Makita AN250HC, Instruction Manual

8

Makita Authorized Service Centers, always using 
Makita replacement parts.

SAVE THESE INSTRUCTIONS.

 WARNING:

DO NOT let comfort or familiarity with product (gained 
from repeated use) replace strict adherence to safety 
rules for the subject product. MISUSE or failure to 
follow the safety rules stated in this instruction 
manual may cause serious personal injury.

INSTALLATION

Selecting compressor (Fig. 2)

The air compressor must comply with the requirements of 
EN60335-2-34.
Select a compressor that has ample pressure and air 
output to assure cost-efficient operation. The graph shows 
the relation between pin-driving frequency, applicable 
pressure and compressor air output.
Thus, for example, if pin driving takes place at a rate of 
approximately 15 times per minute at a compression of 
1.76 MPa (17.6 bar), a compressor with an air output over 
70 liters/minute is required.
Pressure regulators must be used to limit air pressure to 
the rated pressure of the tool where air supply pressure 
exceeds the tool’s rated pressure. Failure to do so may 
result in serious injury to tool operator or persons in the 
vicinity.

Selecting air hose (Fig. 3)

Use a high pressure resistant air hose.
Use an air hose as large and as short as possible to 
assure continuous, efficient pin-driving operation. 

CAUTION:

• Low air output of the compressor, or a long or smaller 

diameter air hose in relation to the pin-driving 
frequency may cause a decrease in the driving 
capability of the tool.

Lubrication (Fig. 4)

To insure maximum performance, install an air set (oiler, 
regulator, air filter) as close as possible to the tool. Adjust 
the oiler so that one drop of oil will be provided for every 
30 pins. 

(Fig. 5)

When an air set is not used, oil the tool with pneumatic 
tool oil by placing two or three drops into the air fitting. 
This should be done before and after use. For proper 
lubrication, the tool must be fired a couple of times after 
pneumatic tool oil is introduced.

FUNCTIONAL DESCRIPTION

CAUTION:

• Always disconnect the air hose before adjusting or 

checking function on the tool.

Adjusting the pin-driving depth

CAUTION:

• Always disconnect the hose before adjusting the pin-

driving depth. 

(Fig. 6 & 7)

If pins are driven too deep, turn the adjuster clockwise. If 
pins are driven too shallow, turn the adjuster 
counterclockwise.
The adjustable range is 10 mm. (One full turn allows 
0.8 mm adjustment.)

Hook

CAUTION:

• Always disconnect the hose when hanging the tool 

using the hook.

• Never hang the tool on a waist belt or like. Dangerous 

accidental firing may result. 

(Fig. 8)

The hook is convenient for hanging the tool temporarily. 
This hook can be installed on either side of the tool.
When changing the installation position, remove the 
screw with a screwdriver. Install the hook on another side 
for installation and then secure it with the screw.
Install the hook on another side for installation and then 
secure it with the screw.

Use the nose adapter

CAUTION:

• Always disconnect the hose before installing or 

removing the nose adapter. 

(Fig. 9)

Always use the nose adapter. Otherwise a slippage may 
occur or even the nailer may not fire the nail.
Usually use one of two nose adapter A (transparent), one 
factory-installed on the contact element and the other 
stored below the grip. 
When working on narrow partition tracks, use nose one of 
two nose adapter B (black) which are provided with in the 
tool carton box.
To attach the nose adapter to the contact element, press it 
onto the contact element as far as it will go.

Locking the trigger

This nailer is provided with the mechanism for locking 
trigger to avoid personal injuries and property damage 
caused by improper operation during other than pin-
driving operation. 

(Fig. 10)

Set the change lever to the LOCK position to lock the 
trigger. 

(Fig. 11)

Before driving pins, set the change lever to the FREE 
position. When NOT driving pins, be sure to set the 
change lever to the LOCK position and disconnect the air 
hose.

ASSEMBLY

CAUTION:

• Always disconnect the air hose before loading the 

nailer.

Loading the nailer (Fig. 12)

Disconnect the air hose from the tool. Select pins suitable 
for your work. Depress the latch lever and open the door 
and magazine cap. 

(Fig. 13)

Place the pin coil in the magazine. Uncoil enough pins to 
reach the pin guide. Place the first pin in the feeder and 
the second pin in the feed claw. Place other uncoiled pins 
on feeder body. Close the magazine cap slowly until it lock 
after checking to see that the pin coil is set properly in the 
magazine.