Part of the Hitachi Repair Manuals.
Wrenching on a Hitachi ZAXIS450 or ZAXIS460LCH? This 628-page workshop manual PDF (OEM #W16J-E-01) covers the whole family: 450, 450H, 450LC, 450LCH, and 460LCH hydraulic excavators, cab to track frame. Inside: step-by-step disassembly and reassembly for the pump device, control valve, swing device, and travel unit, plus full sections on boom, arm, and bucket cylinders and the complete engine, from fuel and cooling down to the turbocharger. You get factory torque values and component weights for every major job, so nothing gets guessed. Torque the 19 mm center joint hose to 29.5 N-m and the 41 mm to 205 N-m, then plan your rigging around the 35 kg pump front casing. Forum threads won't give you those numbers. Bookmarked chapters and a real text layer mean you type a spec, jump to the page, and get back to wrenching.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Workshop Manual | 1 | |
| Introduction | 2-3 | Additional References, Manual Composition, Page Number, Safety Alert Symbol, Units Used |
| Safety | 4-33 | Safety Information, Signal Words, Safety Instructions, Emergency Procedures, Protective Clothing, Machine Inspection, Cab Precautions, Handholds and Steps |
| General Information | 34-61 | Precautions for Disassembling and Assembling |
| Upperstructure | 62-237 | Cab, Pump Device, Control Valve, Swing Device |
| Undercarriage | 238-341 | Travel Device |
| Front Attachment | 342-381 | Hydraulic Circuit Pressure Release, Boom Cylinder, Arm Cylinder, Bucket Cylinder, Bushing, Side Cutter, Point, Arm and Bucket Connection |
| Engine and Accessory | 382-628 | Engine Mechanical, Engine Cooling, Engine Fuel, Starting and Charging, Engine Lubrication, Engine Induction |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hexagon wrench size for hydraulic oil tank cap | 4 mm | p. 58 |
| Air filter installation torque | 4.9 N·m (0.5 kgf·m, 3.6 lbf·ft) | p. 68 |
| Center joint hose connection torque (19 mm) | 29.5 N·m | p. 90 |
| Front casing weight | 35 kg (77 lb) | p. 102 |
| Sensor A (86) installation bolt torque (5 mm) | 9.8 N·m (1.0 kgf·m, 7.2 lbf·ft) | p. 110 |
| Sensor A (86) installation bolt torque (6 mm) | 29.4 N·m (3.0 kgf·m, 21.5 lbf·ft) | p. 110 |
| Cylinder head bolt M18 torque | 177 N·m (130 lb ft) -> 245 N·m (181 lb ft) -> 60° to 90° | p. 404 |
| Fuel filter replacement turn | 2/3 of a turn | p. 423 |
| Fuel Filter torque | 52 N·m | p. 441 |
| M18 bolt torque 1st step | 177 N·m | p. 459 |
| Clearance between impeller and pump body | 1.7 - 2.7 mm (0.0669 - 0.1063 in.) | p. 546 |
| Tightening torque for front cover bolt | 28 N·m (2.8 kgm) | p. 186 |
