Case 120 - Page 3

TABLE OF CONTENTS
GENERAL
Safety Precautions ............................................................................. 3,4
Introduction
..................................................................................... 5
Nomenclature and Machine General Description
................................................. 6,7
Directional Reference
............................................................................ 8
Parts and Service
................................................................................ 8
SECTION 1 • SCHEDULED PREVENTIVE MAINTENANCE
Lubricant and Fluid Recommendations ............................................................ 9
Component Capacities
.......................................................................... 10
Pressure Settings
............................................................................... 1 0
Maintenance Schedule
.......................................................................... 11
Service Chart ................................................................................ 12, 13
Pictorial Listing
of Grease Fitting Locations ................................................... 14, 15
SECTION 2 • THE UNDERCARRIAGE
Description, Maintenance and Troubleshooting ............................................ 16 thru 26
Carbody and Turntable Bearing ................................................................ 17
Track Assemblies
...................................................................... 18 thru 22
Track Drive Assemblies ................................................................ 22 thru 26
Disassembly and Repair .................................................................. 27 thru 42
General Cleaning Instructions ................................................................. 27
Upper Track Rollers
........................................................................ 28,29
Lower Track Rollers
........................................................................ 30,31
Idler Wheel Assembly .................................................................. 31 thru 33
Digging
Brake ............................................................................ 34-35B
Track Drive Transmission
.............................................................. 36 thru 42
SECTION 3 • THE UPPERSTRUCTURE
Description, Maintenance and Troubleshooting ............................................ 43 thru 54
Pump Drive System
.................................................................... 43 thru 48
Swing System
......................................................................... 49 thru 53
Boom
Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......... 54
Disassembly and Repair . ................................................................. 55 thru 67
Pump Drive Transmission and Clutch
................................................... 56 thru 59
House
Brakes ................................................................................ 59
Swing Gearbox ........................................................................ 59 thru 65
Turntable Bearing Replacement
........................................................ 65 thru 67
Boom Removal
..........................................................•.................... 67
SECTION 4 • THE ELECTRICAL SYSTEM
Description, Maintenance and Troubleshooting ............•..•.•.............••....•.....• 68 thru 79
The Charging System .................................................................. 69 thru 74
Control Circuits .•........•..............................................•...•...•..•.. 74 thru 77
Lights and Instrument Circuits .........................................•...................... 78
Disassembly and Repair . ........................................................................ 79
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