Poulan 425 - Manual (Page 8)

D. CHAIN TENSION
• Chain Tension is very important—
— A loose chain will wear the bar and itself.
— A loose chain can jump off bar during cutting.
~ A tight chain can break or damage the saw and/
or bar.
• The chain stretches during use, especially
when new. Check tension periodically as follows;
— each time the saw is used;
— more frequently when the chain is new;
— as the chain warms up to normal operating
temperature.
• Chain tension is correct when the chain can
be lifted about 1/8” from the Guide Bar at a point
near the middle of the bar and will move freely
around the bar.
Chain tensioning procedure:
CAUTION; I Always wear gloves when handl­
ing the chain. The chain is sharp and can
cut you even when it is not moving!
1 . Lift up the tip of the guide bar and turn the adjust­
ing screw clockwise until the chain does not sag
beneath the guide bar. Figure 9 .
Check the tension by lifting the chain from the
guide bar at the center of the bar. Figure 10 .
Continue adjusting the adjusting screw until the
tension is correct.
Tighten the bar clamp nuts ydth the bar wrench.
Recheck chain tension.
Figure 10
E. BAR AND CHAIN OIL
• The guide bar and cutting chain require
continuous lubrication to remain in operat­
ing condition. Lubrication is provided by the
automatic oiler system when oil tank is kept filled.
- Lack of oil will quickly ruin bar and chain.
-
Too little oil will cause overheating, result­
ing in smoke coming from the chain and/or dis­
coloration of the guide bar rails.
• Genuine POUIAN/POULAN PRO Bar and
Chain Oil is recommended to protect your
unit against excessive wear from heat and
friction, POULAN/POUIAN PRO oil resists
high
temperature thinning. If POULAN/
POULAN PRO Bar and Chain Oil is not available,
use a good grade SAE 30 oil. Never use waste oil
for bar and chain lubrication.
• In freezing weather oil will thicken, making
it necessary to thin bar and chain oil with a
small amount of Diesel Fuel #1 or kerosene.
Bar ^d chain oil must be fi-ee flowing for oil sys­
tem to pump enough oil for adequate lubrication.
USE THE FOLLOWING:
30° or above — 100% lubricant - undiluted.
30°-0°F - 95% lubricant to 5% Diesel Fuel #1 or
kerosene
Below 0°F — 90% lubricant to 10% Diesel Fuel #1
or kerosene.
1 .
2 . HOW TO FILL THE OIL TANK
a. Stop the engine.
b. Turn saw on its side, oil cap up. Figure 11.
c. Loosen cap slowly and wait for pressure in the
tank to be released before removing the cap.
d. Fill the oil tank. Figure 12 .
e. Replace the oil cap securely.
3. IMPORTANT POINTS TO REMEMBER
Fill oil tank each time you fill fuel tank to
ensure that there will be sufficient o0 for the
chain whenever you start and run the saw.
The saw will normally use about one tank
of chain oil for each tank of fuel mixture.
If less oil is used, check for a plugged oil hole in
the guide bar.
Keep sawdust and debris cleaned from
the oil holes in the guide bar to allow an ad­
equate oil flow to the bar and chain.
Keep spilled and spattered oil wiped
from the unit to avoid sawdust and de­
bris build-up. Pay particular attention to
oil on the fan housing and starter assembly to
avoid overheating the en^e.
It is normal for a small amount of oil to
appear under the saw ^ier the engine
stops. This is excess oil drainingfrom the bar
and chain when the saw is not in use.
a.
b.
c.
d.
e.
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