CHAPTER 3 MAINTENANCE PROCEDURESPioneer Balances Service Manual 3-29 Ohaus Corporation www.ohaus.com3.3.18 Reassembling Analytical Load CellsBefore reassembly, take the following maintenance steps: Be sure all Flexures are straight, or replace them with new ones. Be sure the hole in the Vane is clear and that the Vane is free of debris. Be sure the Magnet is clean and free of debris.Reassemble the Load Cell by following these steps:1. Carefully insert the Ratio Beam into the Load Cell frame. Adjust the black Up/downStop Screw so the Ratio Beam can clear. (See Figure 3-77.)Figure 3-77. Ratio Beam needs to clear thegroove in the Up/Down Stop Screw.Figure 3-78. Service Fixture is installed priorto installing Ratio Beam Flexures.2. Install the Service Fixture.3. Adjust the Up/down Stop Screwso the groove is half way aboveand below the stop tab. (Close itcompletely, then open itcompletely, counting turns, thenclose it half-way.)4. Position the Sideways MotionStop Plate so the small post in theRatio Beam is centered in thehole in the Plate. Then insert andtighten the two screwsFigure 3-79. Sideways Motion Stop Plate andUp/Down Stop Screw.(See Figure 3-78.)5. Install the Ratio Beam Flexures, withelongated hole down. Each screwhas two washers: a silver-colored onenear the Flexure, a black one nearthe screw.6. Move the Contact Board from theRatio Beam to the Load Cell frame.(See Figures 3-78 and 3-80.)Figure 3-80. Elongated holes on RatioBeam Flexures go on the bottom.Avoid breaking the fine wires!Screw holding Contact Board
