Replacing The Carbon Brushes; Replacing The Seal Retainer; Daily Maintenance; Repairs - Husqvarna DM340 Manual De Instrucciones

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.
You should replace the carbon brushes when around half is
left.
You can easily measure this using a slide gauge without
removing the brushes.
Replace the carbon brushes when the distance from the
brush holder to the top level of the brush exceed 0,4 inch/10
mm.
Both carbon brushes must always be replaced as a pair, but
one at a time. Do as follows:
1 Remove the 5 screws from the inspection cover. Use a
chisel in the break tracks to easier remove the inspection
cover.
2 Lift the brush retainer spring to one side (1).
3 Loosen the screw (2).
4 Pull out the carbon brush connector.
5 Pull out the coal brush from the holder (3).
6 Clean the brush holder with compressed air or a brush.
Replace the brush if worn.
7 Fit the new carbon brush. Make sure that the side with the
copper wire is facing the gear box and that the carbon
brush slides easily in the brush retainer. If the carbon
brush is fitted in the wrong direction it can get jammed.
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MAINTENANCE
8 Put the brush holder spring back into place.
9 Insert the carbon brush connection under the screw.
10 Repeat the procedure with the other carbon brush.
11 Guide the inspection cover into the handle's tracks. Begin
with the screw at the very bottom of the handle and
unscrew the inspection cover's five screws.
12 Let the machine idle for 20 minutes to run in the new
carbon brushes.
Let the machine idle for 20 minutes with the Smartstart (R)
activated to run in the new carbon brushes.

Replacing the seal retainer

If there is oil or water coming out of the leakage hole the seal
retainer must be replaced.
1 Loosen the two screws for the water module.
2 Use two flathead screwdrivers to carefully prize open the
seal retainer.
3 Carefully push in the new seal retainer and screw the
water module back on.

Daily maintenance

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

Repairs

Important All types of repairs may only be carried out by
authorised repairmen. This is so that the operators are not
exposed to great risks.