Chain Tension - Poulan Pro SM4218 AV Instruction Manual

Tip of
Bar
;UTTERS MUST FACE IN
DIIRECTION OF ROTATION
Cutters Depth Gauge
Drive Links
6. Place chain over and behind the clutch
retainer, fitting t hedrive l inks i nthe
clutch drum s procket.
7. Fit b ottom o fdrive l inks b etween the
teeth i nthe sprocket inthe nose ofthe
guide bar.
8. Fit c hain drive links i nto b ar g roove.
9. Pull guide bar forward until chain issnug
inguide bar g roove. Ensure alldrive
links are inthe bar groove.
10. H old g uide bar a gainst the saw frame
and install clutch cover.
11. I nstall bar n uts a nd f inger tighten only.
Once the chain i stensioned, you will
need totighten bar nuts.
CHAIN T ENSION
(including units with c hain already installed)
WARNING:
Wear protective gloves
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 bar nuts are finger tight only.
Attempting to tension the chain when the bar
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. Ifthe chain is too loose, it will sag below
the bar.
Guide
Bar
Adjusting the tension:
Chain tension is very h_qportant. 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.
An adjusting screw (located on the guide
bar) is used to adjust the tension of the chain
(see illustration).
1. Turn adjusting screw clockwise until chain
solidly contacts bottom of guide bar rail
Guide bar
Adjusting
Screw
2. Using bar tool. roll chain around guide bar
to ensure all links are in bar groove.
3. Lift up tip of guide bar to check for sag.
Release tip of guide bar. then turn ad-
justing screw clockwise until sag does
not exist.
4. While lifting tip of guide bar, tighten bar
nuts securely with the bar tool.
5. Use the screwdriver end of the bar tool
to move chain around guide bar.
6. If chain does not rotate, it is too tight.
Slightly loosen bar nuts and loosen
chain by turning the adjusting screw.
Retighten bar nuts.
7. If chain is too loose, it will sag below the
guide bar. DO NOT operate the saw if
the chain is loose.
WARNING:
If the saw is operated
with a Ioose chain, the chain could jump off
the guide bar and result in serious injury.
Bar Nuts
Chain Adjustment
Tool
(Bar Tool)