4-52. BUTTON SEWING MACHINE BED ASSEMBLY MAINTENANCE - continued.
Remove all buildups of grease, dirt, etc, by wiping with a wiping rag (Appendix F, Item 2).
Cleaning solvent, Federal Specification P-D-680, is both toxic and flammable.
Keep off skin. Use only in a well-ventilated area and avoid prolonged
breathing of vapors. Keep away from open flame.
Clean using cleaning solvent (Appendix F, Item 8) and either a wiping rag (Appendix F,
Item 2) or a medium bristle brush (Appendix F, Item 1).
Allow to dry.
Inspect hardware for damage.
Inspect spring for damage and corrosion.
Inspect starting pin for damage.
Repair. Repair of the button machine bed assembly is limited to the replacement of defective
Assemble starting spring (1), starting lever (2), starting pin (3) in the base (4) and secure
with screw (5).
Assemble start/stop screw (6) and lever stop nut (7).
Install lock (8) on base (4) and secure with spring (9), washer (10) and wingnut (11).
Assemble two screws (12) into the base (4).