Poulan Pro PPB40PS Instruction Manual page 15

NOTE: Chain stretches with use, check and
tension often.
Never tension a warm chain before storing,
as chains shrink when cool, this can damage
chain, bar and saw.
CHAIN TENSION
• Stop the motor and remove the battery
before setting the chain tension. Turn the
bar cover knob counterclockwise to loosen
the bar cover but do not remove the bar
cover. Turn the chain tensioning screw
clockwise to tension chain. Turn the guide
bar knob clockwise to tighten. Refer to the
Replacing the bar and chain section for
additional information.
• Chain must be retensioned whenever the
flats on the drive links hang out of the bar
groove.
• During normal operation, the temperature
of the chain will increase. The drive links of
a correctly tensioned warm chain will hang
approximately 1/16 in. (1.3 mm) out of the
bar groove.
Flats
APPROX 1/16" (1.3 mm)
NOTE: A cold chain is correctly tensioned
when there is no slack on the underside of
the guide bar, the chain is snug, but it can
be turned by hand without binding. New
chain tends to stretch; check chain tension
frequently.
CAUTION: Chain tensioned while warm may
be too tight upon cooling. Check the "cold
tension" before next use.
MAINTENANCE
REPLACING THE BAR AND CHAIN
• Loosen the bar cover knob by turning
counterclockwise and remove the bar
cover.
• The bar contains a bar stud slot that fits
over the bar stud. The bar also contains a
chain tensioning pin hole which fits over
the chain tensioning pin.
• Place the bar onto the bar stud so that
the chain tensioning pin fits into the chain
tensioning pin hole.
• Fit the chain over the sprocket and into the
bar groove. The cutters on the top of the
bar should face toward the bar tip, in the
direction of the chain rotation.
Drivecase
Cover
Pin Hole
Bar Cover
WARNING: To avoid possible serious
injury, stop the motor and remove the battery
from the pole saw before replacing the
bar, chain, or performing any maintenance
operation.
• Replace the bar and tighten the bar cover
knob. Tighten the bar cover knob finger
tight only. The bar must be free to move
for tension adjustment.
• Remove all slack from chain by turning the
chain tensioning screw clockwise, ensuring
that the chain seats into the bar groove
during tensioning.
• Lift the tip of the bar up to check for sag.
Release the tip of the bar and turn the
chain tensioning screw 1/2 turn clockwise.
• Repeat this process until sag does not
exist.
15
Chain
Sprocket
Chain Tensioning
Bar
Chain
Tensioning Pin
Bar Stud
Bar Cover Knob