Description

Ihimer 40JX Parts Catalog – Factory OEM Parts Breakdown

If you’ve ever stared at a worn-out crawler shoe, flipped through an aftermarket parts list that had three different numbers for the same bolt, and then still ordered the wrong one — you already know why this matters. The Ihimer 40JX Parts Catalog is the factory document. It’s what the dealer uses. It’s what the assembly line used. Every part number, every diagram, every revision stamp came from IHI Construction Machinery, not from some third-party reprint house.

This thing is 313 pages of OEM breakdowns. Not a service manual — a parts catalog. That means you get exploded views of every assembly on the 40JX mini excavator, from the lower machine all the way up through the hydraulic piping and the cylinder groups. You don’t guess. You read the sheet number, find the part, and order the exact piece. No returns. No downtime waiting for the wrong seal kit.

Lower Machine Assembly: 17 Pages of OEM Breakdown

The lower machine section covers sheets 1-1 through 1-17. That’s the crawler shoe assemblies, the front idler, lower and upper rollers, the traction piping — everything below the turntable. Each sheet has a numbered diagram with a corresponding parts list. Page 2 shows the first lower machine assembly drawing with the track frame, sprocket, and idler mount. If you need a crawler shoe adjuster device, you find it on sheet 1-3. The catalog breaks it down by serial number range, too — note the “FOR AB” variants in the crawler shoe section. That matters when you’re ordering for a machine built after a certain production change.

Crawler Shoe Assembly and Adjuster Device

Four separate sheets for crawler shoes alone (1-4 through 1-7) plus two more for the adjuster device. The catalog shows the standard shoes and the AB variant shoes. If you’re rebuilding an undercarriage, you need to know which shoe pitch and link count your machine uses. This catalog gives you the OEM part numbers. Stop cross-referencing aftermarket catalogs that lump everything together. Use the factory document and get the right parts the first time.

Hydraulic Piping: 50 Sheets of Line Diagrams

Section 4 is the thickest part of the catalog — hydraulic piping. Return and suction piping, swing and traction piping, pump discharge and boom swing piping, and then control piping with multiple variant groups: A~D & A·B·G change, short lever, short lever CE, and A·F change. That’s 50 sheets of plumbing diagrams. If you’re replacing a blown hose or a fitting on the control valve bank, you need to know which piping variant your machine has. The catalog indexes each sheet by the revision level. Don’t rely on a universal drawing. Get the sheet that matches your machine’s serial number.

Traction Motor and Swing Motor Breakdown

Page 48 starts the hydraulic instrument section with the traction motor assembly. That’s sheet 5-1 and 5-1A. The swing motor assembly follows on sheet 5-2. Both give exploded views with all internal seals, bearings, and port plates. If you’re rebuilding a motor, you need the OEM part numbers for the shaft seal and the brake piston. Aftermarket cross-reference databases often miss the updated revision. This catalog shows the original IHI part numbers. Pair it with the service manual for torque specs, but use this catalog for the parts ordering.

OEM Source Validity: Why Factory Parts Catalogs Beat Aftermarket Reprints

Aftermarket parts catalogs often combine multiple machine models into one generic list. They drop revision notes, omit the “FOR AB” sub-variants, or use a different numbering system that doesn’t match IHI’s original. That costs you time and money. The Ihimer 40JX Parts Catalog is a direct scan of the factory publication. It includes the index with sheet numbers, page numbers, and revision history (REV No.3 – 1 is visible in the OCR excerpt). That’s the kind of documentation that keeps your shop from ordering the wrong control valve spool. For broader context on why OEM documentation matters in heavy equipment, check the Automotive Industry Overview on industry standards. Same principle applies to construction machinery.

3 Reasons to Use This 40JX Parts Catalog

First, you get the exact part numbers from IHI — no translation errors. Second, the diagrams show assembly order, so you can verify you’re not missing a thrust washer or a retaining ring. Third, the catalog includes variant breakdowns for machines with different control piping (short lever, CE spec, A·F change). If you’re working on a machine that came from a different market, this catalog covers it. Related manuals like the Ihimer 80 Parts Catalog – OEM Factory Specs for Mini Excavator and Ihimer 80VX 80NX3 Parts Catalog – Factory OEM Parts List follow the same format, so if you run a mixed fleet, you can get consistent documentation. There’s also the Ihimer 14NXT Parts Catalog – Factory OEM Specs for smaller machines.

FAQ

Is this the service manual or the parts catalog?

Parts catalog. 313 pages of exploded diagrams and OEM part numbers. No repair procedures or torque specs.

Does it cover the hydraulic cylinders?

Yes. Section 5 includes boom cylinders (Y and S type), arm cylinders, bucket cylinders, boom swing cylinders, and blade cylinders. Each with multiple sheets for different production variants.

How do I find the right sheet for my machine?

Use the serial number range printed on the cover (Serial No. BD000001~). Then cross-reference the index. Sheet numbers are grouped by assembly and variant. For example, control piping for short lever machines is on sheets 4-4B and 4-4AB. If your machine has a different piping change, find the matching sheet number in the index before ordering parts.

Can I use this with the service manual?

Yes. The parts catalog gives you the part numbers; the service manual gives you removal and installation procedures. They’re designed to work together. The Automotive Industry Overview explains how factory documentation integrates for proper maintenance. Get both if you’re doing a full rebuild.

Stop wasting time on aftermarket parts lists that leave you guessing. The factory Ihimer 40JX Parts Catalog puts the exact OEM breakdown on your screen. Every sheet matches what IHI shipped from the factory. Access the Factory Manual and start ordering parts with certainty.