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This 493-page Takeuchi TB125 parts manual PDF (OEM #BE5Z010) is the factory parts catalog for your hydraulic excavator, matching every part number to an exploded view from crawler belt to bucket pins. Illustrated breakdowns cover the undercarriage (track rollers, front idler, track adjuster), slewing device and turntable, engine and electrical system, hydraulic piping and tank, covers and cab, plus the full hoe attachment: boom, arm, telescopic arm, and buckets. Hydraulic components get their own section: control valve block assemblies, every cylinder, travel and slew motors, and the pump, broken down to individual seals and O-rings. Serial splits are printed on each affected assembly, so a machine in the 12510009-12514525 range pulls a different turntable listing than one after 12514526. Ordering the wrong seal kit twice gets old fast. Bookmarked with a live text layer: type the part name, jump to the diagram, order it right the first time.
What's Inside This Takeuchi TB125 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Undercarriage | 16-49 | Lower Frame, Crawler Belt, Crawler Belt (with Rubber Pads), Carrier Roller (12510009-12513451), Carrier Roller (12513452-), Track Roller, Front Idler, Track Adjuster |
| Turntable & Control Lever | 50-101 | Slewing Device, Turntable (12510009-12514525), Turntable (12514526-), Boom Swing (12510009-12514525), Boom Swing (12514526-), Swing Stopper, Travel Lever, Swing Pedal |
| Engine & Electrical System | 102-159 | Engine & Accessories (12510009-12514525), Engine & Accessories (12514526-) |
| Hydraulic Pipng & Tank | 160-203 | Grease Piping, Valve & Accessories, Piping; Upper (12510009-12512125), Piping; Upper (12512126-12514525) |
| Cover & Cab | 204-279 | Cover (12510009-12514525), Cover (12514526-), Cover (Engine Hood), Cover (Front Cover), Floor Frame, Seat Box (12510009-12514525), Seat Box (12514526-) |
| Hoe Attachment | 280-314 | Boom (12510009-12514525), Boom (12514526-), Arm, Telescopic Arm, Bucket 1, Bucket 2, Bucket (for U.S.A.; 12510009-1251#) |
| Decal & Tool | 315-369 | Decal (Canopy) (12510009-12514525), Decal (Canopy) (12514526-), Decal (Cab) (12510009-12514525), Decal (Cab) (12514526-), Decal (for Japan) (12510009-12514525) |
| Hydraulic Device | 370-467 | Swivel Joint (12510009-12514525), Swivel Joint (12514526-), Control Valve, Block Assy; No. 1, Block Assy; No. 2, Housing Assy, Block Assy; No. 3, Block Assy; No. 4 |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine variants covered | 3TNE82A-TB / 3TNE82A-ETB | p. 103 |
| Bulb rating | 14V, 1.4W | p. 117 |
| Slewing device shim thickness (selective) | 1.2mm / 2.0mm / 3.2mm | p. 193 |
| Turntable shim thickness (selective) | 2.3mm / 4.5mm | p. 209 |
| Boom pivot shim thickness (selective) | 0.2mm / 0.5mm | p. 282 |
Takeuchi TB125 Common Problems This Manual Covers
Takeuchi TB125 hydraulic hose part numbers hard to identify, upper piping diagrams look identical between versions
Check the hydraulic parts diagram on page 162 before ordering any hose. Match your serial number to the correct listing: Piping; Upper (1/2) covers machines 12510009 through 12512125, and a revised listing starts at serial 12512126. Order by the item callout in the exploded view, then verify the fitting count against your machine.
Manual Section: Hydraulic Pipng & Tank p. 162Carrier roller replacement part unclear, two different rollers listed for the same machine
Verify your serial number before ordering. The parts list shows one carrier roller for machines 12510009 through 12513451 and a different roller from serial 12513452 onward. Check the chassis parts diagram on page 16, then confirm the item number in the Undercarriage parts list on page 17. Do not assume the two rollers interchange.
Manual Section: Undercarriage p. 16Engine gasket and accessory part numbers differ between early and late machines, listings confusing
Check page 103 first: machines 12510009 through 12510451 carry the 3TNE82A-TB engine, and serial 12510452 onward carry the 3TNE82A-ETB. Identify which engine you have before pulling any number from the engine parts diagram on page 102, because the accessory listings split at the same serial break and the parts do not cross over.
Manual Section: Engine & Electrical System p. 103Instrument panel bulb burned out and the rating stamp on the old glass is unreadable
Replace the bulb with the 14V, 1.4W rating listed on page 117; do not substitute a 12V automotive bulb on guesswork. Find the bulb item number in the Engine & Electrical System listings, and pull the fuse and wiring harness part numbers from the same section while the panel is already open.
Manual Section: Engine & Electrical System p. 117Boom cylinder weeping oil, need the correct seal kit contents and part numbers
Check the Hydraulic Device section starting on page 370 for cylinder exploded views covering boom, arm, telescopic, bucket, dozer blade, and swing cylinders. Match the listing to your serial range, 12510009 through 12514525 or 12514526 onward, then order every seal shown in the cylinder view, not just the one that is leaking.
Manual Section: Hydraulic Device p. 370Frequently Asked Questions
What is the replacement specification for the air cleaner element?
The replacement air cleaner element for the TB125 is part number 19111-02772, which is a Donaldson P82-2858 filter. p. 113
What is the part number for the rubber crawler belt?
The rubber crawler belt for the TB125 is part number 19140-67600 for serial numbers 12510009 to 12513553, and part number 19140-67900 for serial numbers 12513554 and higher. p. 19
What is the thickness of the shim t=1.0 for the turntable?
The shim with a thickness of 1.0mm for the turntable is part number 04330-10610. p. 53
What is the part number for the boom cylinder for serial numbers 12514640 and higher?
The boom cylinder for serial numbers 12514640 and higher is part number 19000-93300. p. 415
What is the part number for the starter switch on a cab model?
The starter switch for the cab model is part number 17001-00023. p. 117
How quickly can I access this Takeuchi TB125 manual after buying?
Immediate download of the complete 493-page searchable Parts Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Am I able to print pages from this Takeuchi TB125 manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
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