Takeuchi TB15/TB120 Compact Excavator Parts Catalog

This Takeuchi factory parts catalog covers TB15 and TB120 compact excavators from serial number 00543 onward. The cover carries reference B2-A0b-0-D, and the included 3TNA72L-UTB engine listings carry catalog number Y00E2150. It provides component identification and ordering information for repair planning; it does not provide diagnostic procedures or step-by-step repair instructions.

• Undercarriage and travel: Exploded parts drawings for crawler belts, track rollers, front idlers, track spring mechanisms, lower piping, and blade cylinders.
• Hydraulic assemblies: Component breakdowns and section views for boom, arm, bucket, and swing cylinders, travel and slew motors, hydraulic pumps, and swivel joints.
• Valve controls and attachments: Main control, selector, and counterbalance valves, pump drives, sub levers, hoe attachments, and breaker piping.
• Operator station and electrical parts: Travel levers, swing pedals, operation levers, control boxes, wiring harnesses, batteries, lighting, and horn assemblies.
• Cabin and canopy equipment: Cab structure, doors, glass, wiper components, heaters, warning stickers, and service tool listings.
• Engine components: Illustrated parts data for the cylinder block and head, crankshaft, fuel injection equipment, governor, lubrication, cooling, starter, and generator.

The assembly callouts, quantities, and serial-number notes make this catalog suited to technicians and owners who can identify the machine configuration and interpret parts drawings before ordering replacements.

Part Numbers, Serial Breaks, and Assembly Selection

Matching the machine: Parts tables connect each illustration reference with a part number, description, quantity, and applicable serial range. Assembly hierarchy and interchangeability symbols help distinguish complete units from their listed components. Matching these entries before ordering helps avoid selecting a visually similar part for the wrong configuration.

For example, the TB15 seat belt listing for U.S. and Canadian machines separates serial numbers 00543–06361 from 06362 and after. Main control valve listings also distinguish model and serial applicability; a drawing alone does not establish compatibility.

Undercarriage, Operator Controls, and Cab Equipment

Chassis and rotating platform: Track Spring and Travel Motor drawings identify bearings, seals, O-rings, and hardware, while slew-device listings distinguish arrangements with and without parking brakes. The turret, turntable, lower chassis, and blade assemblies are covered alongside their hardware.

The travel-lever listing identifies left-hand-thread rod ends and nuts. Matching the thread direction matters: forcing mismatched hardware can damage the mating threads. Exploded views identify the parts involved, but do not establish a safe disassembly sequence.

Controls and enclosure: Control box entries include hour meters, water temperature gauges, and glow resistors. Separate drawings cover right and left operation levers, swing pedals, door hinges, interior handles, glass, and wiper motor parts.

Electrical sections show harness and component layouts for canopy and cabin configurations, including batteries, lights, and horns. These are parts illustrations, not electrical circuit schematics or fault-finding charts.

Hydraulic Tanks, Valves, and Cylinder Components

Filter and piping identification: The hydraulic tank lists 15510-45180 as the complete filter assembly and 15510-35180 as its cartridge. This distinction helps identify whether an order concerns the complete unit or the replacement cartridge.

Hydraulic piping drawings connect the parts listings for tanks, pumps, main control valves, selector valves, and attachment lines. Swivel Joint drawings and counterbalance-valve sections identify internal components; cylinder lists include rods, seals, wear rings, and seal sets.

Fuel tank, pump-drive, radiator mounting, engine-foot, and associated piping assemblies have separate entries. Breaker coverage includes the machine's attachment piping. Relieve hydraulic pressure before opening hydraulic circuits, and properly support heavy structures before working beneath them.

Engine Parts and the Appended Collection

3TNA72L-UTB components: Engine listings cover pistons, connecting rods, camshaft and timing gears, injection pump and nozzle components, governor linkage, oil pump and filter, water pump, thermostat, starter, generator, and gasket sets.

The appended collection repeats selected engine parts tables and only part of the index. It also includes two cylinder-block sheets labeled 3TN66E-S and 3TNA72E-S; these do not constitute complete parts catalogs for those engines.

Selected Arm Lengths and Bucket Shim Sizes

These examples are a small selection of the component dimensions recorded in the parts lists.

For TB15/TB120 canopy configurations, the Hoe listing distinguishes a 750 mm arm assembly from the 1060 mm long-arm assembly. The TB15/TB120 Bucket listing includes shims in 0.8 mm, 1.0 mm, and 1.2 mm thicknesses. These identify listed components, rather than prescribing an assembled clearance or adjustment setting.

Bookmarks, Diagram Detail, and Included Pages

Search and page navigation: PDF text search is unavailable. Two bookmarks open the main catalog and appended engine collection, without chapter-level navigation. Small drawing callouts require zooming; the engine index in the main catalog is sideways and benefits from rotating the view.

One printable, 310-page PDF contains the 260-page TB15/120 catalog, including its engine section, followed by a 50-page engine parts collection. Covers, introductory pages, indexes, the publication page, repeated material, and the two additional cylinder-block sheets are already included in those totals.