September 2016 Service and Repair ManualBoom ComponentsPart No. 1268556 51How to C alibr ate the Pri mar y Boom Angle SensorHow to Calibrate the PrimaryBoom Angle SensorNote: Perform this procedure on a firm, levelsurface with the boom in the stowed position.Note: A digital level will be required to perform thisprocedure.Note: Use the following chart to identify thedescription of each LCD screen control button usedin this procedure.Plus Minus Previous Enter1 Pull out the red Emergency Stop button at theplatform controls. From the ground control box,turn the key switch to ground control and pullout the red Emergency Stop button whileholding the enter button (3 or 4 seconds) untilthe engine symbol appears on the display atthe ground control box, then release.2 Enter sensor calibration mode by pressing thebuttons at the ground controls in the followingsequence: (plus)(enter)(enter)(plus).3 Press the previous button until reset primaryboom angle sensor is shown on the display.4 Press the plus button to select YES, thenpress the enter button to accept.5 Press the previous button until EXIT is shownon the display. Press the plus button to selectYES, then press and hold the enter button toaccept.Result: The alarm should sound.Result: The alarm does not sound. Repeat thisprocedure beginning with step 1.6 Loosen the Primary Boom Angle Sensor(PBAS) assembly bracket fasteners attachedto the primary boom. Loosen the wing nut andhex nut on the threaded rod to allow thethreaded rod to move upward. Tighten thefasteners.7 Set a digital level on top of the primary boommast on a level part of the tube so it is viewablefrom the ground controls.8 Start the engine.9 Raise the boom until the digital level displays70°.10 Loosen the wing nut from threaded rod andmove the threaded rod down until the engineturns off.11 Screw threaded rod into clevis yoke. Tightenthe wing nut to welded bracket. Tighten thejam nut to welded bracket. Tighten the PBASfasteners to boom.Result: The ground control box display shouldread P9B & P11 fault.12 Push in the red Emergency Stop button to theoff position. Wait until display turns off beforeproceeding.13 Pull out the red Emergency Stop button whileholding the enter button (3 or 4 seconds) untilthe engine symbol appears on the display atthe ground control box, then release.14 Enter sensor calibration mode by pressing thebuttons at the ground controls in the followingsequence: (plus)(enter)(enter)(plus).15 Press the previous button until PRIMARYBOOM ANGLE = 70° is shown on the display.16 Press the plus button to select YES, thenpress the enter button to accept.
