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1. Loosen the 4 screws between aluminum head and gear box by 12mm HEX head
wrench.(See Fig1)
2. Disassemble the aluminum head, cylinder and piston.(See Fig2)
3. Clean the inside of aluminum head, must be free of metal chip and granular dust (See Fig3)
4. Clean the piston and cylinder. (See Fig 4)
a) Clean the cylinder both inside and outside, especially clean the inside of cylinder, must
be free of metal chip and granular dust. If the conditional, recommend washing by
gasoline.
b) Clean the surface of piston. If the conditional, recommend disassembling the O-ring
and washing the piston by gasoline.
c) At the same time, check the wearing condition of O-ring. If the Outside Diameter (O.D.)
of O-ring is less than the piston O.D., please replace the O-ring to get proper
performance.(Please contact with our authorized dealer to purchase, See the part List).
5. Fill the grease into the aluminum head, please make sure cleaned inside before filling.
a) Recommend the grease from manufacturer site, there is a tube of 60g grease included
the case. (Please contact with our authorized dealer to purchase, See the part List).
Notice：Please Fill the 65g grease into the aluminum head bottom (See Fig 5 and Fig 6)
6. Fill the 12g oil in the cylinder; please make sure it is clean before filling. (See Fig 7)
7. Fill the 5g grease into the piston. please make sure it is clean before filling. (See Fig 8)
8. Assemble back(See Fig 9)
a) Assemble the piston into cylinder, please make sure if the O-ring has been assembled.
b) Assemble the cylinder into aluminum head.
c) Tighten the 4 inner HEX head screws; be careful of no missing spring washer. If tighten
the screws by electrical or pneumatic driver, please check the torque of screw by 12mm
wrench to make sure tightening properly.
d) If the conditional, can put glue on the screw and then screw in(repeat the step above C)
*Suggestion: All above operations to be carried out by our authorized service agent.
Maintenance and inspection
Before do any maintenance, ensure unplug the plug.
1. Inspecting the demolition hammer
Use a dull accessory, such as bull point, cutter, etc., will cause motor malfunction and
efficiency degraded. Replace with a new one when your accessory is abased.
2. Inspecting the mounting screws
Regularly inspect all mounting screws and ensure that they are properly tightened. Any
loose should be tighten immediately, failure to do maybe cause serious hazard.
3. Inspecting the bit retainer
The retainer may become loose due to excessive use. Make sure the bit shank position is
hold securely, if any wear or damage is found, ask the authorized service people to
maintenance.
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