Maintenance - Husqvarna 137 Instruction Manual

• Keep the tree between you and the chain.
Cut from the side of the tree opposite the
branch you are cutting.
• Remove larger, supporting branches with
the cutting techniques described in BUCK-
ING WITHOUT A SUPPORT.
• Always use an overcut to cut small and
freely hanging limbs. Undercutting could
cause _imbs to fali and pinch the saw.
PRUNING
_WARNING:
Limit pruning to limbs
shoulder height or below. Do not cut if
branches are higher than your shoulder. Get
a professional to do the job.
• Make your fist cut I/3 of the way through
the bottom of the limb.
• Next make a 2nd cut all the way
through the limb. Then cut a third over-
cut leaving a 1 to 2 inch cellar from the
trunk of the tree.
l i _'i Secon¢c_u_
ThirdaiUt .,_'_
_l C°_/Ir#_1"" Firsteut
_1 [ Pruning technique
z't
ABkWARNING:
Muffler is very hot dur-
ing and after use. Do net touch the muffler or
allow combustible material such as dry
grass or fuel to do so.
We recommend all service and adjustments
not listed in this manual be performed by an
authorized Husqvarna Service Dealer.
MAINTENANCE SCHEDULE
Check:
FueI mixture level .... Before each use
Bar lubrication ....... Before each use
Chain tension ....... Before each use
Chain sharpness .... Before each use
For damaged parts .. Before each use
For loose caps ...... Before each use
For loose fasteners... Before each use
For loose parts ...... Before each use
Muffler ............. Every 25 hours*
Inspect and Clean:
Bar ................ Before each use
Complete saw ....... After each use
Air filter ............. Every 5 hours*
Chain brake ........ Every 5 hours*
Replace spark plug . Yearly
Replace fuel filter... Yearly
* Hours of Operation
AIR FILTER
CAUTION: Do not clean filter in gasoline or
other flammable soivent to avoid creating a
fire hazard or producing harmful evaporative
emissions.
Cleaning the air filter:
A dirty air filter decreases engine perform-
ance and increases fuel consumption and
harmful emissions. Always clean after 15
tanks of fuel or 5 hours of operation, which-
ever comes first. Clean more frequently in
dusty conditions. A used air filter can never
be completely cleaned. It is advisable to re-
place your air filter with a new one after every
50 hours of operation, or annually, whichever
comes first.
1. Loosen 3 screws on cylinder cover.
2. Remove cylinder cover.
3. Remove air filter.
4. Clean the air filter using hot soapy water.
Rinse with clean cool water. Air dry com-
pletely before reinstalling.
5. Reinstall air filter.
6. Reinstall cylinder cover and 3 screws.
Tighten securely.
_i_ Air Filter
' _--_ _" _ Air Filter
_'=_]*'_J" "_" Screws
MUFFLER AND SPARK ARREST-
ING SCREEN
A_, WARNING:
The muffler on this prod-
uct contains chemicals known to the State of
California to cause cancer.
NOTE: THE SPARK ARRESTING
SCREEN ON THIS UNIT IS NOT SERVI-
CEABLE.
For normal homeowner use, the muffler and
spark arresting screen will not require re-
placement. After 75 hours of use, we recom-
mend that your muffler be replaced by your
authorized Husqvarna service dealer.
CARBURETOR ADJUSTMENTS
The chain will be moving during most of this
procedure. Wear your protective equipment
and observe all safety precautions. The
chain must not move at idle speed.
The carburetor has been carefully set at the
factory. Adjustments may be necessary if
you notice any of the following conditions:
• Chain moves at idle. See iDLE SPEED-T
adjusting procedure.
• Saw will not idle. See IDLE SPEED-T ad-
justing procedure.
Idle Speed-T
Allow engine to idle. If the chain moves, idle
is too fast. If the engine stalls, idle is too slow.
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