Description

O&K 1900 Parts Catalog – Factory OEM Parts Manual & Operating Instructions

If you have ever ordered a part for an O&K 1900 loader and received the wrong one, you know the frustration. I’ve been turning wrenches for 28 years, and the number one cause of downtime on older equipment like this is chasing the wrong part number. This factory OEM Parts Catalog stops that. It’s the same book the dealer used back when these machines were new – 199 pages of exploded views, part numbers, and quantities that match exactly what came off the assembly line. No aftermarket re-draws, no guesswork.

3 Critical Sections You Cannot Skip

The manual opens with operating instructions and safety. Page 4 covers Safety Precautions – read that before you touch anything. Then you get the Torque Chart on page 144. I don’t care if you think you know the feel – on a loader this age, bolts torque to different specs than modern equivalents. Use the chart. The Lubrication Charts on pages 28-29 cover every grease point. Miss one and you’re buying a new pin next season.

Torque Chart on Page 144: Why You Need It

Page 144 lists torque values for every threaded fastener on the machine. Not generic foot-pounds – these are the OEM numbers for the O&K 1900. I’ve seen guys snap bolts on the front axle because they used a spec from a different loader. That’s a $2,000 mistake. The chart is part of the General Instructions section, right after Capacities, Pressures, Electrical System on page 12. You get the full picture: fluid capacities, system pressures, and then the torque values. No piecemeal info.

Does This Manual Cover the Electrical System?

Yes, and it’s not just a wiring diagram thrown in as an afterthought. The Electrical System is detailed on pages 70-71 under parts listing “Battery and Wiring”. It shows the battery, cables, and harness routing with OEM part numbers. If you’re troubleshooting a no-start on an old O&K, having the factory electrical breakdown saves hours of tracing wires. The manual also lists the Clutch Cut-Out Switch (page 129) and the Dual Brake Valve (pages 126-127). Every electrical component is in the index.

Ordering Parts from the Index

The index in the front is organized alphabetically by system. Want the Bucket Cylinder? Go to “B”, find the page references (86, 87, 87A). Each page shows an exploded illustration with callout numbers that correspond to the parts list. The list includes the part number, description, quantity per machine, and notes like A.R. (As Required) or N.S.S. (Not Serviced Separately). You will not order a “bucket cylinder seal kit” and get a whole cylinder – the manual tells you exactly what is serviced. Always give your machine serial number when ordering; revisions exist and this manual references them.

Use the Factory Specs, Not Aftermarket Copies

Aftermarket parts catalogs often mislabel or skip supersessions. This is the original O&K 1900 Parts Catalog, manual number TB067, part number 2022707. Published October 1975. It includes revisions (Revision 2 is bound in). The data comes from the Construction Equipment Division of Eaton, who built these loaders. You get the same information the factory service department used. For background on industrial equipment manufacturing, see the Automotive Industry Overview. Another perspective: Automotive Industry Overview.

Frequently Asked Questions

Can I use this manual for the O&K 1900 with a different engine?

No. This manual covers both GM and CD engine options but you must match your machine serial number to the correct section.

How do I find the part number for a bucket cylinder?

Look under “B” in the index, find Bucket Cylinder, then go to the referenced page (e.g., 86, 87, 87A). The parts list includes the part number, description, and quantity. Always check the serial number note if there are revisions. The manual has notes for A.R., N.S.S., and N.I. which indicate if a part is not serviced separately or not illustrated. That matters when ordering because you may need to buy an assembly instead of a single part. If you skip this step, you risk ordering a component that cannot be installed without other parts you don’t have.

Does the torque chart cover all bolts on the loader?

Yes, page 144 lists all standard fastener torque specs. Use them.

Is this manual the same as the service repair manual?

No. This is the parts catalog with exploded views and part numbers. It does not contain step-by-step removal or overhaul procedures. You want the separate service manual for those. But you need this catalog to order the correct replacement parts before you start the job.

Stop wasting time on wrong parts and cross-referencing aftermarket sites. The factory OEM manual is the only source that guarantees you get the right O&K components. Access the Factory Manual now and keep a copy near your toolbox. Your loader – and your wallet – will thank you.

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