Hitachi EX20UR-2 / EX30UR-2 / EX40UR-2 Excavator Workshop Manual

Technical Scope and Coverage

• Built for owners and professional workshops servicing the Hitachi EX20UR-2, EX30UR-2, and EX40UR-2 excavator line, spanning canopy, upperstructure, and undercarriage systems
• Official OEM publication KM-584E-00 / W584E-00, published 1994 by Hitachi Construction Machinery Co., Ltd
• Contains 46 detailed exploded-view diagrams illustrating component assemblies and 14 torque-specification tables for fastening precision
• Downloads to your account within seconds of checkout
• Re-download the file any time, no expiration
• Print resolution preserves exploded-view detail
• Full-text search finds any part number in seconds
• Suitable for printing individual sections for shop-floor use
• This 1994 technical documentation provides the original build-standard for these three Hitachi excavator models, serving as the master reference for all major hydraulic and mechanical assembly points

Component and System Documentation

The Hitachi EX20UR-2, EX30UR-2, and EX40UR-2 workshop manual structures information by critical equipment section, facilitating efficient navigation through the upperstructure and undercarriage assemblies. Content focuses on assembly and disassembly sequences for key components, including the pump device, swing device, and control valve configurations. Each chapter presents specific exploded diagrams that identify internal components like spools, valve plates, needle bearings, and planetary gear sets to ensure accurate reassembly. The technical documentation avoids generic descriptions in favor of model-specific data mapping, highlighting the mechanical variances between the three units for improved service accuracy.

Specification and Reference Values

Specifications provided within the Hitachi EX20UR-2, EX30UR-2, and EX40UR-2 technical manual offer precise metrics for maintenance and assembly. The torque specification table lists 109 N·m for swing bearing mounting bolts across the series. Hydraulic tank capacity for the Hitachi EX30UR-2 is documented at 42 liters. The swing device weight for the Hitachi EX30UR-2 is specified at 27 kg. For what an OEM service publication covers, users can reference these data tables to confirm load capacities, fluid fill levels, and bolt tightening requirements. Reference only — always consult a certified technician before performing service on this equipment. This official 388-page Hitachi OEM workshop manual documents the EX20UR-2, EX30UR-2, and EX40UR-2 excavators, detailing component removal, installation, and critical assembly specifications for the primary hydraulic and mechanical systems.