1. The motor does not run after the electric hammer is powered on.
Causes:
1) The power supply is disconnected.
2) The connector is loose.
3) The switch has poor contact or does not act.
4) The armature or stator coil is burnt out.
5) Stator coil open circuit.
6) The brush is used up.
Troubleshooting:
1) Repair the power supply.
2) Check all connectors.
3) Repair or replace the switch.
4) Exchange armature or stator coils.
5) If it is broken at the outgoing line, it can be used after re-welding, otherwise it must be rewound.
6) Replace a pair of brushes.
2. The electric hammer makes an abnormal sound after being electrified and does not rotate or rotates very slowly.
Causes:
1) The switch contact is burnt out.
2) The mechanical part is stuck or the dynamic and static parts rub against each other.
3) The drill bit bites or touches the reinforcement.
4) Special nuts are loose.
5) Armature short circuit or open circuit.
6) Stick when drilling deep holes.
7) The power supply voltage is low.
Troubleshooting:
1) Repair or replace the switch.
2) Check the mechanical part.
3) Stop advancing or select another drilling position.
4) Tighten special nuts.
5) Repair or replace the armature.
6) Pull out the drill bit and remove the chips.
7) Adjust the power supply voltage.
3. The motor rotates and the drill bit does not impact or the impact force is weakened.
Causes:
1) There are dust and impurities in the piston rotating sleeve, which block the air hole.
2) The O-ring on the impact piston is damaged or worn.
Troubleshooting:
1) Clean the mechanical part and dredge the air hole.
2) Replace the O-ring seal.
4. Excessive heating of reduction gearbox.
Causes:
1) There is a lack of grease in the reduction box or the grease becomes dirty.
2) The transmission part does not fit well or sundries fall into the interior.
Troubleshooting:
1) Add or replace lubricating grease.
2) Check the transmission part or remove impurities.
5. Excessive heating on the surface of the casing.
Causes:
1) Excessive load or dull bit.
2) The winding is wet.
3) Incorrect assembly makes the armature inflexible.
4) The supply voltage drops.
Troubleshooting:
1) Reduce the load and sharpen the drill bit.
2) Dry the windings.
3) Check whether the armature is stuck or rubs the iron core.
4) Adjust the power supply voltage.
6. Ring fire or large spark is generated on the commutator.
Causes:
1) Armature short circuit or open circuit.
2) Poor contact between brush and commutator.
3) The surface of commutator is not smooth.
Troubleshooting:
1) Repair the armature.
2) Make it in good contact.
3) Remove sundries and make the surface of the commutator smooth.
The above are common faults and troubleshooting methods. If there are other faults that cannot be solved by oneself, please find professional maintenance personnel or send them to the manufacturer for maintenance.
Post time: May-19-2022