Issue

Possible Cause 

Solution 

Tool does not operate when air is connected with the air inlet

Operating rod is worn, damaged, or bent

Disassemble and repair 

Insufficient lubrication causing blades to stick inside the rotor

Rotate the anvil three turns counterclockwise using a hex wrench to release the blades. Add 1–2 drops of lubricant into the air inlet before operation.

Rust on internal components such as front plate, rotor, cylinder, or end plate

Disassemble the tool and clean or replace affected components.

Internal transmission components are damaged (planet gear, rotor cage, internal gear, or blades)

Disassemble the tool and replace damaged parts.

Bearings are excessively worn

Replace worn bearings and inspect for additional internal damage.

When air into air inlet, the tool run without press the trigger 

End housing O-ring is worn or damaged

Disassemble the tool and replace the O-ring.

Valve plate O-ring is worn or damaged

Disassemble the tool and replace the O-ring.

Unable to shut-off

Valve plate O-ring is worn or damaged

Disassemble the tool and replace the O-ring.

Spring inside the anvil is not positioned correctly (lever type models)

Disassemble the tool and reposition the spring correctly.

Rear clutch, center clutch, retainer, or ball bushing components are worn or damaged

Disassemble the tool and replace damaged components.

Maximum torque output is insufficient

Internal components such as front plate, rotor, cylinder, end plate, or bearings are rusty

Disassemble the tool and inspect affected components. Clean or replace parts as necessary.

Motor blades are worn or damaged

Replace worn blades and inspect motor condition.

Rear clutch is worn or damaged

Replace worn clutch components.

Torque spring has lost elasticity due to fatigue

Replace the torque spring.

Free speed is too low 

Air pressure is insufficient

Check the air supply system and ensure proper operating pressure.

Motor blades are worn or damaged

Replace worn blades and inspect internal motor components.