Husqvarna 137 Instruction Manual page 8

Above _a c adena en e_ enaranaie
8. Fit b ottom o fdrive l inks b etween the
teeth i nthe sprocket inthe nose ofthe
guide bar.
9. Fit c hain drive links i nto b ar groove.
10. Pull guide bar forward until chain issnug
in guide bar groove. Ensure all drive links
are inthe bar groove.
11. Now, install chain brake making sure t he
adjusting pin ispositioned inthe lower
hole i n the guide bar. Remember this p in
moves the bar forward and b ackward as
the screw i sturned.
12. Install chain brake nuts and f inger tighten
only. Once the chain i stensioned, you
will need totighten chain brake nuts.
CHAIN TENSION
(including units with chain already installed)
NOTE: When adjusting chain tension,
make sure the chain brake nuts are finger
tight only. Attempting to tension the chain
when the chain brake nuts are tight can
cause damage.
Checking the tension:
Use the screwdriver end of the bar tool to
move the chain around the bar. If the chain
does not rotate, it is too tight. If too loose, the
chain will sag betow the bar.
Guide
_ Bar
/ Chain Adjustment
Chain Brake Nuts Tool (Bar Tool)
Adjusting the tension:
Chah_ tension is very important. Chain
stretches during use. This is especially true
during the first few times you use your saw.
Always check chain tension each time you
use and refuel your saw.
You can adjust the chain tension by loosen-
ing the chain brake nuts and turning the ad-
justing screw t/4 of a turn while lifting up on
the bar.
• If chain is too tight, turn adjusflng screw 1/4
turn counterclockwise.
• If chain is too loose, turn adjusting screw
1/4 turn clockwise.
..-z:_.Lz Adjusting / //
Chain Brake Nuts Guide Bar
Adjusting Screw - 1/4 Turn
• Lift up the tip of the bar and tighten the
chain brake nuts with the combination
screwdriver/wrench.
• Recheck chain tension.
._._e.Z.L . Chain Brake A _"
_ _ Nuts
£A
,_WARNING:
If the saw is operated
with a Ioose chain, the chain could jump off
the guide bar and result in serious injury.
FUELING ENGINE
_, WARNIN G:
Remove fuel cap slowly
when refueling.
This engine is certified to operate on unleaded
gasoline. Before operation, gasoline should be
mixed with a good quality synthetic 2-cycle
air-cooled engine oil designed to be mixed at a
ratio of 40:1, (A 40:1 ratio is obtained by mixing
3.2 ounces of oil with 1 gaflon of unleaded
gasoline). DO NOT USE automotive or boat
oil. These oils will cause engine damage.
When mixing fuel follow the instructions printed
on the container, Always read and follow the
safety rules listed under HANDLE FUELWITH
CAUTION,
BAR AND CHAIN LUBRICATION
The bar and chain require continuous lubri-
cation. Lubrication is provided by the auto-
matic oiler system when the oil tank is kept
filled. Lack of oil will quickly ruin the bar and
chain. Too little oii will cause overheating
shown by smoke coming from the chain and/
or discoloration of the bar. In freezing weather
oil will thicken, making it necessary to thin bar
and chain oil with a small amount (5 to 10%) of
#1 Diesel Fuel or kerosene.
Bar and chain oil must be free flowing for the oil
system to pump enough oil for adequate lu-
brication.
Genuine Husqvama® bar and chain oil is rec-
ommended to protect your unit against exces-
sive wear from heat and friction. Husqvama®
oil resists high temperature thinning.
if Husqvarna® bar oil is not available, use a
good grade SAE 30 oil.
• Never use waste oil for bar and chain lu-
brication.
• Always stop the engine before removing
the oil cap.