Description

O&K TB 105, 4000E Parts Catalog – Factory Edition

If you’ve ever ordered a part that didn’t fit, you know the headache. Wrong bushing, mismatched seal, a hydraulic line that’s an inch too long – that’s hours lost and money wasted. This O&K TB 105, 4000E Parts Catalog is the document that stops those problems before they start. I’ve been turning wrenches for 28 years, and I can tell you: chasing part numbers without the factory book is a fool’s game.

What This Parts Catalog Actually Does

This is not a repair manual. It’s a parts identification book for the O&K TB 105 loader and the 4000E model. Inside, you get exploded-view diagrams and numbered parts lists that cover everything from the accelerator pedal linkage to the wiring harness. The entire catalog runs 238 pages, and each illustration is tied to a specific part number. You find the assembly – say, the air intake system – look up the page referenced in the index, and you see exactly which bolt, gasket, or hose you need. No guessing, no returns.

Why Serial Number Is the First Thing I Ask For

Page 2 of this manual has blanks for machine serial number, engine model, transmission, axles. That’s not decoration. O&K changed parts across production runs, and without the serial number you risk ordering something that doesn’t fit. The manual itself covers serial 4IE-3001 & up. If your machine falls outside that range, you need a different revision. Always check the serial number before you order any part – I’ve seen guys bolt on wrong brackets because they skipped this step.

3 Systems You Need to Identify Parts For

The index breaks the machine into logical groups. You get sections like Accelerator Pedal & Linkage, Air Cleaner, Alternator Mounting, Axle Assembly (Front and Rear), Battery & Wiring (Main), Brake Control and Lines, Bucket Cylinder Assembly, Controls (Main Hydraulic and Valve), Converter (Torque), and many more. The wiring section alone saves you from chasing the wrong harness. If you’ve ever tried to match a watertight connector without a diagram, you know what I mean.

Using the Manual: Index and Part Number Abbreviations

Page 3 explains the introduction: find the system in the index, then turn to the corresponding illustration. Page 4 defines the abbreviations – A.R. (As Required), N.S.S. (Not Serviced Separately), N.I. (Not Illustrated). These abbreviations matter. If you order a part marked N.S.S. as a standalone item, you’ll be waiting weeks for an assembly that you could have bought complete. The manual tells you which parts are sold only as part of a larger group, so you don’t waste time chasing individual pieces.

OEM Verification: Why Aftermarket Catalogs Fail

I’ve seen aftermarket parts lists that re-number items or skip illustrations. They’re useless when you’re standing under a machine with a broken bracket. This is the real O&K print – manual part number 2023089, revision 2. The diagrams match the machine on your shop floor. If you’re working on a TB 105 or a 4000E, this is the document you want. For other O&K models, check related titles like O&K L45, 4500Z 1990 Parts Catalog – Parts Manual TB126 or O&K L3000 Parts Catalog – Factory OEM Manual (236 Pages) and O&K L2500 Parts Catalog – Factory Specs for Part Ordering.

Wiring and Electrical: Don’t Guess the Connector

One section I always point to is Battery & Wiring (Main). The factory wiring diagrams show connector locations, wire colors, and grounding points. If you’re tracing a short or replacing a harness, having the correct part number for each connector saves you from splicing the wrong gauge. The manual also covers the Back-Up Warning Alarm and Clutch Cut-Out Switch – details that aftermarket catalogs often skip. You get the full electrical system laid out with OEM part numbers.

Over my career, I’ve watched guys waste entire days because they ordered the wrong cylinder or misread a parts diagram. This catalog kills that guesswork. The first time you use it, you’ll wonder why you ever ordered parts from memory. Trust the factory document, not your memory.

Does this manual include torque specifications?

No. This is a parts catalog, not a repair manual. For torque values, you need the service manual for the TB 105 or 4000E.

How do I find the correct part number for my machine?

Start with the machine’s serial number (stamped on the frame). Then locate the assembly you need in the index – for example, “Axle Assembly (Front)” – and turn to the page listed. The illustration shows numbered callouts, and the parts list below gives the part number, description, and quantity. Always include the serial number when ordering, because later revisions may use different parts. The manual itself covers serial 4IE-3001 & up, so verify your machine falls in that range.

Can I use this catalog for the TB 105 only or also the 4000E?

This manual covers both the TB 105 loader and the 4000E model. The title page lists “Parts Manual TB 105” and “MODEL 4000E”. If your machine is one of those, you’re good.

What is the difference between this OEM catalog and a generic parts list?

Generic lists often combine multiple models, skip diagrams, or use re-drawn sketches that miss details. This OEM catalog from O&K (manual part 2023089) has exact factory illustrations, part numbers from the original supplier, and the abbreviations (A.R., N.S.S., N.I.) that tell you how each part is sold. A generic list won’t tell you that a certain seal is only sold as part of the cylinder assembly. That kind of detail saves you from ordering a part you can’t get separately. The 238 pages are a straight copy of what the dealership uses.

External reference: For broader context on heavy equipment parts systems, see Automotive Industry Overview and Automotive Industry Overview.

You need parts for your O&K loader? Access the Factory Manual now. Stop chasing numbers from memory.