Replacing The Carbon Brushes; Daily Maintenance - Husqvarna DM 230 Operator's Manual

3 Unscrew the six screws holding the motor - gearbox
modules together.
4 Carefully disassemble the machine.
5 Empty the gearbox oil into the container.
6 If necessary contact your dealer to clean the gearbox.
7 Pour the new oil into the gearbox, about 0.25 litres.
8 Fit a new O-ring between the motor cover and the gearbox
cover. Contact your dealer to receive the correct O-ring.
9 Reassemble the machine and screw in the six screws.

Replacing the carbon brushes

The carbon brushes must be removed and checked regularly.
Weekly if the machine is used daily or at longer intervals if the
machine is used more seldom. The area of wear should be
even and undamaged.
Both carbon brushes must always be replaced as a pair, but
one at a time. Do as follows:
1 Remove the inspection cover's screws, 3.
1 Lift the carbon brush holder spring to one side.
2 Loosen the screw.
3 Pull out the carbon brush connector.
MAINTENANCE
4 Pull the carbon brush out from the holder.
5 Clean the brush holder with compressed air or a brush.
Replace the brush if worn.
6 Fit the new carbon brushes and, at the same time, check
that they slide easily in the brush retainers.
7 Put the brush holder spring back into place.
8 Insert the carbon brush connection under the screw.
9 Repeat the procedure with the other carbon brush.
10 Refit the inspection cover screws, 3. Press together the
rear section to make it easier to secure the screws. Make
sure that the inspection cover enters its slots.
11 Let the machine idle for 10 minutes to run in the new
carbon brushes.

Daily maintenance

1 Check that nuts and screws are tight.
2 Check that the power switch unit works smoothly.
3 Check the ground fault circuit interrupter.
4 Clean the outside of the machine.
5 Check and clean the cooling air openings.
6 Check that the cord and extension cord are intact and in
good condition.
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