Part of the Hitachi Parts Manuals.
Need to track down every component for your Hitachi EX8-2 Hydraulic Excavator? This 180-page Hitachi EX8-2 parts catalog PDF (OEM #P1A1-1-1) breaks down the complete machine from the track frame to the boom assembly. Inside, you get highly detailed exploded views with full cross-references for the engine, main hydraulic pipings, and travel device. Open up to page after page of factory illustrations showing exactly how the gear pump, control valves, and arm cylinders fit together. Identify the exact replacement oil seal for the main gear pump, or verify the correct bushing and pin part numbers before rebuilding the 340mm wide bucket. Ordering the wrong component costs you days of downtime. Download this text-searchable file, jump right to the section you need using the bookmarks, and get your parts order right the first time.
What's Inside This Hitachi EX8-2 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Fuel System | Air Cleaner, Fuel Pipings, Fuel Tank | |
| Cooling System | Radiator, Radiator Support | |
| Engine | Muffler, Lubricate Pipings | |
| Electrical System | Wire Harness | |
| Hydraulics & 3-Point Hitch | Pump Device, Pump;Gear, Valve;Control, Valve-Block | |
| Body & Operator Station | Frame, Oil Tank, Floor, Seat, Cover, Track Frame, Travel Pipings Cover, Canopy, Pt-Cover | |
| Other Components | Counterweight, Engine, Swing Device, Swing Post, Low Pressure Pipings, Main Pipings, Engine Control, Control Lever, Control Pedal, Lever Lock, Swing Lock, Lever Link Support, Lever Link, Control Box, Electric Parts, Travel Device |
Hitachi EX8-2 Common Problems This Manual Covers
Hitachi EX8-2 bucket drifting down when controls are neutral due to worn seals
Check the bucket cylinder exploded view on page 176. Verify if your machine uses the standard 340mm wide bucket shown on page 114. Match your cylinder tube and rod to the parts list to find the correct packing and O-ring numbers before ordering 1 complete seal kit.
Manual Section: Cyl.;Bucket p. 176Machine pulling to one side and lower track rollers are completely worn out
Inspect the lower roller exploded view on page 96. Identify the exact shaft, ball bearing, and seal part numbers for your undercarriage. Verify the required quantity of 1 retaining ring per roller assembly before matching the components to your track frame layout on page 88.
Manual Section: Lower Roller p. 96No hydraulic movement or very weak digging response and hydraulic oil runs hot
Review the oil tank breakdown on page 26. Locate the part numbers for both the suction filter and return filter assemblies. Check the level gauge components to ensure proper fluid measurement, then order exactly 1 of each filter element to restore proper hydraulic flow.
Manual Section: Oil Tank p. 26Travel motor lacks power on inclines and leaking fluid from the final drive
Locate the travel device parts diagram on page 90. Identify the correct travel motor assembly and sprocket part numbers. Proceed to the oil motor breakdown on page 142 to find the specific seal ring and thrust collar numbers required for the 2 travel drive units.
Manual Section: Travel Device p. 90Frequently Asked Questions
What are the replacement specifications for hydraulic filters?
The suction filter assembly for the oil tank is part number 4294125, which includes the suction filter (4272366) and O-ring (A810070). The return filter is part number 4272370, which includes the cartridge element (4294126) and O-ring (A810025). p. 26
What is the part number for the engine fan belt?
The fan belt for the engine is part number 4294837. p. 6
What is the part number for the engine oil filter?
The engine oil filter is part number 4294838. p. 6
What is the part number for the radiator cap?
The radiator cap is part number 4296475. p. 8
What is the part number for the starter switch key?
The starter switch key is part number 4187759, which is supplied as a set of two pieces. p. 76
What format is this Hitachi EX8-2 manual in?
A 180-page Parts Catalog in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Can I print this Hitachi EX8-2 manual?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
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