Maintaining The Guide Bar; Replacing A Worn Saw Chain; Replacing A Worn Guide Bar - Oregon PS250 Instruction Manual

• After sharpening all cutters, use the file guide
to check the depth gauges again Reset the
depth gauge if necessary
• Replace the chain, replace the side cover, and
replace the battery

Maintaining the Guide Bar

To even bar wear and maximize bar life, flip the
bar occasionally
Wear gloves
• Remove the battery
• Loosen the side cover knob and remove the
side cover
• Adjust the tensioning screw as far back
toward the rear of the cutting head as it will
go
• Remove the bar and chain
• Flip the bar vertically (Fig 40) and reinstall
the bar and chain as described in "Assembling
the Guide Bar and Saw Chain"
FIG. 40

Replacing a Worn Saw Chain

When the saw chain becomes cracked or has
broken teeth, or when it is stretched to the
point that it cannot be kept at proper tension, it
must be replaced
Wear gloves
• Remove the battery
• Loosen the side cover knob and remove the
side cover
• Adjust the tensioning screw as far back
toward the rear of the cutting head as it will
go
30
Maintenance and Cleaning
• Remove the bar and chain
• Install the new chain as described in
"Assembling the Guide Bar and Saw Chain"
• Tension the chain as described in "Tensioning
the Saw Chain"

Replacing a Worn Guide Bar

WARNING: The edges of a worn guide
bar, particularly the edges of the groove
where the chain touches the bar, can be
extremely sharp. Use appropriate hand
protection.
When the guide bar becomes cracked or has
excessive wear around the edges, particularly
in the groove where the saw chain touches
the bar, it must be replaced Also, if the nose
sprocket is worn, has teeth missing, or does not
turn smoothly, the bar must be replaced
Wear gloves
• Remove the battery
• Loosen the side cover knob and remove the
side cover
• Adjust the tensioning screw as far back
toward the rear of the cutting head as it will
go
• Remove the bar and chain
• Install the new chain as described in
"Assembling the Guide Bar and Saw Chain"
• Tension the chain as described in "Tensioning
the Saw Chain"
Pole Saw Model PS250