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Stihl MS 440 Service Manual

Stihl MS 440
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87MS 440, MS 440 C
: Remove the pressure element
and heating element from the
handle moulding.
Before fitting a new heating
element, clean the bonding area in
the handle to remove all grease, dirt
and moisture.
VA
176RA337
Peel the backing off the new
heating element.
: Place the heating element (1) in
the handle moulding (2) and
press it into place uniformly from
the inside outwards.
VA
176RA336
1
2
The heating element must lie flat
without creasing. If it does not
adhere firmly and uniformly at all
points, heat transmission will be
interrupted and the heating element
will fail due to overheating. The
ambient temperature must be at
least +15 °C (59 °F) during
installation.
Reassemble in the reverse
sequence.
: Place a new pressure element
(cellular rubber moulding) on the
heating element, ensuring that
the entire heating element is
covered.
Plug both leads together again.
VA
176RA227
Slide the protective tubing over
the plug connections.
Install the interlock lever –
b 10.2
Check operation of the heating
element
Run the machine at full throttle for
not more than 30 seconds with the
heater switched on
The heating element in the front
handle cannot simply be replaced if
defective. The complete handle
must be replaced in this case.
Remove the carburetor –
b 12.2.1
Remove the interlock lever –
b 10.2
Take off the protective tubing
over the plug connection in the
lead from the front handle heating
element to the rear handle
heating element.
: Unplug the two leads.
VA
176RA228
: Pull the leads out of the rubber
grommet.
Pull the connecting wire out of the
heater switchb 14.2
VA
176RA229
14.4 Heating element in front
handle

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Stihl MS 440 Specifications

General IconGeneral
Displacement70.7 cc
Chain Pitch3/8"
Ignition systemElectronic
StarterRecoil starter
Vibration reductionAnti-vibration system
Weight (without bar and chain)6.4 kg
Fuel tank volume0.73 L
Oil Capacity0.36 L
Guide Bar Length40-63 cm
Guide Bar Length (recommended)40-71 cm (16-28 in)

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