Husqvarna 235E Operator's Manual page 11

GENERAL SAFETY PRECAUTIONS
General rules
• Only
use cutting
equipment recommended by us!
See instructions under the heading Technical data.
• Keep the chain's cutting teeth properly sharpened!
Follow our instructions and use the recommended
file gauge. A damaged or badly sharpened chain
increases the risk of accidents.
• Maintain the correct depth gauge setting! Follow
our instructions and use the recommended depth
gauge clearance. Too large a clearance increases the
risk of kickback.
• Keep the chain properly tensioned! If the chain is
slack it is more likely to jump off and lead to increased
wear on the bar, chain and drive sprocket.
• Keep cutting equipment well lubricated and
properly maintained! A poorly lubricated chain is
more likely to break and lead to increased wear on the
bar, chain and drive sprocket.
Cutting equipment designed to reduce
kickback
WARN!NG! Faulty Cutting equipment or I
J f _, the Wrong combination of bar and saw |
| chain increases therisk of kickback! |
On!y use the bar/saw chain combin- |
ations we recommend, and fo!low th e |
filing instructions. See instructions |
und_ading Technical data.
The only way to avoid kickback is to make sure that the
kickback zone of the bar never touches anything.
By using cutting equipment with "built-in" kickback
reduction and keeping the chain sharp and well-
maintained you can reduce the effects of kickback.
Bar
The smaller the tip radius the lower the chance of kickback.
Chain
A chain is made up of a number of links, which are
available in standard and low-kickback versions.
! I_sign eliminates the
danger of kickback.
ctw,t, arotat!ng ]
| / v\ sawchain c an caose o,tremo_y Se.o.s I
injuries.
Some terms that describe the bar and chain
To maintain the safety features of the cutting equipment,
you should replace a worn or damaged bar or chain with a
bar and chain combinations recommended by Husqvarna.
See instructions under the heading Technical Data for a list
of replacement bar and chain combinations we
recommend.
Bar
• Length (inches/cm)
• Number of teeth on bar tip sprocket (T).
• Chain pitch (inches). The spacing between the drive
links of the chain must match the spacing of the teeth on
the bar tip sprocket and drive sprocket.
° Number of drive links. The number of drive links is
determined by the length of the bar, the chain pitch and
the number of teeth on the bar tip sprocket.
* Bar groove width (inches/mm). The groove in the bar
must match the width of the chain drive links.
* Chain oil hole and hole for chain tensioner.The bar must
be matched to the chain saw design.
Chain
* Chain pitch (inches)
* Drive link width (mm/inches)
* Number of drive links.
Sharpening your chain and adjusting
depth gauge setting
II/!\ w_ing w_th t ,echain, inorder to II
protect your hands from injury.
General information on sharpening cutting teeth
° Never use a blunt chain. When the chain is blunt you
have to exert more pressure to force the bar through the
wood and the chips will be very small. If the chain is very
blunt it will produce wood powder and no chips or
shavings.
° A sharp chain eats its way through the wood and
produces long, thick chips or shavings.
° The cutting part of the chain is called the cutter and
consists of a cutting tooth (A) and the depth gauge (B).
The cutters cutting depth is determined by the
difference in height between the two (depth gauge
setting). (7)
When you sharpen a cutting tooth there are four important
factors to remember.
1 Filing angle
2 Cutting angle
3 File position
4 Round file diameter
It is very difficult to sharpen a chain correctly without the
right equipment. We recommend that you use our file
gauge. This will help you obtain the maximum kickback
reduction and cutting performance from your chain.
See instructions under the heading Technical data for
information about sharpening your chain.
_eparture
from ,I.e
| / =Y ' %, sharpening instructions considerably
increases the risk of kickback.
Sharpening cutting teeth
To sharpen cutting teeth you will need a round file and a file
gauge. See instructions under the heading Technical data
for information on the size of file and gauge that are
recommended for the chain fitted to your chain saw.
° Check that the chain is correctly tensioned. A slack
chain will move sideways, making it more difficult to
sharpen correctly.
° Always file cutting teeth from the inside face. Reduce
the pressure on the return stroke. File all the teeth on
one side first, then turn the chain saw and file the teeth
on the other side.
5451546-92 Rev.3 2007-12-19 English - 11