Ihimer 25JX Parts Catalog – Factory Exploded Views & OEM Part Numbers

If you are wrenching on an Ihimer 25JX mini excavator and you do not have the factory Parts Catalog in your hand, you are guessing. Guessing on part numbers means ordering the wrong crawler shoe, the wrong control valve seal, or the wrong boom cylinder. That costs you time and money. This is the OEM document – 202 pages of exploded assembly views and part numbers straight from IHI Construction Machinery Limited. No aftermarket shortcuts, no re-labeled Chinese PDFs. This is what the dealer uses.

What the Ihimer 25JX Parts Catalog Actually Covers

Eight major sections: LOWER MACHINE, TURNTABLE, SWING DRIVE DEVICE, HYDRAULIC PIPING, HYDRAULIC INSTRUMENT, OPERATING CONTROLS, POWER UNIT, and CAB & RELATED PARTS. Every section is broken into sheet numbers (e.g., 1-1 through 1-15 for the lower machine). Each sheet shows an exploded diagram with callouts that correspond to a numbered parts list. You get the exact OEM part number, description, and quantity. Need a front idler assembly? Sheet 1-4. Crawler shoe adjustment device? Sheet 1-3. The index on page 3 lists every sheet and its page number.

Why a Factory Parts Catalog Beats Aftermarket Documents

Aftermarket parts catalogs often combine multiple models, guess at supersessions, or omit hardware. This Ihimer 25JX catalog is model-specific, serial number BW000001 and up. The part numbers are the ones stamped on the OEM box. When you order a traction motor rebuild kit based on this catalog, the seal sizes match. When you blindly trust a third-party site, you get a seal that is 1mm too small and you have to tear the assembly apart again. I have seen it in my shop. The Automotive Industry Overview has plenty of examples of aftermarket parts mismatches – but do not learn that lesson on your 25JX.

Lower Machine and Crawler Components: Exact Part Numbers

The LOWER MACHINE section covers the crawler shoe assemblies (sheet 1-2, two pages), the crawler shoe adjustment device (sheet 1-3, two pages), front idler (sheet 1-4), lower roller (sheet 1-5), upper roller (sheet 1-6), and the lower traction piping assembly (sheet 1-7). Each sheet has a page number in the index – for example, sheet 1-1 starts on page 2. If you are replacing a track chain, you need the crawler shoe assembly part numbers. This catalog gives you the number for the shoe itself, the bolts, and the nuts. No guesswork.

Hydraulic Instrument and Control Valve Breakdown

HYDRAULIC INSTRUMENT (section 5) is 14 sheets covering traction motor, swing motor, rotary joint, control valve, remote control valve, hydraulic oil tank, oil pump, boom cylinder, arm cylinder, bucket cylinder, boom swing cylinder, blade cylinder, and multiple valves. The multiple valve assembly has three variations: for A～D change, for A・B・G change, and for A・F change. Each variation has its own sheet (5-13, 5-13 A, 5-13 B). If your machine has the A～D control pattern, ordering the wrong valve assembly means the hydraulic circuit does not work. The catalog prevents that.

Using the Index and Sheet Numbers to Find Parts Fast

Flip to page 3. The index lists every assembly with its sheet number and page. For example, CONTROL PIPING ASS’Y (A～D & A・B・G CHANGE) is sheet 4-4 A, page 38. That is a two-page spread with a diagram and parts list. The page numbers in the catalog match the PDF page numbers. No hunting through generic chapters. The index is bilingual (English and Japanese), so you can cross-reference if needed. Ihimer 80 Parts Catalog – OEM Factory Specs for Mini Excavator and Ihimer 80VX 80NX3 Parts Catalog – Factory OEM Parts List follow the same structure – once you know one, you know them all.

Who Needs This Manual?

Home garage enthusiasts who are rebuilding a 25JX undercarriage. Shop owners who stock parts for rental fleets. Mobile mechanics who do field repairs on Ihimer excavators. Beginners who are learning to identify parts by diagram. The catalog assumes you already have the machine disassembled – it does not include repair procedures. For that, you need the service manual. But for ordering parts, this is the only document you should trust. The Ihimer 14NXT Parts Catalog – Factory OEM Specs covers a smaller machine, but the layout is identical.

Does this catalog include torque specifications or service instructions?

No. This is a parts catalog – it provides exploded views and part numbers only. For torque values and repair steps, get the factory service manual.

How do I verify the part numbers if my machine has a serial number after BW000001?

The catalog covers serial number BW000001 and up. If your machine is within that range, the part numbers shown are correct. For machines with later updates, cross-reference the sheet notes – some sheets have revision marks (REV No.) in the footer. If you are unsure, contact IHI with your serial number and the sheet number. The index also lists sheet revision numbers. Do not skip this step – I have ordered parts that looked right on the diagram but had been superseded. This catalog is the starting point, not the final answer if your machine is more than 10 years old.

That is the long answer. The short answer: start here, but confirm with your dealer for older machines.

Access the Factory Manual – get the 202-page OEM Ihimer 25JX Parts Catalog as a PDF. Print the sheets you need, keep them in a binder near the machine. Your parts orders will be right the first time.