Pentax 10 - Manual (Page 22)

22
Service
Instructions for some procedures follow. For other service questions,
just send an email or give me a call!
Cleaning
Clean the optics only when really necessary, following the instructions
in the prior section.
Wipe the laminated bearing surfaces and the remainder of the scope
with a damp cloth, then a clean, dry one.
Nuts and Bolts
Periodically check all fasteners for proper tightness to insure stability
and top performance. Do not overtighten screws, particularly those
threaded into the Apple Ply structures.
Strut Clamp Adjustment Strut Clamp Adjustment Strut Clamp Adjustment Strut Clamp Adjustment Strut Clamp Adjustment
It is desirable that the strut clamp knobs are at a right angle to the
strut when properly tight. With wear, this may change, and can easily
be adjusted.
1. Note which direction and how far you wish the knob to be turned.
2. With the strut extended, loosen the knob about 5 turns.
3. Push the knob in against the spring so the hex head of the screw is out
of its socket.
4. Rotate the knob and screw together one or more flats on the hex.
5. Tighten the knob and check. Repeat the above steps if needed.
Strut Length Adjustment Strut Length Adjustment Strut Length Adjustment Strut Length Adjustment Strut Length Adjustment
If you use eyepieces with a focal plane location far from the eyepiece
seating surface, you may exceed the adjustment range of the focuser.
That may be moved a few millimeters by shifting the strut locations.
Do this only if really necessary, and do not be tempted to change it
routinely. It must be carefully done, matching the location of all struts
to keep the scope square.
A strut may be shifted slightly by loosening the 4 set screws holding the
bottom section in the mirror box. The range of movement is very
limited. Do not move the bottom of the strut section higher than the
bottom surface of the mirror box. Do not extend it more than about
9mm below the bottom to avoid interference with the plate in the rocker
box. Use a gauge to match the positions, and retighten all four screws.
Do not overtighten! This could bend the struts.
Do not overtighten! This could bend the struts. Do not overtighten! This could bend the struts. Do not overtighten! This could bend the struts. Do not overtighten! This could bend the struts.