Checking Chain Tension; Adjusting The Tension - Partner Formula 400 CHROME Instruction Manual

Mount the Bar
6. Carefully remove the chain from the pack-
age. Hold chain with the drive links as
shown.
CUTTERS MUST FACE IN
DIIRECTION OF ROTATION
Cutters
Drive Links
Place chain onto the sprocket
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.
Tip of
Bar
Chain Brake Nuts

Adjusting the tension:

Chain tension is very important.
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
Depth Gauge 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.
Chain Brake Nuts
S Lift up the tip of the bar and securely tight-
en the chain brake nuts with the bar tool.
S Recheck chain tension.
WARNING
with a loose chain, the chain could jump off
the guide bar and result in serious injury.
WARNING
and after use. Do not touch the muffler or al-
low combustible material such as dry grass
or fuel to do so.
39
Chain Adjustment
Tool (Bar Tool)
Chain
Adjusting
Screw
Guide Bar
Adjusting Screw - - 1/4 Turn
Chain Brake
Nuts
: If the saw is operated
: Muffler is very hot during