Takeuchi TB125, TB135, TB145 Operators Manual

If you are running a Takeuchi compact excavator—TB125, TB135, or TB145—and you don’t have the factory Operators Manual on hand, you are flying blind. Takeuchi TB125, TB135, TB145 Operators Manual is 263 pages of the same material that came strapped to the machine from the factory. I have seen more than a few guys ruin a hydraulic line because they guessed at the control pattern or skipped the pre-start check. That is what this book stops.

Safety Signals: DANGER, WARNING, CAUTION

Page 2 of this manual lays out the safety alert symbol and the signal words. DANGER means you will die. WARNING means you might die. CAUTION means you could get hurt or damage the machine. Every operator needs to know the difference before they touch the ignition. The manual tells you to store it on the machine and to read it before operating. That is not lawyer talk—that is how you keep yourself alive.

Serial Number Verification for Your Machine

Three serial number ranges are listed: TB125 from 12510003 onward, TB135 from 13514051 onward, and TB145 from 14513261 onward. If your machine falls outside those ranges, this manual may still apply, but you should cross-check with your dealer. The book number is AG4E022. I always tell guys to write that number inside the cover so you can order the right replacement if the manual walks off.

263 Pages of Factory Content

263 pages is what you get. That is not a condensed quick-start card. It covers pre-operation inspection, control functions, daily maintenance, and transport procedures. Page 1 shows the machine identification plate locations. The manual is a direct reproduction of the Takeuchi publication, not a third-party rewrite. When the manual says “check the hydraulic oil level before starting”, it expects you to do it every time. Aftermarket manuals leave that stuff out. This one does not.

Pre-Operation Inspection Requirements

Page 1 also carries a bold WARNING: read and understand these instructions. Failure to do so can cause injury or death. That is not dramatic—I have pulled a guy out of a trench because he skipped the pre-operation walk-around. The manual spells out what to look at: fluid levels, track tension, safety decals, and control function. It also instructs owners to train each operator and to keep the manual on the machine. If you are a shop owner or fleet manager, that is your liability protection right there.

Does This Manual Cover Maintenance?

Yes, it covers daily and periodic maintenance that an operator can perform, like greasing fittings, checking filters, and inspecting belts. But understand—this is an operators manual, not a workshop manual. For disassembly, rebuilds, and torque specs, you need the Takeuchi TB125 TB135 TB145 Workshop Manual. If you need parts breakdowns, grab the Takeuchi TB125 Parts Catalog. And if you have a TB145 and want to cross-reference with the TB150, the Takeuchi TB145 TB150 Technical Manual is available separately. For background on how a manual transmission works in construction equipment, read the Wikipedia article on Manual Transmission and also the explanation on Manual Transmission.

FAQ

Can I use this manual for the TB150?

No. This covers only TB125, TB135, and TB145.

Is this a reprint or a copy?

It is a direct reproduction of the original Takeuchi publication. The 263 pages include the full safety section, serial number ranges, control descriptions, and maintenance schedules exactly as they appear in the factory binder. There are no missing pages, no scanned-in blur, and no aftermarket interpretations. If you are used to cheap PDFs that skip the safety warnings, this is the opposite.

So do yourself a favor. Stop running your Takeuchi excavator on guesswork and memory. Download the Factory Manual from AutoRepairManuals and keep it in the cab. Your machine will last longer, and you will walk away at the end of the shift.