Care and maintenance
10
Care and maintenance
10
Servicing and maintenance intervals
.01
Clean the hook compartment ........................... daily, more often if in continuous operation
Check the hook oil-container .............................................................................once a week
Clean the hook ..................................................................................................once a week
General lubrication .......................................................................................... twice a week
Lubricate the front parts ................................................................................. twice a week
Lubricate the top-feed drive eccentric .................................................................... Annually
10
Cleaning
.02
Fig. 10 - 02
● Clean hook race with petroleum spirit.
● When inserting the bobbin case, make sure that bobbin case position fi nger 3 enters the
● Screw on hook gib 1.
● Insert bobbin case and close post cover.
30
These maintenance intervals are calculated for the average running time of a
single shift operation. If the machine is operated more than this, shorter inter-
vals are recommended.
3
1
slot in the needle plate.
Keystone Sewing Machine Company, Inc.
● Clean hook area with a brush daily, in
2
continuous operation several times daily.
● Clean the hook thoroughly once a week.
● Open post cover.
● Set needle bar at its highest position.
● Remove top of bobbin case together
with bobbin
● Unscrew and remove hook gib 1.
● Turn balance wheel until point of bobbin
case 2 has entered into the groove of the
hook race by about 5 mm.
● In this position remove bobbin case 2.
Switch off the machine!
Danger of injury due to uninten-
tional starting of the machine!