Description

Eaton Single Reduction 1994 Parts Catalog – What a Workbench Needs

I’ve had more than a few guys roll into my six-bay shop with an axle they’ve torn apart using some third-party parts list they obtained somewhere. Half the time the part numbers don’t match, the exploded view is flipped, or they forget there are two different bearing kits for the same housing because the tag wore off. That’s where this Eaton Single Reduction 1994 Parts Catalog comes in. It’s the book Eaton put together so you can find exactly what you need without guessing. 24 pages, printed April 1994, and it covers the Dana Spicer tandem axles in the 34,000 to 45,000 lb range. If you’re overhauling a single reduction carrier, you want this on the bench, not a smartphone screenshot of a PDF from some forum.

How to Use This Parts Book

Page 2 of the catalog spells it out: start with the table of contents for your axle model or series, then turn to the applicable page. Every part is shown in an exploded view with an item number. That number links to a list with the part name and the factory part number. Some parts are identified as NSS (Not Serviced Separately) — you only get them in a kit. Others are marked AR (As Required) for shims and such that vary per axle. This is not a service manual; it’s a parts identification book. You still need the actual service specs for torque values and clearances.

34,000–45,000 lb Axle Coverage

The catalog specifically covers Eaton Single Reduction axles in that weight class. That covers a lot of Class 8 trucks from the mid-90s. If you’re working on a Roadranger or Dana Spicer tandem and need to find a differential carrier assembly, axle housing part, or shift control component, this book has the exploded view. It also includes special-design parts and assemblies. Don’t expect to find every nut and bolt here — it’s a parts catalog, not an inventory checklist.

Abbreviations and Symbols You’ll See

Page 2 gives you the abbreviations you need: NSS, AR, RH/LH (right hand/left hand as viewed from behind the vehicle looking forward), and RTV (silicone gasket compound). The catalog uses a star symbol for parts included in a Carrier Basic Overhaul Kit, and a bullet for parts in a Bearing Kit. These symbols are right in the exploded views. If you see a star next to an item, that part comes in the major overhaul kit. That’s how you cross-reference what you’re ordering without buying duplicates. Genuine Eaton parts only.

Eaton Parts Kits: Overhaul and Bearing Kits

Eaton designed these kits so you can stock one part number and get everything for a complete overhaul. The Carrier Basic Overhaul Kit includes all the gaskets, seals, bearings, and fasteners you need to rebuild a single reduction carrier. The Bearing Kit covers the differential bearings. The catalog shows which parts are in each kit. This is a real time-saver when you’re doing a job in the bay and you don’t want to piece together twenty different part numbers. Page 2 explains the kit concept. Don’t order parts directly from Eaton — the book says to go through your dealer or OEM. That’s standard for heavy-truck parts.

Why This Beats Aftermarket Lists

Aftermarket parts catalogs are usually scanned copies with faded numbers or they’ve been re-typed and lose the OEM part number. This is a direct copy of the Eaton-issued AXIP-0089 Parts List. It uses the same exploded view layout that Eaton’s own service centers use. I’ve seen aftermarket catalogs list a standard bearing number that doesn’t account for the Eaton-specific carrier machining. Then you install it, and the preload is off. This manual gives you the correct Eaton part number so you order the right bearing that matches the original spec. That is the difference between a job done once and a job done twice.

FAQ: What You Need to Know

Does this catalog include torque specs?

No. This is a parts identification catalog, not a service manual. You need the separate service manual for torque values and assembly procedures.

Can I use this for a Dana Spicer axle that isn’t branded Eaton?

The catalog covers the Roadranger / Dana Spicer tandem axles built under the Eaton-Dana joint venture. If the axle tag says “Single Reduction” and the rated capacity falls between 34,000 and 45,000 lbs, it’s likely covered.

What is the difference between NSS and AR?

NSS means the part is not sold separately – it’s only available as part of a kit (e.g., ring gear sets). AR stands for “As Required” – parts like shims that vary in quantity per axle. You order AR parts by the count you need.

How do I know which parts kit I need – overhaul or bearing?

Look at the exploded view for your specific axle model. Parts marked with a star are in the Carrier Basic Overhaul Kit. Parts marked with a bullet are in the Bearing Kit. If you’re doing a full carrier overhaul, get both kits and compare the included parts to the exploded view.

Get the Factory Document on Your Bench

I worked on trucks for fifteen years before I learned the hard way that an aftermarket parts list can cost you an entire afternoon. When you buy genuine Eaton parts with the correct part number, the job goes together right the first time. This 24-page catalog gives you the same information the dealer’s parts counter uses. Access the Factory Manual and keep it with your tools.

Related manuals for your shop: Eaton RTLO-16618A 2010 Parts Catalog – Factory Breakdown for Truck Shops, Eaton RT-8908LL 2006 Parts Catalog – Factory PDF Manual, Eaton RTXF 2011 Parts Catalog – Factory Parts Breakdown

For background on heavy-duty drivetrain engineering, see the Automotive Industry Overview and also Automotive Industry Overview for general context.