Scheppach MFH5200-4P Originalbetriebsanleitung Seite 57

2. Turn the chain tensioning screw (33) anti-clockwise to
loosen the chain tension. Use an installation spanner
(45).
3. Remove the chainsaw guide bar (20) and the saw
chain (21).
4. Refit the chainsaw guide bar (20) and the saw chain
(21) as described under 8.5.
Note:
Only tighten the fastening nut once the chain tension has
been set.
With a new saw chain, the tensioning force decreases af-
ter some time. Therefore, you must retension the saw
chain after the first 5 cuts, or after 10 minutes of sawing at
the latest.
12.2.3.5 Sharpening the saw chain (21) (Fig. 1)
WARNING
Increased risk of accidents due to an incor-
rectly sharpened saw chain!
Deviations from the dimensions of the cutting edge ge-
ometry during sharpening increase the risk of kickback
of the product.
– Have the saw chain sharpened by a professional.
The saw chain can be resharpened at an authorised spe-
cialist workshop. Do not attempt to sharpen the saw chain
yourself if you do not have a suitable tool and the neces-
sary experience.
CAUTION
Special tools are required to sharpen the chain; these
ensure that the cutting tools are sharpened at the cor-
rect angle and to the correct depth.
All cutting links must have the same width and length
after sharpening.
12.2.3.5.1 Instructions for sharpening the saw chain (21)
Only use files specifically for saw chains!
Other files have the wrong shape and the wrong edge. Select the diameter of the file according to your chain pitch. Be
sure to also note the following angles when sharpening the cutting links.
File diameter
Saw chain type
21PBX approx. 4.8 mm
Notes:
A sharp saw chain ensures optimum cutting performance.
It effortlessly eats through the wood, leaving behind large,
long wood chips.
A saw chain is blunt if you have to push the cutting equip-
ment through the wood and the wood chips are very
small. With a very blunt saw chain, no chips are produced
at all, only wood dust.
1. Remove the spark plug connector from the spark plug.
2. For sharpening, the saw chain (21) should be taut to
allow proper sharpening.
3. A round file with a diameter of 4.0 mm is required for
sharpening.
Other diameters damage the saw chain and can lead to
hazards when working!
4. Only sharpen from the inside out. Guide the file from
the inside of the cutting tooth to the outside.
Lift off the round file when you pull it back.
5. First sharpen the teeth on one side.
Then turn the saw chain (21) over and sharpen the
teeth on the other side.
6. The saw chain (21) is worn and must be replaced with
a new saw chain (21) when only approx. 4 mm of the
cutting tooth is left.
7. After sharpening, all cutting links must be the same
length and width.
8. After every third sharpening, the sharpening depth
(depth limit) must be checked and the height must be
re-filed using a flat file.
The depth limit should be set back from the cutting
tooth by approx. 0.65 mm. After resetting, round off
the depth limit slightly towards the front.
Top angle Bottom angle
Clamping rotation Clamping tilt angle
angle
30°
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CAUTION
Top tilt angle (55°)
Side angle
10° 85°
Standard depth
gauge
0.64 mm
GB | 57