Stop searching for scattered specs because this 520-page Takeuchi TB80FR Workshop Manual PDF (OEM #CL4E000) lays out the factory procedures to rebuild your compact excavator. Open to a massive section of hydraulic schematics, full electrical wiring diagrams, and step-by-step troubleshooting charts covering the slew system, travel motors, and boom assembly. You get detailed teardown steps for the pilot valves, cylinders, and the complete engine block. Secure the 1/4-inch G-type O-ring seal to exactly 34.3 ±4.9 N·m, and follow the factory sequence to adjust the main relief valve set pressure for the arm circuit. Dead machines drain your profits fast. Download this bookmarked file directly to your tablet, search by keyword to find your spec instantly, and drag it straight to the shop floor.
What's Inside This Takeuchi TB80FR, 4TNE94-98, 4TNE106 (T) Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 9-24 | Safety Precautions, Cautions During Disassembly and Assembly, Cautions During Removal and Installation of the Hydraulic Units, Cautions During Removal and Installation of Piping |
| Specifications | 25-52 | Names of Components, Specification Diagrams, Lifting Capacities, Specification Tables, Mass Tables, Recommended Lubricants |
| Machine Configuration | 53-108 | Drive System, Slew System, Travel System, Upper Frame, Control System, Attachments |
| Hydraulic Units | 109-290 | Hydraulic Pump, Gear Pump, Control Valve, Solenoid Valve, Pilot Valve, Cylinders |
| Troubleshooting | 291-340 | Overall Machine, Machine Travel, Slewing, Boom, Arm, Bucket |
| Engine | 341-520 | General, Troubleshooting, Inspection and Adjustment, Engine Body, Lubrication System, Cooling System |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Fuel Hoses | Replace fuel hoses periodically. | p. 12 |
| O-ring Seal Type (G) 1/8 | 19.6 ±2.0 N·m | p. 22 |
| O-ring Seal Type (G) 1/4 | 34.3 ±4.9 N·m | p. 22 |
| Hydraulic Tank | 75 kg | p. 89 |
| Hydraulic Oil Pressure (Main Relief Valve Set Pressure) Boom, Arm Adjusting Method | 1. Loosen locknut (2), then begin adjusting pressure by turning setting screw (1). Turning clockwise raises the set pressure. Turning counterclockwise .... lowers the set pressure. 2. In order to keep the setting screw from turning after pressure has been adjusted, tighten the locknut while at the same time holding the setting screw firmly in place. 3. Operate the relief valve once more to confirm that the pressure that has been set it stabilized. | p. 43 |
| Hydraulic Oil Pressure (Slewing Relief Valve Set Pressure) Adjusting Method | 1. Loosen locknut (2), then begin adjusting pressure by turning setting screw (1). Turning clockwise raises the set pressure. Turning counterclockwise lowers the set pressure. 2. In order to keep the setting screw from turning after pressure has been adjusted, tighten the locknut while at the same time holding the setting screw firmly in place. 3. Operate the relief valve once more to confirm that the pressure that has been set it stabilized. | p. 45 |
| Tank capacity | 125 L | p. 89 |
| Cap screw | 29.4 N·m | p. 120 |
| Piston and cylinder block assembly clearance S | 0.05 mm or more | p. 122 |
| If it leaks after the sliding surface has been smoothed, replace the rod packing and other seals | Replace the rod packing and other seals | p. 225 |
| Engine Rated Output | 41.2 kW/1900 min⁻¹ | p. 33 |
Takeuchi TB80FR, 4TNE94-98, 4TNE106 (T) Common Problems This Manual Covers
Takeuchi TB80FR joystick engaged but the boom cylinder does not move and the bucket will not lift.
Inspect the pilot valve and spool operation. Check the piston and cylinder block assembly clearance on page 122. If clearance S is less than 0.05 mm, replace the components. Adjust the main relief valve on page 43 by loosening the locknut and turning the setting screw clockwise to raise pressure.
Manual Section: Boom: Boom cylinder doesn’t moveEngine runs fine but the machine loses hydraulic power and exhibits slow movement in all functions.
Check the hydraulic oil level in the 125 L tank on page 89. Inspect the gear pump for abnormal noise or insufficient discharge. Measure the piston and cylinder block clearance on page 122. Ensure clearance S remains at 0.05 mm or more to maintain proper hydraulic flow and pressure.
Manual Section: Overall Machine: All operations can be done, but there is no powerFluid pooling under the undercarriage with hydraulic oil leaking at hose connections and main floating seals.
Clean the affected joints and inspect for twisted seals. Replace all damaged O-rings and backup rings as noted on page 155. Torque the O-ring Seal Type (G) 1/8 fittings to exactly 19.6 ±2.0 N·m using the specifications provided on page 22 to prevent further fluid seepage.
Manual Section: Control Valve (Mono-Block): TroubleshootingCoolant temperature gauge spikes into the red zone and the engine overheats while under heavy load.
Drain the cooling system and remove the thermostat housing. Test the thermostat in heated water to verify the valve opening temperature. Ensure it opens between 71-85 °C as specified on page 382. Replace the thermostat entirely if it fails to open fully within this specific temperature range.
Manual Section: Engine: Quick Reference Table for TroubleshootingPilot lever engaged but no machine operations can be done and the hydraulic pump makes noise.
Verify the hydraulic oil level and inspect the pump coupling on page 294. Tighten the hydraulic pump cap screws to 29.4 N·m as specified on page 120. If the system still fails to build pressure, remove the unit and check for internal wear or a completely sheared drive shaft.
Manual Section: Overall Machine: No operations can be done p. 294Frequently Asked Questions
What are the torque specs for Takeuchi TB80FR arm cylinder bolts?
The piston nut for the arm cylinder should be tightened to 2450 N·m, and the set screw to 31.5 N·m. This information is provided in the "Piston Nut, Set Screw" table within the hydraulic units section. p. 222
Why does my Takeuchi TB80FR have low arm pressure and can't lift?
If the arm cylinder operation is slow or has no power, troubleshooting involves inspecting the hydraulic pump P4, pilot valve, spool, port relief valve, and arm cylinder. You should "Inspect the hydraulic pump P4 which is the source of the hydraulic pressure for the pilot valve." and refer to page V-31 for pilot valve inspection. p. 327
How to troubleshoot Takeuchi TB80FR boom not raising at all?
To troubleshoot the boom not raising, follow the flowchart for "THE BOOM CYLINDER DOESN’T MOVE" on page V-30. This includes inspecting the hydraulic pump P4, pilot valve, spool, port relief valve, and boom cylinder. For example, you should "Inspect the hydraulic pump P4 which is the source of the hydraulic pressure for the pilot valve." p. 320
How to reset Takeuchi TB80FR boom pressure
To adjust the main relief valve pressure for the boom, loosen locknut (2) and then adjust the pressure by turning setting screw (1). Turning clockwise raises the set pressure, while turning counterclockwise lowers it. This procedure is detailed under "Hydraulic Oil Pressure (Main Relief Valve Set Pressure) Boom, Arm." p. 43
What format is this Takeuchi TB80FR manual in?
A 520-page Workshop Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Can I print specific sections of this Takeuchi TB80FR?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
Does this Takeuchi TB80FR manual include hydraulic?
Yes. The manual includes hydraulic circuit diagrams, system schematics, and component specifications with pressure ratings.
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