User manual ORION TELESCOPES & BINOCULARS 10400

[. . . ] EZ Balance TM Sliding Counterweight System for Dobsonian Telescopes #10400 EZ Balance, 1 lb. #10401 EZ Balance, 2. 5 lb. Congratulations on your purchase of a quality Orion telescope accessory. [. . . ] (See diagram. ) Be aware, though, that if the unit is mounted too far toward the side of the tube, it may come into contact with telescope's cradle base and obstruct the motion of the telescope on the altitude axis. So make sure there is enough clearance between the rail (with the weight on it) and the cradle to avoid such contact. Remove the telescope tube from its cradle and lay it on a clean surface, so that the side of the tube opposite the focuser is accessible. Place the aluminum dovetail rail parallel to the length of the tube, so that the wide "base" of the rail is against the tube. The end of the rail that has the nonrecessed hole should butt up against the primary mirror cell trim (on an Orion Deep Space Explorer). Using a Phillips screwdriver, insert the three 1" screws through the holes in the rail, one at a time, and thread them into the telescope tube. Note that the round-head screw should go into the nonrecessed hole, nearest the bottom end of the telescope tube. It serves as a stop to keep the weight, if it is not tightened properly, from inadvertently sliding off the rail and falling onto an unsuspecting foot. Do not overtighten the screws or you may strip the holes in the tube. If the tube of your Dobsonian is a Sonotube (bonded, spiralwrapped paper), you do not need to drill pilot holes before threading the screws in. If the tube material is something other than Sonotube, then pilot holes may be necessary to prevent the material from splitting. Thread the nylon-tipped lock bolt into the hole in the rectangular counterweight. [. . . ] In such cases, simply reposition the sliding weight along the dovetail rail to counterbalance the additional load, until balance is once again attained. Customer Support (800) 676-1343 E-mail: support@telescope. com Providing Exceptional Consumer Optical Products Since 1975 Corporate Offices (831) 763-7000 P. O. Box 1815, Santa Cruz, CA 95061 IN 090 Rev. [. . . ]