Maintenance And Inspection - Hitachi P 20 SB Handling Instructions Manual

(5) As shown in Fig. 12, 13, insert a turned portion of set
plate (A) attached to set plate (B) into a groove on the
flat portion of the cutter block.
Groove
(6) As shown in Fig. 14, place the blade holder on the
completed assembly and fasten it with the three bolts.
Ensure that the bolts are securely tightened. Follow
the same procedures for the opposite side carbide
blade.
Bolt

MAINTENANCE AND INSPECTION

1. Inspecting the blades:
Continued use of dull or damaged cutter blades will
result in reduced cutting efficiency and may cause
overloading of the motor. Sharpen or replace the
cutter blades as often as necessary.
2. Handling
CAUTION
The front base, rear base, and cutting depth control
knob are precisely machined to obtain specifically
high precision. If these parts are roughly handled or
subjected to heavy mechanical impact, it may cause
deteriorated precision and reduced cutting
performance. These parts must be handled with
particular care.
5
Flat portion of the
cutter block
Set plate (A)
Fig. 12
Fig. 13
Blade holder
Fig. 14
3. 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.
4. Inspecting the carbon brushes (Fig. 15)
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 figure when it becomes worn to or
near the "wear limit". In addition, always keep carbon
brushes clean and ensure that they slide freely within
the brush holders.
Wear limit
12 mm
5. Replacing carbon brushes:
Disassemble the brush caps with a slotted-head
screwdriver. The carbon brushes can then be easily
removed.
6. 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.
7. Service parts list
A: Item No.
B: Code No.
C: No. Used
D: Remarks
CAUTION
Repair, modification and inspection of Hitachi Power
Tools must be carried out by an Hitachi Authorized
Service Center.
This Parts List will be helpful if presented with the
tool to the Hitachi Authorized Service Center when
requesting repair or other maintenance.
In the operation and maintenance of power tools, the
safety regulations and standards prescribed in each
country must be observed.
MODIFICATIONS
Hitachi Power Tools are constantly being improved
and modified to incorporate the latest technological
advancements.
Accordingly, some parts (i.e. code numbers and/or
design) may be changed without prior notice.
GUARANTEE
We guarantee Hitachi Power Tools in accordance with
statutory/country specific 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.
No. of carbon brush
21
5 mm
Fig. 15