Hitachi EX55UR Parts List • Publication PIBG-EI-2

Hitachi EX55UR Equipment Components Parts Catalog

This official 164-page parts catalog (publication PIBG-EI-2) gives technicians and DIY mechanics the precise schematics needed to identify internal components for the Hitachi EX55UR hydraulic mini excavator (covering serial numbers 000101 and up). Because working on high-pressure hydraulics carries inherent physical risks, verifying the exact factory part numbers and component orientation is a critical step before depressurizing or servicing any machine system.

Whether you are tearing down a multi-section control valve or simply cross-referencing a seal kit, this manual takes the guesswork out of your daily shop routine. It delivers the precise identification data required to order the right items the first time and keep your repair jobs moving.

Digital Delivery & Shop Features

• Available as an instant download directly to your device the moment payment clears.
• Includes 92 exploded-view assemblies to help you visualize complex internal structures before ordering parts.
• Fully indexed PDF format allows for rapid, shop-floor keyword searches across every chapter and appendix.
• Print exactly what you need without DRM restrictions, allowing you to discard greasy pages after the job is done.
• Your file remains securely backed up in your account for easy retrieval if a shop laptop crashes.

Hydraulic System & Control Specifications The catalog provides a deep dive into the internal architecture of primary piston pumps and control valves. Every diagram links straight to comprehensive lists detailing part identification, reference item numbers, and standard hardware quantities.

You will find clear breakdown details for multi-stage relief valves, including specific housing and poppet configurations. Need to check adjustment shims? The assembly overview for relief valve 4345830 maps out the required shim stacks for accurate pressure regulation. It also specifies exact part details for routine internal maintenance, such as the 4345903 piston pump seal kit.