Makita 9911K [6/20] Maintenance

Speed adjusting dial (Fig. 7)

For 9911 only

The belt speed can be infinitely adjusted between 75m and 270m per minute by turning the speed adjusting

dial to a given number setting from 1 to 6. Higher speed is obtained when the dial is turned in the direction of

number 6; lower speed is obtained when it is turned in the direction of number 1. Select the proper speed for

the workpiece to be sanded.

CAUTION:

The speed adjusting dial can be turned only as far as 6 and back to 1. Do not force it past 6 or 1, or the speed

adjusting function may no longer work.

Clamps (optional accessory) (Fig. 8)

This tool can be operated in the inverted position. To do so, secure the tool to a stable workbench with two

clamps as shown in Fig. 8.

Connecting to Makita vacuum cleaner or dust collector

Cleaner sanding operations can be performed by connecting the belt sander to Makita vacuum cleaner or dust

collector.

When connecting to Makita vacuum cleaner (Model 406/431), an optional hose 28 mm in inner diameter is

necessary. See the figure below.

Makita vacuum cleaner Hose of vacuum cleaner Optional hose 28 mm in inner dia

When connecting to Makita dust collector (Model 420), the optional hose is not necessary. You can connect

the belt sander directly to the hose of the dust collector.

MAINTENANCE

CAUTION:

Always be sure that the tool is switched off and

unplugged before carrying out any work on the tool.

Replacement of carbon brushes

(Fig.9,10&11)

Replace carbon brushes when they are worn down to

the limit mark. First, remove the belt cover from the

tool, then replace the carbon brushes. Both identical

carbon brushes should be replaced at the same time.

To maintain product safety and reliability, repairs,

maintenance or adjustment should be carried out by

a Makita Authorized Service Center.