Makita AN250HC, Instruction Manual

9

Connecting air hose

Slip the air socket of the air hose onto the air fitting on the 
nailer. Be sure that the air socket locks firmly into position 
when installed onto the air fitting.

OPERATION

CAUTION:

• Be sure to set the change lever to the LOCK position to 

avoid unexpected misfiring when the tool is not in use.

• Make sure all safety systems are in working order 

before operation. 

(Fig. 14)

Only pulling trigger without contact element contacting 
workpiece must not bring about the tool firing. 

(Fig. 15)

Only contact element contacting workpiece without pulling 
trigger must not bring about the tool firing. 

(Fig. 16)

This nailer is only for intermittent pin-driving. Intermittent 
pin-driving is a method of pinning piece by piece with the 
following step.
1. Set the change lever to the FREE position.
2. Place the contact element against the workpiece
3. And then pull the trigger.

Pin-driving of concrete

WARNING:

• Use hardened pins only for concrete.

Using other purposed pins may cause serious injuries. 
Do not pin directly on the concrete. Failure to do so 
may cause concrete fragments to fly off or pins to strike 
back, causing serious injuries.

• When driving pins, hold the tool so that it stands upright 

to the driving surface.
Slanted pin-driving may cause concrete fragments to 
fly off or pins to strike back, causing serious injuries.

• Do not use on the surface that objects hang from, such 

as area where hangers for sewer pipe, dust pipe etc. 
are set up.

Choose and use pins so that the penetration amount into 
concrete ranges 15 mm - 20 mm. 

(Fig. 17)

CAUTION:

• Use this tool only for soft concrete built up not so long 

before. Using on the hard concrete may cause pin 
bending or pin-driving to insufficient depth.

• When the penetration amount into concrete is required 

more than 20 mm, driving pins to the sufficient length 
may not be obtained. Pins may be driven too shallow 
causing unstable workpiece, resulting in personal injury 
and damage to property.

Cutting off the sheet

CAUTION:

• Always disconnect the hose before cutting off the 

sheet. 

(Fig. 18)

Tear off the output sheet in the direction of the arrow when 
using the sheet collated pins.

MAINTENANCE

CAUTION:

• Always disconnect the air hose from the tool before 

attempting to perform inspection or maintenance.

• Never use gasoline, benzine, thinner, alcohol or the 

like. Discoloration, deformation or cracks may result.

Jammed nailer

CAUTION:

• Always disconnect the air hose and remove the pins 

from the magazine before cleaning a jam. 

(Fig. 19 & 

20)

When the nailer becomes jammed, do as follows:
Open the magazine cap and remove the pin coil. Insert a 
small rod or the like into the ejection port and tap it with a 
hammer to drive out the pin jamming from the ejection 
port. Reset the pin coil and close the magazine cap.

Drain tool (Fig. 21)

Remove the hose from the tool. Place the tool so that the 
air fitting faces down to the floor. Drain as much as 
possible.

Cleaning of tool

Blow off dust adherent to the tool by using an air duster.

Cap (Fig. 22)

When not in use, disconnect the hose. Then cap the air 
fitting with the cap.

Storage

When not in use, the nailer should be stored in a warm 
and dry place.
Maintenance of compressor, air set and air hose. 

(Fig. 23 & 24)

After operation, always drain the compressor tank and the 
air filter. If moisture is allowed to enter the tool, It may 
result in poor performance and possible tool failure.
Check regularly to see if there is sufficient pneumatic oil in 
the oiler of the air set. Failure to maintain sufficient 
lubrication will cause O-rings to wear quickly. 

(Fig. 25)

Keep the air hose away from heat (over 60°C, over 
140°F), away from chemicals (thinner, strong acids or 
alkalis). Also, route the hose away from obstacles which it 
may become dangerously caught on during operation. 
Hoses must also be directed away from sharp edges and 
areas which may lead to damage or abrasion to the hose. 

(Fig. 26)

To maintain product SAFETY and RELIABILITY, repairs, 
any other maintenance or adjustment should be 
performed by Makita Authorized Service Centers, always 
using Makita replacement parts.

OPTIONAL ACCESSORIES

CAUTION:

• These accessories or attachments are recommended 

for use with your Makita tool specified in this manual. 
The use of any other accessories or attachments might 
present a risk of injury to persons. Only use accessory 
or attachment for its stated purpose.

If you need any assistance for more details regarding 
these accessories, ask your local Makita Service Center.
• Pins
• Air hoses
• Safety goggles

NOTE:

• Some items in the list may be included in the tool 

package as standard accessories. They may differ 
from country to country.