Part No. 139378 Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22NJune 2011Section 3 Rev Scheduled Maintenance Procedures, continuedA Checklist D ProceduresD-1 Check the Primary Boom Wear Pads ......................................................... 3 - 23D-2 Check the Free-wheel Configuration ........................................................... 3 - 24D-3 Check the Turntable Rotation Bearing Bolts ............................................... 3 - 25D-4 Replace the Drive Hub Oil .......................................................................... 3 - 26D-5 Replace the Hydraulic Tank Return Filter Element ..................................... 3 - 26D-6 Inspect for Turntable Bearing Wear ............................................................ 3 - 27A Checklist E ProceduresE-1 Test or Replace the Hydraulic Oil ............................................................... 3 - 29E-2 Grease the Steer Axle Wheel Bearings ...................................................... 3 - 31Section 4 Rev Repair ProceduresIntroduction ............................................................................................................ 4 - 1A Platform Controls1-1 Controllers .................................................................................................... 4 - 2A Platform Components2-1 Platform Leveling Slave Cylinder .................................................................. 4 - 42-2 Platform Rotator ........................................................................................... 4 - 52-3 Platform Overload System (if equipped) ....................................................... 4 - 7A Jib Boom Components3-1 Jib Boom ...................................................................................................... 4 - 93-2 Jib Boom Bell Crank (models without rotating jib boom) ............................. 4 - 103-3 Jib Boom Rotator (models with rotating jib boom) ....................................... 4 - 113-4 Jib Boom Lift Cylinder ................................................................................ 4 - 13TABLE OF CONTENTSix