Jonsered CS 2138 - Manual (Page 7)

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7. Place chain over and behind clutch, fitting
the drive links in the clutch drum sprocket.
8. Fit bottom of drive links between the
teeth in the sprocket in the nose of the
guide bar.
9. Fit chain drive links into bar groove.
10. Pull guide bar forward until chain is snug
in guide bar groove. Ensure all drive
links are in the bar groove.
11. Now, install chain brake making sure the
adjusting pin is positioned in the lower
hole in the guide bar. Remember this pin
moves the bar forward and backward as
the screw is turned.
12. Install chain brake nuts and finger tighten
only. Once the chain is tensioned, you
will need to tighten 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 chain adjust-
ment tool (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 below the
bar.
Chain Brake Nuts
Chain Adjustment
Tool (Bar Tool)
Adjusting the tension:
Chain 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 loosening the chain brake
nuts and turning the adjusting screw 1/4 of a
turn while lifting up on the bar.
S
If chain is too tight, turn adjusting screw 1/4
turn counterclockwise.
S If chain is too loose, turn adjusting screw
1/4 turn clockwise.
Adjusting
Screw
Chain Brake Nuts
Guide Bar
Adjusting Screw -- 1/4 Turn
S Lift up the tip of the bar and securely tight-
en the chain brake nuts with the bar tool.
S Recheck chain tension.
Chain Brake
Nuts
WARNING
: If the saw is operated
with a loose chain, the chain could jump off
the guide bar and result in serious injury.
WARNING
: Muffler is very hot during
and after use. Do not touch the muffler or al-
low combustible material such as dry grass
or fuel to do so.
OPERATING YOUR UNIT
BEFORE STARTING ENGINE
WARNING : Be sure to read the fuel
information in the safety rules before you be-
gin. If you do not understand the safety rules,
do not attempt to fuel your unit. Contact an
authorized service dealer.
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 oil will cause overheating
shown by smoke coming from the chain and/
or discoloration of the bar.
Only use Bar and Chain Oil for bar and chain
lubrication.
Oil Cap Fuel mix cap
FUELING ENGINE
WARNING
: Remove fuel cap slowly
when refueling.
This engine is certified to operate on unleaded
gasoline. Before operation, gasoline must be
mixed with a good quality 2-cycle air-cooled
engine oil designed to be mixed at a ratio of
40:1. A 40:1 ratio is obtained by mixing 0,125
liter of oil with 5 liters 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 relating
to fuel before fueling your unit.