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Part of the Hitachi Parts Manuals.
Every part on your Hitachi EX25 excavator is mapped somewhere in this 292-page parts catalog PDF (OEM #P1AB-1-4), from the swing post pins to the last O-ring in the pilot valve. You get exploded views matched to factory part numbers for the frame, counterweight, engine, radiator, pump device, swing components, control levers, and the complete cab and canopy hardware. A separate equipment components section strips the gear pump, oil motors, control valves, and the boom, arm, bucket, and blade cylinders down to individual seals, springs, and spools. Picking a bucket? The catalog identifies the 0.035 (300 mm), 0.042 (350 mm), 0.07 (480 mm), and 0.075 (550 mm) options, plus steel and rubber crawler variants. Ordering the wrong pin twice costs you a week of downtime. Bookmarked with a live text layer; type the part name, land on the diagram, order once.
What's Inside This Hitachi EX25 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Fuel System | Air Cleaner, Fuel Pipings | |
| Cooling System | Radiator, Radiator Support, Reserve Tank | |
| Engine | Muffler, Oil Cooler Pipings, Engine Control, Lubricate Pipings, Engine Cover Guard | |
| Electrical System | Gauge Panel _Canopy_, Gauge Panel _Canopy, Cab_, Wire Harness, Valve;Solenoid | |
| Hydraulics & 3-Point Hitch | Pump Device, Extra Pipings _Hydraulic Ports_, Pump;Gear, Valve;Control, Valve;Pilot | |
| Loader, Backhoe & Attachments | Swing Device, Swing Post, Swing Lock, Boom, Bucket 0.07, Bucket 0.035, Bucket 0.042, Bucket 0.075, Cyl.;Boom, Cyl.;Bucket | |
| 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_ | |
| Decals & Accessories | Tool | |
| Other Components | Counterweight, Main Pipings, Control Lever, Control Pedal, Lever Lock, Lever Link Support, Lever Link, Pilot Pipings, Electric Parts, Travel Device, Front Idler, Adjuster, Lower Roller, Track-Link 300G, Crawler Guide, Center Joint |
Hitachi EX25 Common Problems This Manual Covers
Hitachi EX25 bucket teeth and side cutters look identical across sizes, can't match parts to my bucket
Measure your bucket width at the cutting edge first. The 480 mm bucket teeth and side cutters are listed on page 161, the 300 mm on page 215, the 350 mm on page 217, and the 550 mm on page 219. Match tooth, side cutter, and shim callouts to the exploded view before ordering.
Manual Section: Bucket 0.07 (480Mm Wide) p. 161Boom cylinder weeping at the rod, not sure which seal kit fits canopy versus cab machines
Check the boom cylinder exploded view on page 283 for canopy machines and page 285 for cab machines; the seal kit is a separate line item under each cylinder assembly. Measure the rod diameter in millimeters and confirm your serial number range in the parts list, since canopy and cab cylinders take different kits.
Manual Section: Cyl.;Boom (Canopy) p. 283Need the correct steel track link assembly, shoes are worn and pitch is hard to identify
Verify shoe width before pulling numbers. The 300 mm steel track link assembly is on page 143, and the 400 mm versions are on pages 203 and 205, listed with link, shoe, bushing, pin, and master pin items. Rubber crawler machines use the one-piece shoe assembly shown on page 207 instead.
Manual Section: Track-Link 300G (Steel Crawler) p. 143Pilot line filter element keeps clogging, parts counter can't identify the element from the housing alone
Check the pilot pipings breakdown on page 79, where the filter body and element carry separate item numbers alongside the tee, plug, and adapter fittings. Measure the old element's length and outside diameter in millimeters against the parts list callouts, and order fresh O-rings with the element while you are at it.
Manual Section: Pilot Pipings (1-1) p. 79Gear pump leaking at the coupling, want just the drive oil seal instead of a complete pump
Inspect the pump device exploded view on page 24 first; it shows the gear pump, coupling, and oil seal as separate items. Cross-reference the full gear pump breakdown on page 239 for the flange, housing, seal, and bushing lines. Measure the shaft diameter in millimeters to confirm the seal against the parts list.
Manual Section: Pump Device p. 24Frequently Asked Questions
What are the replacement specifications for the hydraulic pump drive seal?
The hydraulic pump drive seal is part of the pump device assembly. The part number for the oil seal is 4275847, as listed in the PUMP DEVICE section on page 24. p. 24
What are the replacement specifications for the boom cylinder seal kit?
The seal kit for the boom cylinder (canopy version) is part number 4305787. This kit contains all necessary seals for the cylinder assembly, as detailed on page 283. p. 283
What is the part number for the fan belt on the EX25 engine?
The fan belt for the engine is part number 4294843. It is listed under the ENGINE section on page 6. p. 6
What is the part number for the fuel filter element on the EX25?
For serial numbers 00175 and higher, the fuel filter element is part number 4313065. For earlier models, the fuel filter is part number 4296544. p. 20
What is the part number for the main frame of the EX25?
The main frame of the excavator is part number 5003520, as shown in the FRAME section on page 2. p. 2
How quickly can I access this Hitachi EX25 manual after buying?
Immediate download of the complete 292-page searchable Parts Catalog. Access it on any device, from a laptop at your desk to a phone in the field.
Are there any print restrictions on this Hitachi EX25 manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
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