Need real factory data for your compact excavator? This 355-page Takeuchi TB108 workshop manual PDF (OEM #CB5E002) walks you through the whole machine, from the slew, travel, and drive systems to the Yanmar diesel engine. Inside: hydraulic schematics for the gear pump, control valve, cylinders, and swivel joint, electrical wiring diagrams, exploded views of the upper frame and drive components, and a full troubleshooting section covering travel, slewing, boom, arm, bucket, and dozer blade faults. You get the complete Yanmar engine service section too, disassembly through inspection. Set the 1/4-inch taper thread hose fittings to 29.4 Nm and the 1/2-inch to 88.3 Nm before you chase a leak anywhere else. No more hunting hydraulic drips with a rag and a guess. Bookmarked with a full text layer: jump to a section, search a spec, and get wrenching.
What's Inside This Takeuchi TB108 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety Precautions | 3-8 | Safety Alert Symbol, Signal Words, Protective Equipment, Fire Extinguisher, Battery Hazards, Waste Disposal |
| Cautions During Disassembly and Assembly | 9 | Machine Condition Check, Matching Marks, Seal Replacement, Press Usage, Joining Surface Cleaning, Snap Ring Installation |
| Cautions During Removal and Installation of the Hydraulic Units | 9 | Hydraulic Oil Temperature, Residual Pressure, Caps and Plugs, Hydraulic Cylinder Plating, Air Bleeding, Hydraulic Tank Pressurization |
| Cautions During Removal and Installation of Piping | 10 | Hydraulic Hose Installation, Fitting Torque, Spanner Usage, Leakage Confirmation |
| Handling of Seals | 10 | O-Ring Groove Cleaning, Floating Seal Handling, Oil Seal Lip Lubrication, Seal Damage Prevention |
| Safety Precautions | 11-22 | Safety alert symbol, Signal words, Personal protective equipment, Fire safety, Work area preparation |
| Specifications | 23-48 | Machine dimensions, Lifting capacities, Specification tables, Mass tables, Servicing standards |
| Machine Configuration | 49-94 | Drive system, Slew system, Travel system, Upper frame, Control system, Electrical wiring |
| Hydraulic Units | 95-180 | Gear pump, Control valve, Cylinders, Travel motor, Slew motor, Swivel joint |
| Troubleshooting | 181-216 | Troubleshooting procedures, Machine travel, Slewing, Boom, Arm, Bucket, Dozer blade |
| Engine Service Manual | 217-355 | Yanmar diesel engine, Engine specifications, Periodic maintenance, Engine disassembly, Engine inspection |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic Hoses Taper Thread (R) 1/8 Torque | 11.8 ±1.2 Nm | p. 19 |
| Hydraulic Hoses Taper Thread (R) 1/4 Torque | 29.4 ±2.9 Nm | p. 19 |
| Fuel tank capacity | 8 L | p. 58 |
| Tank level capacity | 7.3 L | p. 89 |
| Engine Oil Pan Capacity (Upper limit) | 1.7 L | p. 35 |
| Hydraulic Tank Capacity (Total system) | 14 L | p. 35 |
| Engine Coolant Capacity | 2.8 L | p. 35 |
| Travel Reduction Gear Lubricant Capacity | 0.33 L | p. 35 |
| Standard Valve Clearance | 0.15 to 0.25 mm | p. 266 |
| Fuel Injection Nozzle Pressure | 11.8 to 12.8 MPa | p. 267 |
| Thermostat Valve Opening Temperature | 69.5 to 72.5 deg C | p. 274 |
| Starting Motor Nominal Output | 1.1 kW | p. 331 |
Takeuchi TB108 Common Problems This Manual Covers
Takeuchi TB108 boom drops slowly under load, arm and bucket movement sluggish after pump replacement
Check the gear pump troubleshooting chart for low discharge volume and high noise. Verify hydraulic tank level; total system capacity is 14 L. Bleed air from the lines following the hydraulic unit cautions on page 9, then confirm the pump fixing bolts are torqued to 55 N·m before retesting.
Manual Section: Hydraulic UnitsHydraulic hoses seep oil at fittings after seal replacement, drips return within hours
Clean the O-ring grooves and fit new seals; never reuse a crushed O-ring. Torque taper thread fittings to the values on page 19: 29.4 Nm for R 1/4, 53.9 Nm for R 3/8. Hold the hose side with a second spanner so the line cannot twist, then run the machine and confirm no leakage.
Manual Section: Cautions During Removal and Installation of Piping p. 19Engine cranks slowly or fails to start, white smoke on cold mornings
Test battery voltage and the starting motor; nominal output is 1.1 kW per page 331. Check fuel level in the 8 L tank and bleed the fuel system. Measure valve clearance and adjust to 0.15 to 0.25 mm, page 266, then test injection nozzles at 11.8 to 12.8 MPa using the engine troubleshooting steps from page 217.
Manual Section: Engine Service Manual p. 217Engine temperature climbs during trenching, coolant boils out of the reservoir within an hour
Drain and refill the cooling system with 2.8 L of fresh coolant; capacity is listed on page 35. Remove the thermostat and test it in heated water; it must begin opening between 69.5 and 72.5 deg C per page 274. Replace it if it stays closed, then clean the radiator fins and check fan belt tension.
Manual Section: Engine Service Manual p. 274Hot hydraulic oil sprays from fittings when loosening lines during routine service
Lower the boom, bucket, and dozer blade to the ground and shut the engine off before cracking any fitting. Release residual pressure and let the oil cool per the cautions on page 9. Loosen fittings slowly with a rag over the joint; the 14 L system holds pressure long after shutdown. Cap open ports immediately.
Manual Section: Cautions During Removal and Installation of the Hydraulic Units p. 9Frequently Asked Questions
What are the recommended service intervals for the engine?
The engine requires various maintenance tasks at different intervals. For example, lube oil and filter replacement is required after the first 50 hours, and then every 250 hours or 3 months thereafter. Cooling water replacement is required every 1,000 hours or one year, and fuel nozzle cleaning is required every 1,500 hours. p. 249
What are the fluid capacities for the 2TNV70 engine?
For the 2TNV70 engine, the total lubricant capacity for the oil pan is 1.7 liters, with an effective capacity of 0.7 liters. The cooling water capacity for the engine only is 0.6 liters. p. 235
How can I troubleshoot an engine that will not start?
If the engine does not start, first check the fuel level and ensure the fuel system is bled of air. Also, inspect the electrical system, specifically checking for a battery voltage drop or a starting motor defect. Refer to the troubleshooting guide on page 277 for a comprehensive list of potential causes and corrective actions. p. 277
What is the standard valve clearance for the engine?
The standard valve clearance for both intake and exhaust valves is 0.15 to 0.25 mm when the engine is cold. p. 266
What are the torque specifications for the cylinder head bolts?
The cylinder head bolts should be tightened in two steps. The first step is 26.0 to 30.0 N·m (2.7 to 3.1 kgf·m), and the second step is 53.9 to 57.9 N·m (5.5 to 5.9 kgf·m). p. 296
How quickly can I access this Takeuchi TB108 manual after buying?
Immediate download of the complete 355-page searchable Workshop Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Are there any print restrictions on this Takeuchi TB108 manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
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