2004 Takeuchi TB125 TB135 TB145 Compact Excavator Operator's Manual (P/N AG4E028)

This Takeuchi operator's manual, Book No. AG4E028, covers 2004 TB125 (S/N 12514526~), TB135 (S/N 13514051~), and TB145 (S/N 14513261~) compact excavators, including cab and canopy configurations.

• Controls and operation: Walk-around checks, safety lock lever operation, ISO/JCB lever patterns, instrument-panel layouts, excavating, ditch digging, leveling, and transport procedures.

• Routine maintenance: Engine oil and filter changes, water separator cleaning, cooling-system service, fan belt inspection, and maintenance and lubricant charts.

• Hydraulics: Return-filter replacement, suction-strainer cleaning, hydraulic-oil changes and bleeding, accumulator operation, and auxiliary-circuit connection and pressure-release procedures.

• Undercarriage and bucket: Travel motor gear oil replacement, crawler tension adjustment, rubber crawler replacement, slew bearing lubrication, and bucket teeth and side cutter replacement.

• Troubleshooting: Warning-lamp and symptom tables, overheating and dead-battery checks, fuel-system air bleeding, fuse layouts, and protected-circuit references.

• Dimensions and attachments: Machine dimension drawings, operating range views, rated lift capacity charts, attachment combinations, standard, long, and telescopic arms, and the TB145 middle arm.

• Factory options: Load safety device, immobilizer key registration, TB145 automatic crawler adjuster and additional auxiliary hydraulics, plus TB135/TB145 air-conditioning maintenance.

This manual suits trained, qualified operators and maintenance personnel who need the prescribed operating checks and routine service procedures.

Controls, Safety, and Transport

The operating section explains throttle and travel lever use, turning maneuvers, auxiliary hydraulic activation, and break-in requirements for new machines. Safety decal location drawings accompany the cab and canopy control layouts.

Follow the manual's slope-operation, power-line clearance, hydraulic-pressure, and machine-support precautions before operation or maintenance. The safety lock lever does not lock the dozer blade or boom-swing controls.

Transport guidance covers ramp angles, loading posture, and tie-down procedures.

Scheduled Maintenance and Service Limits

The fuel and lubricant chart separates engine-oil, hydraulic tank/system, cooling-system, and travel-reduction-gear capacities. Torque tables cover M6–M20 coarse-thread and M8–M20 fine-thread fasteners in ISO strength category 10.9.

Maintenance charts distinguish initial service from recurring intervals. Hydraulic-oil replacement includes circuit bleeding; the manual warns that omitted bleeding can damage hydraulic components. Bucket-tooth service also addresses wear that can damage the adapter or bucket.

Engine valve-clearance adjustment, cylinder-head bolt retightening, and fuel-injection checks are scheduled dealer work. Those entries refer the reader to Takeuchi service outlets without providing the detailed adjustment or test procedures.

Warning Lamps and Fault Checks

Warning-lamp tables connect oil-pressure, coolant-temperature, battery-charge, and air-cleaner warnings to the relevant checks and dealer referral points. This helps separate routine inspection from faults requiring repair support.

The port-relief-valve boom-lowering procedure is assigned to experienced Takeuchi service personnel and distinguishes TB145 serial-number revisions. Electrical references include fuse and fusible-link location views and protected-circuit tables.

Arm Configurations and Hydraulic Options

Lift charts distinguish arm configurations by load radius, height, and lifting direction; middle-arm data applies to the TB145. Ground-pressure specifications separate cab/canopy and rubber/steel crawler configurations.

The attachment combination table identifies bucket/arm compatibility. Hydraulic breakers and compactors are not permitted on the telescopic arm. Breaker use has its own hydraulic-oil and filter schedule, with detailed breaker handling referred to a separate manual.

TB145 options include proportional second auxiliary hydraulics, third auxiliary controls for a quick attachment, and the automatic crawler adjuster. The load safety device section explains emergency shut-off valves and overload warnings.

Accumulator coverage distinguishes the TB125/TB135 boom-lowering function. Immobilizer key re-registration requires the registration key; losing that key requires replacement of the immobilizer system.

Examples of Serial-Specific Fluid Capacities

These entries are a small sample of the fluid-capacity data in the manual.

The TB145 cooling-system chart lists 6.7 L (7.1 US qt), increasing to 9.6 L (10.1 US qt) from S/N 14515346~.

The TB145 travel reduction gear entry is 0.8 L (0.85 US qt), changing to 1.0 L (1.06 US qt) from the same serial-number break.

Searchable PDF with Chapter Bookmarks

Text search and section navigation: Searchable PDF text and embedded bookmarks provide access to the operating, maintenance, troubleshooting, specifications, and options sections. Dense lift-chart labels benefit from zooming.

Delivered as one 267-page printable PDF in English. The total includes the cover and opening safety page, 263 numbered pages (including five blank pages and four memo pages), and two closing pages with publication details and a safety warning.