Hitachi 4HK1 Engine Manual / Workshop Manual (Part No. EWDCA-EN-01)
This workshop manual covers the Hitachi 4HK1 engine in its Interim Tier 4 compatible configuration. It is intended for technicians and service engineers who need clear, practical guidance during maintenance, repair, and diagnostic work. The content focuses on real workshop tasks rather than theory, making it suitable for both routine servicing and deeper mechanical intervention.
Item Details
- Title: Engine Manual / Workshop Manual
- Engine: 4HK1 (Interim Tier 4 Compatible)
- Part Number: EWDCA-EN-01
- Main Manual Size: 626 pages
- Additional Diagram File: 18 pages (PDF)
- Document / Platform Code: IDE-2620H
- Language: English
- Format: Digital manuals (PDF)
Together, these files form a complete service reference set. The main manual explains procedures and components in detail, while the separate diagram file provides clean, full-page schematics for electrical and hydraulic systems that are easier to follow when tracing circuits or checking harness connections.
Main Workshop Manual Content
The primary manual is structured in a logical order: safety and general service information first, followed by system-based sections for the 4HK1 engine. Each section focuses on individual components, with supplementary notes where additional clarification is needed.
0) Introduction (All)
- Introduction
- Safety information
14A) Service Information Guide (All)
- Contents included in service information
- Plastic gauge
- Recommended liquid gasket
- Thread locking adhesive agent
- Terms
- Abbreviations
- Standard bolts
1B) Mechanical (4HK1)
- Cylinder head cover
- Cylinder head assembly
- Idle gear
- Inlet cover
- Cylinder block
- Exhaust manifold
- Crankshaft
- Piston
- Camshaft
- Flywheel
- Crankshaft rear oil seal
- Rocker arm shaft
- Valve spring
- Valve stem oil seal
- Crankshaft front oil seal
- CMP sensor
- Front cover
- Intake throttle valve
- CKP sensor
- Supplementary information
1C–1J) Engine Systems (4HK1)
Fuel, cooling, lubrication, induction, exhaust, emission control, and electrical systems are covered in dedicated sections. Each one follows the same pattern: component overview, service considerations, and supplementary notes where practical experience matters.
The manual also includes a Service Manual Revision Request Form, which can be useful for workshops that maintain internal documentation standards or track technical updates.
Additional Electrical & Hydraulic Diagram Manual
In addition to the main workshop manual, this package includes a separate PDF file containing electrical and hydraulic circuit diagrams. This file is dedicated entirely to schematics and contains no procedural text, making it especially convenient when diagnosing wiring or hydraulic flow issues.
The diagram manual consists of 18 pages and includes the following content:
- Electrical circuit diagram
- Connectors overview
- Cab harness
- Main harness
- Pump harness
- NOx harness
- Monitor harness
- Console harness
- Control valve harness
- Wiper harness
- Wiper motor harness
- Pilot shut-off solenoid valve harness
- Engine stop switch harness
- Cigar lighter sub harness
- Radiator sub harness
- Hydraulic circuit diagram (mono boom)
- Hydraulic circuit diagram (option: 2-piece boom, AFL 1ch)
- Hydraulic circuit diagram (option: 2-piece boom, AFL 2ch)
These diagrams are especially useful when tracing signal paths, identifying connector locations, or understanding how optional configurations differ from the standard setup. Many technicians prefer keeping this file open separately on a second screen while working.
Delivery (Instant Download)
Both manuals are supplied as digital files and are available for instant download after purchase. No physical media is shipped. For future-proof access, it is recommended to store the files in your workshop archive and keep a backup copy on an external drive.
References
Hitachi 4HK1 Engine Manual / Workshop Manual (Part No. EWDCA-EN-01) PDF File
