Part of the Hitachi Parts Manuals.
Hunting down a part number for your EX55UR-3? This 254-page Hitachi EX55UR-3 Parts Catalog PDF (OEM #P1BH-1-1) covers the whole hydraulic excavator, from frame and counterweight to the offset boom and bucket. You get exploded views with factory part numbers for every assembly: piston pumps, swing device, control valves, travel motors, pilot piping, wire harnesses, and full undercarriage listings for rubber and steel crawlers. Inside are complete cylinder breakdowns (boom, arm, bucket, blade, offset) down to individual seals, packings, and wiper rings, plus air conditioner components (the system takes a 250 g refrigerant charge). Rebuilding a track adjuster? The idler, roller, and adjuster pages show every pin, bushing, and seal group so you order once. No more squinting at a worn casting for a number. Bookmarked by system; jump straight to the right exploded view, order the part, and get back to digging.
What's Inside This Hitachi EX55UR-3 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Fuel System | Air Cleaner, Fuel Tank, Fuel Piping | |
| Cooling System | Radiator | |
| Engine | Engine Std, Engine Air-Con, Engine Support, Muffler, Oil Cooler Piping, Engine Control, Swing Bearing, Pump;Piston Std | |
| Electrical System | Solenoid Valve, Offset Zero Indicator Lamp, Lamp, Wire Harness, Valve;Solenoid | |
| Hydraulics & 3-Point Hitch | Pump Device Std, Pump Device Air-Con, Pump Device Support, Pilot Valve, Blade Cylinder, Boom Cylinder, Arm Cylinder, Bucket Cylinder, Offset Cylinder, Valve;Control, Valve;Pilot | |
| Loader, Backhoe & Attachments | Swing Device, Offset Boom, Boom Support, Bucket 0.22 _Jis94_, Cyl.;Bucket | |
| Body & Operator Station | Frame, Oil Tank, Canopy, Canopy Parts, Cab, Cab Support, Floor, Floor Mat, Seat Base, Seat, Cover, Under Cover, Track Frame | |
| Decals & Accessories | Tools | |
| Other Components | Counterweight, Main Piping, Control Box, Lever Stand, Control Lever, Control Pedal, Link, Gate Lock Lever, Pilot Piping, Pilot Piping _4 Ports_, Collision Prevention Device, Limit Control Monitor, Auto-Marccino, Controller, Electric Parts, Heater |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Gas Capacity (Air-Conditioner) | 250 g | p. 110 |
Hitachi EX55UR-3 Common Problems This Manual Covers
Hitachi EX55UR-3 boom cylinder seal kit part numbers hard to find, rod seal weeping oil
Check the Boom Cylinder exploded view on page 204; it breaks the assembly into cylinder, piston, bushing, and seal callouts. Cross-reference the Cyl section on page 246 for the packing, wiper ring, O-ring, and back-up ring set, then confirm fitment on page 254, which groups all 4 front cylinders (boom, arm, bucket, offset) on one sheet.
Manual Section: Boom Cylinder p. 204Slow or weak boom and arm response, need suction and return filter part numbers
Start at the Oil Tank exploded view on page 30; the suction filter, return filter, manifold, and level gauge each carry their own callout in the parts list. Grab the pilot filter element from the Pilot Piping (1-1) listing on page 70 in the same order. Verify all 3 elements against your serial number range before buying.
Manual Section: Oil Tank p. 30Steel track links stretched and shoes coming loose, unsure which track-link assembly fits
Check the Track-Link 400G (Steel Crawler) listing on page 172 for the link assembly, pins, bushings, bolts, nuts, and shoes. If tension is the real issue, the Adjuster (Steel Crawler) list on page 164 covers the cylinder assembly, spring, piston rod, and seal. Rubber crawler machines use the shoe assembly on page 170 instead.
Manual Section: Track-Link 400G (Steel Crawler) p. 172Cab air conditioner blowing warm, cannot identify compressor belt and dryer part numbers
Check Air-Conditioner (2-1) on page 110 for the compressor, pulley, tension pulley, and fan belt callouts; the same listing shows the refrigerant gas charge of 250 g to 300 g. Find the condenser, dryer, hoses, and pipe clamps under Air-Conditioner (2-2) on page 112, and match the harness through page 114 if clutch wiring is suspect.
Manual Section: Air-Conditioner (2-1) p. 110Bucket cutting edges and side cutters worn out, replacement part numbers unknown
Check the Bucket 0.22 (JIS94) parts list on page 200; the adapters, cutters, bolts, washers, and nuts each carry separate part numbers for the 0.22 m3 bucket. Count your cutter positions against the exploded view before ordering, and pull the bolt and nut numbers from the same listing rather than reusing stretched hardware.
Manual Section: Bucket 0.22 _Jis94_ p. 200Frequently Asked Questions
What is the replacement specification for the hydraulic suction filter?
The hydraulic suction filter for the EX55UR-3 is part number 4339554. It is located in the oil tank assembly as shown on page 29. p. 30
What is the replacement part number for the main hydraulic return filter?
The return filter element for the hydraulic system is part number 4402914. It is installed within the return filter assembly (item 10) in the oil tank. p. 30
What is the part number for the fuel filter element?
The fuel filter element for the EX55UR-3 is part number 4376643. It is part of the fuel filter assembly (item 01) located in the fuel piping system. p. 20
What is the capacity of the air conditioner gas charge?
The air conditioner system uses two different gas charge sizes depending on the specific component. Part number 4356739 is a 250g gas charge, and part number 4338439 is a 300g gas charge. p. 110
What is the rating of the fusible link in the wire harness?
The wire harness for the EX55UR-3 uses a 65A fusible link, which is part number 4414201. p. 104
What format is this Hitachi EX55UR-3 manual in?
A 254-page Parts Catalog in scanned PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Can I print specific sections of this Hitachi EX55UR-3 Parts Catalog?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
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