11
3.
How to dismount the core bit
(1)
By holding the rotary hammer (with the core bit inserted) in an upward position, drive the rotary
hammer to repeat impact operation two or three times, whereby the screw is loosened and the rotary
hammer becomes ready for disassembly.
Fig. 12
(2)
Remove the core bit shank from the rotary hammer and strike the head of the core bit shank
strongly two or three times with a hammer holding the core bit, then the thread becomes loose and
the core bit can be removed.
Fig. 13
HOW TO REPLACE GREASE
Low viscosity grease is applied to this rotary hammer so that it can be used for a long period without
replacing the grease. Please contact the nearest service center for grease replacement when any grease
is leaking from loosened screw.
Further use of the rotary hammer with lock off grease will cause the machine to seize up reduce the
service life.
CAUTION:
A special grease is used with this machine, therefore, the normal performance of the machine may be
badly affected by use of other grease. Please be sure to let one of our service agents undertake
replacement of the grease.
When you have to replacement the grease by yourself, please following the order:
CAUTION:
Before replenishing the grease, turn the power off and pull out the power plug.
(1) Remove the oil tank cover and wipe off the grease inside.
Fig. 14
(2) Supply 30g of XINPU Electric Hammer Grease (Standard accessory, contained in tube) to the
crank case.
(3) After replenishing the grease, install the oil tank cover securely.
NOTE:
The XINPU Electric Hammer Grease is of the low viscosity type. If necessary purchase from an
XINPU Authorized Service Center.
MAINTENANCE AND INSPECTION
1. 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 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. 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.
4. Inspecting the carbon brushes
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 of specification with standard. In addition, always keep carbon brushes clean
and ensure that they slide freely within the brush holders.
