OHAUS 700 Series Field Service Manual

Contents

3-2CHAPTER 3 SERVICING3.1 SERVICE OF SERIES 700 TRIPLE BEAM (Cont.)C. No Beam Movement (Cont.)Problem: Check Pin MissingSolution: Replace. NOTE: There is a long rod under the Balance that is held in placeby 2 pins.Problem: Broken MagnetSolution: Remove Trig Loop and replace Magnet. NOTE: Magnets should attracteach other in force.Problem: Rubber stoppers used in shipping at the end of the Beam and under thePan are still in place.Solution: Remove both.D. Beam Graduations need replacing.Solution: Replace with new Lexan Graduated Strip. The old Graduated Strip willpeel off. When replacing, move front Poise completely to the left and line up newGraduated Strip at zero.E. Zero Adjust Knob ReplacementHold down Leaf Spring with a small screw driver or ball point pen and screw in untilflare has passed over the Spring. This is the most common cause of not being ableto zero the balance. Check to see if the leaf spring is missing.F. Replacing cracked or broken Balance Cup. NOTE: This is a frequent occurrencewhen a balance is dropped and lands on the pan edge. Unscrew Balance Pan andremove Counterweights and shot from Balance Cup. Remove screw holding Bal-ance Cup to Parallel Loop Assembly and remove old Balance Cup. Reassemble,adding or removing shot to bring Balance to zero.