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54
Fig. 43
SHARPENING ANGLES FOR SHARPENING SAW
CHAIN
1. Part Number 91VG
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 dealer.
Daily maintenance
○ Clean the exterior of the unit.
○ Clean the chain oil fi lter port.
○ Clean the groove and oil fi lter port in the guide
bar.
○ Clean the side case of saw dust.
○ Check that the saw chain is sharp.
○ Check that the bar nuts are suffi ciently tightened.
○ Make sure that the chain transport guard is
undamaged and that it can be securely fi tted.
○ Check that nuts and screws are suffi ciently
tightened.
Especially inspect the bolt of muffl er and ensure
that they are properly tightened before starting
engine. Should any of the bolts be loose,
retighten them immediately. Failure to do so
could result in serious hazard.
○ Check the tip of the 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.
Weekly maintenance
○ Check the starter, especially cord and return
spring.
○ Clean the exterior of the spark plug.
○ Remove the spark plug and check the electrode
gap. Adjust it to 0.024″ (0.6 mm) or change the
spark plug.
○ Clean the cooling fi ns on the cylinder and check
that the air intake at the starter is not clogged.
○ Clean the air fi lter.
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.
○ Clean the fan and the space around it.
○ Clean the muffl er of carbon.
NOTE
When ordering the parts to your nearest dealer,
please use the item numbers showing on the
parts breakdown section in this instruction.
MODEL
NO.
OREGON
BAR NO.
LENGTH-
TYPE
CHAIN NO.
CS33EB 26779
26780
160NDEA041
12″ (300 mm)
14″ (350 mm)
16″ (400 mm)
91VG-045X
91VG-052X
91VG-057X
19
English