Makita EH 450, EH 620 Maintenance Instructions, Blade sharpening, Blade adjustment, for a, minute

Models: EH 620 EH 450

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MAINTENANCE INSTRUCTIONS

MAINTENANCE INSTRUCTIONS

-Turn off the engine and remove the spark plug connector when replacing or sharpening cutting tools, also when cleaning the cutter or cutting

-device or carrying out any maintenance.

Never straighten or weld a damaged cutting blade.

-Inspect the cutting blades with the engine switched off at short, regular intervals for damage.

-(Detection of hairline cracks by means of tapping-noise test.) Beware the teeth are sharp.

Clean the Hedge Trimmer at regular intervals and check that all screw and nuts are well tightened.

-Never service or store the Hedge Trimmer in the vicinity of naked flames to avoid fires.

-Always wear leather gloves when handling or sharpening the blades as they are sharp.

Blade sharpening

If the edges are rounded and do not cut well any more, grind off only the shaded portions. Do not grind the contact surfaces (sliding -surfaces) of the top and bottom edges.

Before grinding, be sure to secure the blade firmly and switch off the engine and remove the spark plug cap.

- Wear gloves, protective glasses, etc.

- An edge ground too much at a time or ground many times will lose its hardened layer. It becomes rounded and dull very quickly in use.

Blade adjustment

The blades will wear with long use. When you find that trimming is not as good as when the blades were new, adjust them as follows

1.Turn nut Q loose.

2.Screw Q in with the driver lightly till it stops turning, and then screw it back one quarter to a half turn.

3. Turn nut Q tight, holding screw Q at the same time with a driver.

Holding :he dirk grinder at a

4. Lubricate the blades after adjustments above with light oil.

 

 

45'

angle. grind :he edge off

5. Start the engine and operate the engine throttle on and off

for a

to rho dotted line to sharpen

the

rounded :ip.

minute.

 

 

 

 

6.Stop the engine and touch the blades with your hand . If they are warm enough for you to keep your hand on, then you have made the proper adjustment. If they are too hot for you to keep touching, give screw .Q a little more turnback and repeat 5 to see if they are properly adjusted.

NOTE Never fail to stop the engine before maklng the adjustment.

The blades have a slot around screw Q. In case you find dust In the end of any of the slots, clean it.

QHexagonal U nut Q Trussscrew

0 Flat washer

8 Blade guide

0 Upper Blade

8 Lower blade

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Makita EH 450, EH 620 manual Maintenance Instructions, Blade sharpening, Blade adjustment, for a, minute