1999–2005 IHI 30NX Mini Excavator Parts Catalog (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.

Text search and diagram detail: Text search is partial: some part numbers and diagram labels are missing from the OCR layer. PDF bookmarks open the main sections and parts index. Dense hydraulic drawings are easier to read when enlarged.

• Undercarriage and swing drive: Parts breakdowns for rubber and steel crawler equipment, front idlers, upper and lower rollers, turntable, swing bearing, and swing drive.

• Hydraulic assemblies: Component illustrations for traction and swing motors, rotary joint, control valve, oil pump, hydraulic oil tank, and attachment cylinders.

• Control configurations: Control piping, remote control valves, and multiple valves for standard and short-lever arrangements, including A-B, A-D, A-B-G, and A-F change options.

• Power unit: Engine & Accessories, Air Cleaner & Muffler, Oil Pump Drive Device, and Fuel Tank & Piping illustrations identify installed components.

• Electrical equipment: Electric System and Instrument Panel assembly drawings identify harnesses, switches, relays, fuses, lights, and battery hardware.

• Digging and blade attachments: Illustrated parts lists for standard and long arms, boom swing, bucket components, attachment piping, and blade assemblies.

• Cab and optional equipment: Canopy and TOPS canopy parts, operator room, heater and defroster, spare-port and power-port piping, plus tools and accessories.

This catalog is suited to parts staff and mechanics who can use assembly drawings and serial-number tables to identify replacement components.

Document Structure and Component Identification

Exploded views link illustrated items to part numbers, quantities, serial applicability, and interchangeability status. The parts-number index provides sheet and key references, while the opening instructions explain assembly asterisks, revision marks, and conditional replacement notes.

That combination helps distinguish a complete assembly from its individual seals, bearings, and hardware before parts are selected for a repair. Applicability refers to factory-built equipment; later field modifications require the related service information.

Traction Motors and Hydraulic Control Variants

Traction motor changes: The catalog separates WE000001–WE000284 from WE000285 onward. It marks the complete motors and specified internal assemblies as interchangeable only in left/right pairs, an important limitation when planning a drive repair.

Control piping and valves: Earlier sheets cover WE000001–WE000933, with revised Control Piping Ass'y and Control Valve Ass'y listings from WE000934. The piping drawings also identify a hose arrangement for WE000934–WE001061, helping distinguish successive hydraulic layouts.

Control Valve Ass'y section views show individual valve blocks, while Oil Pump Ass'y views identify internal pump components. Rotary Joint Ass'y and Boom Cylinder Ass'y drawings link sealing parts to their assemblies; separate cylinder listings cover the arm, bucket, boom swing, and blade.

Power Unit, Cab, and Attachment Differences

The Engine & Accessories section identifies 3LD1-PA32 engine assemblies and an assembly change at WE000053. Coverage concentrates on the installed engine, radiator, oil cooler, mounts, and external connections; it does not provide internal engine overhaul instructions.

The attachment pages distinguish standard and long arms, and the boom-cylinder listings separate canopy equipment from cabin/TOPS configurations. Bucket lists differentiate standard, reinforced, and hook-equipped assemblies, allowing component selection to follow the fitted attachment.

Cab parts extend to glazing, door latches, and wiper equipment. Heater and defroster components have separate assembly drawings.

Electrical Layouts and Repair Scope

Electric System and Instrument Panel Ass'y drawings show component placement and assembly hardware. The electrical listings include the main harness, fusible link, starter and glow relays, safety unit, and monitor; these are parts references, not wiring schematics or electrical troubleshooting charts.

The catalog supports component identification during repair. Step-by-step disassembly, reassembly, adjustment, hydraulic testing, and torque tables are outside its scope.

Before undertaking service or replacing components based on these drawings, review the applicable heavy-equipment safety procedures or consult a qualified technician, particularly for pressurized hydraulics and raised attachments.

Printable PDF and Included Pages

One printable, 328-page PDF contains 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. All front matter, section dividers, and memo pages are already included in the total.