Sharpening Of The Chain Blade; Selecting Accessories; Maintenance And Inspection - Hitachi CS 30Y Handling Instructions Manual

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If the chain becomes entangled during cutting, stop the
saw and use wedges to free it. Do not cut thorough the
tree.
CAUTION
○ Trees should not be felled in a manner that would
endanger any person, strike any utility line or cause
any property damage.
○ Be sure to stand on the uphill side of the terrain as the
tree is likely to roll or slide downhill after it is felled.

SHARPENING OF THE CHAIN BLADE

CAUTION
Ensure the power source has been disconnected from
the tool before performing the steps below.
Wear gloves to protect your hands.
Dull and worn chain blades will decrease the effi ciency
of the tool and place unnecessary overload on the
motor and various parts of the machine. In order
to maintain optimum effi ciency, it is necessary to
check the chain blades often and keep them properly
sharpened and adjusted. Blade sharpening and
depth gauge adjustment should be accomplished at
the center of the guide bar, with the chain properly
mounted to the machine.
1. Blade sharpening
The accessory round fi le should be held against the
chain blade so that one-fi fth of its diameter extends
above the top of the blade, as shown in Fig. 24.
Sharpen the blades by keeping the round fi le at a 30°
angle in relation to the guide bar, as shown in Fig. 25,
ensuring that the round fi le is held straight, as shown
in Fig. 26. Ensure that all saw blades are fi led at the
same angle, or the cutting effi ciency of the tool will
be impaired. Appropriate angles for sharpening the
blades correctly are shown in Fig. 27.
Keep all cutters the same length.
2. Adjustment of depth gauge
To perform this work, please use the optional
accessory depth gauge jointer and a standard fl at fi le
obtainable in local markets. The dimension shown in
Fig. 28 is called the depth gauge. The depth gauge
dictates the amount of incision (cut-in), and must be
accurately maintained. The optimum depth gauge for
this tool is 0.635 mm.
After repeated blade sharpening, the depth gauge
will be decreased. Accordingly, after every 3-4
sharpenings, place the depth gauge jointer as shown in
Fig. 29, and fi le away that portion that protrudes above
the upper plane of the depth gauge jointer.

MAINTENANCE AND INSPECTION

1. Inspecting the Chain
(1) Be sure to occasionally inspect the chain tension. If the
chain has become slack, adjust the tension as directed
in the section entitled "Adjusting the Chain Tension".
(2) When the chain blades become dull, sharpen them
as directed in the section entitled "Sharpening of the
Chain Blade".
(3) When sawing work has been completed, thoroughly
oil chain and guide bar by depressing the oil button
three or four times while the chain is rotating. This will
prevent rusting.
2. Cleaning the Guide Bar
When the guide bar groove or the oil hole becomes
clogged with sawdust, oil circulation becomes
impaired, which could result in damage to the tool.
Occasionally remove the chain cover and clean the
groove and oil hole with a length of wire, as shown in
Fig. 30.
3. Cleaning the inside of side cover
Tension dial and knob operations will become sluggish
if sawdust or other foreign matter builds up inside the
side cover, and there are cases in which they will cease
to move completely. After using the chain saw and
after replacing the saw chain, etc., insert a fl at-headed
screwdriver into the gap beneath the tension dial as
shown in Fig. 31, lift up the knob and tension dial and
slowly remove the screwdriver to clean the inside of the
side cover and remove all sawdust.
4. Inspecting the carbon brushes (Fig. 32)
The motor employs carbon brushes which are
consumable parts. Since an excessively worn carbon
brush can result in motor trouble, replace the carbon
brushes with new ones having the same carbon brush
No. shown in the fi gure when it becomes worn to or
near the "wear limit". In addition, always keep carbon
brushes clean and ensue that they slide freely within
the brush holders.
The number of the carbon brush will diff er in
accordance with the voltage being used.
5. Replacing the carbon brushes
Disassemble the brush caps with a slotted-head
screwdriver. The carbon brushes can then be easily
removed. (Fig. 33)
CAUTION
Be careful not to deform the brush holder during this
operation.
6. Inspecting the mounting screws
Regularly inspect all mounting screws and ensure that
they are properly tightened. Should any of the screws
be loose, retighten them immediately. Failure to do so
could result in serious hazard.
7. Maintenance of the motor
The motor unit winding is the very "heart" of the power
tool.
Exercise due care to ensure the winding does not
become damaged and/or wet with oil or water.
CAUTION
In the operation and maintenance of power tools, the
safety regulations and standards prescribed in each
country must be observed.

SELECTING ACCESSORIES

The accessories of this machine are listed on page 211.
GUARANTEE
We guarantee Hitachi Power Tools in accordance with
statutory/country specifi c regulation. This guarantee does
not cover defects or damage due to misuse, abuse, or
normal wear and tear. In case of complaint, please send
the Power Tool, undismantled, with the GUARANTEE
CERTIFICATE found at the end of this Handling instruction,
to a Hitachi Authorized Service Center.
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