Hitachi CJ 110V Handling Instructions Manual page 25

3. Inspecting the carbon brushes (Fig. 15)
The motor employs carbon brushes which are
consumable parts. When they become worn to or
near the "wear limit", it could result in motor trouble.
When an auto-stop carbon brush is equipped, the
motor will stop automatically.
At that time, replace both carbon brushes with new
ones which have the same carbon brush Numbers
shown in the figure. In addition, always keep carbon
brushes clean and ensure that they slide freely
within the brush holders.
4. Replacing carbon brushes (Fig. 16)
<Disassembly>
(1) Loosen the D4 tapping screw (1 screw) retaining
the tail cover and remove the tail cover.
(2) Use a small screwdriver to pull up the edge of the
coil spring that are holding down the carbon brush.
Remove toward the outside of the brush holders.
(3) Remove the edge of the pig-tails on the carbon
Material
to be cut
Material quality
General lumber
Lumber
Plywood
Mild steel plate
Iron plate
Stainless steel plate
Aluminium copper, brass
Nonferrous
metal
Aluminium sash
Phenol resin, melamin,
resin, etc.
Vinyl chloride,
Plastics
acryl resin, etc.
Foamed polyethylene,
foamed styrol
Card board,
corrugated paper
Pulp Hardboard
Fiberboard
NOTE
The minimum cutting radius of No. 1 (Long), No. 21, No. 22 and No. 41 blades is 100 mm.
No. 1 (Long), No. 11, No. 12, No. 15, No. 16, No. 21, No. 22, No. 95, No. 96 and No. 97 blades are sold
separately.
brushes, from the wiring block group (A) and then
remove the carbon brushes from the brush holders.
<Assembly>
(1) Insert the end of the pig tails of the carbon brushes
in the terminal section of the wiring block (A).
(2) Insert the carbon brushes in the brush holders.
(3) Use the small screwdriver to return the edge of the
coil spring to the head of the carbon brushes.
(4) Check that the pig tails of the carbon brushes are
completely inserted in the pig tail's groove on the
brush holders.
(5) Close the tail cover and tighten the D4 tapping
screw (1 screw).
5. 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.
Table 1 List of appropriate blades
No. 1 No.11 No. 12, No. 15 No. 16, No. 21, No. 22 No. 95 No. 96 No. 97
Blade
(Long) 42
Below 10 – Below
100 60 20
5 – Below
30 10
5 – Below
30 10
10 – 3 –
60 30
10 – 3 –
60 30
46 41
Thickness of material (mm)
10 – 5 –
60 40
5 – 3 –
30 20
3 – Below
10 3
3 – Below
12 3
Height
up to
30
5 – Below 5 – Below
20 6 15 6
5 – Below 5 – 3 –
20 5 30 20
5 – 3 – 10 – 3 –
30 30 60 40
10 – 3 –
60 40
3 – Below
30 6
Below
6
English
3 – Below 2 –
6 3 5
1.5 – 0.5 – 1.5 –
2.5 1.5 2.5
3 – Below Below
12 3 5
Height Height
up to up to
30 30
5 – Below 5 –
20 6 15
5 – Below 5 –
20 5 15
5 – 3 – 5 –
30 30 30
3 – Below 3 –
30 6 30
23