Troubleshooting - WilTec JH95A Operation Manual

Exhaust pipe
Regularly perform maintenance on the exhaust pipe. Use a screwdriver in order to remove foreign
matter and impurities.
Lubricating the gearbox
Open the gearbox cover in order to lubricate the eccentric shaft. The eccentric shaft should be lubri-
cated in regular intervals.
Cylinder cooling fins
Regularly remove the dust from the cylinder cooling fins in order to ensure that the cylinder receives
sufficient cooling. This is especially important as the jackhammer is air cooled and the cooling effect is
gravely affected by the condition of the cooling fins. Clogged cooling fins might cause the motor to
overheat and the device to take severe damage in the process.
Lubricating the cylinder
50g of special lubricant need to be put into the cylinder after a total working time of about 50 hours.

Troubleshooting

Trouble starting the cold motor
Issue
The spark plug is wet
The spark plug produces sparks
Too much fuel absorption
Trouble restarting the device after an abrupt stop
Issue
Fuel is leaking or the carburettor is blocked
The oil filter is clogged
Too much carbon accumulation
Slow acceleration and loss of power
Issue
Either the cylinder or the silencer is covered by
carbon accumulation.
The fuel line and/or the ventilation is clogged
The air filter is clogged
The device works fine, but the quality of the demolition is not sufficient
Issue
The chisel is worn out
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Solution
Let the spark plug dry
Replace the spark plug
Reduce the fuel supply
Solution
Add some fuel or clean the carburettor
Clean the oil filter
Remove the carbon accumulation
Solution
Remove the carbon accumulation
Clean the affected areas
Clean the air filter
Solution
Resharpen and reforge or replace the chisel
October 2019 Version 2
Seite 9