Manual Hitachi WF4H2 (page 13 of 72) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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English

2. Installing a bit

(1) Open the screw guide.

Apply a small amount of the supplied oil to the threads

of the bit, open the vertical guide and insert the new bit

inside the muzzle. (Fig. 23)

(2) Open the vertical guide, insert the tip of the bit changing

tool in the muzzle and align it to the cross on the tip of the

bit. (Fig. 24)

(3) While pressing on the bit changing tool, turn it clockwise

and tighten the bit. (Not much force is needed to tighten

it.) (Fig. 25)

NOTE

If the bit's threads have rust on them, the next time the bit

is changed, it may be diﬃ cult to remove it from the screw

driver. When changing the bit, be absolutely sure to apply

some of the supplied oil to the threads before replacing

the bit.

USING THE STABILITY GUIDE

(OPTIONAL ACCESSORY)

CAUTION

○ When removing or mounting the stability guide, be sure

to take your ﬁ nger oﬀ the trigger and disconnect the air

hose.

○ Point the muzzle downwards and make sure it is away

from any body parts, such as hands or feet.

The stability guide (optional accessory) is attached to the

bottom of the magazine to suppress vibration of the tool's

body and to stabilize it while driving screws. When it is

not needed, it can be removed easily. (Fig. 26, 27)

INSPECTION AND MAINTENANCE

CAUTION

Always be sure to disconnect the air hose and unload all

the screws when clearing jams and during inspection and

maintenance.

1. Clearing Jams

(1) Take all of the screws out of the magazine, open the

screw guide, insert a slender rod through the muzzle and

tap on it with a hammer. (Fig. 28)

(2) Use a slotted screw driver to remove the screw(s)

jammed inside. (Fig. 29)

(3) Cut out the part of the collated sheet that is deformed with

nippers or the like and set the screws back in the screw

driver.

2. Inspecting the screw Feeder

○ Clean the moving parts of the knob occasionally and

apply some of the supplied oil. (Fig. 30)

○ Remove the cover, open the screw guide and clean oﬀ

any debris or drywall dust sticking to it. Be particularly

sure to oil the sliding parts of the feeder, namely the

groove and shaft. (Fig. 31)

○ After cleaning the screw feeding surface of the tail cover

as well, apply a thin coat of the supplied oil. Applying oil

makes the mechanisms move smoothly while preventing

rust at the same time. (Fig. 32)

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 push lever

Check if the push lever can slide smoothly (Fig. 1).

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.

5. Inspect the trigger

Periodically clean the sliding parts of the trigger, and

make sure that the trigger moves smoothly (Fig. 1).

6. Inspecting the magazine

Clean the magazine. Remove dust of gypsum board and

dust of wooden chips which may have accumulated in

the magazine.

7. Preventing dirt and dust

When not in use, put the dust cap on the air plug to

prevent any debris from getting inside the screw driver.

8. Storing

CAUTION

After work, remove all the screws from the screw driver.

NOTE

When putting the dust cap on the air plug, ﬁ rst turn the

screw driver upside down and give it time to drain any

water out completely and then put the cap on.

○ After work, put the dust cap on the air plug to keep any

dirt or dust from getting inside the screw driver and then

store it in its case.

○ If it will not be used for a long time:

• To prevent rust, oil it via the air plug and then dry ﬁ re

it two or three times to spread the oil throughout the

screw driver.

• Apply a thin coat of oil to steel parts and to valves.

• Use the supplied oil for oiling the screw driver. Avoid

mixing diﬀ erent types of oil.

○ If the temperature drops, rubber parts may shrink and

allow air to leak, so it may not perform well when starting

to use it again; therefore, store it in a warm place.

○ Store in a dry place where children cannot reach it.

9. Service parts list

A: Item No.

B: Code No.

C: No. Used

D: Remarks

CAUTION

Repair, modiﬁ cation 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 modiﬁ ed to incorporate the latest technological

advancements.

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

design) may be changed without prior notice.

01Eng_WF4H2_WE.indd 1301Eng_WF4H2_WE.indd 13 2012/04/19 8:52:422012/04/19 8:52:42

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Hitachi WF4H2 Manual

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