Husqvarna 455e-series Rancher TrioBrake, Operator'S Manual

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MAINTENANCE
26 – English 1153598-26 Rev.1 2010-08-25
To adjust the carburettor correctly you should contact a
mechanic with access to a rev counter.
CAUTION! As the spark is cut off, the rev counter does not
show speeds higher than 13600 rpm.
Correctly adjusted carburettor
When the carburettor is correctly adjusted the machine
accelerates without hesitation and 4-cycles a little at full
throttle. It is also important that the chain does not rotate
at idle. If the L-jet is set too lean it may cause starting
difficulties and poor acceleration. If the H-jet is set too
lean the machine will have less power, poor acceleration
and could suffer damage to the engine.
Checking, maintaining and
servicing chain saw safety
equipment
Chain brake and front hand guard
Checking brake band wear
Brush off any wood dust, resin and dirt from the chain
brake and clutch drum. Dirt and wear can impair operation
of the brake. (91)
Regularly check that the brake band is at least 0.6 mm
thick at its thinnest point.
Checking the front hand guard
Make sure the front hand guard is not damaged and that
there are no visible defects such as cracks.
Move the front hand guard forwards and back to make
sure it moves freely and that it is securely anchored to the
clutch cover.
Checking the inertia brake release
Place the chain saw, with the engine switched off, on a
stump or other stable surface. Release the front handle
and let the saw fall by its own weight, rotating around the
rear handle towards the stump. (92)
When the bar hits the stump the brake should be
applied. (93)
Checking the right-hand brake trigger
Check that the right hand guard is not damaged and that
there are no visible defects, such as cracks. (27)
Push the trigger up and forwards to check that it moves
freely and is securely hinged to the clutch cover. (28)
Never carry or hang the saw by the trigger! This could
damage the mechanism and disable the chain brake.
(29)
Checking the brake trigger
Place the chain saw on firm ground and start it. Make sure
the chain does not touch the ground or any other object.
See the instructions under the heading Start and stop.
Grasp the chain saw firmly, wrapping your fingers and
thumbs around the handles. (56)
Apply full throttle and activate the chain brake by tilting
your left wrist forward onto the front hand guard. Do not let
go of the front handle. The chain should stop
immediately. (51)
Throttle lockout
• Make sure the throttle control is locked at the idle
setting when the throttle lockout is released. (94)
• Press the throttle lockout and make sure it returns to
its original position when you release it. (95)
• Check that the throttle control and throttle lockout
move freely and that the return springs work properly.
(96)
• Start the chain saw and apply full throttle. Release the
throttle control and check that the chain stops and
remains stationary. If the chain rotates when the
throttle control is in the idle position you should check
the carburettor idle adjustment.
Chain catcher
Check that the chain catcher is not damaged and is firmly
attached to the body of the chain saw. (10)
Right hand guard
Check that the right hand guard is not damaged and that
there are no visible defects, such as cracks. (11)
Note! All service and repair work on the machine
demands special training. This is especially true of the
machine’s safety equipment. If your machine fails any of
the checks described below we recommend that you
take it to your service workshop.