Makita HR5000K instruction manual Maintenance, Replacing carbon brushes, Lubrication

bit on the concrete and turn the tool on. Once the core bit has cut a shallow groove into the concrete, rotate the change lever to theposition and resume drilling.

1

2

003225

1.Hex wrench

2.Rear cover

003212

NOTE:

Use a screwdriver to remove the brush holder caps. Take out the worn carbon brushes, insert the new ones and secure the brush holder caps.

•No problem is caused even if the core bit unscrews

slightly during brief use since the core bit rotates in the tightening direction.

To remove the core bit, follow the same removal procedures covered in "When using the center bit".

MAINTENANCE

CAUTION:

•Always be sure that the tool is switched off and unplugged before attempting to perform inspection or maintenance.

•Never use gasoline, benzine, thinner, alcohol or the like. Discoloration, deformation or cracks may result.

Replacing carbon brushes

1

2

003231

Lubrication

1

2

1.Screwdriver

2.Brush holder cap

1.Lock nut wrench

2.Crank cap

2

1

3

001146

1.Commutator

2.Insulating tip

3.Carbon brush

003236

This tool requires no hourly or daily lubrication because it has a grease-packed lubrication system. It should be relubricated after every 6 months of operation. Send the complete tool to Makita Authorized or Factory Service Center for this lubrication service. However, if circumstances require that you should lubricate it by yourself, proceed as follows.

When the resin insulating tip inside the carbon brush is exposed to contact the commutator, it will automatically shut off the motor. When this occurs, both carbon brushes should be replaced. Keep the carbon brushes clean and free to slip in the holders. Both carbon brushes should be replaced at the same time. Use only identical carbon brushes.

Use a hex wrench to remove the rear cover.

Run the tool for several minutes to warm it up. Switch off and unplug the tool.

Remove the crank cap using a Makita lock nut wrench 35 (optional accessory). Rest the tool on the table with the bit end pointing upwards. This will allow the old grease to collect inside the crank housing.

7