaft. Check the nail stopper (A) and nail

stopper (B) 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.

5. Inspecting the magazine

Clean the magazine. Remove dust of wooden chips

which may have accumulated in the magazine.

6. Storing

⅜ When not in use for an extended period, apply a thin

coat of the lubricant to the steel parts to avoid rust.

⅜ Do not store the Nailer in a cold weather environment.

Keep the Nailer in a warm area.

⅜ When not in use, the Nailer should be stored in a

warm and dry place.

Keep out of reach of children.

7. Service parts list

CAUTION

Repair, modification and inspection of Hitachi Power

Tools must be carried out by a 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 may be changed without

prior notice.

COMPRESSOR

CAUTION

When the maximum, operating pressure of the air

compressor exceeds 8.3 bar (120 psi.), be sure to

provide a reducing valve between the air compressor

and nailer. Then, adjust the air pressure within the

operating range of 4.9 – 8.3 bar (70 – 120 psi.). If the

air set is installed, lubrication is also possible, thus

providing additional convenience.

OILER-FILTER-REDUCING VALVE (Air Set)

So that the equipment can be operated under an optimum

condition to ensure extended service life, it is advisable

to use an oiler filter reducing valve. Please limit the

length of the hose between the unit and the air set to

within 10m when using (Fig. 21).

01Eng_NV90AG_WE.p65 1/31/13, 14:3111

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Hitachi NV90AG Manual

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