Description

Ihimer 18J Parts Catalog

Been there. Stuck on a job because you ordered the wrong hydraulic seal kit for an Ihimer 18J? Or you pulled a part off the undercarriage and can’t figure out the Ihimer part number because the aftermarket catalog shows a blurry sketch with no reference to serial number range? That’s exactly why this Ihimer 18J Parts Catalog exists — 199 pages of factory-original exploded diagrams and part numbers straight from IHI Construction Machinery Limited. No guesswork, no third-party redraws.

Lower Machine and Undercarriage: Find Part Numbers Fast

Section 1 covers the whole lower machine — crawler shoe assembly, front idler, lower rollers, the shoe adjustment device, and the traction piping. If you’re rebuilding a track frame or replacing rollers, you need the exact assembly breakdown from Sheet 1-1 through 1-6. Each page shows the exploded view with a callout number next to each component. Cross-reference that number with the parts index in the back. One serial number mismatch and the tensioner could be wrong. This manual uses the actual IHI engineering drawings — not some recycled image.

Example: front idler assembly (Sheet 1-4) lists every bushing, seal, and bolt. You can count the number of bolts on the flange before you even pull it apart. That’s the difference between ordering once and ordering twice.

Hydraulic System Exploded Views: 5-1 to 5-16

Section 5 is the thickest part — 16 separate sheets covering traction motor, swing motor, rotary joint, control valve, remote control valves, cylinders (boom, arm, bucket, boom swing, blade), multiple valves, and the manifold. The Ihimer 18J uses a gear pump and a separate oil pump assembly; Sheet 5-8 and 5-9 show those pump assemblies with every O-ring and port. If you’ve got a leak at the rotary joint (Sheet 5-3), you can match the seal kit part number by the serial number prefix BB000001~ that’s printed on page 2. Aftermarket catalogs skip that serial number split — this manual doesn’t.

Also includes variant sheets for short lever controls (5-5B, 5-4B) and A/B/G changeover valves. If your machine has a Hutter cab, you’ll see those variants in sections 6 and 8 as well.

Why Factory Parts Catalogs Beat Aftermarket Lists

I’ve seen aftermarket “parts manuals” that list one part number for a control valve that actually has three different revisions. The factory catalog shows Sheet 5-4 (control valve assembly) and then Sheet 5-4A for the A～D & A・B・G change, and 5-4B for short lever. Each sheet has its own revision number (REV No. 2, REV No. 3) printed at the bottom. You can verify you’re looking at the correct revision for your machine’s serial range. That’s something a PDF stitched together from third-party scans won’t have.

Also, compare the index structure — the factory manual organizes by machine subsystem: Lower Machine, Turntable, Swing Drive, Hydraulic Piping, Hydraulic Instrument, Operating Controls, Power Unit, Cab, Electric System, Tools, Hoe Attachment, Blade Attachment, Special Parts. That’s 12 major sections plus the parts index. Aftermarket lists throw everything under “Miscellaneous” and leave you flipping.

Using the Index and Page Numbers

Page numbers run sequentially but each section also has a sheet number (e.g., 1-1, 2-1). The index on page 3 maps every sheet to a description and page number. Need power unit parts? Section 7 covers engine & accessories (Sheet 7-1, page 90), air cleaner & muffler (7-2, page 94), oil pump drive device (7-3, page 96), fuel tank & piping (7-4, page 98) plus variant with water sedimenter (7-4A, page 100). Open the PDF, type the page number, and you’re looking at the exact drawing.

3 Reasons This 199-Page Document Saves Your Ass

• Serial number range BB000001~ is printed on every sheet — you can confirm compatibility even if the serial tag is worn.
• Every hydraulic cylinder (boom, arm, bucket, boom swing, blade) has its own assembly page with all seals, rods, and pistons exploded.
• The parts index at the back cross-references every part number to the sheet where it appears. No flipping through 50 pages guessing.

Related manuals you might need: IHI 18J Parts Catalog – Section: Electric System covers the electric system separately. For bigger machines, check Ihimer 80 Parts Catalog – OEM Factory Specs for Mini Excavator and Ihimer 80VX 80NX3 Parts Catalog – Factory OEM Parts List.

For context on the broader automotive/construction industry: Automotive Industry Overview and Automotive Industry Overview.

Can I use this catalog to order parts for an Ihimer 18J with a different serial number prefix?

This catalog covers serial numbers starting BB000001~. If your machine has a prefix outside that range, you may need a later revision. The manual shows REV No. 2 and REV No. 3 marks — check your machine’s serial plate.

Does this catalog include torque specs for bolts?

No. This is a parts catalog — it shows exploded views and part numbers. Torque specs belong in the service manual. You need the Ihimer 18J service manual for tightening procedures.

Stop wasting hours on the wrong parts. Access the Factory Manual and get the Ihimer 18J parts breakdown your shop needs.