1995–2001 Takeuchi TB070 Compact Excavator Workshop Manual OEM (P/N WL1-101E4)

This February 2000 Takeuchi workshop manual, identified on the cover as WL1-101E4, covers the 1995–2001 TB070 Compact Excavator, serial numbers 1703004 and up. It documents the Nissan BD3004-powered cab model with steel or rubber crawlers and includes lift-capacity charts for the long-arm configuration.

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• Engine repair: Engine removal and installation, cylinder-head and cylinder-block overhaul, compression testing, fuel-injection timing, and cooling and lubrication system service.

• Hydraulic repair: Variable-piston pump disassembly, control-valve inspection, pilot-valve service, cylinder resealing, air bleeding, and main relief valve pressure adjustment.

• Travel and slew systems: Travel-motor removal, parking-brake service, slew-motor disassembly, swivel-joint repair, and maintenance procedures for track adjusters, slew bearings, and track rollers.

• Attachments and controls: Boom, arm, bucket, swing-bracket, and dozer-blade service, plus mechanical linkage adjustments for travel, auxiliary, and swing levers.

• Electrical diagnosis: Wiring diagrams and circuit explanations for the throttle controller, automatic preheating, warning instruments, lever lock, and travel-speed controls.

• Troubleshooting and tests: Fault-isolation charts for weak operation, travel deviation, slew overrun, and attachment drift, supported by hydraulic pressure tests and maintenance standards.

Written for personnel engaged in machine maintenance, this manual addresses workshop repair work involving hydraulic test equipment, lifting equipment, and engine measuring tools.

Hydraulic Pumps, Valves, and Serial Changes

The device-specification tables distinguish hydraulic pump configurations at serial 1703304. Hydraulic Circuit Diagrams separate machines through 1703504 from those starting at 1703505; the earlier pilot-piping drawings also identify A-Type (ISO) and G-Type (JCB) control arrangements.

Cross-sectional views explain the mono-block and three-section control valves. Hydraulic pilot-unit piping drawings show the connections, while service sections cover pump-coupling installation, valve inspection, and pressure adjustment. The pump control unit and port relief valves have explicit instructions against internal disassembly.

The pump installation section warns that trapped air after pump or hose work can damage the pump. Cylinder leakage tests help distinguish attachment drift caused by internal cylinder leakage from leakage through the control valve before repair work is selected.

Undercarriage, Attachments, and Performance Checks

Travel-motor service details flange and parking-brake work; it does not provide a complete travel reduction-gear overhaul. Slew-motor material covers the motor, parking brake, and reduction mechanism, while swivel-joint procedures include seal inspection and leakage testing.

Wear assessment: Separate pin-and-bushing wear limits and axial-clearance tables help distinguish worn joints from end play that can be adjusted with shims. Track-roller and idler inspection standards address undercarriage wear separately.

Rated Lift Capacity charts distinguish crawler and arm configurations, including the steel-crawler long-arm arrangement. Specification Diagrams and travel-curve test drawings support dimensional and performance checks. Torque tables, fluid capacities, lubrication requirements, and cylinder-drift limits provide the related service references.

Electrical Circuits and Throttle Controls

Electrical Wiring Diagrams distinguish serials 1703004–1703324 from 1703325 and up. The Electrical System Diagram and individual circuit explanations cover the QHS preheating system, throttle stepping motor, engine-stop logic, and warning functions.

Throttle-control procedures include operating-position, stop-position, and maximum-speed adjustment.

Nissan BD30 Internal Engine Repair

Machine-specific procedures cover engine mounting, engine removal, and radiator removal. The included March 1992 Nissan BD-series service manual covers BD30-000001 and up, with base-engine specifications separate from the TB070 installation data.

Overhaul depth: Cylinder-head work includes valve guides, valve seats, and head-gasket selection. Cylinder-block procedures cover liners, piston grades, crankshaft inspection, bearing-clearance measurement with Plastigage, and timing-gear checks. The assembly notes warn that contact from the connecting rod can deform the piston-cooling oil jet.

Compression testing identifies gauge ED1960 0000 and adapter ED1960 0800. Water-pump, thermostat, oil-pump, and oil-cooler procedures extend the coverage beyond engine removal.

Fuel injection: PES4A injection-pump and EP/RSV governor calibration data accompany injection-timing and nozzle-test information. Nissan assigns disassembly, inspection, and adjustment of the injection pump, governor, nozzle holder, and timer to a designated Nissan Diesel service facility.

All service data shown here is for reference only; qualified technicians and the original OEM documentation remain the authoritative source for hands-on work.

TB070 and BD30 Manuals in One PDF

The English-language download is a printable 456-page PDF: 364 pages of Takeuchi material, including a repeated 50-page hydraulic section, followed by 92 pages of Nissan engine material. Covers, section dividers, and blank pages are already included in these totals; the repeated pages do not add new technical content.