Part of the Hitachi Parts Manuals.
Looking for a Hitachi EX8-2B parts catalog PDF straight from the factory? All 161 pages of this OEM catalog (#P1AG-1-2) map the EX8-2B mini excavator part by part, from counterweight bolts to bucket teeth. You get exploded views matched to factory part numbers for the frame, engine mounts, radiator, fuel tank, gear pump, swing device, and the complete boom, arm, and bucket cylinder groups. Piping pages split rigid and expansional frame versions, so you order the right hose, adapter, or O-ring on the first call. Need a side cutter or tooth for the 250, 300, or 350 mm JIS bucket? Each size gets its own breakdown. Guessing part numbers over the phone gets you the wrong box in a week. This bookmarked PDF opens on any device; jump to the section, read your dealer the exact number, and get back to digging.
What's Inside This Hitachi EX8-2B Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Fuel System | Air Cleaner, Fuel Tank | |
| Cooling System | Radiator | |
| Engine | Muffler, Lubricate Piping, Engine Control, Swing Bearing | |
| Electrical System | Electric Parts, Wire Harness, Electrical Socket | |
| Undercarriage & Travel | Travel Device, Front Idler, Lower Roller, Rubber Crawler, Travel Piping | |
| Hydraulics & 3-Point Hitch | Pump Device, Boom Swing Cylinder, Low Pressure Piping, Main Piping (Rigid Frame), Main Piping (Expansional Frame), Span Cylinder, Blade Piping, Blade Cylinder, Front Piping, Boom Cylinder, Arm Cylinder, Bucket Cylinder, Front Piping Protector, Extra Piping, Extra Piping (Std. Arm), Extra Piping (Long Arm) | |
| Loader, Backhoe & Attachments | Swing Device, Swing Post, Swing Lock, Blade, Blade Parts, Boom, Boom Support, Bucket 0.016 (JIS94), Bucket 0.02 (JIS94), Bucket 0.022 (JIS94), Attachment Pedal | |
| Body & Operator Station | Frame, Oil Tank, Control Lever (Expansional Frame), Canopy, Seat, Seat Base, Track Frame | |
| Decals & Accessories | Tools | |
| Other Components | Control Lever, Stay, Bolt Kit, Std. Arm 0.7 M, Std. Arm Support, Long Arm 0.9 M, Long Arm Support, Name-Plate |
Hitachi EX8-2B Common Problems This Manual Covers
Hitachi EX8-2B swing device O-rings hardened like rock, need correct replacement seal part numbers
Check the swing device parts list on page 16, keyed to the exploded view on page 15. Order every O-ring shown for the oil motor at once; hardened seals almost never fail one at a time. While the motor is apart, measure shoe-to-piston play: over 2 mm means you add the piston and shoe components to the order.
Manual Section: Swing Device p. 16Bucket teeth and side cutter part numbers differ between the three bucket sizes
Measure the bucket cutting width before you order anything. Match a 250 mm bucket to the parts list on page 135, a 300 mm bucket to page 137, and a 350 mm bucket to page 139. Each page carries its own bucket, side cutter, and tooth numbers; wear parts do not interchange between sizes.
Manual Section: Bucket 0.02 _Jis94_ (300Mm Wide) p. 137Main piping hoses and O-rings look identical between rigid and expansional frame machines
Verify which frame your machine has before pulling numbers; compare your undercarriage against the track frame listings on page 80 for rigid and page 82 for expansional. Rigid frame main piping runs on pages 26 through 32, expansional frame on pages 34 through 40. Order hoses, adapters, and O-rings only from your frame's set.
Manual Section: Main Piping (1) _Rigid Frame_ p. 26Control levers feel sloppy and worn, unsure which bushings, pins, and shims to order
Inspect each lever pivot for play, then work through the parts lists in order: page 46 covers the stand, lever, and bushings, page 48 the shaft, link, and shims, and page 50 the second lever group. Expansional frame machines add the link and rod parts on page 52. Order bushings and pins as matched pairs.
Manual Section: Control Lever (1-1) p. 46Frequently Asked Questions
What is the part number for the main hydraulic pump on the EX8-2B?
The main gear pump for the excavator is part number 4388267. This component is listed in the Pump Device section on page 14. p. 14
What is the part number for the main fuel filter element?
The main fuel filter element is part number 4376645 for serial numbers up to 003321, and part number 4413286 for serial numbers 003322 and above. These are listed in the Fuel Tank section on page 12. p. 12
What is the part number for the radiator assembly?
The radiator assembly part number is 4388407 for units up to serial number 003483, and 4414285 for units with serial number 003484 and above. These details are found in the Radiator section on page 6. p. 6
What is the part number for the air cleaner assembly?
The air cleaner assembly is part number 4388258. This part is listed in the Air Cleaner section on page 8. p. 8
Is this Hitachi EX8-2B Parts Catalog a digital download?
You get a 161-page scanned PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Are there any print restrictions on this Hitachi EX8-2B 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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