Description

Aichi ISP60J, ISP70J, SP-18A, ISP60, SP-18AJ Parts Catalog – 363 Pages of Factory Part Numbers

You are staring at a boom lift that won’t lift. The cylinder seals are leaking, and the counterweight bracket is cracked. The local dealer wants two weeks and a VIN number that doesn’t exist on a 1999 Aichi. You need the exact OEM part number for that holding valve, and you need it now. This Aichi ISP60J, ISP70J, SP-18A, ISP60, SP-18AJ Parts Catalog is the only way to get it right the first time. I’ve been a master tech for 28 years, and I’ve seen more mechanics fail jobs because they guessed at a part number than because they didn’t have the right tool. This 363-page book (pdf, really – but you print the pages you need) gives you exploded views, level codes, and manufacturer-supplied part numbers. No aftermarket reprints, no guesswork.

Foreword and Abbreviations: Read This First

Page 2 of the catalog explains the LEVEL column system. An assembly (level 1) is made of components (level 2), which can have sub-parts (level 3). The quantity listed is per machine unless you see AR (As Required). The abbreviation list on page 3 is your Rosetta stone. AR, ASSY, BKT, CYL – you’ll find them all in the parts lists. Don’t skip the FOREWORD. It tells you how to read the symbol column: A for supplied as assembly, N for semi-finished, R for reworked parts, C for interchangeable substitutes, K for service kit components, S for selective parts from multiple manufacturers, H for miscellaneous seals and adhesives. If you order a part with symbol A, you get the whole assembly – the part number after A is what ships. Know that before you call a supplier.

Chassis and Tubing Lists: Where the Real Part Numbers Live

The CHASSIS section (Lists 1, 2, 3) covers frame components, axle cylinders, steering cylinders, flow divider valves, and counterweights. Each list has an exploded drawing and a table with item numbers, part numbers, descriptions, quantities, and remarks. For the SP-18A and ISP60, the counterweight (chassis) list is shared with the 18AJ and 60J – but the turn-table counterweights are separated by model. You need the exact model: SP-18AJ ISP60J uses a different counterweight part than SP-18A ISP60. The CHASSIS(TUBING) section has three separate entries – each with Lists 1 and 2. Don’t assume the tubing run is the same across models. Verify with the illustrations.

Counter Weight Charts: Which Block for Which Model?

There are seven counterweight lists: two for chassis (SP21AJ/ISP70J; SP21A/ISP70; SP18A/18AJ ISP60/60J) and four for turn-table (same splits). The turn-table counterweight for SP18AJ ISP60J has its own list, separate from SP18A ISP60. Page numbers aren’t labeled, but the INDEX sections at the front can get you there. If you’re working on an ISP70J and order a counterweight from the SP21A ISP70 list, it won’t fit. The mounting holes are different. Use the exact model designation from the serial plate.

Boom Sections, Cylinder Lists, and Valve Blocks

The BOOM listings are massive: 6 lists each for SP21AJ ISP70J, SP21A ISP70, SP18AJ ISP60J, and SP18A ISP60. Each boom section includes separate tubing lists (2 each). The EXTENSION CYLINDER lists differentiate between the SP21A/21AJ ISP70/70J, the SP18AJ ISP60J, and the SP18A ISP60. If you need the holding valve for the elevation cylinder, there is a dedicated HOLDING VALVE list – but the model split matters. The VALVE BLOCK sections (EXTENSION, ELEVATION, ROTATION) each have their own list. Don’t mix up the PL COVER ASSEMBLY with the END COVER ASSEMBLY – they are different parts.

Does This Manual Cover the ISP70J and SP-18A as Well?

Yes. The cover clearly lists Model SP-18A/ISP60, SP-18AJ/ISP60J, SP-21A/ISP70, SP-21AJ/ISP70J with applied specification TFE/SFE. Every list in the TOC that has a model-specific heading includes the relevant models. For example, the JOINT PARTS list is split into SP18AJ,21AJ ISP60J,70J and SP18A,21A ISP60,70. The BASKET BASE lists are also split by model. The CONTROL UPPER and CONTROL LOWER sections have separate lists for SP18AJ/21AJ ISP60J/70J, SP21A ISP70, and SP18A ISP60. If you don’t see your model in a list heading, it’s not included in that list. The INDEX sections (5 of them) and ILLUSTRATIONS INDEX (12 sections) help you cross-reference.

Source Validity: Why OEM Beats Aftermarket Every Time

Aftermarket parts catalogs online are a dumpster fire of copy-pasted part numbers from unknown sources. I’ve seen wrong numbers lead to ordering the wrong pilot check valve – $300 mistake plus downtime. This catalog is scanned from the original Aichi PDF file (AICHI_SP-18A-ISP60-SP-18AJ-ISP60J-SP-21A_Parts_Catalog_en-50214019111.pdf). It includes the FOREWORD, abbreviation list, and all the symbol codes. That’s factory documentation, not a third-party recompilation. You can trust the part numbers printed by Aichi Corporation, 1152 Ryoke, Ageo, Saitama, Japan. For background on why OEM documentation matters in the Automotive Industry Overview, you’ll see the same emphasis on traceability and spec adherence.

What’s Inside the 363 Pages?

The table of contents includes: CHASSIS (3 lists plus 3 tubing lists), OSCILLATION AXLE CYLINDER, STEERING CYLINDER, FLOW DIVIDER VALVE (2 lists), DOUBLE PILOT CHECK VALVE, SHUTTLE VALVE, COUNTER WEIGHT (7 total – chassis and turn-table by model), TIRE, TURN TABLE (2 sections with 5+4 lists), RELAY BOX, SOLENOID VALVE UNIT, PROPORTIONAL CONTROL VALVE, VALVE BLOCK (3 sections), PL COVER, END COVER, PILOT CHECK VALVE, COMBINATION VALVE, ROTATION GEARBOX, CHECK VALVE BLOCK, FLOW PRIORITY VALVE, ANGLE SENSOR, TURN TABLE TUBING (8 lists total across 2 sections), SWIVEL JOINT (2 lists), COVER (turntable and rotation bearing), JOINT PARTS (2 model splits), ELEVATION CYLINDER, HOLDING VALVE, LEVELING CYLINDER (lower and upper, model split), BOOM (4 model sections, each with 6 lists plus tubing), BOOM LENGTH SENSOR, EXTENSION CYLINDER (3 model splits), FLY JIB, FLY JIB CYLINDER, RELIEF VALVE, HOLDING VALVE (fly jib), BASKET BASE, ROTARY ACTUATOR, VALVE UNIT, BASKET (2 lists), CONTROL UPPER (3 model splits), CONTROL BOX (upper and lower, model splits), CPU BOX. That’s the whole machine, from chassis to basket controls.

How to Use the Level Column

The FOREWORD on page 2 explains: Level 1 is the main assembly. Level 2 components belong to that assembly. Level 3 parts are sub-components. When ordering, you need the level appropriate to your repair. If a bracket is part of an assembly (level 1) but you only need the bracket (level 2), order the level 2 part number. But if the bracket is only sold as part of the assembly (symbol A), you have to order the whole thing. The catalog makes this clear. Don’t skip reading the FOREWORD – it’s only one page but it saves you ordering a $900 valve block when you only needed the $12 relief valve.

Related manuals you might need: AICHI SP18AJ/SP21AJ Operation Manual, Aichi SR18AJ SR21AJ SR18A SR21A Parts Catalog – 300pp OEM, and Aichi SR12B SR12BJ ISR40B ISR40BJ Parts Catalog – OEM Factory List. For general industry standards, see Automotive Industry Overview.

Frequently Asked Questions

Does this catalog include torque specs or service procedures?

No. This is a parts catalog only. It provides part numbers, quantities, illustrations, and level codes. For service procedures, get the factory service manual.

How do I find a part number for the holding valve on the elevation cylinder of an ISP60J?

Go to the HOLDING VALVE (FOR ELEVATION CYL.) list. The heading says only that – no model split because it’s common. Check the illustrations index. If you see a list specifically for that valve, use it. The part number will be in the table.

What does the symbol ‘C’ mean in the remarks column?

It means the part can be substituted with a different part number listed after the ‘C’. That substitute is an approved alternative. Use it if the primary part is unavailable. The substitute part number is given in the same column.

Can I use this catalog for the ISP70J if I have an SP21AJ?

Yes. The catalog covers both SP21AJ and ISP70J as a group in many lists. Check the list heading – if it says SP21AJ ISP70J, it applies. Separate lists exist for SP21A ISP70. Always verify the model split before ordering.

You know what to do. Access the Factory Manual and stop guessing. One PDF with 363 pages of Aichi OEM part data – pull the trigger and get back to work.