TM 10-3530-207-14
5-60. BUTTON SEWING MACHINE ARM ROCKSHAFT MAINTENANCE-continued.
Installation.
(1) Install rockshaft crank (1) onto rockshaft (2). Make sure rockshaft crank (1) is in the correct position
as previously marked Secure with tapered pin (3).
NOTE
The rod screw nut (5) sits inside the tangs of the lower half of the needle bar rod (6).
(2) Loosely install the hinge screw (4) on rod screw nut (5) in the upper half of needle bar rod (6).
(3) Install rod screw (20), rockshaft crank (8) and hinge screw nut (21). Make sure rockshaft crank (8)
smooth side faces the upper half of the needle bar rod (6). Tighten hinge screw nut (21) so that the
rockshaft crank (8) rotates freely.
(4) Tighten hinge screw (4) and rod screw nut (5) in the upper half of needle bar rod (6). Make sure that
the rockshaft crank (8) rotates freely.
(5) Position upper needle bar rod (6) into machine.
(6) Slide rockshaft (2) into the front of the machine through collar (15) into the rockshaft crank (8).
Make sure that the dimple on the rockshaft (2) lines up with the hole for crank screw (10).
(7) Install rod screw nut (11) and crank screw (10).
(8) Tighten crank screw (12).
(9) Install bottom half of needle bar rod (13). Secure with two cap rod screws (14).
(10) Adjust collar (15) to maintain minimum side play without binding rockshaft (2). Secure with two
setscrews (16).
(11) Install needle bar link (17). Secure with link hinge screw (18) and nut (19).
5-182
