Bernina B 570 - Maintenance Checklist BERNINA 590, 570 QE, 540, 520, 500

BERNINA International AG Seestrasse 161 CH-8266 Steckborn Schweiz Seite 170 von 172
DRAFT – VERSION
9.5.4 Maintenance checklist BERNINA 590, 570 QE, 540, 520, 500
1. Covers to be removed
Front and rear cover
Base casing
2. Parts that must be removed
Stitch plate
Hook
Bobbin case
Recommended parts according to Tear-and-Wear Parts
Definition
3. These areas must be cleaned
Free-arm area
Needle bar / needle bar support
Thread take-up crank
Upper thread tension disks
Complete drive unit including motor
Lower-thread sensor
Sensors / light barriers
4.
Check these parts for scratch marks,
deformations, exceptional wear and/or oxidation
and polish or replace if required
Thread redirecting guides
Thread regulator spring / upper thread indicator actuating lug
Needle holder thread guide / thread redirections
Hook
Bobbin carrier (check for thread remnants under tension
spring)
Stitch plate
Presser feet
Feed-dogs
5.
Assembly
of the removed and replaced parts
6. Oiling / lubrication according to lubrication
diagram in Service Manual
Needle bar / needle bar support
Thread take-up crank
Spherical bearing
Hook drive shaft and hook drive eccentric
Hook
Shafts / axes
Eccentric / cams
7.
Check / adjust settings according to Service
Manual
(Use a new needle 130/705H 80 TCN)
all drive belts
Position of head plate in y- and x-direction
Darning foot level
Presser foot fixation
Distance between and parallel alignment of needle bar and
presser foot bar
Needle distribution / zigzag stop
Hook, feed-dog and needle drive synchronization
Loop lift
Needle-/hook distance
Needle penetration in Y direction
Needle level
Feed-dogs
Mechanical basic settings of balance
Automatic thread cutter
Synchronizing disk
Threader mechanism
Basting solenoid
Thread tensions
Winder
8. Fitting
Covers (ensure correct placement of cables and
connections)
9. Check /calibrate tests in Service Program
Balance
Buttonhole calibration
(only use presser foot 3A that has come with the machine).
Cleaning- and service-counters reset
Enter service/maintenance date etc.
10.
Sewing-off
According to Sewing-Off Guideline SI 47-050
11.
Cleaning
Covers
12. Final check
Does the machine run, are the accessories complete?
Check-out tests in Service Program (see 11)