Part of the Hitachi Repair Manuals.
This 388-page Hitachi excavator workshop manual pdf (OEM #KM-584E-00) covers the EX20UR-2, EX30UR-2, and EX40UR-2 family from upperstructure down to undercarriage. Open it and you get full exploded views of the pump device, control valve, swing device, and travel device, plus a dedicated clearances section for bearings and rollers you'd otherwise be eyeballing with a feeler gauge and a guess. Inside: a complete Engine and Accessories section covering lubrication, cooling, and fuel systems, backed by a troubleshooting chart for chasing engine faults instead of throwing parts at the problem. Torque the 19 mm pipe union to 29 N-m and set the pump mounting bolts to 88 N-m before you seal the housing back up. Nobody wants to strip a fitting because a forum post guessed wrong. Bookmarked by section and searchable by keyword, so you jump straight to Group 03 or Group 06 without flipping through 388 pages by hand.
Complete the set for your EX20/30/40 UR-2 Series
- Parts Catalog: Hitachi EX30UR-2 Parts Catalog
- Parts Catalog: Hitachi EX40UR-2 Excavator Parts Catalog
- Parts Catalog: Hitachi EX20UR-2 Parts Catalog
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 6-19 | Precautions for Disassembly and Assembly, Tightening Torques |
| Upperstructure | 20-156 | Canopy, Counterweight, Pump Device, Control Valve, Swing Device, Pilot Valve, Shockless Valve |
| Undercarriage | 157-254 | Swing Bearing, Travel Device, Center Joint, Track Adjuster, Front Idler, Upper and Lower Rollers |
| Front Attachment | 255-296 | Boom and Arm Assembly, Cylinders |
| Engine and Accessories | 297-388 | Engine, Lubricating System, Cooling System, Fuel System, Troubleshooting |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Pipe Thread Connection / Union Joint Tightening Torque Specifications | 19 mm: 29 N-m (3.0 kgf-m, 22 lbf·ft) | p. 17 |
| O-ring Seal Joint Tightening Torque | 27 mm: 93 N-m (9.5 kgf-m, 69 lbf·ft) | p. 17 |
| Pump mounting bolts torque | 88 N-m (9 kgf-m, 65 lbf·ft) | p. 13 |
| Main pump delivery hoses torque | 39 N·m (4 kgf·m, 29 lbf·ft) | p. 12 |
| Air bleed plug tightening torque | 64 N·m (6.5 kgf·m, 47 lbf·ft) | p. 72 |
| Control valve mounting bolts torque | 49 N·m (5 kgf·m, 36 lbf·ft) | p. 71 |
| Hose connection tightening torque (19 mm) | 29 N·m (3 kgf·m, 22 lbf·ft) | p. 71 |
| Hose connection tightening torque (22 mm) | 39 N·m (4 kgf·m, 29 lbf·ft) | p. 71 |
| Tighten plug (30) into body (1) (EX30UR-2, EX40UR-2) | 34+4.9 N-m (3.5+0.5 kgf·m, 25+3.6 lbf·ft) | p. 82 |
| EX30UR-2 | ||
| Hydraulic oil capacity | 42 L (11.1 US gal) | p. 95 |
| 3KC1 | ||
| Clearance between small end pin hole and piston pin (3KC1) | 0.020~0.041 (mm) | p. 344 |
| 3KR2 | ||
| Clearance between small end pin hole and piston pin (3KR2) | 0.008~0.020 (mm) | p. 344 |
