DURKOPP ADLER 838 Instruction Manual page 30

9. Maintenance
9.1 Cleaning and testing
Maintenance work
to perform
Machine head
- Remove sewing dust and
residual thread. (for example,
with compressed air)
- Remove sewing dust and
residual thread.
(for, example with
compressed air)
- Check the hook.
28
Caution: danger of injury!
Turn the main switch off.
Maintenance work on the sewing machine must only be carried out
when the machine is switched off.
All maintenance work must be carried out before or at the maintenance
intervals defined in the table (check the "operational hours" column).
When working with materials that are thick and fibrous, shorter
maintenance intervals may be required.
A clean machine is a trouble-free machine.
1
2
3
4
5
6
7
Explanation
Points to be particularly well cleaned:
- Area below and around the stitch plate, feed
dog (2), and top roller.
- Area around the hook (7)
- Bobbin housing (1)
- Thread trimmer
- Area around the needle
CAUTION!
Be sure to hold the compressed air cleaner so
that no sewing dust is blown into the oil
collector.
Take off stitch plate, thread trim blade (4) and
hook plunger ring (6). Remove the bobbin
housing (5) from the hook. Clean the inner
area of the hook. Clean the bobbin housing.
In particular, look for residual adhesive on the
surface (1).
Check the play on the track between bobbin
housing (5) and the hook (7).
9
8
Operating interval
(hours)
8
20
500