Takeuchi TL120 Parts Catalog

If you are ordering parts for a Takeuchi TL120, you need factory part numbers, not aftermarket guesses. I have seen too many jobs stop cold because a guy bought a bearing that was close but not the right diameter. That mistake costs a day of tear-down and reorder. This OEM Parts Catalog – 229 pages – is the only reference that gives you the exact Takeuchi numbers for every bolt, seal, roller, and hose. The book is organized by assembly, not by random alphabetical guesswork. Serial number range starts at 21200008- for the 4TNV84T-XTBL engine. Use your machine’s serial number to verify the correct revision.

Engine for TL120 (4TNV84T-XTBL) – Section 10

The engine section is paginated separately starting at reference 0-1, but the parts breakdown covers everything from the block to the injection pump. Page 0-1 of the index lists the main groups: Undercarriage, Main Frame & Control Lever, Engine & Electrical System, Hydraulic Piping & Tank, Cover & Cab, Attachment, Decal & Tool, Hydraulic Device, and Engine (4TNV84T-XTBL). Note the serial number cutoff – this catalog applies to TL120 machines with S/N 21200008- built after July 21, 2008. If your machine is older, verify that the part revisions match. The engine section includes part numbers for injectors, gaskets, and the turbocharger assembly. Do not order a fuel injection pump without checking the service remarks column – some are superseded.

Undercarriage Parts Group – Track Roller Breakdown

Page 1-2 shows the track roller assembly with reference T3A020. Each component has a Takeuchi part number: roller sub-assy (0880135100), cover (0880132400), nut (0880133500), bearing (1432500660), floating seal (1432500661), O-ring (1432500662), retaining ring (1220000035), plug (1501810001), set-screw (1121340608), bolt (1100051645), washer (1141540016). If you need a track roller, the catalog tells you exactly which sub-assembly to order – no guessing between metric and inch threads. The sprocket and idler sections follow the same format with exploded diagrams and part numbers keyed to the index.

Hydraulic System Components – Piping & Tank

Section 4 covers hydraulic piping and tank. The catalog breaks down the main control valve, pump, filter, and tank assembly. For a machine that sees rental duty or heavy digging, hydraulic leaks are common around O-ring fittings. This parts catalog lists the O-ring size and material spec for each joint. Do not use a generic O-ring kit – the durometer and compound matter. The tank section includes the breather cap, strainer, and return line. Each item has a quantity column, so you know whether you need one or two of a given clamp. Check the channel column for design changes – Takeuchi updates parts by serial number prefix. Ignore that and you get a bolt that is 5mm too short.

Main Frame & Control Lever – Section 2

Structural components are rarely the reason you open a parts catalog, but when a control lever bracket cracks or a pedal linkage wears out, you need the exact bushing and pin. Section 2 covers the main frame, cab mounts, floor plate, and control lever assemblies. The parts are listed with dimensional reference drawings that show bolt patterns and torque values are in the service manual companion – Takeuchi TL120 Workshop Manual – Section: Engine covers the torque specs for those bolts. For part numbers alone, this catalog gives you the correct weldment and hardware. The decal and tool section (Section 7) includes safety labels and the tool kit contents – useful if you are restoring a machine and missing a decal.

Cover & Cab and Attachment – Sections 5 & 6

The cab section includes glass seals, latch handles, heater plenum parts, and the ROPS structure. As a mechanic, I have seen guys replace a whole cab door because they could not find the weatherstrip part number. This catalog lists the weatherstrip by length and profile. Section 6 covers the attachment – the quick coupler, bucket linkage, and hydraulic cylinder mounting brackets. Each pin, bushing, and snap ring has a part number. The attachment section is cross-referenced with the hydraulic device section (Section 8) for the cylinder rebuild kits. Do not order a cylinder seal kit without checking the Serial No. column – there are two seal revisions on the TL120. Page 0-1 of the index will show you where to look.

Check the Serial Number Before Ordering

The catalog’s index on page 0-1 lists the serial number threshold: 21200008-. Parts after that may differ from early production. The OEM catalog uses a “Chan.” column that indicates design change points. Ignore that at your own cost. If you order a track roller for a machine below the serial number break, you will get the wrong roller assembly. The proper method is to write down your machine’s serial number, then find the page for the corresponding assembly (e.g., track roller section uses reference T3A020, page 1-2). Verify the part number and channel before clicking “add to cart”. This is not a generic aftermarket catalog – it is a scan of the factory Takeuchi document, identical to what a dealer parts counter uses. Takeuchi TL120 Workshop Manual gives you the procedures; this catalog gives you the parts.

Why OEM Documentation Matters Here

Aftermarket parts catalogs often compress multiple years into one drawing and omit the service remarks that tell you which parts supersede. I have seen a web-based parts site list the wrong hydraulic pump for a TL120 because the site conflates two series. The OEM catalog does not do that. Each page is a direct copy of the Takeuchi engineering release. The part numbers are verified, and the quantity column tells you the number required per machine. For example, the track roller section shows Q’ty of 2 for the roller sub-assy – that is per machine, not per side. You will not accidentally order four when you need two. The official source also includes the scale of the drawing (e.g., S=1/5, 1/20) so you can confirm the visual proportions. The Automotive Industry Overview context is about industrial equipment standardization; this manual follows that standard.

Cover & Cab and Decal & Tool – Sections 5, 7

Section 7 covers decals – safety, operation, and brand marks. If you have a missing decal that a safety inspector calls out, the part number in this catalog lets you order the correct adhesive and reflectivity. Section 8 covers hydraulic device – the pump, motor, and control valve. The hydraulic piping section is separate, so do not confuse them. The hydraulic device section includes the pilot relief valve and main relief valve parts. The engine section (4TNV84T-XTBL) is repeated in section 10, but the engine & electrical system in section 3 covers the starter, alternator, and wiring harness. Wiring harnesses are sold as assemblies – you cannot order individual wires. The part number for the harness includes the fuse block and connector bodies. Takeuchi TL120 Workshop Manual – Section: Moteur is useful when you need to remove the engine to replace the harness.

What’s Inside the Index?

The index on page 0-1 lists 10 main sections: 1 Undercarriage, 2 Main Frame & Control Lever, 3 Engine & Electrical System, 4 Hydraulic Piping & Tank, 5 Cover & Cab, 6 Attachment, 7 Decal & Tool, 8 Hydraulic Device, 10 Engine (4TNV84T-XTBL). Each section is then broken into subsections with reference codes like T3A020 for track roller. The book number is BT3Z001-2 for machines from serial 21200008-. That book number matters if you cross-reference with other Tak documentation. The serial number is printed on the header of most pages so you can verify you are in the right edition. This catalog is the foundation for any parts order – without it, you are gambling on fit.

FAQ

Does this parts catalog include torque specifications or repair procedures?

No. This is strictly a parts catalog – part numbers, quantities, and exploded diagrams. For torque specs and repair steps, you need the Takeuchi TL120 Workshop Manual. The two manuals complement each other.

How do I use the index to find a part when I only have a description?

Go to the index on page 0-1 and pick the section most likely to contain that part – e.g., if you need a track roller, go to Section 1 Undercarriage. Within that section, the parts are grouped by assembly (track roller, carrier roller, sprocket, idler). Each assembly has a reference code (e.g., T3A020) that matches the diagram page. On that page, the part numbers are listed in the order of the callout numbers in the drawing. The quantity column tells how many per machine. If a part has a service remark, read it – it might say “use with serial number above 21200008-” or “supersedes part number X.” Write down the part number exactly, including dashes. Do not abbreviate. Then order that number from a Tak dealer or online parts house. This catalog is identical to what the dealer uses, so you will not get told “that number is not valid.”

Getting the correct part the first time means less downtime and fewer return trips to the parts store. For the TL120, the machine’s hydraulic system runs at high pressure – the wrong O-ring can blow out. The undercarriage bolts take heavy shock loads – aftermarket hardware often has different grade markings. Use the factory-verified numbers from this catalog. Download the Factory Manual now and keep it on your tablet or print the page for the assembly you are working on. You will cross-reference the serial number, check the service remarks, and order exactly what is needed.