Main pump, swing motor, travel motor, main control valve: shop manual 023-00089E walks each of those systems end to end across 625 pages, covering eight Terex TXC hydraulic excavators, 140LC-1 through 470LC-1, in a single Terex TXC shop manual PDF. Hydraulic schematics trace the boom, arm, bucket, swing and travel circuits so you can follow oil from pump regulator to spool, while the electrical section maps the monitoring and engine control systems wire by wire. Cylinder work runs from piston nut removal through slipper seal installation, jig included. Fill the TXC 140LC-1 hydraulic reservoir to 89 liters, then verify the coolant temperature sensor reads 1,372 ohms at 41 degrees C. An excavator parked over a pilot circuit fault costs the whole crew its day. Print the pages your job calls for, let them take the grease at the bench, and keep the bookmarked file clean on the laptop.
What's Inside This Terex TXC 140LC-1 to 470LC-1 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 13-52 | Track Excavator Safety, General Hazard Information |
| Specifications | 53-74 | General Dimensions, Working Range |
| General Maintenance | 75-102 | General Maintenance Procedures, Cleaning and Inspection |
| Upper Structure | 103-158 | Cab, Counterweight, Fuel Tank, Fuel Transfer Pump, Swing Bearing, Swing Reduction Gearbox |
| Lower Structure and Chassis | 159-184 | Track Assembly |
| Engine and Drive Train | 185-222 | Air Conditioner, Drive Coupling |
| Hydraulic System Troubleshooting, Testing and Adjustment | 223-256 | Hydraulic Schematic, Boom Operating Circuit, Arm Operating Circuit, Bucket Operating Circuit, Swing Operating Circuit, Travel Operating Circuit |
| Accumulator | 257-262 | Accumulator Description, Specifications, Precharge Pressure, Diaphragm Positions |
| Cylinders | 263-288 | Cylinder Theory of Operation, Disassembly, Assembly, Piston Nut, Slipper Seal Jig |
| Swing Motor | 289-314 | Swing Motor Theory of Operation, Swing Brake Operation, Relief Valve, Disassembly, Reassembly |
| Travel Motor (with Gearbox) | 315-366 | Travel Motor Theory of Operation, Reduction Gearbox Operation, Disassembly, Reassembly, Special Tools |
| Main Pump (with Regulator) | 367-400 | Main Pump Description, Pump Regulator Operation, Overload Protection, Disassembly, Reassembly |
| Main Control Valve | 401-510 | Control Valve Operation, Main Relief Valve, Overload Relief Valve, Arm Load Holding Valve, Plunger Replacement |
| Hydraulic Schematic (TXC140LC-1) | 511-516 | Hydraulic Schematic, General Notes |
| Electrical System | 517-600 | Monitoring System, Engine Control System |
| Attachments | 601-625 | Boom and Arm, Bucket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Socket Bolt Tightening Torque | 10 kg•m | p. 437 |
| Split Flange Bolt Torque (1/2") | 2.1 - 2.5 kg•m | p. 98 |
| Hydraulic Reservoir Capacity | 89 liters | p. 64 |
| Engine Coolant Temperature Sensor Specification (41°C) | 1,372 ohms | p. 536 |
| Socket Bolt Tightening Torque (Main Control Valve) | 10 kg•m | p. 437 |
| Electrical System Voltage | 24 volts | p. 523 |
| Main Relief Pressure (normal operation) | 330 kg/cm² | p. 70 |
| Split Flange Bolt Torque (3/4") | 3.0 - 3.7 kg•m | p. 98 |
| Hydraulic Oil Temperature (Normal Operating Range) | 45° - 55°C | p. 71 |
| Main Relief Pressure (Normal) | 330 kg/cm2 | p. 70 |
| Main Relief Pressure (Pressure Up) | 350 kg/cm2 | p. 70 |
| Fuel Tank Capacity | 230 liters | p. 64 |
Terex TXC 140LC-1 to 470LC-1 Common Problems This Manual Covers
Terex TXC excavator hydraulic functions sluggish when oil warms up, boom and arm slow to respond
Check hydraulic oil level and condition first: milky oil means air in the system, so tighten suction line clamps and bleed the circuit. Run the actuator speed tests in the troubleshooting procedures on page 250. On the TXC 140LC-1, verify main relief pressure reaches 330 kg/cm2 (page 70); low readings point to the relief valve or pump regulator.
Manual Section: Hydraulic System Troubleshooting p. 250Hydraulic oil leaking around hose fittings, cylinder rods wet after a full shift
Wipe fittings clean and run the machine to operating temperature to find the leak source. Torque 1/2 inch split flange bolts to 2.1 to 2.5 kg•m and 3/4 inch bolts to 3.0 to 3.7 kg•m per the chart on page 98; overtightening splits O-rings. Replace weeping rod seals using the cylinder disassembly procedure starting on page 263.
Manual Section: General Maintenance p. 98Hydraulic oil temperature climbs into the red during continuous digging under heavy load
Verify actual oil temperature with a gauge on the reservoir; normal range is 45 to 55°C (page 71). Blow out the oil cooler fins with compressed air from the fan side. Check for a relief valve stuck partly open dumping flow to tank, and change the oil and filters if the fluid is dark or smells burnt.
Manual Section: Hydraulic System Troubleshooting, Testing and Adjustment p. 223Engine cranks slowly or will not start after the machine sits parked for several weeks
Test both batteries under load; the system runs on 24 volts (page 523), so replace them as a matched pair if either one drops out. Clean and tighten the ground cable at the frame and the starter terminals. Trace any corroded connectors with the wiring diagram before condemning the starter.
Manual Section: Electrical System p. 523Random shutdowns and false warnings on the monitor panel, faults come and go with vibration
Check harness connectors at the engine and monitor panel for green corrosion and backed-out pins. Measure the coolant temperature sensor: it should read 1,372 ohms at 41°C (page 536); replace it if resistance is erratic. Wiggle-test the harness with the engine running and follow suspect circuits through the wiring diagram.
Manual Section: Electrical System p. 536Frequently Asked Questions
How do I reset the failure information log on the Terex TXC 140LC-1?
To delete the memorized record of past failures, open the 'Failure Info' screen in the special menu. Select the 'Delete Fail Log' option. When the screen displays 'All Fail Log will be DELETE', press the 'Enter' button (button 3 on Figure 18) to confirm 'YES' and delete the records. p. 554
What is the procedure for resetting the failure information code 01, 02, or 03?
For failure codes 01 (EPPR v/v short), 02 (Press Up s/v short), or 03 (Swing pri. s/v short), first correct the underlying short circuit problem. Once the problem is corrected, turn the starter switch from 'OFF' to 'ON' to reset the system. p. 555
What is the tightening torque for the main control valve socket bolts?
The socket bolt tightening torque for the main control valve is 10 kg•m. p. 437
What is the fuel tank capacity for the TXC 140LC-1?
The fuel tank capacity for the TXC 140LC-1 is 230 liters (61 U.S. gal). p. 125
What is the recommended tightening torque for the counterweight mounting bolts on the TXC 140LC-1?
The recommended tightening torque for the counterweight mounting bolts on the TXC 140LC-1 is 115 kg•m (830 ft lb). p. 119
How is this Terex TXC 140LC-1 Shop Manual delivered?
Immediate download of the complete 625-page searchable Shop Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Is this Terex TXC 140LC-1 Shop Manual printable?
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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