Care And Maintenance; Changing The Saw Blade - Metabo BKH 450 Plus Original Operating Instructions

ENGLISH
9.

Care and maintenance

A
Danger!
Unplug before servicing.
– Repair and maintenance work other
than described in this section should
only be carried out by qualified spe-
cialists.
– Damaged parts, particularly safety
devices, must only be replaced with
genuine parts. Parts which have not
been tested and released by the
manufacturer can lead to unfore-
seen damage.
– Check that all safety devices are op-
erational again after each service.
9.1

Changing the saw blade

A
Danger!
Directly after cutting the saw blade
can be very hot – burn hazard! Let a
hot saw blade cool down.
Do not clean the saw blade with
combustible liquids.
Risk of injury, even with the blade at
standstill. Wear gloves when chang-
ing blades.
When fitting a saw blade, observe
the direction of rotation!
1. Lower the saw blade all the way.
2. Remove the protective cover (74)
from the chip case. To do so, carry
out the following steps:
– Turn the screw (73) anti-clock-
wise by 90°: The protective cover
(74) loosens. Pull the protective
cover to the right, then remove it
by pulling it downwards and
store.
74
73
12
A
Danger!
– Do not extend the tool for loosen-
ing the saw blade.
– Do not loosen the arbor bolt by
hitting the tool.
3. Remove the arbor bolt (75) on the
saw blade mount using the spanner
(left-hand thread!). Hold outer blade
collar (77) with open-ended spanner
to counter.
76
75
77
4. Carefully take the outer blade collar
(77) off the saw spindle. Hold the
saw blade while doing so.
5. Remove the saw blade from the saw
spindle.
6. Clean the saw blade, inner blade
collar (76) and outer blade collar
(77).
A
Danger!
Do not use any cleaning agents (e.g.
to remove resin residue) which
could attack the light metal compo-
nents; otherwise the strength of the
part could be lowered.
7. Put on a fresh saw blade (observe
direction of rotation!).
A
Danger!
Use only saw blades meeting the re-
quirements of EN 847-1 (see "Tech-
nical Specifications") – if unsuitable
or damaged saw blades parts are
used, parts can be ejected due to
centrifugal force in an explosive-
type manner.
Do not use:
– saw blades with maximum speed
ratings lower than the saw spin-
dle speed (see 'Technical Data');
– saw blades made of high-
strength steel (HSS or HS);
– Saw blades with visible damage
or deformations;
– cut-off wheel blades.
A
Danger!
– Only install saw blade with genu-
ine parts.
– Do not use any reduction rings;
otherwise the saw blade could
loosen.
– Saw blades have to be installed
in such way that they do not
wobble or run out of balance and
cannot work loose during opera-
tion.
8. Attach the outer blade collar (77)
(the two driver lugs on the outer
blade collar must extend into the two
cut-outs in the saw spindle).
A
Danger!
– Do not extend the tool for tight-
ening the arbor bolt.
– Do not tighten the arbor bolt by
hitting the wrench.
9. Screw the arbor bolt (75) on the saw
blade mount into the saw spindle
(left-hand thread!) and tighten. Hold