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Oleo-Mac BC 22 Manual De Uso Y Mantenimiento página 40

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BLADE SHARPENING (2-3-4 TOOTH)
1. Blades are reversible: when one side is no
longer sharp, the blade can be turned over
GB
and used on the other side (Fig. 17).
2. Blades are sharpened using a flat single-cut
file (Fig. 17).
3. To maintain the correct balance, file all cutting
edges uniformly.
4. If the blades are not sharpened correctly, this
can set up abnormal vibrations in the machine
and cause the blades themselves to break
ultimately.
BLADE SHARPENING (8 TOOTH)
Always check the general condition of the blade.
Correct sharpening permits the maximum
performance of the brush cutter. To sharpen the
teeth, use a file or grindstone and proceed with
light touches, respecting the corners and the
dimensions shown in Fig. 11A.
WARNING! – The wrong type of cutter or
an incorrectly sharpened blade will increase the
risk of kickback. Check mower blades for
deterioration or cracks, and replace if damaged.
WARNING: Never repair damaged
cutting
attachments
straightening or modifying the shape. This
may cause parts of the cutting tool to come
off and result in serious or fatal injuries.
NYLON LINE HEAD
Only use line of the same diameter as the original
to avoid overloading the engine (Fig. 18).
In order to get more line out of the cutting head,
tap it lightly on the ground while working.
Note: Never hit the nylon head against hard spots
such as concrete or stones, it could be dangerous.
Replacing the nylon line on the LOAD&GO
trimmer head (Fig.20)
BC 22 S – BC 22 T - BC 220 S - BC 220 T (Ø 110
mm): cut 4 m of nylon line Ø 2.4 mm.
BC 24 S – BC 24 T - BC 240 S - BC 240 T (Ø 130
mm): cut 8.5 m of nylon line Ø 2.4 mm.
1. Align the arrows and insert the line into the
trimmer head (Fig. 20.1) until it is released from
the opposite side (Fig.20.2).
34
2. Divide the line into two equal parts (Fig. 20.3)
gloves during maintenance operations. Do not
carry out maintenance with the engine hot.
AIR FILTER
Every 8-10 working hours, remove the cover (A,
Fig. 23), clean the filter (C).
BC 22 - 220: Clean with Emak degreaser p/n
001101009, rinse with water and blast dry with
compressed air.
BC 24 - 240: Clean with Emak degreaser p/n
001101009A, rinse with water and blast dry with
compressed air, not too close, blowing from the
inside outwards.
Replace if dirty or damaged. The engine runs
irregularly if the filter is clogged, with consequent
higher consumption and lower performance.
FUEL TANK
Check fuel filter periodically. A dirty filter can cause
difficult starting and lower engine performance.
To clean filter proceed as follows: remove it from
fuel filling hole. Replace it (Fig. 22) if too dirty.
by
welding,
ENGINE
Clean cylinder fins with a brush or compressed
air periodically. Dangerous overheating of engine
may occur due to impurities on the cylinder.
SPARK PLUG
Clean spark plug and check electrode distance
periodically (Fig. 24). Use Champion NGK CMR7H
or of other brand with the same thermal grade.
GEAR HOUSING
Every 30 working hours, remove screw (D, Fig. 8)
on the gear housing and check the quantity of
grease. Do not use more than 10 grams. Use high
quality molybdenum bisulfide grease.
Never use fuel for cleaning operations.
BC 240 D ATTACHMENTS COUPLING
To ensure constant and correct operation of
and then load the trimmer head by turning the
knob (Fig. 20.4).
WARNING! – Always wear protective

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