# Preventive Maintenance Level 1

Carry out maintenance after 175 000 - 225 000 tightening, see table Reference Tightening, or once a year whichever comes first.

For maximum tool performance follow below instructions and use recommended service tools and service kits from Atlas Copco. Always use tightening torque and lubrications as recommended by Atlas Copco.

## Tool Handle

- Make a visual inspection for any damage.

- Inspect the yoke and suspension points.

- Inspect the bushing in the Pulse unit casing and the surface of the anvil.

- Clean the inlet strainer.

## Air Motor

- Make a visual inspection for any damage.

- Change the vanes.

- Change the bearings if needed.

## AutoTrim / Trim

- Open and inspect the parts for damage, wear or blockage.

- Clean the needle valve (only AutoTrim).

- Change the sealing if needed (only AutoTrim).

- Assemble and adjust according to instructions.

## Trigger and Reversing Valve

- Look for any leakage and make sure that it works correctly.

- Inspect the O-rings and washer, replace if needed.

## Silencer

- Open and inspect the parts for damage, replace if needed.

- Change the filter.

## Pulse Unit

- Inspect the shut-off mechanism.

- Inspect the square drive and hex drive for any cracks or wear.

- Make sure that the torque adjustment screw has enough friction to prevent the setting from accidently changing during operation.

- Change the oil accordingly.

- Make sure that the pulsing frequency is within limits, as per the Tool Condition Test.

Relevant Information

- Oil Filling and Changing Instruction for Pulse Unit
- Preventive Maintenance
- Tool Condition Test