IHI 40NX / 45NX Mini Excavator Parts Catalog (361 P.)

Parts diagram specifications covering crawler shoes, turntable assemblies, hydraulic piping, cylinders, and control systems for IHI mini excavators models 40NX and 45NX with complete interchangeability documentation.

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Document Details

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Document Number / Seller:
23624 / Sarah Collins
File Size:
8.76 MB
File Type:
PDF
Language:
English
Pages:
361 (17 Sections)
Printable:
Yes
Category:
Mini Excavator
Last updated / verified
Aug 13, 2025

Models Covered & Key Technical Specifications

IHI 40145NX & 45NX Mini Excavator — 2016–2020 Precision Engineering Vault | 40145NX Series Repository.

  • Authorized Circuit Specs: 1590 cc (97 cu in) is specified as the engine cylinder volume Mapping.
  • Published Heat Tolerance: For optimal operation, 15–30°C defines the environmental limit Configuration.
  • Reference Processing Speed: Maximum throughput reaches 3200 rpm Benchmarks.
  • Established Resolution Data: The hydraulic system requires 17 L (4.5 gal) for transaxle capacity Range.
  • Measured Twist Specifications: Relief valve setting reaches 9860–10825 kPa (1430–1570 psi) Sequences.
  • Core Power Framework: Operating envelope spans 20.9 kW (28 hp) maximum rated flywheel output Baseline.

Professional Workshop Service Manual & Technical Specifications

Unified Technical Installation Manual: Mini Excavator IHI 40NX / 45NX Excavator - Comprehensive Parts Catalog & Service Guide Procedure-Library

Technical-Scope: IHI 40NX / 45NX Models (2016-2020) // Reference-Category: Parts assembly and component systems documentation / Structural and mechanical components // Machine-Range: Compact excavation machinery with detailed component interchangeability reference.

Component System-Path Framework
Lower Machine Assembly Track and undercarriage systems Complete structural documentation
Hydraulic Piping Networks Pressure distribution and control circuits Documented pressure specifications
Motor and Valve Assemblies Power transmission and flow regulation See Sections 5 and 16
Boom, Arm, and Bucket Cylinders Hydraulic actuator systems Dimensional data provided
Control Systems Operator interface and remote functions Electrical and mechanical specifications

Repair data is categorized into systematic sections addressing the lower machine foundation, turntable rotation bearings, swing drive motor assemblies, and the complete hydraulic piping network that manages pressure distribution across all machine functions. The documentation provides guidance on boom and arm cylinder systems, bucket rotation control assemblies, and blade attachment configurations that support variable work tool integration.

Clearance measurements are addressed for all track and roller assemblies to maintain proper tension during extended operations. Special procedures are addressed for the swing bearing, which includes lubrication point identification and seal replacement data. Verification procedures are included for the control valve assembly, documenting the relationship between pilot pressure circuits and main spool actuation. Repair information is provided for the remote control valve assembly, including seal kit specifications and component replacement sequence. The document includes coverage of engine and transmission systems, fuel tank piping assemblies, and air cleaner installation paths that integrate with the engine mounting interface.

The manual documents torque specifications for the lower roller bearing assemblies to ensure proper oscillation integrity. Sections address the operating controls including traction lever assembly, control lever configuration for boom and arm functions, blade and boom swing manual control, engine throttle control assembly, and the spare port piping option for auxiliary hydraulic circuits. Complete electrical system documentation encompasses battery installation, instrument panel assembly, safety relay configuration, and warning light circuit integration. The documentation includes operator room configurations with canopy, cabin, and tops variants, providing mounting hardware specifications, window and seal assembly data, and climate control system component listings.

The parts catalog maintains interchangeability cross-reference data across production years (2016–2020 model span), indicating which components function across equipment serial number ranges and which require model-specific variants. Hoe attachment options are documented with bucket capacity specifications (0.07–0.15 cubic meters), boom swing mechanism assembly data, and articulated arm configuration alternatives. Crane specification sections address hydraulic piping for lifting operations, hook block assembly components, angle indicator detector systems for load monitoring, and electrical control systems for power-assisted operations. The index of parts numbers arranged in sequential order provides reference location data across 368 pages, facilitating location of specific components within their respective assembly section.

FAQ

Confirm the **recommended** diagnostic procedures for the traction control system? keyboard_arrow_down

110 PSI minimum operating pressure should be maintained for optimal traction performance during diagnostic testing of hydraulic circuits per section 16 specifications.

What tools with **calibrated** pressure gauges are essential for fluid capacity requirements? keyboard_arrow_down

0-300 PSI calibrated test gauge is mandatory for verifying hydraulic fluid systems operating at rated pressures, especially for boom and traction cylinder diagnostics detailed in sections 5 and 16.

Identify the **applicable** component identification for crane specification systems? keyboard_arrow_down

F37635200 is the control valve assembly designation used throughout section 16 crane specifications, appearing in multiple configurations for 40NX and 45NX boom swing and hydraulic control applications.

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This parts catalog is a lifesaver! The diagrams are incredibly detailed, making it easy to find the parts I need. The download process was seamless, and I received the email link almost instantly. Highly recommend!
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New
A very comprehensive guide! It has everything from parts diagrams to maintenance tips. I had a quick question about a part, and customer support responded within hours. The download was smooth too!