Table of Contents
October 2008 "3072ES / 3772ES / 3772ES HD" Service & Parts Manual
Page ii
SECTION 2
ELECTRICAL SYSTEM ................................................................................2-1
Electrical System - General ................................................................................ 2-2
Diagnostic LED ................................................................................................ 2-2
Battery Charge Indicator .................................................................................. 2-2
Master Disconnect Switch ................................................................................ 2-2
Deutsch Connectors............................................................................................ 2-3
Batteries ............................................................................................................... 2-4
Battery Replacement........................................................................................ 2-6
Battery Charger................................................................................................ 2-7
Controls.............................................................................................................. 2-10
Lower Controls ............................................................................................... 2-10
Upper Controls ............................................................................................... 2-11
Alarms and Switches...................................................................................... 2-12
Limit Switch .................................................................................................... 2-12
Continuity Checks .......................................................................................... 2-14
Motor Controller ............................................................................................. 2-16
SECTION 3
MECHANICAL COMPONENTS ...................................................................3-1
Torque Specifications ......................................................................................... 3-2
Base / Undercarriage........................................................................................... 3-3
Hoses and Cables................................................................................................ 3-3
Raising the Machine ............................................................................................ 3-4
Tires/Wheels ........................................................................................................ 3-5
Changing Tires/Wheels .................................................................................... 3-5
Drive Motors......................................................................................................... 3-6
Front Drive Motors............................................................................................ 3-6
Rear Drive Motor with Brakes .......................................................................... 3-6
Steer Cylinder ...................................................................................................... 3-7
Platform Removal ................................................................................................ 3-8
Lift Cylinder Removal and Installation............................................................... 3-9
Scissor Beam Assembly ................................................................................... 3-10
Outrigger Function ............................................................................................ 3-11
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