15
SHARPENING ANGLES FOR SHARPENING SAW CHAIN
1. Part Number
91PX
2. Pitch
3/8
″
3. Depth Gauge Setting
0.025
″
4. Side Plate Filing Angle
80°
5. Top Plate Angle
30°
6. File Guide Angle
90°
Maintenance schedule
Below you will
fi
nd some general maintenance instructions. For
further information please contact Hitachi Authorized Service
Centers.
Inspection and service before use
○
Check that no peel-o
ff
, degradation, or damage is observed in
the Anti-Vibration rubber members, and no loosening or damage
is observed in their
fi
xtures.
○
Check that no damage is observed in the Anti-Vibration springs,
and no loosening or damage is observed in their
fi
xtures.
○
Check that no deformation or damage is observed in the front
and rear handles.
○
Check that the
fi
xtures for front and rear handles are su
ffi
ciently
tightened and free of damage.
○
Check that bolts, nuts, etc. used for each part are su
ffi
ciently
tightened and free of damage.
Daily maintenance
○
Clean the exterior of the unit.
○
Clean the chain oil
fi
lter port.
○
Clean the groove and oiler port in the guide bar.
○
Clean the side case of saw dust.
○
Check that the saw chain is sharp.
○
Check that the guide bar clamp nuts are su
ffi
ciently tightened.
○
Make sure that the guide bar cover is undamaged and that it can
be securely
fi
tted.
○
Check that nuts and screws are su
ffi
ciently tightened.
○
Check the tip of the guide bar. Please exchange it for the new
one when it is worn out.
○
Check the band of chain brake. Please exchange it for the new
one when it is worn out.
○
Check that the chain does not rotate when the engine is idling.
○
Clean the air
fi
lter.
Weekly maintenance
○
Check the recoil starter, especially cord.
○
Clean the exterior of the spark plug.
○
Remove the spark plug and check the electrode gap. Adjust it to
0.6 mm or change the spark plug.
○
Check that the air intake at the recoil starter is not clogged.
Monthly maintenance
○
Rinse the fuel tank with gasoline, and clean fuel
fi
lter.
○
Clean chain oil
fi
lter.
○
Clean the exterior of the carburetor and the space around it.
Quarterly maintenance
○
Clean the cooling
fi
ns on the cylinder.
○
Clean the fan and the space around it.
○
Clean the carbon of mu
ffl
er.
CAUTION
Cleaning of cylinder
fi
ns, fan and mu
ffl
er shall be done by Hitachi
Authorized Service Centers.
NOTE
When ordering the parts to Hitachi Authorized Service Centers,
please use the item numbers showing on the parts breakdown
section in this instruction.
Guide bar and saw chain combinations
BAR NO.
LENGTH-
TYPE
NOSE-
TYPE
CHAIN NO.
(OREGON)
MODEL
NO.
E&S
PO14-50CR
PO16-50CR
14
″
16
″
SPROCKET
SPROCKET
91PX – 52
91PX – 57
000Book̲CS33ED̲Eng.indb 15
000Book̲CS33ED̲Eng.indb 15
2013/12/10 15:38:47
2013/12/10 15:38:47
