Description

Aichi SR12B, SR12BJ, ISR40B, ISR40BJ Parts Catalog – Stop Guessing Part Numbers

If you’ve ever ordered a seal for an Aichi SR12B, SR12BJ, ISR40B, ISR40BJ crawler boom lift and ended up with the wrong part because the number was buried in a third-party reprint, you know the pain. I’ve seen guys waste a full shift because a parts list from some aftermarket site had the wrong hydraulic motor assembly number. This Parts Catalog is the actual factory print – 182 pages of exploded diagrams and part numbers that match what Aichi Corporation shipped. No condensed tables, no recompiled garbage. You get the same list the dealer uses when he punches your serial into the computer.

That’s it. Straight from the source.

Parts Breakdown: From Frame to Fly Jib

This catalog is organized by major assemblies. Start with the FRAME section – includes crawler tubing, roller assemblies (ROLLER C and ROLLER T), travel motor, swivel joint, shoe, front idler, and spring assembly. Then the TURN TABLE group splits into engine, radiator, engine control, suction tubing, and fuel tubing sections. Each has multiple LIST pages with part numbers, descriptions, quantities, and level codes. Further down you get BOOM (five lists plus tubing), FLY JIB, basket, rotary actuator, elevation cylinders, leveling cylinders – everything down to the boot cylinders and decals. If you need to find the part number for a specific hydraulic hose or a pivot pin, it’s in here.

What Serial Numbers Does This Catalog Cover?

Inside the first page it states: “Applied Specification E-20 FC0, Serial No. 686068 AND UP”. That means this version of the catalog applies to machines built at or after that serial number cut-in. If your machine is older, you may need a different edition. Always check the serial plate before ordering – Aichi updates parts lists when they revise components. This manual matches later production units with the E-20 spec.

3 Reasons to Use Factory Aichi Documentation

Reason 1: The part numbers are verified at the factory. Aftermarket parts lists often transpose digits or use superseded numbers without notice. Here, each number appears alongside an illustration and a level indicator that tells you whether it’s a stand-alone item or part of an assembly. Reason 2: The illustrations are drawn from the actual CAD data – you see the shape of the bracket, the routing of the tube, the bolt pattern. That reduces guesswork when a seal kit looks different in your hand. Reason 3: The “LEVEL” column prevents double-ordering. A parent assembly is marked “1”; its components are “2”; sub-components are “3”. You don’t accidentally buy a complete travel motor when all you needed was a piston.

Part Numbers, Not Torque Specs: What This Catalog Delivers

This is a parts catalog, not a service manual. If you need torque values or adjustment procedures, you want the Aichi SR12B SR12BJ ISR40B ISR40BJ Operators Manual or the Aichi SR12B/SR12BJ Crawler Boom Lift User Manual. But for ordering parts – especially when you’re facing a shelf full of identical-looking seals – this catalog is what you lean on. The INDEX sections (INDEX 1 through INDEX 3) list every part number alphabetically and numerically. The ILLUSTRATIONS INDEX (eight sections) gives you a thumbnail of each exploded view so you can find what you need fast.

Navigating the Illustrations Index

Eight separate ILLUSTRATIONS INDEX pages let you scan small images of every assembly. For example, if you’re looking for the spring assembly, find its thumbnail, note the group number, then turn to the corresponding LIST page. Each LIST has a column for part number, description, quantity, level, serial number application, and remarks. The remarks column includes symbols like “A” (assembly-only replacement), “N” (semi-finished part), “R” (reworked part), “C” (substitute part), “K” (service kit), “S” (selective part), and “H” (sealant/adhesive). Memorize those symbols – they save you from ordering a loose part that only comes in a kit.

Using the Level Column Correctly

Scan the LEVEL column before you add anything to your cart. If the entry shows “1”, that’s the complete assembly. “2” is a component of that assembly. “3” is a sub-component. A common mistake: ordering a “2” part when you really needed the “1” assembly. For instance, the TRAVEL MOTOR LIST 1 shows the motor assembly; LIST 2 and LIST 3 show internal parts. If the catalog says the motor assembly is only sold as a unit (symbol “A”), then don’t waste time trying to buy the seal separately – it’s not available. This kind of information is buried in aftermarket reprints or omitted entirely.

One more thing: the catalog includes a FRAME(CRAWLER TUBING) LIST, separate ROLLER T lists (two of them), and two DECALS sections (LIST 1 and LIST 2). Even the decals have part numbers – for safety labels that may be faded or missing on older machines. You can legally replace them with factory spec decals.

FAQ – Common Questions About This Parts Catalog

Where can I find the part number for the travel motor?

Turn to the TRAVEL MOTOR section in the table of contents. It has three LIST pages. If your serial is 686068 and up, the part numbers listed are current. Check the LEVEL column to see if the motor is sold as an assembly or if individual components are available.

Does this catalog include hydraulic hose part numbers?

Yes – look under TURN TABLE(TUBING) sections and TURNTABLE TUBING lists. The catalog covers suction tubing, fuel tubing, and the entire turntable hose routing. Each hose is listed with its part number and quantity for one machine.

What does ‘AR’ mean in the quantity column?

‘AR’ stands for ‘as required’. That means the part (like a sealant or a hose clamp) is used in varying quantities depending on the machine build or service condition. When ordering, you need to tell Aichi how many you need. This is common for bulk items like O-rings, threadlocker, or electrical ties. Check the remarks column – sometimes ‘AR’ parts are also marked with ‘H’ for sealant/adhesive supplies.

Is this manual in English?

Yes, it includes both Japanese foreword and English foreword, plus English column headers and remarks. All part numbers and descriptions are readable for English-speaking technicians.

After you’ve used a third-party parts list that sent you the wrong boom cylinder seal because the number was off by one digit, you’ll understand why factory documentation matters. This catalog is a direct scan of the Aichi publication – no OCR errors, no re-keyed numbers. It’s the same document the dealer pulls up when you call. Stop wasting time and money on parts that don’t fit. AICHI SR12B/ISR40B Parts List Manual is already on the site, but this one adds the SR12BJ and ISR40BJ variants. If you need the operator’s manual for procedures, check the related manuals section below. For general industry context, see the Automotive Industry Overview. Or read the Automotive Industry Overview for background on equipment standards. Access the Factory Manual and never order by guesswork again.