Description

O&K 1500Z Parts Catalog

I’ve been wrenching long enough to know that ordering the wrong part for a loader will cost you a full day and a quarter of your temper. This O&K 1500Z Parts Catalog is the only document that tells you exactly which part number, name, and group matches the machine in your bay. Without it, you’re throwing darts at a parts counter. The catalog runs 313 pages, covers serial T19-1501 and higher, and was printed by O&K Trojan in May 1990. That’s OEM documentation, not some scanned copy from a third party that guesses at numbers.

You need this catalog for one reason: when you open the box, the part fits. The manual organizes every component by group numbers — the first two digits point you to the system (Hydraulic, Powertrain, etc.), the next pair narrows the assembly, and the last two digits nail the specific part. That’s how factory parts manuals work. No cross-referencing aftermarket websites that might have updated supersessions wrong. You get the original O&K group numbers printed on page 3 of the manual, exactly as they were when the loader left the factory floor.

Group Number System: Finding the Right Section

Every mechanic I know hates flipping through unindexed PDFs. This catalog has a printed index at the front (page 3) that lists every basic system — Hydraulic, Powertrain, Frame, etc. — and the corresponding group numbers. Example: Group 32 M 01. The “32” tells you it’s Hydraulic System, “05” means Hydraulic Tank Assembly, “01” points to the Hydraulic Filter. You turn to that illustration, find the item number, and order. That’s it. No guesswork. No searching third-party databases that show a picture that looks close but isn’t.

The group numbers are printed next to every illustration. If you’ve ever tried to order a part from a machine that had been repainted or had swapped components, you know how fast things go wrong. This catalog locks you into the original build configuration.

Why Serial Number Matters for Parts Orders

O&K changed components during production. The manual makes it explicit: you must include the machine serial number with every order. Page 4 of the catalog spells out exactly what information to provide: machine model number, serial number, part number, part name, quantity, and shipping address. Skip the serial number and you risk getting a part that fits a different production run. I’ve seen guys order a transmission seal for a 1500Z and end up with the wrong diameter because they didn’t match the serial range. This catalog covers S/N T19-1501 and higher — if your machine falls in that range, you’re covered. If not, you need the correct serial-range catalog.

That serial number requirement isn’t bureaucracy. It’s how O&K kept the parts system accurate across decades of production. Trust it.

313 Pages of Factory Part Numbers

Three hundred and thirteen pages. That’s not a quick reference card. That’s a complete breakdown of every nut, bolt, hose, cylinder, filter, and electrical component on the 1500Z loader. The catalog lists each part with its OEM part number, description, and sometimes note about supersession. You won’t find generic descriptions like “filter element” — you’ll see the exact O&K part number and the item number on the illustration. This level of detail means you can hand the part number to your dealer and get the right piece the first time.

Because the catalog is original OEM material, you aren’t dependent on aftermarket publishers that might have introduced typos or copied incorrect numbers. The group index is consistent with other O&K manuals of the era, so if you also work on an L45 or 4500Z, the numbering logic carries over.

Authorized Parts Only: Avoid Aftermarket Mismatches

Page 4 of the manual includes a warning I want you to read twice: “USE ONLY PARTS WHICH ARE AUTHORIZED BY O&K TROJAN INDUSTRIES TO ENSURE THAT ORIGINAL DEPENDABILITY AND PERFOR…” The sentence cuts off in the scan, but the meaning is clear. Aftermarket parts that don’t match the OEM spec can cause alignment issues, hose routing problems, or premature failure. This catalog gives you the authorized numbers so you can ask your supplier for the genuine O&K part or a correct cross-reference.

If you’re a shop owner with a 1500Z in the fleet, or a mechanic who sees these loaders regularly, keep this catalog on the same bench as your service manual. The two work together: the service manual tells you how to take it apart, the parts catalog tells you what to put back in.

Who Needs This Catalog and Why

If you own a 1500Z, you need this. If you work on them for a living, you need this. The beginner DIY mechanic who bought an old 1500Z at auction will save three times the cost of this manual on the first order that doesn’t get returned. Professionals lose billable hours when a wrong part arrives — this catalog eliminates the back-and-forth. For workshop owners with multiple loaders, having the correct part numbers on hand means less downtime for the machine and less time on the phone.

I’ve used OEM parts catalogs for twenty-eight years. They aren’t flashy. They don’t have color photos. But they have the numbers that work. That’s all that matters when the machine is down and the customer is waiting.

Related Manuals You Might Need

If you’re building up a library for O&K equipment, these factory manuals pair well with the 1500Z parts catalog:
• O&K 1500Z 1990 Parts Catalog – Factory OEM Shop Manual
• O&K L45, 4500Z 1990 Parts Catalog – Parts Manual TB126
• O&K L3000 Parts Catalog – Factory OEM Manual (236 Pages)

For context on why factory documentation matters in the automotive industry, see Automotive Industry Overview.

Frequently Asked Questions

Does this parts catalog include repair procedures or torque specs?

No. This is a parts catalog — it lists every OEM part number, name, and illustration reference for ordering. For removal, disassembly, and torque values you need the corresponding O&K 1500Z service repair manual. The two manuals are designed to work as a pair.

What if my 1500Z has a serial number below T19-1501?

This catalog covers only S/N T19-1501 and higher. O&K made changes during production. If your machine is earlier, you need the catalog that covers your serial range. Ordering from this one could result in wrong parts because the group numbers or part supersessions may differ.

How are the illustrations organized?

Each assembly has an exploded-view line drawing with item numbers. The parts list on the facing page matches those item numbers to OEM part numbers, quantities, and descriptions. The index at the front helps you find the right group — for example, “Hydraulic System (Group 32)” then within that “Hydraulic Tank Assembly (32 05)”.

Can I use this catalog to order parts online from non-O&K dealers?

Yes. The part numbers are the original O&K numbers. You can supply them to any dealer or parts website that supports OEM cross-referencing. Some aftermarket suppliers may have supersessions, but the catalog gives you the starting point that is correct for your machine serial.

The 1500Z is a solid loader, but it’s only as reliable as the parts you put into it. Get the factory numbers right from the start. Access the Factory Manual and keep it on the bench next to your service manual. You’ll thank yourself the first time a customer brings in a 1500Z and asks for a complete brake rebuild — you’ll have every part number in hand before you touch a wrench.