Electric Jackhammer
8
3. Insert the centre pin into the guide plate until it reaches the extremities.
4. Fit in the guide plate by aligning its concaved portion with the core bit tip. When the position of the concave
is shifted by turning the guide plate right or left, the guide plate never slips of even when the drill is used in a
downward direction (Fig. 12 in the
Drilling Holes
1. Insert the plug into a power supply receptacle.
2. A spring is built in the centre pin. By gently pressing it to the wall or floor surface in a straight direction, the
entire surface of the core bit tip attains contact to start the hole drilling job.
3. When the hole depth reaches approximately 5mm, the hole position can be determined. Then remove the
centre pin and guide plate from the core bit and continue the hole drilling job.
CAUTION
: when removing the centre pin and guide plate, always disconnect the plug from the power supply
receptacle.
Dismounting the Core Bit
1. By holding the drill (with the core bit inserted) in an upward position, drive the drill to repeat impact operation
two or three times, whereby the screw is loosened and the drill becomes ready for disassembly.
2. Remove the core bit shank from the drill, hold the core bit with one hand, and vigorously strike the head of
the hexagonal portion of the core bit shank with a hand hammer two or three times, whereby the round head
screw is loosened and the drill is ready for disassembly.
Oil Feeding
CAUTION
: Prior to oil feeding, always disconnect the plug from the power supply receptacle.
Since an oil chamber is built in this Electric Jackhammer, it can be used for approximately 20 days without
supplying it with lubricating oil, assuming that the drill is used continuously for 3
– 4 hours daily.
Feed oil into the oil tank as described below before using the Jackhammer (See Figs. 15 and 16 in the
1. If no oil is visible in the oil gauge window when the tool is held upright, feed it with new oil.
2. Before feeding the tool with oil, use the wrench provided to remove the oil gauge.
Be careful not to lose the rubber packing attached below the oil gauge.
3. Check the oil level once daily, confirming that the oil gauge is properly filled.
4. After feeding it with oil, clamp the oil gauge securely.
Maintenance
Inspecting the Tool
Since use of a dull tool will degrade efficiency and cause possible motor malfunction, sharpen or replace the tool
as soon as you note an abrasion
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 hazardous situations.
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.
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