Hitachi Zaxis 40U-2 50U-2 Excavator Workshop Manual – PDF Download (W1M9-E-00)

Description

Hitachi Zaxis 40U-2 50U-2 Excavator Workshop Manual — Vol. No. W1M9-E-00

File Details

• Manual Type: Workshop Manual
• Models Covered: Hitachi Zaxis 40U-2, Zaxis 50U-2 Excavators
• Vol. No.: W1M9-E-00
• Manual No.: KM-1M9-E
• Publisher: Hitachi Construction Machinery Co., Ltd., Tokyo, Japan
• Publication Date: 2004.11 (Printed in Singapore)
• Language: English
• Pages: 564
• File Format: PDF

What This Manual Covers

This Hitachi Zaxis 40U-2 50U-2 Workshop Manual is the dedicated repair volume of the two-volume KM-1M9-E service manual set. While the companion Technical Manual (Vol. No. T1M9-E) handles systems theory, operational testing, and troubleshooting, this Workshop Manual focuses exclusively on the hands-on work: the tools, maintenance standards, removal and installation sequences, and disassembly and assembly procedures needed to fully rebuild or repair each major assembly on the machine. It is written for experienced technicians and provides the technical depth a shop-level overhaul demands.

Chapters Covered

• Section 1 — General Information
  • Group 1: Precautions for Disassembling and Assembling — shop cleanliness, inspection records, bleeding procedures for hydraulic pump, swing motor, travel motor, and cylinders; floating seal handling; nylon sling precautions
  • Group 2: Tightening — torque specifications for Hexagon T, H, and M bolts and socket bolts (M8 through M36); piping joint tightening for union joints, pipe joints, O-ring seal joints, quick couplers, screw-in connections; low-pressure hose clamp torques; hose connection guidelines; periodic replacement intervals for all hydraulic and engine hoses and rubber mounts
  • Group 3: Painting — painting colors and surfaces for upperstructure, undercarriage, and front attachment (TAXI yellow, Dark gray SP-424, Black, N-10)
  • Group 4: Bleeding Air — procedure for bleeding air from the hydraulic oil tank using a vacuum pump
  • Group 5: Floor-Tilting Device — operation, floor tilting-up and tilting-down procedures for canopy and cab configurations (2-pillar and 4-pillar)
• Section 2 — Upperstructure
  • Group 1: Canopy — remove and install
  • Group 2: Counterweight — remove and install (ZAXIS40U-2: 351 kg / 780 lb; ZAXIS50U-2: 675 kg / 1,490 lb)
  • Group 3: Pump Device — remove, install, disassemble (with full exploded-view diagram of all 48 components), assemble, maintenance standards
  • Group 4: Control Valve — remove and install; disassemble/assemble body; remove/install relief valve and make-up valve; disassemble unload section; control valve layout details
  • Group 5: Swing Device — disassembly and assembly procedures
  • Group 6: Pilot Valve — remove and install front, travel, and blade pilot valves; boom swing pilot valve; disassemble and assemble front pilot valve; disassemble and assemble travel pilot valve; disassemble/assemble pilot valves for boom swing, blade, and auxiliary
  • Group 7: Solenoid Valve — remove and install 2-unit solenoid valve; disassemble 2-unit solenoid valve
  • Group 8: Revolution Sensing Valve
  • Group 9: Auxiliary Flow Selector Valve (Optional)
• Section 3 — Undercarriage
  • Group 1: Swing Bearing — remove and install (swing bearing weight: 59 kg / 130 lb)
  • Group 2: Travel Device — disassembly and assembly with detailed cross-section diagram; 85-component parts list including planetary gears, counterbalance valve, brake valve
  • Group 3: Center Joint — disassembly and assembly
  • Group 4: Track Adjuster
  • Group 5: Front Idler
  • Group 6: Upper and Lower Roller — disassemble and assemble
  • Group 7: Track
• Section 4 — Front Attachment
  • Group 1: Front Attachment — removal, installation, and related procedures
  • Group 2: Cylinder — disassembly and assembly of boom, arm, bucket, and swing cylinders
• Section 5 — Engine and Accessory
  • Engine nomenclature, specifications, and external views for the Yanmar 4TNV94L (4-cylinder, 94 × 110 mm bore/stroke, 3.054 L displacement, direct injection, water-cooled diesel)
  • Structural description and exhaust emission regulation information
  • Periodic maintenance schedule and step-by-step inspection procedures (50-hour, 250-hour, 500-hour, 1000-hour, 2000-hour intervals)
  • Fuel, lubricating oil, and cooling water specifications; applicable fuel (Diesel oil ISO 8217 DMA, BS 2869 A1/A2, Cetane No. 45 min.) and lubricant (API grade CD or CF) grades
  • Engine body: cylinder head disassembly and reassembly; valve clearance inspection and adjustment; fuel injection nozzle pressure inspection and spray pattern check; fuel injection timing adjustment; crankshaft, bearing, and piston inspection
  • Lubrication system: trochoid pump components, disassembly, servicing points, parts inspection and measurement
  • Cooling system: cooling water pump components and disassembly
  • Starting motor procedures: for 4TNV94L/98 (specifications, components, troubleshooting, disassembly, inspection, service standards, assembly, characteristic test)
  • Alternator: 40A alternator components, specifications, and wiring diagram
  • Electric wiring diagram and precautions
  • Service standards: engine tuning data, engine body clearances and wear limits, lubricating oil system standards, tightening torques for all bolts and nuts

Taken together, this Hitachi Zaxis 40U-2 and 50U-2 Workshop Manual gives a technician every procedure needed to strip and rebuild these compact excavators from the ground up — from bleeding hydraulic circuits correctly before start-up, to torquing a counterweight bolt to the exact specification, to adjusting valve clearances and fuel injection timing on the 4TNV94L engine. The document bridges the full gap between symptom (covered in the Technical Manual) and resolution, delivering the step-by-step sequences, component drawings, and tolerance tables that make correct reassembly possible.

What You Can Do With This Manual

With the Hitachi Zaxis 40U-2 50U-2 Workshop Manual (W1M9-E-00) in hand, a qualified technician can perform pump device overhauls using the detailed exploded-view diagrams, rebuild travel motors and swing devices to manufacturer clearance specifications, replace and correctly torque control valve and pilot valve assemblies, service the Yanmar 4TNV94L engine through every scheduled maintenance interval, and carry out full undercarriage rebuilds covering swing bearings, center joints, idlers, rollers, and tracks. Having the correct specifications and sequences — not best guesses — is what separates a repair that holds from one that comes back. Every torque value, every hose replacement interval, every reassembly caution in this document exists to protect the machine and the technician working on it.

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