Takeuchi TB260 Mini Excavator Workshop Manual (CQ1E030) (SN 126100003-)
On a TB260 that spends its days trenching, loading trucks, or working around foundations, this workshop manual is what I’d pull out when the job stops paying and the machine stops digging. It walks you through how to strip, inspect, and correctly reinstall major components so you’re not guessing. If, for example, your boom feels sloppy or you’ve just replaced a final drive, this manual gives you a clear sequence to remove, measure, re-bush, and refit everything so it’s tight and safe when it goes back to work.
Applications & Use Cases
- Planning a major repair on the upper structure, boom, or undercarriage so parts come off and go back on in a controlled order.
- Tracing a hard-to-find fault by following logical checks instead of just swapping parts.
- Inspecting wear points during scheduled downtime to decide what must be replaced now versus what can run longer.
- Verifying reassembly after hydraulic, travel motor, or swing-related work so nothing is misaligned or left loose.
- Supporting parts identification by matching what you see on the machine to the correct components before ordering.
FAQ
Q: Can I keep this manual on a tablet in the field?
A: Yes, it’s practical to use digitally; you can zoom diagrams and search text while you’re standing at the machine.
Q: Is it worth printing sections of this manual?
A: Printing the procedures you’re doing that day is handy—you can mark notes, keep it next to the machine, and not worry about grease on your device.
Safety Note
Always follow the manual’s support, lockout, and pressure-relief steps before loosening or removing any component.
Takeuchi TB260 Mini Excavator Index:
- REVISION HISTORY
- FOREWORD
- Directional terms: front, rear, left, right
- Machine serial number
- Symbols used in this manual
- Manual structure
- 1. SAFETY
- SAFETY ALERT SYMBOL
- SAFETY PRECAUTIONS
- Observe all safety rules
- Wear safe clothing and protective gear
- Install an extinguisher and a first aid kit
- Lockout/Tagout (LOTO)
- Use the correct tools
- Regularly replace the safety-critical parts
- Explosionproof lighting
- Prohibit access by unauthorized persons
- Prepare the work area
- When the canopy is tilted up
- Keep the machine clean
- Stop the engine before performing maintenance
- Keep clear of the moving fan and belt
- When working under the machine
- When working on the machine
- Securing the working equipment
- Secure the engine hood and guard when they are open
- Place heavy components in a stable position
- Caution when filling with fuel or oil
- Handling of hoses
- Be careful with hot and pressurized components
- Handling of radiator
- Be careful with oils under pressure
- Release the residual pressure from the hydraulic system before performing maintenance
- Be careful with grease under pressure
- Handling of the accumulator
- Disconnect the battery
- Use caution when handling batteries
- Have a service agent repair welding cracks or other damage
- Checks after maintenance
- Disposing of wastes
- CAUTIONS WHEN WORKING
- Before starting work
- When disassembling or assembling
- When removing/installing the hydraulic unit
- When connecting/disconnecting the hoses or pipes
- Handling of seals
- Pressure adjustment for hydraulic devices
- 2. SERVICE DATA
- DIMENSIONAL DRAWING
- Machine dimensions
- Operating ranges
- Angle blade
- SPECIFICATION TABLES
- Performance
- Dimensions of completed machine
- Dimensions of base machine
- Engine
- Hydraulic system
- Operating device
- Slew equipment
- Lower machinery
- Working equipment
- Working dimensions (Middle arm)
- Main structure
- Hydraulic cylinder
- Digging force
- Dozer blade
- TABLE OF MASSES
- Upper structure
- Lower structure
- Hoe attachments
- LUBRICANT AND FUEL CHART
- PERFORMANCE CRITERIA
- Standard values table
- Hydraulic pump assignment table
- Pump P1
- Pump P2
- Pump P3
- Pump P4
- Methods for inspecting performance
- Hydraulic oil pressure (Boom, arm, dozer blade)
- Hydraulic oil pressure (Slew)
- Hydraulic oil pressure (Pilot pressure)
- Travel speed (5 revs.)
- Travel speed (10 m)
- Straight-ahead traveling
- Natural travel drop
- Slew time
- Overrun when slewing stops
- Natural slew drop
- Boom cylinder speed
- Arm cylinder speed
- Bucket cylinder speed
- Dozer blade cylinder speed
- Swing cylinder speed
- Natural cylinder drop
- Swing
- Lever play
- Backlash
- Slew bearing play
- Track tension
- TIGHTENING TORQUE
- Hydraulic hose
- Bite-type pipe fitting for steel pipe
- Joint for piping
- Joint for piping (O-ring seal type)
- Bolts and nuts (JIS strength category 10.9)
- HYDRAULIC CIRCUIT DIAGRAM
- Serial No.: 126100003 to 126101991
- Serial No.: 126101992 to 126102807
- Serial No.: 126102808 to 126103629
- Serial No.: 126103630 or later
- 3rd service hard lock specification
- Serial No.: 126100003 to 126103629
- Serial No.: 126103630 or later
- ELECTRICAL CIRCUIT DIAGRAM
- Symbols in electrical circuit diagram
- Wire color symbols
- Wire color table
- Wire types
- Schematic diagram
- Cab
- Serial No.: 126100003 to 126100539
- Serial No.: 126100540 to 126102031
- Serial No.: 126102032 to 126102535
- Serial No.: 126102536 to 126103148
- Serial No.: 126103149 to 126103629
- Serial No.: 126103630 to 126103815
- Serial No.: 126103816 to 126104524
- Serial No.: 126104525 to 126104837 (excluding 126104748, 126104749, 126104759, 126104766 to 126104772, 126104781 to 126104783, and 126104794 to 126104832)
- Serial No.: 126104838 to 126105727 (including 126104748, 126104749, 126104759, 126104766 to 126104772, 126104781 to 126104783, and 126104794 to 126104832)
- Serial No.: 126105728 to 126106521
- Serial No.: 126106522 to 126110267
- Serial No.: 126110268 to 126110665
- Serial No.: 126110666 or later
- Cab For USA
- Serial No.: 126100003 to 126100031
- Serial No.: 126100032 to 126100539
- Serial No.: 126100540 to 126101461
- Serial No.: 126101462 to 126102031
- Serial No.: 126102032 to 126103227
- Serial No.: 126103228 to 126103629
- Serial No.: 126103630 to 126103815
- Serial No.: 126103816 to 126104524
- Serial No.: 126104525 to 126104837 (excluding 126104748, 126104749, 126104759, 126104766 to 126104772, 126104781 to 126104783, and 126104794 to 126104832)
- Serial No.: 126104838 to 126105727 (including 126104748, 126104749, 126104759, 126104766 to 126104772, 126104781 to 126104783, and 126104794 to 126104832)
- Serial No.: 126105728 to 126106521
- Serial No.: 126106522 or later
- Canopy
- Serial No.: 126100003 to 126100539
- Serial No.: 126100540 to 126103227
- Serial No.: 126103228 to 126103629
- Serial No.: 126103630 to 126103815
- Serial No.: 126103816 to 126103848
- Serial No.: 126103849 to 126104524
- Serial No.: 126104525 to 126104837 (excluding 126104748, 126104749, 126104759, 126104766 to 126104772, 126104781 to 126104783, and 126104794 to 126104832)
- Serial No.: 126104838 to 126105727 (including 126104748, 126104749, 126104759, 126104766 to 126104772, 126104781 to 126104783, and 126104794 to 126104832)
- Serial No.: 126105728 to 126106521
- Serial No.: 126106522 or later
- WIRE HARNESS
- Electrical wiring assembly
- Main unit harness
- Main harness
- Wire harness
- Wire harness
- Wire harness
- Electrical wiring assembly
- Main harness
- Wire harness
- HYDRAULIC DEVICE LAYOUT DIAGRAM
- 3. FUNCTION
- PISTON PUMP
- Operation
- Relief valve and solenoid valve
- Solenoid valve
- When the solenoid valve is not energized
- When the solenoid valve is energized
- GEAR PUMP
- CONTROL VALVE
- When the spools are in the neutral position:
- When the spool is operated:
- Load check valve
- Main relief valve
- The relief valve remains turned off:
- The relief valve is actuated:
- Port relief valve
- Relieving operation:
- Suction operation:
- Anti-cavitation valve
- Switch valve
- When the switch valve is activated
- When the switch valve is not activated
- PILOT VALVE (CONTROL LEVER)
- PILOT VALVE (SWING)
- PILOT VALVE (BLADE)
- PILOT VALVE (TRAVEL)
- PROPORTIONAL SOLENOID VALVE (1ST SERVICE / 2ND SERVICE)
- PROPORTIONAL SOLENOID VALVE (POWER CONTROL)
- EMERGENCY SHUT-OFF VALVE
- Spool at the neutral position
- When oil flows from port A to port B
- When oil flows from port B to port A
- When an abnormal high pressure is produced in the cylinder
- SOLENOID VALVE
- SOLENOID VALVE (3RD SERVICE HARD LOCK)
- SELECTOR VALVE
- CYLINDERS
- TRAVEL MOTOR
- Hydraulic motor
- Counter balance valve
- 2-speed mechanism
- 2nd speed control valve
- Swash plate
- Automatic 2-speed switching system
- Parking brake
- Reduction gears
- SLEW MOTOR
- Hydraulic motor
- Relief valve
- The 1st stage
- The 2nd stage
- Make-up valve
- Anti-rebound valve
- When the brake is actuated
- When the Motor Rebounds
- Parking brake
- Timer valve
- Reduction gears
- SWIVEL JOINT
- 4. DISASSEMBLY AND ASSEMBLY
- SERVICE STANDARDS
- Carrier roller
- Track roller
- Sprocket
- Idler
- Outer diameter of the pin
- Replacing the pin and bushing
- DRIVE SYSTEM
- Engine
- Removing the engine
- Installing the engine
- Hydraulic pump
- Removing the hydraulic pump
- Installing the hydraulic pump
- Fuel tank
- Removing the fuel tank
- Installing the fuel tank
- Battery
- Removing the battery
- Installing the battery
- TRAVEL SYSTEM
- Removing the crawler
- Installing the crawler
- Removing a steel crawler or segmented rubber crawler
- Installing a steel crawler or segmented rubber crawler
- Installing/removing the rubber pad for a segmented rubber crawler
- Replacing the crawler
- Removing the carrier roller
- Installing the carrier roller
- Removing the track roller
- Installing the track roller
- Removing the idler and track adjuster
- Installing the idler and track adjuster
- Removing the travel motor
- Installing the travel motor
- SLEW EQUIPMENT
- Slew motor
- Construction
- Removing the slew motor
- Installing the slew motor
- Slew bearing
- Construction
- Removing the slew bearing
- Installing the slew bearing
- Swivel joint
- Construction
- Equipped with angle blade
- Removing the swivel joint
- Installing the swivel joint
- UPPER FRAME
- Upper frame
- Construction
- Removing the upper frame
- Installing the upper frame
- Covers
- Construction
- Removing the covers
- Installing the covers
- Cab
- Construction
- Removing the cab
- Installing the cab
- Replacing glass window panes
- Installing glass window panes
- OPERATING DEVICE
- Construction diagram
- Control levers
- Dozer blade lever
- Lever stand
- Pilot valve (Left)
- Pilot valve (Right)
- Control box (Left)
- Control box (Right)
- Hydraulic piping
- Disassembly and assembly
- Removal and installation of the accumulator
- WORK EQUIPMENT
- Construction diagram
- Hoe attachment
- Angle blade
- Disassembly and assembly
- Removal and installation of the bucket
- Removal and installation of the link
- Release of residual pressure
- Removal and installation of the arm
- Removal and installation of the boom
- Removal and installation of the boom bracket
- Removal and installation of the blade
- Removal and installation of the angle blade
- HYDRAULIC TANK
- Removing the hydraulic tank
- Installing the hydraulic tank
- HYDRAULIC PUMP
- Construction
- Special tools
- Inspection and adjustments
- CONTROL VALVE
- Construction
- Standard
- Equipped with angle blade
- Bucket section
- Boom section
- Left travel section
- Inlet housing
- Right travel section
- Swing section
- 1st auxiliary line
- Arm section
- Slew section
- Blade section
- 2nd auxiliary line piping section
- Angle blade section
- Switch valve
- Disassembly and Assembly
- Inspection and adjustment
- Checking the parts
- Adjusting Pressure of Main Relief Valve
- PILOT VALVE (CONTROL LEVER)
- Construction
- Special tools
- Installation jig A
- Installation jig B
- Disassembly and Assembly
- Inspection and adjustment
- PILOT VALVE (SWING, BLADE)
- Construction
- Special Jigs
- Disassembly and Assembly
- Inspection and adjustment
- PILOT VALVE (TRAVEL)
- Construction
- Disassembly and Assembly
- Special Jigs
- Disassembly
- Assembly
- Inspection and adjustment
- PROPORTIONAL SOLENOID VALVE (POWER CONTROL)
- Construction
- Disassembly and Assembly
- Inspection and adjustments
- PROPORTIONAL SOLENOID VALVE (1ST/2ND SERVICE)
- Construction
- Disassembly and Assembly
- Inspection and adjustment
- EMERGENCY SHUTOFF VALVE
- SOLENOID VALVE (BLADE FLOAT)
- Construction
- Disassembly and Assembly
- Inspection and adjustment
- SOLENOID VALVE (ANGLE BLADE)
- Construction
- Disassembly and Assembly
- Inspection and adjustment
- SOLENOID VALVE (3RD SERVICE HARD LOCK)
- Construction diagram
- Disassembly and assembly
- Disassembly of solenoid valve
- Assembly of solenoid valve
- SELECTOR VALVE
- Construction
- Disassembly and Assembly
- Inspection and adjustment
- CYLINDERS
- Construction
- Boom cylinder
- Arm cylinder
- Bucket cylinder
- Dozer blade cylinder
- Swing cylinder
- Disassembly and Assembly
- Special tools
- Disassembly
- Assembly
- Inspection and adjustment
- Inspection after disassembly
- Inspection after assembly
- ANGLE CYLINDER
- Construction
- Disassembly and Assembly
- Special tools
- Disassembly
- Assembly
- Inspection and adjustment
- Inspection after disassembly
- Inspection after assembly
- TRAVEL MOTOR
- Construction diagram
- Hydraulic motor
- Reduction gears
- Counterbalance valve, 2nd-speed control valve, relief block assembly
- Disassembly and assembly
- Inspection and adjustment
- SLEW MOTOR
- Construction
- Special tools
- Oil seal press-fitting jig A
- Collar inserting jig B
- Disassembly and assembly
- Inspection and adjustments
- SWIVEL JOINT
- Construction
- Disassembly and Assembly
- Inspection and adjustment
- Inspection procedures and remedial actions
- Use limit for parts
- Inspection after assembly
- SWIVEL JOINT (EQUIPPED WITH ANGLE BLADE)
- Construction
- Disassembly and Assembly
- Removal jig
- Disassembly
- Assembly
- Inspection and adjustment
- Inspection procedures and remedial actions
- Use limit for parts
- Inspection after assembly
- 5. TROUBLESHOOTING
- ABOUT THE TROUBLESHOOTING SECTION
- Notes on troubleshooting and servicing
- OVERALL MACHINE
- No operation is possible.
- All systems working, but insufficient power.
- Boom, bucket, slew and arm fail to move or are too slow.
- TRAVELING
- No right or left travel
- Right or left travel speed decelerates and the machine veers to one side.
- 2nd-speed travel is not possible.
- SLEWING
- No slew movement.
- No right or left slew movement.
- Slewing is slow or lacks force.
- Slewing occurs but overrun is large when slewing stops or slewing does not stop.
- When stopped on a slope, the upper-structure cannot maintain its posture.
- BOOM
- Boom cylinder does not move.
- Boom cylinder is slow or lacks force.
- When the control lever is pulled slowly, the boom drops temporarily.
- Spontaneous drop of the boom cylinder is too large.
- ARM
- Arm cylinder does not move.
- Arm cylinder is slow or lacks force.
- Spontaneous drop of the arm is too large.
- BUCKET
- Bucket cylinder does not move or lacks force.
- Spontaneous drop of the bucket is too large.
- BOOM SWING
- Swing cylinder does not move.
- BLADE
- Blade cylinder does not move or lacks force.
- The spontaneous drop of the blade is too large, or the blade cannot support the machine.
- AUXILIARY HYDRAULICS
- Prescribed pressure is not supplied to the 1st and 2nd auxiliary lines.
- ANGLE BLADE
- Angle cylinder does not move.
- Angle cylinder lacks force.
- HYDRAULIC PUMP
- GEAR PUMP
- CONTROL VALVE
- PILOT VALVE
- SOLENOID VALVE
- CYLINDERS
- TRAVEL MOTOR
- Hydraulic motor
- 2nd-speed control
- Parking brake
- SLEW MOTOR
- Hydraulic motor, brake valve
- Parking brake
- 6. OTHER
- MAINTENANCE SOFTWARE MANUAL
- CONTENTS
- 1. OUTLINE
- 2. CONNECTION METHODS
- 2-1. Items needed
- 2-2. Installation method
- 2-2-1. Installation of the PLUS+1 Service Tool
- 2-2-2. Installation of the maintenance tool driver
- 2-3. Connection to the machine and startup of the maintenance software
- 3. DESCRIPTION OF FUNCTIONS
- 3-1. Home (Main screen)
- 3-2. Maintenance menu
- 3-2-1. Monitor
- 3-2-2. Inputs
- 3-2-3. Outputs
- 3-2-4. Feedback
- 3-2-5. Error Code
- 3-3. Setting menu
- 3-3-1. Vehicle Status
- 3-3-2. Engine
- 3-3-3. AUX1
- 3-3-4. AUX2/4
- 3-3-5. Misc
- 3-3-6. Liftalarm
- 3-3-7. Immobillzer
- 3-3-8. Pattern change
- 3-3-9. Option
- 3-3-10. Hourmeter
- 3-3-11. Auto engine stop
- AIR CONDITIONER
- [1] Product Overview
- 1. Outline
- 2. Specifications
- [2] Operating and Handling the Air Conditioner
- 1. Outlets and controls
- 2. Controls
- 3. Operation Guidelines
- 4. Air Conditioner Use and Precautions
- 5. Handling the Air Conditioner
- [3] Construction, Operation and Control
- 1. Construction
- 2. Air Conditioner Operation and Control
- [4] Inspection and Maintenance
- 1. Air Conditioner Inspection and Maintenance Table
- 2. Air Conditioner Daily Inspections and Handling Procedures
- 3. Maintenance
- [5] Refrigerant Charging
- 1. Safety Precautions when Charging Refrigerant
- 2. Evacuation
- 3. Refrigerant charging
- [6] Troubleshooting
- 1. Troubleshooting using a Gauge Manifold
- 2. Troubleshooting Table
- MULTI-INFORMATION DISPLAY
- INFORMATION SCREEN
- Engine Information screen
- Other Information screen
- LEVER SWITCH PATTERN SWITCHING METHOD
- Applicable models
- Included Parts
- Pattern switching method
- Standard pattern
- Case 1: Reversing the 1st auxiliary line piping and 2nd auxiliary line piping
- Case 2: Reversing A and B around or C and D around
- Case 3: Reversing the 1st auxiliary line piping and 2nd auxiliary line piping and reversing either A and B around or C and D around
- HOW TO ENABLE THE AUX4 FUNCTION
- VEHICLE ERROR CODES
Takeuchi
