ÐÏà¡±á>þÿ =?þÿÿÿ<ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿì¥Ás ¿ãjbjbÀ À ©2ªkªk—Kÿÿÿÿÿÿ]²²²²¾¾¾¾¾Ú,¾¸ ô*(RRRR¥¥¥u w w w w w w ,¬ô ¨£ ¥ƒ"¥¥¥£ Å²²RR1*ÅÅÅ¥²8RRu TjT²²²²¥u ÅÈÅË¢êu $€”`³¾¾µm HET MIRROR Removal / Installation Procedure Removing Mirrors: Measure angle of wiffle tree of mirror to be removed on truss or lookup strap length and set Move dome and crane to attach lifting fixture Check bolts on lifting fixture to make sure threads are ok Attach lifting fixture to hoist and set lengths of straps Move hoist up and position dome to put lifting fixture into place Lower hoist so lifting fixture is just above mirror to be removed INSTALL EDGE PROTECTORS Put radial strap in middle hole in wiffle tree PRIVATE "TYPE=PICT;URL=YES"INCLUDEPICTURE \d "Image1.jpg" Attach radial ratchet and put some load on wiffle tree (mark position of strap attachment) Leave safety bracket on Tap/clean wiffle tree attach points Replace M30’s with jackscrews(make sure screws are lubricated) starting with top and ending with the one that is toward the center of the array Loosen all safeties, 3 large bolts as well as 6 screws holding brackets Start jacking mirror, moving all jack screws equal amounts WATCH EDGES CONTINUE ON BACKSIDE Make sure gaps are ok as well as keeping all jackscrews loose enough to turn by hand by adjusting radial ratchet Remove edge protectors when mirror about 1/2" above surrounding mirrors Move mirror high enough and attach lifting fixture clamps Load hoist Remove 1/4-20 screws attached to wiffle tree, starting on top, then bottom outside and bottom inside(TOI) Lower jack screws Remove radial ratchet strap while holding wiffle tree While holding wiffle tree run hoist up fast, watching to make sure mirror doesn’t swing into anything, particularly mirrors Hoist mirror up, out and set on cart Remove spherical washers if mirror not being immediately being reinstalled Installing Mirrors: Make sure safety brackets and safety wire are installed Position telescope and dome, position crane, lower hoist, attach lifting fixture to wiffle tree and set strap lengths or angles Lift mirror and move into place by whatever means necessary Install jackscrews and set to proper height Put spherical washers on end of jackscrews Move mirror down until it contacts one of the jackscrews, determine if gaps correct Attach 1/4-20’s to wiffle tree, top first not tight, outer then inner 1/4-20’s If necessary move jackscrews up to touch wiffle tree Tighten 1/4-20’s hand tight Attach radial ratchet strap and load until jackscrews move up slightly radially Lower hoist, remove lifting fixture clamp, holding until hoist is run up, watching to make sure nothing contacts mirrors Remove bottom 2 metric safety bolts from truss Start lowering jackscrews in sync, watching gap and adjust radial ratchet to maintain adequate gap INSTALL EDGE PROTECTORS when edge protectors about 1/2" above surrounding mirrors Move all the way down to the truss, making sure top safety clip positioned properly Install two lower safety bolts Make sure lower 1/4-20’s are tight Make sure radial ratchet is tight CONTINUED ON BACKSIDE Adjust mirror gaps Start removing top 1/4-20, if wiffle tree starts moving away from truss tighten radial ratchet more Remove top jackscrew and install M30 Tighten M30 to proper torque Remove outer jackscrew and install M30 and tighten to proper torque Remove inner jackscrew, install M30 and tighten to proper torque Make sure gap roughly equal around edge of mirror, if not, adjust by loosening 2 of the 1/4-20’s at a time and shifting mirror, BE CAREFUL After each shift, retighten 1/4-20’s to proper torque After centering tighten 1/4-20’s to proper torque and tighten safety brackets and bolts Remove radial ratchet Remove edge protectors Move hoist / crane up and out Collect all tools Remove handling fixture and stow hoist / crane Stuff We Need: Straight metric allen for safety Personal Safety harnesses Spare captive nuts Cabinet for storing harnesses and such Metal bucket for tools Fine adjustment on lifting fixture New lighter lifting fixture Spare jackscrews Spare long hardened 1/4-20 screws Larger knobs with provision for attaching 1/2" ratchet drive Radial Strap attachment to truss Hoist for radial support(McMaster- tool box chain lever hoist) Tools Required PRIVATE "TYPE=PICT;URL=YES"INCLUDEPICTURE \d "Image2.jpg" #1 Strap to attach radial ratchet to truss #2 Spray bottle for edge protectors suction cups #3 Mirror edge protectors #4 Lubricant for jack screws #5 Radial ratchet #6 T-handle 3/16" hex key for 1/4-20 allen screws #7 T-handle 6mm hex key for safety screws #8 5/32" hex key driver for safety brackets #9 T-wrench for M-30’s #10 Ratchet tap handle with 3/8-16 for cleaning wiffle tree attachment points #11 3/8-16 die and handle for cleaning lifting fixture attachment screws #12 Large screw driver to be used as pry bar #13 Torque wrench for tightening 1/4-20 screws in M-30’s #14 Jack screw in M-30 bushing #15 Rope for lifting tool bucket into truss #16 Strap to attach radial ratchet to wiffle tree Safety Wires?? Safety Brackets?? Clean Attach Points!! 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