Ihimer 45J Parts Catalog – 310 Pages of OEM Fastener & Index Data

Description

Ever ordered a seal kit based on a third-party cross-reference and ended up with a part that didn’t fit the bore? That’s the kind of waste I can’t stand. If you’re working on an Ihimer 45J Parts Catalog – this is the factory document from IHI Construction Machinery Limited, not a rehash by some office clerk who never touched a wrench. 310 pages of OEM part numbers, exploded-view drawings, and assembly sequences that match what the line workers saw on the floor.

Year after year I see guys buy a used 45J and immediately start swapping parts using aftermarket catalogs. Then they wonder why the idler assembly doesn’t line up or the control valve spool binds. This manual fixes that. It gives you the exact drawing from sheet 1-1 (LOWER MACHINE ASSEMBLY) right through sheet 5-13A (BLADE CYLINDER ASS’Y “S” TYPE). Every sheet number is printed on the page – you won’t be guessing which revision of the swing motor you’ve got.

What the Ihimer 45J Parts Catalog Actually Contains

Index starts on page 3 and breaks the machine into six major groups. Lower Machine covers crawler shoes, front idler, lower/upper rollers, and traction piping. Turntable and swing bearing assembly gets its own two-page spread. Then Swing Drive Device, Hydraulic Piping (return, suction, swing, traction, pump discharge, boom swing, control piping with A～D and A・B・G change variants), Hydraulic Instrument (traction motor, swing motor, rotary joint, control valve, remote control valve, solenoid valve, hydraulic oil tank, oil pump, every cylinder type – Y and S), and Operating Controls (traction lever, control lever, blade/boom swing control, engine control for Isuzu and Yanmar).

Parts Diagram Accuracy – Why OEM Beats Aftermarket

Aftermarket catalogs often collapse multiple revisions into one generic image. This parts catalog keeps separate sheets for control piping variants: FOR SHORT LEVER, FOR SHORT LEVER (CE), and A～D & A・B・G CHANGE. That means if your machine has the short-lever cab, you turn to sheet 4-4B and get the exact hose routing. Copy shops can’t duplicate that level of detail without the original IHI printing plates. You’re looking at the same document the dealer parts counter uses – PUB.No.6, serial number 16006001 and up.

310 Pages – Not a Single Fluff Page

Every page has a purpose. Page 1 is a memo page – you can scribble your notes there. Page 2 is the title page with serial number range. Page 3 and 4 are the bilingual index (English and Japanese). From there it’s all parts breakdowns. No theory of operation, no maintenance schedules – just part numbers, quantities, and reference numbers tied to exploded views. If you’re rebuilding a traction motor, you’ll find sheets 5-1 through 5-8 give you eight views of the TRACTION MOTOR ASSEMBLY, including the separate sheet 5-1A at page 49-1. That kind of repetition is there because IHI knows each production batch might have subtle changes. Aftermarket catalogs would just say “see previous page.” Not here.

Traction Motor Assembly – Real-World Use Case

Last month I helped a guy in New Braunfels who had a 45J that wouldn’t track straight. He’d already replaced the drive motor with a reman unit, but it still pulled left. I told him to pull the OEM catalog and check sheet 5-1 for the TRACTION MOTOR ASS’Y. Turns out the reman had the wrong thrust washer stack – the factory parts list showed two different part numbers for the shim set depending on serial number. His machine was in the 16006xxx range, but the reman was built for earlier units. No amount of generic troubleshooting would have caught that. The catalog saved him from tearing apart the whole undercarriage.

How to Use This Manual with Your Ihimer 45J

Open the PDF on a tablet or print the sheet you need. Cross-reference the part number from the exploded view against the table on the same page. Then order that number from your dealer. Don’t substitute aftermarket equivalents unless you verify dimensions with a micrometer. The hydraulic instrument section (sheets 5-1 through 5-15) covers everything from the solenoid valve to the multiple valve assembly for A～D and A・B・G change. If your machine has the boom swing cylinder (“Y” type or “S” type), sheet 5-12 and 5-12A show both variants. You can’t get that from a three-page generic parts list.

Why Choose the Factory Parts Catalog Over a Reprint

Reprints often lose the fine line weights in the exploded views, making it hard to tell which washer goes where. This is a direct scan of the original IHI publication. Every sheet number, every part callout, every dash number is legible. The index is fully functional – you can navigate from the lower machine to the control piping without flipping through random pages. For the price of a couple of hydraulic hoses, you get the entire parts reference for your 45J. Compare that to the time wasted hunting down a mislabeled bushing from a third-party supplier.

Related manuals you might need for other models: Ihimer 80 Parts Catalog – OEM Factory Specs for Mini Excavator for the larger frame, Ihimer 80VX 80NX3 Parts Catalog – Factory OEM Parts List for the VX/NX3 series, and Ihimer 14NXT Parts Catalog – Factory OEM Specs for compact machines. For a broader look at manufacturing standards, see Automotive Industry Overview.

Does this catalog include torque specs for reassembly?

No. This is a parts catalog, not a service manual. It lists part numbers and exploded views. Torque values are in the separate service manual.

Can I use this catalog to order parts for a 45J with serial number below 16006001?

This edition covers machines from serial 16006001 upward. Earlier serial numbers likely used different part numbers for the lower roller assembly and control piping. IHI released earlier PUB numbers for those. You’ll need the correct revision. Using the wrong parts catalog for an earlier machine will give you mismatched idler assemblies and hydraulic hose lengths that are off by inches – learned that the hard way on a 45J that came through my shop last year. The front idler bracket changed at that serial break. If your machine is older, look for PUB.No.5 or earlier. Don’t assume the parts are interchangeable just because the excavator looks the same. The swing motor mounting plate changed too – sheet 5-2 in this catalog won’t match pre-16006001 swing gearcases. Call IHI with your serial number if you’re unsure. And don’t trust aftermarket “universal” parts catalogs that claim to cover all years – they’re lying. Spend the money on the correct factory manual for your specific serial range. It’ll save you the hassle of returning wrong seals and bushings, not to mention the downtime waiting for the right parts to arrive.

Access the Factory Manual and keep it on your shop tablet or printed in a binder. When you’re ordering a new hydraulic oil tank assembly or a boom cylinder rebuild kit, you’ll have the exact part number in hand. No more guessing, no more returns. That’s how professionals keep a 45J running without chasing ghosts.