Blade Maintenance - Stiga SBC 627 K Gebrauchsanweisung

The spark plug must be replaced with one with
the same characteristics whenever the elec-
trodes have burnt or the insulation has worn, and
in any case every 100 working hours.
5.7 LUBRICATION
IMPORTANT To preserve drive parts, we recom-
mend greasing the angle gear and flexible shaft
every 15 hours of use.
ANGLE TRANSMISSION (Fig. 21a)
Lubricate with lithium-based grease.
Remove the screw (1) and put in the grease,
turning the shaft manually until grease emerges,
then replace the screw (1).
FLEXIBLE SHAFT (Fig. 21b)
Models SBC 645 KF - 653 KF:
Lubricate with lithium-based grease.
Unhook the hose (12) from the motor side,
extract the flexible shaft (12 c) and apply grease
rotating the shaft manually until the grease is
distributed over the entire surface; then reas-
semble

5.8 BLADE MAINTENANCE

5.8.1 Sharpening the 3 or 4-point blade
(Fig. 22)
WARNING! Use protective gloves. If
sharpening is done without removing the
blade, disconnect the spark plug cap.
Sharpening must be done taking account of the
type of blade and cutting edges, using a flat file
and working all the points equally.
The references for correct sharpening are given
in Fig. 22:
A = Incorrect sharpening
B = Sharpening limits
C = Incorrect and unequal angles
IMPORTANT It is important to retain the correct
balance after sharpening. For safety reasons,
sharpening and balancing should be done by a
Specialised Centre with suitable skills and equip-
ment for the job; without risking any damage to
the blade which would make it unsafe when used.
3 or 4-point blades can be used on both sides.
When one side of the points is worn, the blade
can be turned and the other side used.
WARNING!
paired, but must be replaced as soon as
signs of breaking are noted or the sharpen-
ing limit is exceeded.
5.8.2 Sharpening the 3 or 4-point blade
Blades bearing the code indicated on the chart
on page 3 should be used on this machine.
Given product evolution, the above mentioned
blades may be replaced in time with others hav-
ing similar interchangeable and operating safety
features.
5.9 HEAD LINE REPLACEMENT
5.9.1 Cutting line head type "I" (Fig. 23)
1. Remove the remaining line pulling it out of
the centre of the starter grip (1). If it is broken
off inside, press the point indicated «PUSH»,
turn the head cover (2) anticlockwise and re-
move the line remaining inside. Close the
head again, aligning the reference notch (3)
and turn the cover (2) clockwise.
WARNING! Make sure the head is prop-
erly closed along the entire perimeter to pre-
vent it from opening during work, with the
risk of damage or injuries.
2. Cut the line to the indicated length.
3. Turn the starter grip (1) clockwise until one of
the arrows is aligned with one of the two exit
holes (4) of the line.
4. Insert the two ends of the line in the centre of
the starter grip (1), making the line exit the two
holes (4) in equal parts.
5. Turn the grip (1) clockwise to wind the line, let-
ting about 120 mm exit from both holes.
5.9.2 Cutting line head type "II" (Fig. 24)
– Follow the sequence indicated in the figure.
5.10 SHARPENING THE LINE CUTTING
KNIFE (Fig. 25)
– Remove the line cutting knife (1) from the
guard (2) by unscrewing the screws (3).
– Fix the line cutting knife in a vice and sharpen
it using a flat file, being careful to retain the
original cutting angle.
– Refit the knife on the guard.
12
The blade must never be re-