IHI 30NX Mini Excavator Parts Catalog, 1999–2005 (P/N PUB.No.3)

This IHI Construction Machinery Limited parts catalog, PUB.No.3, covers the 1999–2005 IHI 30NX Mini Excavator, starting at serial number WE000001.

Printable PDF and Parts Index

Text search and drawing detail: PDF bookmarks open the main sections and parts index. Text search is partial, so some printed part numbers and labels need to be located visually. Enlarge dense hydraulic drawings to read small callouts.

The download is one printable 328-page PDF. It includes 254 pages of parts drawings and lists, a 22-page parts-number index, five introductory pages, one cover, 14 section dividers, and 32 memo pages. The introduction is in English, and the illustrated parts sections use English and Japanese.

Illustrated Assemblies and Parts Lists

These selected assemblies show how the catalog is organized. Additional listings include the traction alarm and backup horn.

• Undercarriage and swing drive: Rubber and steel crawler equipment, front idlers, upper and lower rollers, turntable, swing bearing, and swing drive.
• Hydraulic assemblies: Traction and swing motors, rotary joint, control valve, oil pump, hydraulic oil tank, and boom, arm, bucket, boom-swing, and blade cylinders.
• Operating controls: Control piping, remote control valves, and multiple valves for standard and short-lever arrangements, with A·B, A~D, A·B·G, and A·F change options.
• Power unit: Engine and accessories, air cleaner and muffler, oil pump drive, and fuel tank and piping.
• Electrical equipment: Electric system and instrument panel drawings cover harnesses, switches, relays, fuses, lights, and battery hardware.
• Digging and blade attachments: Standard and long arms, boom swing, bucket components, attachment piping, and blade assemblies.
• Cab and options: Canopy and TOPS canopy parts, operator room, heater and defroster, spare-port and power-port piping, and tools and accessories.

Parts staff and mechanics can use the assembly drawings and serial-number tables to identify replacement components before ordering.

Part Numbers and Interchangeability

Exploded views link drawing callouts to part numbers, quantities, serial applicability, and interchangeability marks. The numerical index points back to the sheet and item number. The introductory pages explain assembly asterisks, revision marks, and conditional replacement notes.

Use those references to identify whether a seal, bearing, or piece of hardware is listed separately from its assembly. The serial listings apply to factory-built equipment. Check the applicable service updates for machines modified in the field.

Traction Motors and Hydraulic Controls

Traction motors: Separate listings cover WE000001–WE000284 and WE000285 onward. The interchangeability note applies to the complete traction motors and specified internal assemblies and calls for replacement in left/right pairs.

Control piping and valves: Earlier control piping sheets cover WE000001–WE000933. Revised piping and control-valve listings begin at WE000934. The return-and-suction piping list also identifies a tee for WE000934–WE001061.

Control-valve section views identify individual valve blocks, and the oil-pump views show internal pump components. Rotary-joint and boom-cylinder drawings link seals to their assemblies.

Engine, Cab, and Attachment Fit

The 3LD1-PA32 engine assembly changes at WE000053, while the engine-and-accessories listing changes at WE000878, including the radiator and oil cooler. The drawings cover the installed engine, mounts, and external connections. Use an engine workshop manual for internal overhaul procedures.

The boom-cylinder listings distinguish canopy equipment from cab and TOPS configurations. Bucket listings identify standard, reinforced, and hook-equipped assemblies. Cab parts include glazing, door latches, and wiper equipment.

Electrical Parts and Service Scope

The electrical drawings show component placement and assembly hardware, including the main harness, fusible link, starter and glow relays, safety unit, and monitor. Use the applicable service information for wiring schematics, electrical troubleshooting, hydraulic testing, adjustments, torque values, and step-by-step repair procedures.

Before servicing pressurized hydraulics or working around raised attachments, follow the applicable heavy-equipment safety procedures or consult a qualified technician.

Selected Track Shoe and Boom Swing Details

The steel crawler parts list identifies 300 mm track shoes. The boom-swing assembly lists an M10 × 170 bolt with a 1.25 mm thread pitch and a PT 1/8 grease fitting with a 90° angle. The dimensions help identify the listed parts.