Takeuchi TL12V2 Track Loader Pdf Workshop Manual (CR0E028)

Running a TL12V2, you’re usually in mud, demolition rubble, or tight grading work where downtime hurts fast. This workshop manual is what I pull out when a job turns from “quick check” into real teardown and reassembly. It walks you through step‑by‑step repair sequences, so you can strip, inspect, and reinstall major components without guessing. For example, if the loader starts creeping or won’t hold grade, this is what I’d use to trace the issue through the drive system, verify adjustments, and button everything back up safely.

Applications & Use Cases

• Plan a full repair on the undercarriage or loader arms, with an ordered sequence so you don’t miss hidden fasteners or shims.
• Trace hydraulic faults from the control end to the actuators, isolating leaks or sticking components before you start swapping parts.
• Inspect and verify wear limits on key components during scheduled downtime, so you catch problems before they become failures.
• Align and reinstall major assemblies after replacement, checking routing of hoses, harnesses, and guards before putting the machine back to work.
• Test and confirm operation after repairs, using the manual’s procedures to make sure everything is responding correctly under load.

FAQ

Q: Can I use this manual on a tablet in the field?

A: Yes, it’s practical to keep it on a tablet or laptop so you can zoom diagrams and search terms right next to the machine.

Q: Is it worth printing sections of this manual?

A: Many techs print just the procedures they’re doing that day, then mark torque steps or inspection notes directly on the pages.

Safety Note

Always follow the manual’s lockout, blocking, and pressure‑relief steps before loosening or removing any component.

Takeuchi TL12V2 Track Loader 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 for handling DEF/AdBlue®
  • 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 range
  • SPECIFICATION TABLES
    • Performance
    • Dimensions
    • Mass
    • Engine
    • Hydraulic system
    • Brake device
    • Undercarriage
    • Operating device
    • Working equipment
    • Hydraulic system
  • TABLE OF MASSES
    • Upper structure
    • Lower structure
    • Attachments
  • LUBRICANT AND FUEL CHART
    • Diesel fuel standards
    • Handling DEF/AdBlue®
  • PERFORMANCE CRITERIA
    • Standard values table
      • Serial No.: 412000006 to 412000932
      • Serial No.: 412000933 or later
    • Hydraulic pump assignment table
      • Machine without high-flow equipment
      • Machine with high-flow equipment
    • Methods for inspecting performance
      • 1. Engine speed
      • 2. Hydraulic oil pressure
      • 3. Cylinder speed
      • 4. Travel speed
      • 5. Crawler shoe 5 rotations
      • 6. Straight-ahead traveling
      • 7. Hydraulic cylinder natural drop
      • 8. Natural travel drop
      • 9. Crawler tension
      • 10. Bucket front edge
  • 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
    • Standard flow specification
      • Serial No.: 412000006 to 412000925
      • Serial No.: 412000926 or later / 412200001 or later
    • High flow and pattern change specification
      • Serial No.: 412000006 to 412000925
      • Serial No.: 412000926 or later / 412200001 or later
    • High flow specification
  • ELECTRICAL CIRCUIT DIAGRAM
    • Symbols in electrical circuit diagram
      • Wire color symbols
      • Wire color table
      • Wire types
    • Schematic diagram
      • Serial No.: 412000006 to 412000638
      • Serial No.: 412000639 to 412000770
      • Serial No.: 412000771 to 412001424
      • Serial No.: 412001425 to 412001946
      • Serial No.: 412001947 to 412002300
      • Serial No.: 412002301 to 412003934 (excluding 412003760 and 412003849)
        • Serial No.: 412003760 and 412003849
      • Serial No.: 412003935 or later
      • Serial No.: 412200001 to 412200059
      • Serial No.: 412200060 or later
  • WIRE HARNESS
    • Wiring diagrams
      • Electrical wiring assembly: 06942-00217-01
      • Wire harness: 06942-00186-01
      • Wire harness: 06942-00199-01
      • Wire harness: 06942-00201-01
      • Wire harness: 06942-00218-00
      • Wire harness: 06942-00069-02
      • Wire harness: 06942-00208-00
      • Wire harness: 06942-00173-01
      • Wire harness: 06942-00202-00
      • Wire harness: 06942-00067-02
      • Wire harness: 06942-00179-00
      • Wire harness: 06942-00071-02
      • Attachment wiring assembly: 06942-00018-01
      • Wire harness: 06942-00185-01
      • GPS device assembly: 06942-00159-00
      • Wire harness: 06942-00172-00
  • HYDRAULIC DEVICE LAYOUT DIAGRAM
• 3. FUNCTION
  • HST PUMP
    • Hydraulic pump
    • Control section
    • Charge check/high-pressure relief valve assembly
      • Charge check valve
      • High-pressure relief valve
    • Charge relief valve
  • GEAR PUMP
  • CONTROL VALVE
    • At the neutral position
    • AUX1 operation
    • Arm-raising operation
    • Arm-lowering operation
    • Bucket roll-back operation
    • Bucket dump operation
    • Flow rate adjustment valve
    • When arm float is turned off
    • Arm float operation
    • Main relief valve
    • Overload relief valve
  • SUB VALVE
    • When the solenoid valve A is not energized:
    • When the solenoid valve A is energized:
    • When the solenoid valve B is not energized:
    • When the solenoid valve B is energized:
  • PILOT VALVE
    • When the lever (1) is in the neutral position:
    • When the lever (1) is tilted:
    • When the lever (1) is kept at a certain position:
  • PROPORTIONAL CONTROL SOLENOID VALVE (ACTIVE POWER CONTROL)
  • PROPORTIONAL SOLENOID VALVE (1ST SERVICE)
  • SOLENOID VALVE (PARKING BRAKE)
    • Solenoid valve
  • CYLINDER
    • Function
      • Functions of parts
    • Operation
  • TRAVEL MOTOR
• 4. DISASSEMBLY AND ASSEMBLY
  • SERVICE STANDARDS
    • Track roller A
    • Track roller B
    • Sprocket
    • Idler
    • Clearance for pin and bushing
    • Replacing the pin and bushing
  • DRIVE SYSTEM
    • Engine
      • Construction
    • Radiator
      • Construction
      • Removing the engine
      • Installing the engine
    • Hydraulic pump (without high-flow equipment)
      • Construction
    • Hydraulic pump (with high-flow equipment)
      • Construction
      • Removing the hydraulic pump
      • Installing the hydraulic pump
      • Bleeding air from the HST pump
    • Fuel tank
      • Construction
      • Removing the fuel tank
      • Installing the fuel tank
  • TRAVEL SYSTEM
    • Track roller (Serial No.: 412000006 to 412000788)
      • Construction diagram
    • Track roller (Serial No.: 412000789 to 412000918)
      • Construction diagram
    • Track roller (Serial No.: From 412000919)
      • Construction diagram
    • Front idler (Serial No.: 412000006 to 412000871)
      • Construction diagram
    • Front idler (Serial No.: From 412000872)
      • Construction diagram
    • Grease cylinder
      • Construction diagram
    • Travel motor
      • Construction diagram
      • Removing the crawler
      • Installing the crawler
      • Removing the track roller A and C
      • Installing the track roller A and C
      • Removing the track roller B
      • Installing the track roller B
      • Removing the front idler
      • Installing the front idler
      • Removing the travel motor
      • Installing the travel motor
  • FRAME
    • Tilting up the canopy and cab
      • How to raise (tilt up) the canopy and cab
      • How to lower the canopy/cab
    • Lift arm stopper
      • How to install the stopper
      • How to remove the stopper
    • Floor frame
      • Construction
      • Removing the floor frame
      • Installing the floor frame
    • Cover
      • Construction
      • Removing the covers
      • Installing the covers
    • Canopy/cab
      • Construction
      • Removing the canopy/cab
      • Installing the canopy/cab
  • OPERATING DEVICE
    • Hydraulic pilot unit
      • Construction (machine without selector valve)
      • Construction (machine with selector valve)
    • Disassembly and assembly
      • Removal and installation of the accumulator
  • ATTACHMENTS
    • Mechanical quick-hitch
      • Construction
    • Hydraulic quick-hitch
      • Construction
      • Removing the quick-hitch
      • Installing the quick-hitch
    • Lift arm
      • Construction
    • Hydraulic piping (machine without high-flow)
      • Construction
    • Hydraulic piping (machine with high-flow, machine with 2nd auxiliary line piping)
      • Construction
    • Hydraulic piping (machine with high-flow, machine with 2nd auxiliary line piping, machine with ride control)
      • Construction
    • Block coupler (machine without high-flow)
      • Construction
    • Block coupler (machine with high-flow, machine with 2nd auxiliary line piping)
      • Construction
      • Removing the lift arm
      • Installing the lift arm
  • HYDRAULIC TANK
    • Construction
    • Removing the hydraulic tank
    • Installing the hydraulic tank
    • Filling with hydraulic oil
    • Bleeding the air
  • HST PUMP
  • GEAR PUMP
    • Construction
      • Exploded diagram
      • Internal construction diagram
    • Disassembly and assembly
      • General precautions
      • Disassembly
      • Assembly
  • GEAR PUMP (HIGH FLOW)
    • Construction
      • Exploded diagram
      • Internal construction diagram
    • Disassembly and assembly
      • General precautions
      • Disassembly
      • Assembly
  • CONTROL VALVE
    • Construction
      • Standard specification
    • Disassembly
      • General precautions
      • Removing the spool
      • Removing the check valve and load check valve
      • Removing the main relief valve
      • Removing the overload relief valve
      • Removing the flow ratio adjuster valve
      • Removing the arm float valve and leveling cancel valve
      • Removing the solenoid valve
      • Removing other parts
    • Assembly
      • Main unit
      • Spool assembly
      • Check valve, load check valve
      • Installing the overload relief valve
      • Installing the arm float valve and leveling cancel valve
      • Installing the solenoid valve
      • Installing other parts
    • Adjustment
      • Adjusting the flow ratio
      • Flow rate adjustment
  • SUB VALVE
    • Construction
    • Disassembly and assembly
      • General precautions
      • Disassembly
    • Inspection and adjustment
      • Checking the parts
  • PILOT VALVE
    • Construction
    • Special tools
      • Installation jig A
      • Installation jig B
    • Disassembly and assembly
      • General precautions
      • Disassembly
      • Assembly
    • Inspection and adjustment
      • Checking the parts
  • SOLENOID VALVE (PARKING BRAKE)
    • Construction
    • Disassembly and Assembly
      • Disassembly
      • Assembly
    • Inspection and adjustment
      • Checking the parts
  • PROPORTIONAL CONTROL SOLENOID VALVE
    • Construction
    • Disassembly and Assembly
      • Disassembly
      • Assembly
    • Inspection and adjustment
      • Checking the parts
  • PROPORTIONAL CONTROL SOLENOID VALVE (1ST AUXILIARY LINE PIPING)
    • Construction
      • Solenoid proportional pressure reducing valve
    • Disassembly and assembly
      • General precautions
      • Disassembly
      • Assembly
    • Service standards
  • CYLINDER
    • Construction diagram
      • Lift arm cylinder
      • Bucket cylinder (left)
      • Bucket cylinder (right)
    • Disassembly and assembly
      • Service standards
      • Inspection after assembly
    • Tools required
      • Special jigs
      • Disassembly
      • Assembly
  • TRAVEL MOTOR
• 5. TROUBLESHOOTING
  • ABOUT THE TROUBLESHOOTING SECTION
    • Notes on troubleshooting and servicing
  • OVERALL MACHINE
    • No operation is possible.
    • All systems working, but insufficient power.
    • Lift arm and bucket fail to move or are too slow.
  • TRAVELING
    • Traveling fails.
    • Right or left travel speed decelerates and the machine veers to one side.
    • Operating temperature of the travel system is too high.
    • 2nd-speed travel is not possible.
  • LIFT ARM
    • Arm cylinder does not move
    • Arm cylinder moves too slowly or lacks force
    • When the control lever is pulled slowly, the lift arm drops once.
    • Spontaneous drop of the lift arm is too large.
  • BUCKET
    • Bucket cylinder does not move.
    • Bucket cylinder is slow or lacks force.
    • Spontaneous drop of the bucket is too large
  • SERVICE
    • The prescribed pressure is not supplied to the 1st service
  • HST PUMP
    • HST system
    • HST pump
  • GEAR PUMP
  • CONTROL VALVE
  • SUB VALVE
  • PILOT VALVE
  • PROPORTIONAL SOLENOID VALVE (ACTIVE POWER CONTROL, 1ST AUXILIARY LINE PIPING)
  • SOLENOID VALVE (PARKING BRAKE)
  • CYLINDER
• 6. OTHER
  • MAINTENANCE SOFTWARE MANUAL
    • CONTENTS
    • 1. OUTLINE
    • 2. CONNECTION METHODS
      • 2-1. Items needed
      • 2-2. Installation of the PLUS+1 GUIDE Service Tool
      • 2-3. Installation of the Maintenance Tool driver
      • 2-4. Connection to the machine and startup of the Maintenance Software
    • 3. DESCRIPTION OF FUNCTIONS
      • 3-1. Home
      • 3-2. Machine status
        • Inputs1
        • Inputs2
        • Outputs
        • CAN
        • Feedback
        • Error code
        • Vehicle status
      • 3-3. Engine status
        • Engine status
        • DPF status
        • SCR status
      • 3-4. AUX1 Setting
        • AUX1
        • Grip setting
        • Stroke setting
        • 1way current setting
        • 2way current setting
        • HF current setting
      • 3-5. Active power control
        • Active power control (without selector valve)
        • Active power control (with selector valve)
        • Active power control
      • 3-6. Other
        • Option
        • Hourmeter
        • Misc
        • Display
        • Immobilizer
  • AIR CONDITIONER
    • Compressor assembly
    • Condenser assembly
      • Installing the condenser
    • Air conditioner unit
    • AC component
  • AIR CONDITIONER SYSTEM
    • Overview of System Operation
      • Truck and Heavy Equipment Systems
      • Air Conditioner—System Operation
      • Heater System Operation
      • Environmental Effects on System Operation
      • Chapter Review
    • Inspection and Maintenance without gauges
      • Discussion of Inspection & Maintenance Survey Results
      • Visual Inspection – System Off
      • Electrical System Inspection
      • Performance Inspection – Engine Running
      • Heater System Inspection
      • Preventive Maintenance Worksheet
      • Chapter Review
    • Troubleshooting & Service Procedures
      • Troubleshooting Overview
      • The Key–Understanding System Function
      • A Troubleshooting Example
      • Manifold Gauge Set Installation
      • Troubleshooting by Manifold Gauge Set Readings
      • Review of Frequent Problem Areas
      • Conclusion
  • TABLE OF VEHICLE ERROR CODES
  • ENGINE ERROR CODES
  • Language: English
    Format: PDF
    
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