5-34. DARNING SEWING MACHINE HOOK DRIVING SHAFT - continued.
(1) 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
(2) 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). Do not clean thread guide felt.
(3) Allow to dry.
(1) Inspect hardware for damage
(2) Inspect shaft for straightness and damage.
(3) Inspect collar for damage.
(4) Inspect bushing for damage.
(5) Inspect gear for damage.
Repair. Repair is limited to the replacement of defective parts and the removal of burrs.
(1) Install bushing (1) into the machine. Make sure the flat of the bushing lines up with setscrew (2).
Center the bushing then secure with setscrew (2).
The oil hole faces up.
(2) Install bushing (3) into the machine. Make sure the flat spot on the bushing lines up with
the setscrew (4). Let bushing extend about 3/8" from casting, tighten setscrew (4).
(3) Slide shaft (5) through bushing (3), collar (6) and bushing (1).
(4) Install pulley (7). Make sure one setscrew (8) lines up with grove on shaft (5). Let pulley
come to a rest on shaft (5) and tighten both setscrews (8).
(5) Tighten two setscrews (9) on collar (6).