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Part of the Hitachi Parts Manuals.
Every bolt, bushing, and O-ring on your EX30 lives somewhere in this 298-page Hitachi EX30 parts manual PDF, the factory parts catalog for the mini excavator. Open to any section and you get exploded views paired with OEM part numbers for the whole machine: engine mounts, piston pump, swing device, control valves, track frame, and cab hardware down to the door glass and weather-strip. Undercarriage coverage runs from front idlers and rollers to steel and rubber crawler track links, plus bucket options from the 300mm to the 600mm width. Cylinder pages break out tube, rod, head, and complete seal kits, so you order the right kit instead of guessing at ring sizes. No more squinting at worn casting numbers with a flashlight. Bookmarked for quick jumps; load it on your tablet and walk the parts counter through exactly what you need.
What's Inside This Hitachi EX30 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Fuel System | Air Cleaner, Fuel Pipings | |
| Cooling System | Radiator, Radiator Support, Reserve Tank | |
| Engine | Muffler, Oil Cooler Pipings, Lubricate Pipings, Pump;Piston | |
| Electrical System | Gauge Panel _Canopy_, Gauge Panel _Canopy, Cab_, Gauge Panel Auto-Idle_ _Canopy_, Gauge Panel _Cab_, Wire Harness, Valve;Solenoid | |
| Hydraulics & 3-Point Hitch | Pump Device, Cylinder Cover, Extra Pipings _Hydraulic Ports_, Valve;Control, Valve;Pilot | |
| Body & Operator Station | Frame, Tank, Console _Canopy_, Console _Cab_, Canopy, Floor, Seat, Cover, Track Frame, Travel Pipings Cover, Cab Ass'Y, Cab, Cab _Window Washer_, Engine Cover Guard | |
| Decals & Accessories | Tool | |
| Other Components | Counterweight, Engine, Swing Device, Swing Post, Main Pipings, Engine Control, Control Lever, Control Pedal, Lever Lock, Swing Lock, Lever Link Support, Lever Link, Pilot Pipings, Electlic Parts, Travel Device, Front Idler |
Hitachi EX30 Common Problems This Manual Covers
Hitachi EX30 hydraulic pump leaking at the coupling, need oil seal and shim part numbers
Check the Pump Device exploded view on page 23 and match your leak point to the parts list on page 24, which covers the piston pump, coupling, oil seal, and shims. Pumps pushing past 2,000 hours often need the internal seal groups too; those pieces are broken out on pages 256 and 258.
Manual Section: Pump Device p. 24Machine overheats under load in summer, need radiator core and hose part numbers
Verify which parts you need against the Radiator assembly list on page 8: core, cap, fan guide, oil cooler, and packing are all itemized there. Grab the water hoses and clamps from the Radiator Support list on page 10, and the reserve tank pieces on page 12. Replace everything at once if the coolant warning trips above 95 C.
Manual Section: Radiator p. 8Track keeps slipping and tensioner weeps oil, not sure which adjuster assembly to order
Measure your shoe width before ordering track parts: 300 mm shoes match the Track-Link 300G list on page 156, 400 mm shoes the 400G and 400A lists on pages 218 and 220. For the leaking tensioner, steel crawler machines take the adjuster assembly on page 150; rubber crawler machines take the one on page 224.
Manual Section: Adjuster (Steel Crawler) p. 150Bucket teeth and side cutters worn out, which parts list matches my bucket width
Measure your bucket width across the cutting edge before ordering; the standard 0.08 m3 bucket is 520 mm wide and its tooth, cutter, and boss parts are listed on page 174. Narrower buckets have their own lists: 300 mm on page 232, 350 mm on page 234, 450 mm on page 236, and 600 mm on page 238.
Manual Section: Bucket 0.08 (520Mm Wide) p. 174Boom cylinder rod weeping, can't find the right seal kit for my serial range
Check the boom cylinder exploded view on page 289; the seal kit, wiper ring, cylinder head, and piston rod are itemized on page 290. Verify the arm cylinder separately on pages 291 and 292 since the kits differ. On machines over 15 years old, note every part number before calling your dealer; substitutions are common.
Manual Section: Cylinder; Boom p. 289Frequently Asked Questions
What are the replacement specifications for Hydraulic pump seals?
The hydraulic pump (piston type) uses a specific oil seal with part number 0429722 for the pump body assembly. For detailed replacement, refer to the PUMP;PISTON (1/2) section on page 256. p. 256
What are the replacement specifications for the Radiator core?
The radiator core for the EX30 excavator is identified by part number 4294854. It is a component of the radiator assembly (part number 4268251) and is listed in the RADIATOR section on page 8. p. 8
What is the part number for the main engine fan belt?
The main engine fan belt for the EX30 excavator is part number 4294843. This part is listed under the ENGINE section on page 6. p. 6
What is the part number for the fuel filter element?
The fuel filter element for the EX30 excavator is part number 4313065. This part is listed in the FUEL PIPINGS section on page 20. p. 20
What is the part number for the main hydraulic pump?
The main piston pump for the EX30 excavator is part number 4266820. This is listed in the PUMP DEVICE section on page 24. p. 24
How quickly can I access this Hitachi EX30 manual after buying?
Instant PDF download. You get the full 298-page scanned Parts Manual immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Am I able to print pages from this Hitachi EX30 manual?
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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