Orion StarBlast II 4.5" Focuser Shim Kit Installation Instructions
# 63038
IN 683 12/22
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Figure 1. Remove the cover plate that holds the focus knob
shaft assembly to the rack and pinion focuser by removing the
two Phillips-head screws
Figure 3. There is a small at spring intended to maintain
tension of the focus knob assembly shaft against the rack
gear of the drawtube. Because this connection is greased you
may nd the at spring stuck to the focuser housing as shown
in Figure 2 or in the cover as shown in Figure 3a. Carefully
remove it and set it aside. It will help to take note of the
orientation of the spring as you will need to set it back in the
same position when reassembling.
Figure 2. Lift the drawtube assembly from the focuser
housing by simply grasping it by the top ring and gently pulling
it outward.
b.
a.
Focus knob shaft assembly
Cover plate
Flat spring
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