2008-Present Takeuchi TB138FR Excavator Illustrated Parts Manual (P/N BG5Z002)

This Takeuchi illustrated parts manual covers the 2008–Present TB138FR hydraulic excavator, starting at serial number 13810003. Book No. BG5Z002 carries an index date of April 16, 2008, and includes the 3TNV88-XTBZ engine parts catalog.

• Undercarriage: Illustrated breakdowns of the lower frame, crawler belts, track and carrier rollers, front idlers, track adjusters, slew bearing, and travel device.

• Hydraulic components: Exploded views of the swivel joint, control-valve blocks, hydraulic pump, travel and slew motors, and boom, arm, bucket, offset, and dozer blade cylinders.

• Auxiliary controls: Parts distinctions for proportional controls, second auxiliary lines, pilot valves, ISO-JCB selector valves, accumulators, and emergency shut-off valves.

• Engine components: Internal engine parts, fuel injection equipment, lubrication and cooling systems, starting motor, generator, and gasket sets.

• Boom and attachments: Boom offset linkage, interference sensor, standard and long arms, bucket teeth and side cutters, and dozer blade assemblies.

• Electrical equipment: Harness layouts and parts lists for fuse boxes, relays, instrument clusters, battery mounting, the security system, and travel alarm.

• Cab and canopy: Door and window assemblies, seats, heater and air-conditioning components, canopy lighting, window washers, and regional radio installations.

This catalog is suited to mechanics and parts staff who can match illustrated callouts to parts lists and check serial-number and equipment differences.

Parts Matching and Serial Changes

The tables identify component part numbers, quantities, and applicable serial ranges. These distinctions help match replacement hardware to the installed assembly before ordering parts for a repair.

Travel motors: The travel-device list separates S/N 13810003–13810158 from S/N 13810159 onward and carries a note specifying paired replacement of the left and right motors.

Air cleaner and air conditioning: Air-cleaner assemblies change at S/N 13810075. The air-conditioner unit has separate layouts for S/N 13810003–13810188 and S/N 13810189 onward, identifying changes to its enclosure, insulation, and mounting hardware.

Steel crawlers, rubber crawlers, and steel crawlers with rubber pads have separate listings. Standard and long-arm attachments, U.S.-specific boom components, and hydraulic pumps with or without air conditioning are also distinguished.

Hydraulic Components and Structural Hardware

“Swivel Joint” identifies the seal kit and internal sealing parts. “Travel Motor” separates the reduction, motor, and valve sections, while “Control Valve” breaks the valve bank into function-specific blocks, including the second-auxiliary block.

Turntable drawings locate counterweights and noise-reduction materials. Boom-offset and dozer blade sections identify linkage hardware, cylinders, and associated piping.

Pump-list limitation: The “Hydraulic Pump (2/2)” illustration is present, but its matching parts table is missing. PDF page 311 repeats the lower-frame parts list instead.

Engine Parts and Catalog Symbols

The engine section extends to the cylinder block and head, camshaft and driving gear, crankshaft and piston, fuel injection pump internals, and governor components. External listings cover air-cleaner elements, engine cushion mounts, cooling hardware, and fuel piping.

The catalog-reading guide explains assembly levels, serial applicability, and interchangeability symbols, including one-way substitutions and parts exchanged only as a set. This helps interpret replacement entries when preparing an engine repair parts list.

Electrical Layouts and Equipment Options

“Electrical (1/2)” and “Electrical (2/2)” show harness locations and component mounting, including auxiliary proportional controllers. Travel and operation-lever drawings identify pilot hose connections and control hardware.

Regional radio assemblies are listed for Europe/Asia/Oceania, America, and Japan. Cab and canopy sections distinguish their accessory installations, with separate breakdowns for window washers, lighting, and air-conditioning equipment.

Repair Scope

This is a parts-identification reference. It does not provide written teardown or overhaul procedures, diagnostic flowcharts, electrical circuit schematics, torque tables, or hydraulic test specifications.

Consult the appropriate service procedures and a qualified technician before repair work involving pressurized hydraulics or heavy assemblies. Exploded views do not establish a safe disassembly sequence.

PDF Search, Navigation, and Page Count

Text search works in section headings and English parts tables; some diagram labels, decal text, and the catalog-reading guide are not searchable. Two bookmarks open the machine catalog and engine section. Small labels in the sampled electrical and piping layouts are readable when enlarged.

The printable 353-page PDF contains 311 machine-catalog pages, including the cover, index, and three blank pages, plus 42 engine-catalog pages, including two introductory pages. These pages are all included in the total.