Description

O&K 1500 1975 Parts Catalog

If you’ve ever tried ordering a part for an O&K 1500 and got sent the wrong hydraulic fitting or a drive sprocket that doesn’t match, you know the headache. That happens when you chase parts by eyeballing a blurry online photo instead of using an OEM parts catalog. This O&K 1500 1975 Parts Catalog is the factory-issued document – not a third-party reprint, not a scan of a scan. It’s the same manual the dealer would pull off the shelf back in ’75, with 154 pages of exploded drawings, part numbers, and ordering instructions that match your machine’s serial number.

Parts Identification by Serial Number

Page 2 of this manual has blank fields for Machine Serial Number, Engine Model, Transmission Part No., and axle numbers. That’s not decoration – you fill those in because every part order you place must include the machine serial number. O&K/Eaton upgraded the 1500 loader constantly, so using the serial number is the only way to guarantee you get the correct steering valve or bucket pin. Without it, you’re gambling with your time and money.

How the Index and Illustrations Work

Page 3 explains the index system. You find the basic system (engine, transmission, hydraulics) in the front index, then flip to the page number listed. Each illustration clearly labels every part with a callout number that corresponds to the parts list table. The table gives you the part number, description, quantity per machine, and any usage notes. Want to order a seal kit for the lift cylinder? You’ll see exactly which O-ring and backup ring belong there, with the right part number written out.

Understanding the Parts List Abbreviations

The manual uses three abbreviations you need to know: A.R. (As Required – quantity varies), N.S.S. (Not Serviced Separately – sold only in an assembly), and N.I. (Not Illustrated – used but not shown in the drawing). These keep you from ordering a part you can’t get alone, or ordering a handful of bolts when the job only needs one. Ignore them and you’ll end up with a box of parts you can’t return.

OEM vs Aftermarket: Why Factory Documentation Matters

Third-party parts catalogs for the O&K 1500 often crop illustrations, omit revision notes, or mix up part numbers. This manual was printed by Eaton’s Construction Equipment Division in October 1975 – the same people who designed and built the machine. It includes Revision 1 updates from the factory. When you open page 3, you see the message: “Use only parts which are authorized by Eaton… to assure original dependability.” Aftermarket catalogs don’t carry that authority. You’re not saving time by guessing; you’re inviting downtime.

What’s Inside: 154 Pages of Factory Specs

The 154 pages cover the complete machine: powertrain, hydraulics, steering, brakes, electrical, frame, bucket and attachments. Each system gets its own section with detailed exploded views. You’ll find the correct part number for the transmission control valve, the front axle shaft, the O-ring for the steering cylinder. The manual also includes operating instructions – not a repair procedure, but the assembly and disassembly guidance you need to identify what you’re looking at. If you’re restoring an O&K 1500 or keeping one in service, this catalog is the foundation of every parts order.

How This Manual Saves You from Wrong Orders

I’ve seen guys order a “steering pump” for the 1500 and get a pump from a later model that has different mounting ears. The mounting ears look the same in a crappy photo, but the part numbers are different. With this manual, you look up the steering system illustration, find the pump callout, cross-reference the part number, and call your dealer with that number. No guessing, no returns. The Automotive Industry Overview tells you how standardization helps, but only a factory catalog locks you into the exact spec.

Related Manuals for the O&K 1500

• O&K 1500 Parts Catalog – same manual, additional copies available
• O&K 1500 Technical Manual – service procedures and specifications for repairs
• O&K Model 1500 Parts Manual TB089 – alternate parts manual with different revision level

Need more background on heavy equipment documentation? See Automotive Industry Overview on Wikipedia for a broader context on OEM parts catalog systems.

Frequently Asked Questions

Does this manual include torque specs for bolts?

No. This is a parts catalog, not a repair manual. It lists part numbers and quantities, not tightening values. For torque specs you’d need the service manual.

Will this manual cover my O&K 1500 with a later serial number?

The manual is based on the machine design as of October 1975. If your loader was built after that date, some parts may have been superseded. You must provide the serial number to your parts supplier to verify compatibility – the manual includes the original part numbers but later revisions exist.

Can I use this manual to order parts from an aftermarket supplier?

You can, but be careful. Aftermarket suppliers often cross-reference OEM numbers to their own. Using the factory part number from this catalog gives you the best chance of getting a matching component. The manual explicitly states to use only Eaton-authorized parts for original dependability.

How do I get the best price on parts with this manual?

Call multiple dealers and give them the exact part number from the catalog. Some dealers discount OEM parts. Also check online surplus suppliers – having the factory number speeds up their search. The manual does not list prices, only part numbers and descriptions.

Stop wasting time returning wrong parts or piecing together a parts list from memory. Access the Factory Manual now and keep your O&K 1500 running with genuine Eaton-specified components.