Adjusting crawler tension, doing the pre-shift walkaround, or chaining a compact excavator down for a trailer haul: that is the work this 263-page Takeuchi TB125, TB135, TB145 operator manual PDF (OEM ID AG4E022) is written to sit beside. Maintenance and specifications fill the largest share of the book, from service data and interval schedules to dimensions and operating range, while the safety chapter covers precautions from starting to transport. Lifting capacity tables let you check a load before the arm leaves the ground, and the options chapter covers the telescopic arm and air conditioner. Change the hydraulic oil return filter after the first 50 hours, then every 500, and torque the crawler tension grease discharge valve to 177 N·m (130 ft.lb.). One missing number can park a crew for a morning. Bookmarks jump straight to each chapter and the text layer finds service data fast, so the filters and fluids you order match your machine the first time.
What's Inside This Takeuchi TB125, TB135, TB145 Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 4 | Foreword, Manual Storage Compartment, Serial Numbers |
| Machine Description | 5-8 | Designated Operations, Machine Features, Break-In Period |
| Safety | 9-36 | Preparing Precautions, Starting Precautions, Operating Precautions, Stopping Precautions, Transporting Precautions, Maintenance Precautions, Safety Signs |
| Controls | 37-60 | Names of Components, Doors and Covers |
| Operation | 61-88 | Machine Operation, Operating Procedures, Handling Rubber Crawlers |
| Transport | 89-92 | Loading and Unloading, Securing the Machine, Transporting Posture |
| Maintenance | 93-136 | General, Service Data |
| Troubleshooting | 137-148 | Other Symptoms |
| Specifications | 149-192 | Main Specifications, Machine Dimensions, Operating Range, Lifting Capacities |
| Options | 193-254 | General Precautions, Telescopic Arm, Air Conditioner |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Crawler tension grease discharge valve tightening torque | 177 N·m (130 ft.lb.) | p. 114 |
| Battery charging temperature | 15°C (60°F) | p. 32 |
| Coarse Thread M6 x 1.0 Torque | 9.8 ± 0.5 N·m (7.2 ± 0.4 ft-lb) | p. 99 |
| Coarse Thread M8 x 1.25 Torque | 22.6 ± 1.1 N·m (16.6 ± 0.8 ft-lb) | p. 99 |
| Hydraulic oil return filter replacement interval | After first 50 hrs, Every 500 hrs | p. 97 |
| Fuel filter replacement interval | Every 500 hrs | p. 97 |
| Engine oil filter replacement interval | After first 50 hrs, Every 250 hrs | p. 97 |
| Air cleaner outer element replacement interval | Every 1000 hrs or after 6 cleanings | p. 97 |
| Air cleaner inner element replacement interval | Every 1000 hrs or after 3 cleanings of the outer element | p. 97 |
| Fan belt tension (force) | about 10 kg (22 lb.) | p. 112 |
| Fan belt slack | 8 to 10 mm (0.3 to 0.4 in.) | p. 112 |
Takeuchi TB125, TB135, TB145 Common Problems This Manual Covers
Takeuchi TB125/TB135/TB145 coolant temperature warning lamp flashes and engine overheats during operation
Check the cooling system using the overheat inspection procedure in the troubleshooting section before you restart. Then press at the center between the fan pulley and alternator pulley with about 10 kg (22 lb.) of force, as shown on page 112, and verify 8 to 10 mm (0.3 to 0.4 in.) of belt slack.
Manual Section: If the Engine OverheatsBattery dead and engine will not crank after the machine sat in freezing weather
Check the battery for freezing before you hook anything up. Warm a frozen battery to 15°C (60°F) before charging or jump-starting it, per the warning on page 32, or it may explode. Then connect the jumper cables in the order given in the dead battery procedure, start the engine, and remove the cables as that procedure directs.
Manual Section: If the Battery Goes DeadEngine cranks but will not start after running the fuel tank empty
Fill the tank, then bleed the air out of the fuel system using the procedure in the After the Fuel Runs Out section before you crank again. While you have the fuel side open, check the fuel filter against its service schedule. The maintenance parts table calls for a new element every 500 hours.
Manual Section: After the Fuel Runs Out p. 141Blown fuse or failed fusible link leaves an electrical circuit dead on the machine
Inspect and replace fuses using the fuse layout in the If a Fuse Blows section, and match the rating of the fuse you pull. If the fuses check good, inspect the fusible link, which is covered in the same section. If a new fuse blows right away, you have a short. Find it before you install another fuse.
Manual Section: If a Fuse Blows p. 142Air cleaner warning lamp keeps flashing after startup while the engine is running
Remove the outer air cleaner element and clean it with compressed air at 686 kPa (99.5 psi) or less, following page 119. Keep count of the cleanings. Replace the outer element every 1000 hours or after 6 cleanings, whichever comes first. Replace the optional inner element after 3 cleanings of the outer element.
Manual Section: Maintenance p. 119Engine stopped with the boom raised and the attachment will not come down
Follow the emergency boom lowering procedure on page 146 to bring the attachment to the ground with the engine stopped. Keep everyone clear of the boom and arm before you start. On TB125 and TB135 machines, tighten the port relief valve set screw back to 20 N·m (14.5 ft-lb.) once the boom is down.
Manual Section: To Lower the Boom p. 146Frequently Asked Questions
What are the replacement specifications for the hydraulic oil return filter on the Takeuchi TB125, TB135, TB145?
The hydraulic oil return filter element should be replaced after the first 50 hours of operation and then every 500 hours thereafter. The part number for the TB125 is 15511-00700, for the TB135 is 15511-03300, and for the TB145 is 15511-02600. p. 97
What is the correct torque for tightening M10 coarse thread bolts on the Takeuchi TB125, TB135, TB145?
For general connection points using coarse thread M10 x 1.5 bolts, the tightening torque is 47.1 ± 2.4 N·m (34.7 ± 1.7 ft-lb). p. 99
How do I adjust the fan belt tension?
The fan belt tension is correct if it bends about 8 to 10 mm (0.3 to 0.4 in.) when pressed at the center between the fan and alternator pulleys with a force of about 10 kg (22 lb.). Adjustment is performed by loosening the adjustment bolt (5) and locking nut (6) and moving the alternator (8) with a lever (7). p. 112
What is the procedure for bleeding air from the fuel system?
After adding fuel, turn the starter key to the ON position and hold it there for about 20 seconds. The automatic air bleeder will then bleed the air from the fuel system. p. 141
What is the tightening torque for the travel motor gear oil plugs on a Takeuchi TB125, TB135, TB145?
The tightening torque for the travel motor gear oil plugs is not explicitly listed in the table, but the grease discharge valve for the crawler tensioner requires 177 N·m (130 ft.lb.). For the bucket teeth side cutter bolts, the torque is 241 N·m (178 ft-lb). p. 114
Is this Takeuchi TB125 Operator Manual a digital download?
A 263-page Operator Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Can I print pages of this Takeuchi TB125 manual for my own shop?
Yes. Print a single page or a chapter for your own shop use, on letter or A4.
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