Description

O&K TB104 2000 Parts Catalog – Factory Parts Manual for TB104 Loader

If you’ve ever ordered a part for a machine this old and got the wrong one because some third-party catalog had a blurry drawing and no serial number breakdown, you know the headache. I’ve seen it: a guy pulls an axle seal, waits three days for the replacement, and it’s the wrong bore because the listing didn’t match his production year. This O&K TB104 2000 Parts Catalog puts that nonsense to bed. It’s the same 231-page binder that sat in the dealer’s parts department back when these loaders were still on the line. Every part number, every revision, every note about “N.S.S.” (not serviced separately) or “A.R.” (as required) is right there. You want the correct bucket cylinder seal kit? You find it by frame serial number, not by guessing. That’s real value when you’re billing a shop or keeping your own machine running.

Engine and Air Intake Sections – GM vs. CD Variants

The manual breaks down the accelerator pedal and linkage into two separate sections: one for GM engine (pages 36-37) and one for CD engine (pages 38-39). Same goes for the air cleaner and air intake system – GM on page 27A, CD on page 2713. That might annoy you if you’re in a hurry, but it’s exactly why this catalog works. You don’t mix up a GM air cleaner housing with a CD one; the part numbers are distinct. If you’re working on a TB104 that’s been repowered or swapped, you need to know which variant you have. This catalog forces you to check the engine model before ordering. That’s a good thing.

Transmission and Brake Groups – What the Illustrations Show

Pages 66 through 76J cover the transmission control valve assembly. That’s ten pages for one assembly because each solenoid, spring, and spool gets its own callout. The parking brake assembly runs pages 128-133, and the brake group axle spreads across 158-161. You get exploded isometric views with leader lines to part numbers. There’s no “this looks like it fits” – you match the number from the diagram to the list. If you need the clutch cut-out switch, it’s on pages 156-157 with its own bracket and wiring. The manual also includes the automatic hoist cut-out (page 77) and automatic bucket leveler (pages 174-175). For a loader that’s been through twenty years of abuse, these sections save you from buying a whole valve bank when you only need a spring.

Bucket Assembly and Cylinders – Critical for Wear Parts

Bucket assembly and attachments are pages 21-210. That’s a huge spread because the bucket itself, the cutting edge, the teeth, and the pins all have separate part numbers based on the bucket type. The lift cylinder (pages 80-81) and bucket cylinder (pages 22-23 – note: that’s the same page range as the axle cradle, so check the index carefully). The index at the front of the manual tells you which illustration contains the part you want. That’s the old-school way, but it works. If you’re rebuilding a cylinder, you get the seal kit number from the cylinder assembly page, not from a generic kit that might leave out the wiper seal.

Electrical and Hydraulic Controls – Wiring and Valve Details

Battery and main wiring are pages 56-58A, with a separate section for the watertight connector (pages 122-123). The alternator mounting differs between GM and CD – page 31 for GM, page 35 for CD. The control valve console is pages 124-125, and the main control valve assembly runs pages 108-109. There’s also an air shift (reverse to forward) on pages 109A-109B. If you’re chasing a hydraulic drift or a shifting problem, you need the valve bore sizes and spring part numbers from these pages. I’ve seen guys waste a day cross-referencing aftermarket hydraulic catalogs that lump all TB104 valves together, only to find the shift valve is different on their serial number range. This manual splits by serial – “Serial No. 20 – 1998 and up” is printed right on the cover.

Audience Fit – Who Needs This Manual?

If you own a TB104 loader and you’re not a dealer, you need this. Independent mechanics who take on old loaders will save chargeable time by not chasing wrong parts. Home-garage guys who bought a surplus TB104 – you will get stuck ordering a brake line from a generic listing that says “fits TB104” but doesn’t match your axle serial number. This catalog forces you to look up the front and rear axle part numbers (pages 154-155 & 168A) and record them on the machine’s serial page. The manual has a blank page (page 2) for writing in your engine model, transmission part number, and axle serials. Fill that in, and you’ll never order the wrong axle shaft.

Beginners: don’t be afraid of the index. It’s a plain list of systems like “Air Reservoir Piping (GM) 134-136” and “Air Reservoir Piping (CD) 138-139”. You find your system, flip to the page, and see the parts. The manual includes abbreviations like N.S.S., A.R., and N.I. (not illustrated). Read the intro on page 3 – it explains them. That’s the kind of manual that respects your time.

Source Validity – Factory OEM vs. Aftermarket

This is an original factory Parts Catalog published by Trojan Industries Inc. in 2000, revision 2. The cover says “Parts Manual TB104, Serial No. 20 – 1998 and up.” It’s not a reprint from a third-party who scanned a photocopy. The PDF we sell is a direct image of the printed manual – no OCR errors, no missing pages. I’ve compared aftermarket catalogs for the TB104: they leave out the revision notes and don’t show the “N.S.S.” callouts, which means you might order a part that’s only sold as an assembly. That’s how you end up with a $200 valve body instead of a $12 o-ring. If you value your time, you pay for the factory book once. Related manuals that cover other O&K loaders include O&K L45, 4500Z 1990 Parts Catalog – Parts Manual TB126 and O&K L3000 Parts Catalog – Factory OEM Manual (236 Pages), as well as O&K L2500 Parts Catalog – Factory Specs for Part Ordering. For context on why OEM parts documentation matters in the broader Automotive Industry Overview, this is how the pros avoid downtime. Automotive Industry Overview covers the shift toward standardized catalogs, but this manual predates that – it’s pure paper-based serial number tracking.

FAQ – Four Common Questions

Does this catalog cover the TB104 with the GM engine and the CD engine in one book?

Yes. Both variants are covered in separate sections. Air cleaner, accelerator linkage, alternator mounting, and air intake each have dedicated pages for GM and CD. You have to use the correct section based on your engine model.

How do I find the part number for the automatic bucket leveler linkage?

Pages 174-175. Look up “Automatic Bucket Leveler & Indicator” in the index. The illustration shows the linkage arms and the indicator rod; the parts list gives the part number. Note that some components may be N.S.S. (not serviced separately).

What serial numbers are covered?

Serial number 20 and up, built from 1998 onward. The manual was published in 2000, so it covers machines produced through that year. Always verify your machine’s serial number on the frame plate.

Is there a wiring diagram in this parts catalog?

No. This is a parts catalog, not a service manual. It shows battery and main wiring on pages 56-58A, but the illustrations are for identifying wire harness assemblies and connectors, not circuit schematics. You’ll need a separate service manual for electrical diagnostics.

You see the value? The part numbers are tied to serial numbers and engine variants. No more blind ordering. If you’re ready to stop guessing and start getting the right part the first time, Access the Factory Manual. It’s a PDF, you can search it, print pages for the job, and keep the whole thing on your tablet. That’s what we do in the shop – pull it up, zoom in on the axle group, order the seal. Get it done.