Stihl HT 56 C Instruction Manual - Page 15

Kickback, To Avoid Kickback, A = Pull-in, To Avoid Pull-in, B = Pushback, To Avoid Pushback, - e replacement chain

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Kickback Kickback may occur when the moving saw chain near the upper quadrant of the bar nose contacts a solid object or is pinched. The reaction of the cutting force of the chain causes a rotational force on the pole pruner in the direction opposite to the chain movement. This may cause the bar to move upward. To Avoid Kickback The best protection from kickback is to avoid kickback situations: 1. Be aware of the location of the guide bar nose at all times. 2. Never let the nose of the guide bar contact any object. Do not cut limbs with the nose of the guide bar. Be especially careful near wire fences and when cutting small, tough limbs, which may easily catch the chain. 3. Cut only one limb at a time. A = Pull-in 002BA230 KN 001BA037 KN A Pull-in occurs when the chain on the bottom of the bar is suddenly stopped when it is pinched, caught or encounters a foreign object in the wood. The reaction of the chain pulls the pole pruner forward. Pull-in frequently occurs when the chain is not rotating at full speed before it contacts the wood. To Avoid Pull-in 1. Be alert to forces or situations that may cause material to pinch the chain at the bottom of the bar. 2. Always start a cut with the chain rotating at full speed. B = Pushback B Pushback occurs when the chain on the top of the bar is suddenly stopped when it is pinched, caught or encounters a foreign object in the wood. The reaction of the chain may drive the pole pruner rapidly straight back toward the 001BA038 KN English operator. Pushback frequently occurs when the top of the bar is used for cutting. To Avoid Pushback 1. Be alert to forces or situations that may cause material to pinch the chain at the top of the bar. 2. Do not cut more than one limb at a time. 3. Do not twist the bar when withdrawing it from an underbuck cut because the chain can pinch. MAINTENANCE, REPAIR AND STORING Maintenance, replacement, or repair of the emission control devices and systems may be performed by any nonroad engine repair establishment or individual. However, if you make a warranty claim for a component which has not been serviced or maintained properly, STIHL may deny coverage. WARNING STIHL recommends the use of STIHL replacement parts for maintenance and repair. Use of parts manufactured by others may be extremely dangerous and could result in serious or fatal injury. Strictly follow the maintenance and repair instructions in the appropriate sections of this instruction manual. Please refer to the maintenance chart in this manual. HT 56 C 13

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HT 56 C
English
13
Kickback
Kickback may occur when the moving
saw chain near the upper quadrant of
the bar nose contacts a solid object or is
pinched.
The reaction of the cutting force of the
chain causes a rotational force on the
pole pruner in the direction opposite to
the chain movement. This may cause
the bar to move upward.
To Avoid Kickback
The best protection from kickback is to
avoid kickback situations:
1.
Be aware of the location of the guide
bar nose at all times.
2.
Never let the nose of the guide bar
contact any object. Do not cut limbs
with the nose of the guide bar. Be
especially careful near wire fences
and when cutting small, tough
limbs, which may easily catch the
chain.
3.
Cut only one limb at a time.
A = Pull-in
Pull-in occurs when the chain on the
bottom of the bar is suddenly stopped
when it is pinched, caught or encounters
a foreign object in the wood. The
reaction of the chain pulls the pole
pruner forward.
Pull-in frequently occurs when the chain
is not rotating at full speed before it
contacts the wood.
To Avoid Pull-in
1.
Be alert to forces or situations that
may cause material to pinch the
chain at the bottom of the bar.
2.
Always start a cut with the chain
rotating at full speed.
B = Pushback
Pushback occurs when the chain on the
top of the bar is suddenly stopped when
it is pinched, caught or encounters a
foreign object in the wood. The reaction
of the chain may drive the pole pruner
rapidly straight back toward the
operator. Pushback frequently occurs
when the top of the bar is used for
cutting.
To Avoid Pushback
1.
Be alert to forces or situations that
may cause material to pinch the
chain at the top of the bar.
2.
Do not cut more than one limb at a
time.
3.
Do not twist the bar when
withdrawing it from an underbuck
cut because the chain can pinch.
MAINTENANCE, REPAIR AND
STORING
Maintenance, replacement, or repair of
the emission control devices and
systems may be performed by any
nonroad engine repair establishment or
individual. However, if you make a
warranty claim for a component which
has not been serviced or maintained
properly, STIHL may deny coverage.
WARNING
STIHL recommends the use of STIHL
replacement parts for maintenance and
repair. Use of parts manufactured by
others may be extremely dangerous and
could result in serious or fatal injury.
Strictly follow the maintenance and
repair instructions in the appropriate
sections of this instruction manual.
Please refer to the maintenance chart in
this manual.
002BA230 KN
001BA037 KN
A
001BA038 KN
B