Description

Kyokuto Kaihatsu PH40-16 Parts Catalog – 183 Pages of Factory Part Numbers

You are holding a parts catalog that came out of Kyokuto Kaihatsu’s own engineering department. Not a reprint. Not a scan of a scan. This is the original factory document for the PH40-16 squeeze-type concrete pump truck with the 3-stage folding boom. If you have ever ordered a part number from an aftermarket list and ended up with a rubber roller that didn’t fit the rotor assembly, you know exactly why you need this 183-page book on your bench. The difference between a factory catalog and a third-party compiled list is the difference between a bolt that torques to spec and one that strips out at 50 ft-lb.

I have been wrenching for 28 years. I do not trust aftermarket parts catalogs for anything that moves concrete under pressure. This one is legitimate. It covers the PH40-16 from the first production unit in October 1993 through the last in December 1998. You get the exact part numbers, the assembly diagrams, and the revision notes that tell you when a part was superseded. That matters when you are ordering a hydraulic motor for a boom that has already been updated twice.

Unit Assembly and Hydro-Piping: Page 2 Breakdown

Flip to page 2 and you see the entire machine laid out as a major-item diagram. Sixty-six numbered callouts point to every assembly from the unit itself down to the control motor bracket. The legend on page 3 translates those numbers into the actual assembly names: Unit Assy, Unit Chassis Assy, Pump Assy, Rotor Assy, Rubber Roller Assy, Thrust Guide Roller Assy, Radial Guide Roller Assy, and so on. If you need to find the part number for the boom support assembly, you start here. The catalog groups everything by these major items, then drills into the components. That structure is exactly what a shop needs when a customer is waiting on a concrete job and you have to verify that the replacement parts will match the chassis modification that was done at the factory in 1995.

Each major item section includes a detailed exploded view with reference numbers that tie directly to the parts list. You get the part number, description, quantity per unit, and any design change notes (OEC numbers) that track engineering revisions. No guesswork. No “call for availability”. Just factory data.

Pump, Rotor, and Roller Assemblies – Squeezecrete Specifics

Inside this catalog you will find the complete breakdown for the squeeze-type concrete pump. The rotor assembly (item 7) is shown with its rubber roller, thrust guide roller, and radial guide roller. The catalog even breaks down the pump gauge assembly (item 8) and the water piping in three separate revisions: up to July 1995, August 1995 to September 1996, and October 1996 onward. If you order a water pipe for a 1994 chassis using a generic cross-reference, you might get the early version that doesn’t have the clearance for the later control panel. This catalog saves that headache because it tells you exactly which part fits which production range.

The rubber roller assembly (item 9) and the pad assembly (item 10) are detailed with separate sub-assembly listings. For a shop that rebuilds these pumps, having the OEM part numbers for the roller and pad kits means you can quote the job accurately and not eat the cost of a wrong part.

Boom System and Cylinder Parts – 3-Stage Folding Boom Coverage

PH40-16 has a 16-meter (52.5-foot) 3-stage folding boom. The catalog covers the boom assembly (item 36), the beam assembly (item 37), and the individual NO.1, NO.2, and NO.3 beams with their attached parts. The links A, B, C, and D are listed, as well as the guard assembly (item 41), the luffing cylinder assembly (item 42), and the two folding cylinder assemblies (NO.1 and NO.2, items 43 and 44). You also get the front jack assembly (item 45-1), the jack cylinder assemblies RH and LH (items 45-2), and the axle lubrication assembly (item 46). If a cylinder seal blows on a job site, you need the right part number for the seal kit. This catalog has it.

Hydraulic Piping and Control Diagrams

Hydraulic systems on concrete pump trucks are not forgiving. A wrong fitting or a mis-routed hose can dump 2000 psi of hot oil across the shop floor. This catalog devotes separate sections to the hydro-piping for the unit, pump, outriggers, and boom. The boom hydro-piping is split into two revisions: up to April 2004 and May 2005 onward (note: production ended 1998, so this likely refers to later model years or a correction in the catalog). Additionally, the concrete piping around the boom and turnpost is detailed. The control motor bracket (item 48-1), the spare tire carrier (item 49), and the gauge mounting instructions (item 55) are all included. For a shop that maintains a fleet of these trucks, having the factory routing diagrams for the piping box assembly (item 22) and the water tank assembly (item 23) means you can rebuild a system without reverse-engineering a hacked-up truck.

Why OEM Parts Catalog Beats Aftermarket Lists

Aftermarket parts catalogs for Japanese construction equipment are a gamble. They often recompile data from multiple sources, miss revision letters, and list parts that were never actually fitted to the PH40-16. This document is the genuine Kyokuto Kaihatsu parts catalog—the same one the dealer uses. It comes from the factory computer system (KOINS) and uses the original Japanese part numbering. The note on page 1 warns that katakana characters are shown in uppercase; that is a clue that you are looking at the real deal. If you order using these part numbers, you get parts that were designed for the PH40-16 squeeze concrete pump truck. No compatibility issues. No returns.

For other Kyokuto Kaihatsu models, check the Kyokuto Kaihatsu PY21-50 Parts Catalog – 240 Pages of Factory Specs. If you need a different concrete pump variant, the Kyokuto Kaihatsu PH11-50 Parts Catalog – OEM Factory Specs covers a smaller machine. For the larger PY120-36, Kyokuto Kaihatsu PY120-36 Parts Catalog – 350 Pages | AutoRepairManuals gives you the same level of factory detail. The construction industry relies on accurate part data, and these catalogs deliver it. Automotive Industry Overview provides broader context on how OEM documentation supports fleet maintenance. Automotive Industry Overview is also a reference for industry standards.

Who Needs This Catalog and How to Use It

You are a shop owner or a technician who works on concrete pump trucks. You have a PH40-16 in the bay with a bad hydraulic motor or a cracked water pipe. You need the exact part number to order from your local Kyokuto Kaihatsu dealer. This catalog gives you that number along with the assembly diagram so you can verify that the replacement part matches the chassis configuration. Beginners should use this in conjunction with a service manual for torque specs and removal procedures—this catalog does not contain repair instructions. But if you are a DIY owner-operator maintaining your own truck, this catalog saves hours of cross-referencing and prevents ordering the wrong roller or seal. The language is Japanese, but parts diagrams and numbers are universal. A translator app or a experienced parts counter person can help you navigate the text.

Does this catalog include torque specifications or repair procedures?

No. This is a parts catalog only. It lists part numbers, quantities, and assembly relationships. For torque specs, oil capacities, and removal/installation steps, you need the factory service manual for the PH40-16.

How do I read the revision notations like “9811~”?

Those are production date codes. “9811~” means from November 1998 onward. “~9810” means up to October 1998. A blank space indicates no change. The catalog covers the entire production run from 1993 to 1998, so pay attention to these codes to get the correct part for your truck’s build date. If you ignore the revision, you may order a part that does not fit early or late chassis.

You need this catalog if you are serious about keeping a PH40-16 running on a job site without downtime from wrong parts. It is the only source that matches the factory’s own inventory system. Access the Factory Manual from AutoRepairManuals and keep it in your service office for every rebuild and component replacement.