2000 New Holland DC70/DC80/DC100 Dozer Service Manual (307 P.)

2000 New Holland dozer lineup — Cummins turbocharged diesel engine, hydrostatic transmission, sealed track drive, and blade hydraulic control. Complete shop service documentation with specifications, repair procedures, and parts identification for heavy construction grading equipment.

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Document Details

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Document Number / Seller:
23633 / Robert Thompson
File Size:
12.38 MB
File Type:
PDF
Language:
English
Pages:
307
Printable:
Yes
Category:
Dozer
Last updated / verified
May 3, 2025

Models Covered & Key Technical Specifications

New Holland DC70/DC80/DC100 Dozer Series — 2000 Technical Reference Unit | Construction Dozer Collection.

  • Verified Reservoir Specs: For hydraulic operation, 85 L (22.4 gal) represents the equipment fluid storage volume Architecture.
  • Calibrated Displacement Data: 3920 cm³ (239.1 in³) is specified as the engine cylinder volume Specification.
  • Key Torque Rating: Maximum transmission output reaches 44.5 daNm (322 lb-ft) at 1500 rev/min Framework.
  • Principal Pressure Data: 430 bar (6,236 PSI) — is rated at the hydrostatic transmission operating envelope Norms.
  • Advanced Pump Capacity: The equipment gear pump requires 54 l/min (14.26 gal/min) for full system function Bounds.
  • Designated Battery Specification: Storage capacity reaches 180 Ah (ampere-hour) at 12 V power level Topology.

Professional Workshop Service Manual & Technical Specifications

Strategic Configuration Reference Manual: New Holland DC70/DC80/DC100 Dozer Service Manual (2000) 392 Page Volume | Shop Standards Technical-Guide

Reference-Category: New Holland DC70, DC70 LGP, DC80, DC80 LGP, DC100, DC100 LGP // Operational-Framework: Hydrostatic transmission with closed-circuit control systems / Sealed and lubricated track undercarriage Logic // Design-Core: Four-cylinder turbocharged diesel engines with pilot-operated hydraulic systems.

Assessment-Parameter System-Path Calibration-Spec
Engine Architecture Cummins four-cylinder liquid-cooled diesel with induction turbocharging Specifications documented for DC70, DC80, DC100 variants
Transmission System Dual variable displacement pump and motor hydrostatic design Operating pressures and flow capacities documented
Track Assembly Sealed and lubricated split-master link chains with permanently lubricated rollers Ground contact area and tension specifications included
Blade Control Load-sensing pilot control with adjustable tilt and angle cylinder functions Cylinder dimensions and range of motion data provided
Lubrication Requirements Multi-grade diesel engine oil, gear oil for final drives, hydraulic fluid for circuits SAE specifications and viscosity ranges documented

Diagnostic procedures address engine and transmission systems, undercarriage inspection protocols, hydraulic circuit testing, and electrical component verification. Reference data is included for hydrostatic transmission pressures, engine fuel injection timing, final drive reduction ratios, and track chain pitch measurements. Blade positioning data includes cutting angle ranges, lifting height limits, and moldboard volume specifications for each model variant.

Hydraulic schematics are included for the transmission pump and motor assemblies, servocontrol valve circuits, and equipment hydraulic systems controlling blade functions. Steering component information is provided for the joystick control mechanisms, proportional pressure reduction valves, and directional control solenoids. Inspection guidelines are provided for track idler wheel bushings, bottom roller seals, carrier roller bearings, and sprocket tooth wear patterns. Alignment specifications are included for transmission control elements, pump displacement settings, and final drive gear engagement parameters. Reference data is included for fuel consumption rates, hydraulic pressure settings, torque converter oil levels, and coolant capacity requirements.

The manual documents torque specifications for the transmission pump and final drive assemblies to ensure proper axial load stability. Wiring diagrams illustrate the control panel circuits, solenoid valve activation sequences, microprocessor input signals, and warning light logic. Component specifications address the four-cylinder Cummins engine displacement, the hydrostatic transmission pump displacement range, final drive reduction gear ratios, blade cutting edge material composition, and track chain link dimensions across all model variants.

Disassembly and reassembly procedures are presented for transmission pumps, motors, final drives, track suspension components, and blade control cylinders. The document includes detailed inspection tables for measuring wear on sprocket teeth, idler wheel diameter reduction, bottom roller bushing clearance, and track chain pitch elongation. Lubrication procedures address sealed roller maintenance, track adjuster hydraulic pressure settings, blade hinge lubrication intervals, and transmission fluid cooling system operation.

FAQ

What values are **calibrated** for the proportional pressure reducing valve? keyboard_arrow_down

20 bar minimum and 35 bar maximum pilot pressure settings must be calibrated at the servocontrol system, with output pressure proportional to solenoid current for precise system operation.

Assess the **applicable** tool requirements for final drive disassembly. keyboard_arrow_down

AT711C equipment fixtures including tube guide (AT711C.06), bearing packing tube (AT711C.07), and mounting flange (AT711C.05) are required for proper housing and main bearing fitting during gearbox service procedures.

What components have **exact** electrical values for DC system operation? keyboard_arrow_down

12V 180Ah batteries power the electrical system with 12V-60A alternators providing charging, while solenoid valves operate at 12V DC with 90% minimum voltage capability for reliable energization.

Confirm the **specific** clearance measurements for track roller bushings. keyboard_arrow_down

0.20 to 0.25 mm end play tolerance is required between gear-support groups and pump body, with bushings positioned 2.5 mm below the faying surface of gear supports for optimal lubrication flow.

What tools are **designated** for precision brake assembly verification? keyboard_arrow_down

50 bar pressure gauge with 3-minute test duration confirms correct brake seal function, preventing oil leakage from the negative multidisc parking brake system during hydraulic pilot pressure application.

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The step-by-step instructions made repairs straightforward. The download process was smooth, and I received the link immediately after purchase!
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This manual has been a lifesaver for maintaining our excavators. The breakdown of components is thorough and easy to understand.