Part of the Hitachi Parts Manuals.
Whether you are rebuilding the swing motor or replacing worn track links, this 258-page Hitachi EX45 parts catalog PDF (OEM #P1BD-1-1) breaks down every single component on your excavator. Open to any section and you get highly detailed exploded views covering the entire chassis, engine, cab, and hydraulic systems. Packed with clear component identification, you will see exactly how the main piston pump goes together and find the precise numbers for every O-ring, bushing, and seal. Verify the correct master pin for the 400G steel crawler track assembly, or pull the exact part number for the 660mm wide bucket side cutter before calling the dealer. Stop ordering the wrong components based on bad aftermarket diagrams. Download this bookmarked file directly to your tablet, walk right up to your machine, and start building your parts order.
What's Inside This Hitachi EX45 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, Valve;Solenoid | |
| Hydraulics & 3-Point Hitch | Pump Device, Extra Pipings _Hydraulic Ports_, Valve;Relief, Valve;Control, Valve;Pilot | |
| Body & Operator Station | Frame, Tank, Blade Control Cable, Console _Canopy_, Console _Cab_, Cover, Track Frame, Travel Pipings Cover, Cab, Cab _Window Washer_ | |
| Decals & Accessories | Tool | |
| Other Components | Counterweight, Engine, Swing Device, Swing Post, Main Pipings, Engine Control, Control Lever, Control Pedal, Lever Link, Pilot Pipings, Electric Parts, Travel Device, Front Idler, Adjuster, Upper Roller, Lower Roller |
Hitachi EX45 Common Problems This Manual Covers
Hitachi EX45 bucket cylinder packing fails and leaks hydraulic fluid during heavy lifting operations.
Check the bucket cylinder exploded view on page 254. Identify the correct packing and wiper ring numbers for a 0.14 capacity bucket setup. Cross-reference the rod, head, and piston part numbers with your machine's serial number to ensure exact fitment.
Manual Section: Cyl.;Bucket p. 254Worn side cutters and missing bucket hardware after digging in rocky soil conditions.
View the bucket assembly breakdown on page 158. Identify the correct side cutter, boss, and shim part numbers for the 660 mm wide bucket. Count the exact number of bolts, nuts, and spring washers required to mount the new hardware.
Manual Section: Bucket 0.14 (660Mm Wide) p. 158Narrow trenching bucket side cutters are heavily worn and missing the primary mounting hardware.
Check the bucket assembly parts list on page 204. Locate the specific side cutter and boss part numbers for the 450 mm wide bucket. Match the required bolts, nuts, and spring washers to ensure a secure fit before final assembly.
Manual Section: Bucket 0.09 (450Mm Wide) p. 204Large capacity bucket missing side cutters and spring washers after prolonged trenching operations.
Review the bucket parts diagram on page 208. Find the exact part numbers for the side cutter and boss designed for the 700 mm wide bucket. Order the necessary bolts, nuts, and shims to completely rebuild the entire bucket assembly.
Manual Section: Bucket 0.14 (700Mm Wide) p. 208Frequently Asked Questions
What is the part number for the main frame of the Hitachi EX45?
The main frame for the Hitachi EX45 is identified by part number 5003485. p. 2
What is the part number for the fan belt on the Hitachi EX45 engine?
The fan belt for the engine is part number 4307279. p. 6
What is the part number for the radiator core on the Hitachi EX45?
The radiator core for the Hitachi EX45 is part number 4307282. p. 8
What is the part number for the air cleaner element on the Hitachi EX45?
The air cleaner element for the Hitachi EX45 is part number 4294846. p. 14
What is the part number for the fuel filter element on the Hitachi EX45?
The fuel filter element for the Hitachi EX45 is part number 4307281. p. 18
What format is this Hitachi EX45 manual in?
Instant PDF download. You get the full 258-page scanned Parts Catalog immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Is this Hitachi EX45 Parts Catalog printable?
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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