Poulan Pro PP4218AV Manuel D'instructions page 8

Clutch
Cover
Adjusting Pin
Lower
Hole
12. Install bar nuts and finger tighten only.
Once the chain is tensioned, you will
need to tighten bar nuts.
CHAIN TENSION (Including units
with chain already installed)
WARNING:
when handling chain. The chain is sharp and
can cut you even when it is not moving.
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 chain around
guide bar. If the chain does not rotate, it is too
tight. If the chain is too loose, it will sag below
the bar.
Adjusting
Bar Nuts
Screw
Adjusting the tension:
Chain tension is very important. Chains
stretch 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.
1. Loosen bar nuts until they are finger tight
against the clutch cover.
Guide Bar
Wear protective gloves
Guide
Bar
Chain Adjustment
Tool
(Bar Tool)
2. Turn adjusting screw clockwise until chain
solidly contacts bottom of guide bar rail.
3. Using bar tool, roll chain around guide bar
to ensure all links are in bar groove.
4. Lift up tip of guide bar to check for sag.
Release tip of guide bar, then turn ad-
justing screw
until sag does not exist.
Adjusting Screw -
5. While lifting tip of guide bar, tighten bar
nuts securely with the bar tool.
6. Use the screwdriver end of the bar tool
to move chain around guide bar.
7. If chain does not rotate, it is too tight.
Slightly loosen bar nuts and loosen
chain by turning the adjusting screw
turn counterclockwise. Retighten bar
nuts.
8. If chain is too loose, it will sag below the
guide bar. DO NOT operate the saw if
the chain is loose.
NOTE:
The chain is tensioned correctly
when the weight of the chain does not cause it
to sag below the guide bar (with the chain saw
sitting in an upright position), but the chain still
moves freely around the guide bar.
WARNING:
with a loose chain, the chain could jump off the
guide bar and result in serious injury to the op-
erator and/or damage the chain making it un-
usable. If the chain jumps off the guide bar, in-
spect each drive link for damage. Damaged
chain must be repaired or replaced.
8
Adjusting
Screw
1
/ turn clockwise. Repeat
4
1
/ Turn
4
Bar Nuts
If the saw is operated
1
/
4