New Holland DC70 DC80 DC100 Repair Manual [Bulldozer]

Complete Factory Service Repair Manual For New Holland DC70 DC80 DC100. Detailed step by step illustrations, instructions, diagrams. Digital PDF format, searchable and bookmarked. Clean, sharp images.
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Models

NEW HOLLAND
CONSTRUCTION

DC100
DC80 LGP
DC80
DC70 LGP
DC70
DC100 LGP

Contents

GENERALITIES
SAFETY RULES
TECHNICAL DATA TABLES
GENERAL INSTRUCTIONS
DIAGNOSTIC CHECKS
UNITS OF MEASURE
CLASSIFICATION OF STANDARD PARTS FOR TORQUE DETERMINATION

ENGINE Manual Not included
TRANSMISSION
GENERAL DESCRIPTION
Adjusting the travelling speed
Up shifting
Choosing the travelling direction
Forward and backward travelling
Steering
Reversing
Working brake
Parking brake
INSTALLATION
TROUBLESHOOTING
HYDRAULIC MOTOR
Disassembly
Reassembly
Disassembly
Hydraulic two-position control
TRAVELLING HYDRAULIC PUMP
General description
Disassembly/Reassembly
Tightening torques
Safety rules
Adjustment instructions
Machine towing
TRAVELLING CHARGING AND SERVONTROLS GEAR PUMP
Uncoupling
Pump overhaul
Reassembly
Flow testing
LEFT CONTROL TRAVELLING JOYSTICK STD
General description
Technical data
Disassembly/Reassembly
Friction for left control travelling joystick (optional)
PROPORTIONAL PRESSURE REDUCTION VALVE
General description
MAX PRESSURE VALVE FOR TRAVELLING CHARGING
AND SERVONCONTROLS
Function description, section
PUMP COUPLER
General information
Installation
Maintenance
TRANSMISSION OIL FILTER
Technical data
Changing the hydraulic oil filters
SPEED CHANGE SOLENOID VALVE
Technical data
Reversing solenoid valve
HYDRAULIC PLANT

FINAL DRIVES AND SPROCKET
DESCRIPTION
DISASSEMBLY
INSPECTION OF SPROCKETS
GEARBOX DISASSEMBLY
Description of the components
Lifetime seal check
Instructions for the installation of the half seals
Brake check
Installation of the gearbox to the machine
Connection of the brake pipe
Gearbox lubrication
Oil filling
Start up
Maintenance
Oil replacement and routine checks
HYDRAULIC MOTOR
Longitudinal section
Disassembly
Reassembly
FEATURES AND DATA

UNDERCARRIAGE
GENERAL DESCRIPTION
TROUBLESHOOTING OF MAJOR MALFUNCTIONS
TRACK CHAINS
Disassembly track chains
Inspection of undercarriage components
Replacement of a damaged link
TRACK RELEASE AND ADJUSTER MECHANISM
Disassembly
Inspection and adjustment of track chain tension
TRACK IDLER WHEELS
Removal
Overhaul
Reassembly
TRACK BOTTOM ROLLERS
Removal
Disassembly of bottom rollers with one or two edges
Reassembly
TRACK CARRIER ROLLERS
Disassembly
Reassembly
LUBRICATION OF ROLLERS AND TRACK IDLER WHEELS
SPECIFICATIONS AND DATA

HYDRAULIC SYSTEM FOR BULLDOZER EQUIPMENT
DESCRIPTION AND OPERATING OF HYDRAULIC SYSTEM
EXHAUST SYSTEM
LIFTING CYLINDER SYSTEM
ANGLE CYLINDER SYSTEM
TILT CYLINDER SYSTEM
DISTRIBUTOR
PUMP
Disassembly
Pump overhaul
Reassembly
Flow testing
EQUIPMENT OIL FILTER
Technical data
Changing the hydraulic oil filters
HYDRAULIC OIL TANK AND OIL FILTERS
Removal of the tanks: hydraulic oil tank, fuel tank
SERVOCONTROL SYSTEM
SOLENOID VALVES
Power operation solenoid valve
Inclination blade solenoid valve
Floating blade solenoid valve
C-FRAME, BLADE AND CYLINDERS
C-frame
Control cylinders for blade raising-lowering
Floating function
Blade angle cylinders
Blade tilt control cylinder
Ripper equipment (optional)
Ripper (optional)
Ripper cylinder
Rear hydraulic function (optional)
RIGHT CONTROL TRAVELLING JOYSTICK STD
General description
Disassembly/Reassembly
HYDRAULIC DIAGRAM

ELECTRICAL SYSTEM
SAFETY RULES
MAIN PARTS LOCATION
ELECTRICAL SYSTEM DIAGRAM
FUSES
Fuse card
Solenoid valve configuration
Relay configuration
MICROPROCESSOR MC7
Electronic control unit t3sks
Setting of the electronic control unit (selfleaming)
CONTROL PANEL
ROTATION ANGLE SENSOR WITH NO CONTACT
ENGINE REVOLUTION SENSOR