33
Final assembly
23
To pre-load the balance spring
:
23.1 Apply Loctite 222E to thread of screw (38) and install it through the hole in the mechanism
housing.
23.2 Tighten screw until spring is lightly pre-loaded, then apply a further 2.5 turns.
23.3 Install self-adhesive mechanism housing label (40).
24
Install the pan and tilt brake knobs
(See “Brake knob adjustment” on page 22)
.
25
The pan and tilt drag control knobs are set so that drag begins to be felt between 1 and 2 on the scale.
To adjust the pan drag knob settings
:
25.1 Release the pan brakes.
25.2 Turn the drag control knob (3) until the grub screw (4) is accessible. Slacken the grub screw by
six turns.
25.3 Turn the indicator (2) to zero.
25.4 Hold the indicator (2) stationary and rotate the control knob to the right until drag begins to be
felt.
25.5 Turn the indicator to 2.
25.6 Turn the drag control knob (3) and indicator (2) together until the grub screw (4) is
accessible.Carefully tighten the grubscrew, adjusting the position of the control knob as necessary so
that the grub screw seats correctly in a slot in the indicator and may be screwed fully home.
25.7 Decrease drag to zero.
25.8 Increase drag and ensure that drag begins to be felt at about 1 on the indicator. Repeat the
above procedure until this can be achieved.
25.9 Adjust the tilt drag knob in a similar fashion, referring to