Liebherr A900 A902 A912 A922 A942 Service Manual Excavator manuals in PDF

Liebherr A900 A902 A912 A922 A942 Service Manual Excavator

The Liebherr A900 A902 A912 A922 A942 Service Manual Excavator is an indispensable resource for maintaining and servicing Liebherr excavators. This comprehensive factory service manual, formatted in PDF, is meticulously designed to facilitate users with detailed instructions, illustrations, and diagrams. Covering models A900, A902, A912, A922, and A942, it spans 1299 pages and is issued for the period 1982-1988. The manual is written in English and is equipped with bookmarks for easy navigation, along with detailed wiring and hydraulic diagrams.

Contents Overview

Tables/Data/Torque

• Description of Metric Bolts / Wrench Sizes: Provides detailed information on metric bolts and their corresponding wrench sizes.
• Tightening Torques: Includes tables for tightening torques for different bolt grades, ensuring secure and proper assembly.
• ISO Tolerances: Offers standardized tolerances essential for precise mechanical work.
• Graphic Symbols: Contains symbols used in hydraulic, pneumatic, and electrical schematics for easy reference.

Tools/Special Tools

• Special Tools for Excavator: Lists essential tools such as pressure gauges, flow meters, and spool clamps, necessary for accurate maintenance.
• Mini Text System: Detailed information on specific tools like the mounting tool for hydraulic cylinders and the piston wrench, ensuring proper handling and usage.

Welding

• Welding Joints: Provides guidelines and instructions on welding techniques and joint types specific to Liebherr excavators.

Lubricants

• Lubricant Chart and Lubricating Oil: Detailed charts and information on the types and specifications of lubricants required for different components.

Technical Data/Inspection Schedule

• Technical Data: Comprehensive technical specifications for models A900, A902, A912, A922, and A942, ensuring users have all necessary data at their fingertips.
• Inspection Schedule: Detailed inspection schedules for each model, helping in routine maintenance and early detection of potential issues.

Engine

• Deutz and Liebherr Engines: Detailed information and service instructions for various Deutz and Liebherr engines including FL 912, BFL 913/913 C, D 904 NA/T, and D 906 NA/T.
• Sensor Controlled Low Idle Automatic: Instructions on maintaining and troubleshooting the sensor-controlled low idle automatic system.

Swing Gear/Swing Brake

• Torque Values: Essential torque values for various components.
• Remove and Install Instructions: Step-by-step guides for removing and installing swing gears and brakes.
• Disassembly/Assembly Instructions: Detailed procedures for the disassembly and assembly of swing gear systems.
• Troubleshooting: Comprehensive troubleshooting guides for swing brakes, ensuring efficient and timely repairs.

Hydraulic System

• General Information and Pressure Settings: Fundamental details and pressure settings for hydraulic systems across different models.
• Control Systems: Detailed information on servo control with joystick and foot pedal, control valves, and various hydraulic components.
• Pump Flow Diagram: Diagrams and information on hydraulic pumps and variable flow motors.

Air Pressure System

• Pressure Chart and Function Descriptions: Detailed pressure charts and functional descriptions for models A900, A902, A912, and A922, including component descriptions.

Additional Features

• Wiring Diagrams: Detailed and clear wiring diagrams to aid in electrical troubleshooting and repairs.
• Hydraulic Diagrams: Comprehensive hydraulic diagrams ensuring clear understanding and ease of maintenance.

This service manual is a valuable asset for anyone involved in the maintenance and repair of Liebherr excavators. It not only helps in understanding the intricate details of each model but also ensures that every task, from routine maintenance to complex repairs, is performed accurately and efficiently. Whether you’re a professional mechanic or an equipment owner, this manual is your go-to resource for ensuring the longevity and optimal performance of your Liebherr excavators.