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3. Check the oil level once a day, confirming that oil is enough.
4. After feeding oil, securely clamp the oil gauge.
NOTE:
As an optional accessory, oil for the HITACHI Demolition Hammer (one liter) is sold separately.
Use this oil when oil in the tank becomes less than the level indicated in Fig. 6 below.
MAINTENANCE AND INSPECTION
CAUTION:
Be sure to switch power OFF and disconnect the plug before and during maintenance and inspection.
1. Inspecting this demolition hammer
Since use of a dull accessory, such as a bull point, a cutter, etc., will cause motor
malfunctioning and efficiency degraded efficiently, whet it or replace with a new one
without delay when abrasion is noted.
2. 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.
3. Inspecting the retainer (Fig.2 and 3)
The retainer may become loose due to excessive use. Always, pay attention to its proper
functioning to securely hold the accessory shank portion. If any wear and tear is found,
bring this demolition hammer to an authorized service center for maintenance service.
4. Inspecting the carbon brushes: (Fig. 7)
The motor employs carbon brushes which are
consumable parts.
Since an excessively worn carbon brush results in motor
trouble, replace the carbon brush with a new one which
has the same carbon brush No. shown in figure 7 when it
becomes worn to or near “wear limit”.
In addition, always keep carbon brushes clean and ensure
that they slide freely within the brush holders.
5. Replacing a carbon brush
The carbon brush can be removed by removing the cap cover, cap rubber and brush
cap in that order at the interior.
NOTE:
Due to HITACHI’s continuing program of research and development, the specifications herein
are subject to change without prior notice.
Fig. 5 Fig. 6
Oil Gauge
Check the oil quantity by
holding the body upright.
Feed oil when the oil level drops to
less than approx. 7/64” (2.8 mm)
7/64”
(2.8 mm)
Fig. 7
Wear limit
0.67” (17 mm)
0.28” (7 mm)
44
No. of Carbon
Brush