2004 Takeuchi TB125 TB135 TB145 Operator's Manual (P/N AG4E028)

• Official OEM publication (Book No. AG4E028) covering 2004 Takeuchi TB125 (S/N 12514526~), TB135 (S/N 13514051~), and TB145 (S/N 14513261~) compact excavators, including cab and canopy variants with rubber crawler undercarriages.
• 267-page PDF serving as your primary reference for daily inspection, safety protocols, and routine maintenance intervals.
• Contains 13 safety decal location diagrams, detailed operator control layouts, and critical maintenance torque specifications.
• Features essential visual aids and reference tables, including maintenance charts, fuel and lubricant charts, rated lift capacity charts, machine dimensions drawings, operating range views, fuse layout schematics, lever pattern diagrams, and instrument panel layouts.
• Details specific factory options and critical assemblies such as the telescopic arm, hydraulic breaker, load safety device, immobilizer system, automatic crawler adjuster, water separator, slew bearing, and accumulator.

Operational Guidance and Safety Protocols

Getting a new operator familiar with the TB-series generation requires precise documentation. This manual details the essential daily inspection routines you need before firing up the machine. You will find walk-around checks, fluid leak identification, and proper engagement of the safety lock lever system. It breaks down primary applications like excavating, ditch digging, and leveling, alongside break-in period requirements for fresh units. Safety is paramount when operating heavy machinery; always ensure you fully understand the slope operation guidelines and power line clearance rules detailed in these pages to prevent accidents, injuries, or equipment damage. Before performing any maintenance or repairs under the machine, always set all working equipment against the ground and securely block the tracks.

Because shop environments demand speed, having this PDF directly on your diagnostic laptop or toughpad lets you verify fluid capacities or cabin and canopy control layouts right on the job site without leaving the machine. The text clearly maps out throttle lever adjustments, travel lever usage for specific turning maneuvers, and the steps for activating auxiliary hydraulic circuits. It also covers transport logistics, detailing ramp angle limits and tie-down procedures for secure transit between sites.

Specifications, Routine Maintenance, and Troubleshooting

Keeping your excavator out of the shop and on the dirt means sticking to the factory schedule. This document provides a complete fuel and lubricant chart with exact capacity values for engine oil, hydraulic tanks, and cooling systems across all three models. Need fastener specs? It lists tightening torque values for standard M6 through M20 hardware in both coarse and fine thread pitches.

You get quick access to highly specific technical data, such as the port relief valve's set screw torque (20 N·m / 14.5 ft-lb) or the ground pressure for the TB135 Cab model (27.1 kPa / 3.93 psi). Fan belt slack is specified at approximately 10 mm (0.4 in.) to maintain proper alternator tension.

To help you avoid expensive dealer visits, this guide provides clear, step-by-step instructions for routine service tasks you can handle in-house. It covers how to replace the travel motor gear oil, adjust rubber crawler tension, swap out bucket teeth and side cutters, and properly bleed the air from the fuel system. Should operational issues arise, a dedicated troubleshooting section helps you quickly diagnose warning lamp flashes, engine overheating, and dead battery issues, keeping diagnostic data readily available to expedite your repair process.