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Part of the New Holland Repair Manuals.
This is the factory workshop manual for the New Holland E485B crawler excavator, published by New Holland Kobelco Construction Machinery. It is built the way Kobelco builds a workshop manual, in five parts: safety precautions, operational principle, operational performance test, troubleshooting, and repair instructions. The specification tables give the real pump numbers, the Mechatro control chapter explains how the machine's electronics command the hydraulics, and troubleshooting is split into a code-led part and a symptom-led part before the repair instructions take the machine apart.
What's Inside This New Holland E485B Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction and Index | 1-6 | How to Use the Manual, Page Numbering Scheme, The Five Parts the Workshop Manual Is Built From, Additional References |
| Safety Precautions | 7-54 | General Shop Safety, Machine-Specific Hazards, Safety Plates and Their Locations |
| Operational Principle: Specifications | 55-74 | Machine and Component Specification Tables, Hydraulic Pump and Motor Ratings, Pressures, Flows, Input Power and Torque |
| Operational Principle: Mechatro Control and Electrical System | 75-152 | Mechatro Control System Operation, Electrical System, Sensors and Controllers, Component Operation |
| Operational Principle: Hydraulic Components | 153-290 | Hydraulic Pump Assembly, Pilot Valve, Control Valve with the Travel, Travel-Straight, Bucket Flow Summation and Option Flow Summation Circuits, Swing Device, Travel Device, Swivel Joint, Cylinders, Air Conditioner System |
| Operational Performance Test | 291-326 | Performance Inspection Standard Table, Preparation for Performance Tests, Measurement of Engine Speed and Hydraulic Pressure, Measuring Travel, Swing, Attachment and Swing-Bearing Performances, Mechatro Controller Engine Control Input and Output and Its A-B Output Adjustment |
| Troubleshooting by Error Codes | 327-400 | Error Code Index and the Diagnostic Procedure Behind Each Code |
| Troubleshooting by Trouble | 401-440 | Symptom-Led Hydraulic Fault Finding: All Controls Slow or Dead, Engine Down or Stalled, Movement at Lever Neutral, Poor Fine Operability, Slow Boom Up and Boom Down, Slow Arm in and Independent Arm Out, Slow Bucket Digging, Plus the Electrical and Machine Complaints That Raise No Error Code |
| Repair Instructions: Precautions and Tightening Torques | 441-456 | Disassembly and Assembly Precautions, Standard Tightening Torque Tables |
| Repair Instructions: Upperstructure and Hydraulic Components | 457-799 | Upperstructure Removal, Pump Device, Control Valve, Swing Device, Travel Device, Swivel Joint and Cylinder Overhaul |
| Repair Instructions: Engine Mechanical and Lubrication | 800-939 | Engine Mechanical Disassembly and Assembly, Lubrication System Service |
| Engine Diagnosis and Diagnostic Codes | 940-1030 | Failure Diagnosis for Each Engine Status, Engine Diagnosis Code Tables and Their Procedures |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Main hydraulic pump | ||
| Type | Variable displacement plunger pump with regulator attached | |
| Maximum displacement capacity | 200 cm3 x 2 | |
| Rated pressure | 31.4 MPa (4553 psi) | |
| Attachment boost pressure | 34.3 MPa (4980 psi) | |
| Maximum flow | 370 L/min (98 gal/min) x 2 at 7.8 MPa (1130 psi) | |
| Maximum input power at 1850 rpm | 247 kW (336 PS) | |
| Maximum input torque at 1400 rpm | 1275 N.m (940 lbf ft) | |
| Gear pump | ||
| Type and flow | Fixed displacement gear type, 27.8 L/min (7.3 gal/min) | |
| Swing motor | ||
| Type and displacement | Swash-plate fixed-displacement plunger, 151 cm3 (9.2 in3) | |
| Travel device | ||
| Speed reduction type | Planetary, 2-stage | |
