Troubleshooting - Husqvarna DM400 Operator's Manual

Maintenance
Make sure that the nuts and screws are tight.
Make sure that the ON/OFF switch operates correctly.
Replace the gear oil.
Examine the carbon brushes for damage.
To clean the product
CAUTION: Make sure that no water goes
into the motor or the gearbox.
CAUTION: Do not use running water to
clean the product.
• Use a dry or moist cloth to clean the product.
• Remove blockage from all air openings. A blocked
air intake decreases the performance of the product
and can cause the motor to become too hot.
• Clean and lubricate the spindle shaft thread.
To do maintenance of the diamond drill
bit
• Make sure that the diamond tools segments are
sharp. Sharpen blunt diamond segments with a SiC
grind stone.
• Make sure that there is no vibration in the drill bit. If
there is vibration in the drill bit, the diamond
segments can come loose.
• Make sure that the diamond segments are
sufficiently larger than the inner and outer diameter
of the drill bit tube.
• Lubricate the drill bit thread with water resistant
grease. This makes it easy to loosen the tool.
Troubleshooting schedule
If you cannot find a solution to your problems in this
operator's manual, speak to your Husqvarna service
agent.
1188 - 008 - 14.09.2020
Before
each use
• Make sure that the radial run out at the diamond
segments of the drill bit is not more than 1 mm.
To replace the gear oil
• Let an approved Husqvarna service center replace
the gear oil.
To examine the water connection
• Let an approved Husqvarna service center repair the
water connection.
To examine the carbon brushes
1. Remove the 4 screws that hold the cover for the
carbon brushes. Use a flat wide screwdriver. (Fig.
27)
2. Examine the carbon brushes. The area of wear must
be smooth and not damaged.
3. If it is necessary, let an approved Husqvarna service
center replace the carbon brushes.

Troubleshooting

After
Daily
each use
*
X
CAUTION: If there is gear oil leakage, stop
the product and speak to an approved
service center. The gear becomes damaged
if the gear oil level is not sufficient.
CAUTION: If there is a leakage of water
from the water connection ring, the shaft
seals must be replaced immediately.
After
After the
each 300
first 100 h
h
O
X
15