Dolmar HT-2350D Manuel D'instructions page 13

MAINTENANCE INSTRUCTIONS
- Turn off the engine and remove the spark plug connector when cleaning/replacing/sharpening the cutting blades or carrying out any
maintenance.
- Never straighten or weld a damaged cutting blade.
- Frequently inspect the cutting blades for damage with the engine switched off.
- Keep the cutting blades sharp.
- Clean the hedge trimmer and check that all screws and nuts are well tightened regularly.
- Never service 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.
Sharpening blade
If the edges are rounded and do not cut well any more, grind off only the shaded
portions in the figure. 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.
- Do not remove too much material. It lose the hardened layer and cause the
blades to get dull very quickly in use.
Adjusting blade clearance
The upper/lower blades wear. If you cannot get a clean cut though the blades are
sharp enough, adjust the clearance as follows.
1. Remove the blunt extension by loosen the screws.
2. Loosen the nut (1) with a box or open-ended wrench.
3. Tighten the truss bolt (2) with a hex wrench lightly till it stops and screw it back a
quarter turn.
4. Tighten the nut (1), holding the truss bolt (2).
5. Apply light oil on the friction surface of the blades.
6. Start the engine, operate the throttle on and off for a minute.
7. Measure the time necessary for the blades to stop after releasing the throttle. If it is two seconds or longer, stop the engine and repeat the
step 2 to 7.
8. Stop the engine and touch the blade surface. If they are not too hot to touch, you have made a proper adjustment. If they are too hot to touch,
turn the truss bolt (2) back a little and repeat the step 6 to 8.
9. Attach the blunt extension by tightening the screws.
NOTE: Before making the adjustment, stop the engine and wait for the blades to stop.
The blades have a slot around screw (2). In case you find dust in the end of any of the slots, clean it.
① Nut
② Truss bolt
③ Blade guide
④ Upper blade
⑤ Lower blade
Disk grinder
13
10° 10°
45°
Edge cross
section
Holding the disk grinder at
a 45° angle, grind the edge
off to the dotted line to
sharpen the rounded tip.