990 Tractor Systems Overview

Product Overview

The 990 series tractors are equipped with advanced features designed to enhance agricultural and industrial functionality. These tractors are powered by durable engines and incorporate cutting-edge axles and steering components for improved performance and reliability.

Front Axle and Steering

The front axle and steering mechanisms are integral to the tractor’s maneuverability and stability. This section provides detailed information on:

• Front Wheel Alignment: Ensures optimal handling and tire life.
• Front Hubs: Key components in wheel attachment.
• Stub Axles: Supports front wheels and allows for steering.
• Front Axle: A crucial element in supporting the front part of the tractor.
• Steering Box: Transfers driver input to the steering linkage effectively.

Power Assisted Steering

• Operation: Describes how power assistance reduces steering effort.
• Maintenance and Services: Tips for maintaining efficiency and functionality.
• Fault Finding: Common issues and diagnostic procedures.
• Repair Operations: Steps for repairing steering components.

Hydrostatic Power Steering

• Operation: Explanation of hydrostatic power steering functionality.
• Operation of Servo Valve: Details on managing hydraulic flow for smooth operation.
• Maintenance and Service: Guidelines for upkeep to ensure longevity.
• Fault Finding: Identifying and resolving common hydrostatic steering issues.
• Repair Operations: Instructions for correcting steering problems.

Engine Details

Agricultural Tractors: The 990 agricultural models utilize the A04/47 engine, known for its robust four-cylinder setup with a bore of 3 inches and a stroke of 4u00bd inches. These engines employ wet cylinder sleeves and are designed for compatibility with both live and non-live drive clutches, denoted by suffixes A or B.

Industrial Tractors: The 990 industrial variants feature the 104/47 engine, sharing similarities with the A04/47, but customized with a twin-plate clutch flywheel and specialized splined coupling flange.