Every one of these 633 pages stays on a single machine: the Terex TXC 225LC-1 hydraulic excavator (OEM #023-00081E), from the swing reduction gearbox out to the final drive. Hydraulic schematics trace fluid through the Kayaba main control valve and the pilot pressure circuits; wiring diagrams map the engine starting circuit, the monitoring system, and the overload warning device. Step-by-step procedures, troubleshooting guides, exploded views for every major assembly, and electrical-system error codes. The GM35VL travel motor's M24 mounting bolts torque to 523 ft lb, and the overload relief valves set at 360 kg/cm² (5,112 psi). Your machine is down and the clock is running. It's bookmarked and searchable, so open the PDF on a tablet, walk to the machine, and start wrenching.
What's Inside This Terex TXC 225LC-1 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | - | Track Excavator Safety, General Safety Essentials, Hazard Information, Mounting and Dismounting, Fluid Fire Hazards |
| Specifications | - | General Dimensions, Working Range, Engine Performance Curves, Weight of Workload Materials, Performance Tests |
| General Maintenance | - | Welding Precautions, Hydraulic System Precautions, Maintenance Service and Repair, Cleaning and Inspection, Bearing Inspection |
| Standard Torques | - | Metric Fasteners, U.S. Fasteners, Phosphate Coated Hardware, Hose Clamps, Split Flanges |
| Upper Structure - Cab | - | Cab Removal, Cab Installation, Wiring Connectors, Safety Lever |
| Upper Structure - Fuel Tank | - | Fuel Tank Removal, Fuel Tank Installation, Fuel Level Display, Priming Procedures, Fuel Tank Capacity |
| Upper Structure - Swing Reduction Gearbox | - | Theory of Operation, Special Tools, Disassembly, Cleaning and Inspection, Reassembly |
| Lower Structure and Chassis - Track Assembly | - | Track Tension, Track Shoes and Links, Front Idler Roller, Lower Roller, Upper Roller |
| Engine and Drive Train - Air-Conditioner | - | Refrigerant Circulation, Control Panel, Troubleshooting, Refrigerant System Repairs, Leakage Check |
| Hydraulics - Hydraulic System Troubleshooting, Testing and Adjustment | - | General Notes, Hydraulic Schematic, Operation of Components, Pilot Pressure, Power Mode Valve, Swing Priority Valve |
| Hydraulics - Cylinders | - | Theory of Operation, Special Tools, Disassembly, Assembly, Piston Nut, Slipper Seal Jig |
| Hydraulics - Main Pump (with Regulator) | - | Gear (Pilot) Pump, Relief Valve, Pump Regulator Operation, Overload Protection, Disassembly, Reassembly |
| Hydraulics - Main Control Valve (Kayaba) | - | Neutral Passage, Single Operation, Combined Operation, Antidrift Valve, Main Relief Valve, Disassembly, Reassembly |
| Electrical System | - | Troubleshooting, Electric Supply System, Engine Starting Circuit, Monitoring System, Engine Control System, Overload Warning Device |
| Attachments - Bucket | - | Tooth Inspection and Replacement, O-Ring Replacement, Shimming Procedures, Attachment, Removal and Reversal |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Travel Motor (With Gearbox) (GM35VL) Bolt (19) M24 (P3.0) torque | 72.3 ±11 kg•m (523 ±7 ft lb) | p. 346 |
| Travel Motor (With Gearbox) (GM35VL) Bolt (35) M12 (P1.75) torque | 10.4 ±1.6 kg•m (75 ±11 ft lb) | p. 346 |
| Hydraulic filter full flow filtration | 10 micron | p. 230 |
| Air filtration system filter cleaning interval | every 500 hours | p. 189 |
| Overload relief valves setting | 360 kg/cm2 (5,112 psi) | p. 231 |
| Swing motor relief valve setting | 285 kg/cm2 (4,052 psi) | p. 234 |
| Main Pump Output (TXC 225LC-1) | 106.0 cc/rev (6.47 in3/rev) (1 pump) | p. 389 |
| Gear (Pilot) Pump Output (TXC 225LC-1) | 15 cc/rev | p. 389 |
| Fuel Tank Capacity | 350 liters | p. 54 |
| Hydraulic System Capacity | 240 liters | p. 54 |
| Standard 600 mm (24") shoe Ground Pressure | 0.45 kg/cm² | p. 54 |
| Engine Power (Max) | 150 ps @ 1,950 rpm | p. 57 |
Terex TXC 225LC-1 Common Problems This Manual Covers
Hydraulic power drops after 30 minutes of operation and pump output becomes aerated p. 237
Inspect the hydraulic tank and verify the fluid level meets the 240 liters capacity on page 54. Drain the oil and check the suction screen for debris. If clear, test the pilot pressure at the pump minimum speed setting on page 237 to ensure it reads 40 ±5 bar.
Manual Section: Hydraulic System Troubleshooting, Testing and AdjustmentBoom and arm movements feel slow or weak under heavy load and cylinders fail to hold pressure p. 480
Test the boom up actuator speed in standard mode to verify it meets the 3.3 ±0.4 seconds specification on page 61. Check the main control valve overload relief valve cap torque and tighten it to 7.95 - 8.97 kg•m (58 - 65 ft lb) as specified on page 480.
Manual Section: Main Control Valve (Kayaba) TroubleshootingHydraulic system overheats abnormally and relief valve sticks open due to debris in the suction circuit p. 231
Measure the overload relief valves setting to confirm it operates at 360 kg/cm2 (5,112 psi) using the guidelines on page 231. Remove the valve assembly, clean out any contamination, and replace the 10 micron hydraulic filter element as noted on page 230 before testing the system.
Manual Section: Hydraulic Problems TroubleshootingSwing motor fails to operate, coasts excessively, or only allows upper structure movement in one direction p. 234
Check the swing motor relief valve setting to ensure it holds 285 kg/cm2 (4,052 psi) as outlined on page 234. Inspect the swing reduction gearbox for oil leakage and verify the swing brake releases fully when the joystick control valve is actuated.
Manual Section: Swing System TroubleshootingEngine will not start, battery fails to charge, or power mode does not change during operation
Read the failure information codes to isolate the starting circuit fault. Inspect the battery terminals and starter motor wiring for corrosion. Test the engine output to ensure it reaches the maximum power rating of 150 ps @ 1,950 rpm listed on page 57.
Manual Section: Electrical System TroubleshootingFrequently Asked Questions
How do I reset the Terex TXC 225LC-1 monitor or controller?
The manual describes specific reset procedures for the monitor. To reset the operation hours (service reminders), navigate to the 'Operating Info' screen and press the 'Enter' button ( , 3 on Figure 18) when 'Reset Hrs' is highlighted. To clear memorized failure records (error codes), go to the 'Failure Info' screen and press the 'Enter' button ( , 3 on Figure 18) when 'Delete Fail Log' is selected.
What are the torque specs for Terex TXC 225LC-1 track roller or final drive bolts?
For the travel motor reduction gear, which is part of the final drive, the allen head bolt (19) should be tightened to a torque of 72.3 kg•m (523 ft lb). Specific torque values for track roller bolts are not explicitly listed in the manual, but general torque tables for metric and U.S. fasteners are provided.
What do Terex TXC 225LC-1 error codes mean?
The manual lists several failure codes and their meanings. General codes include '0 x Short Circuit', '1 x Open circuit', '2 x Output error', '3 x Output error', and '8 x Communication'. More specific codes are '82 Communication Err!!' (Communication error between e-EPOS controller and instrument panel), '01 EPPR v/v short' (Short Circuit), '02 Press Up s/v short' (Short Circuit), and '03 Swing pri. s/v short' (Short Circuit).
How do I reset hydraulic pressure or service reminders on a Terex excavator?
To reset service reminders, specifically the operating hours for filters and oil, do so after changing them. The manual states: 'After changing the filter and oil, reset the operating hour and then the operating hours until the next service interval can be easily checked.' Hydraulic pressure is typically adjusted to specified values (e.g., pilot pressure, main relief pressure) rather than reset, with procedures detailed for these adjustments.
What format is this manual in?
It's a 633-page searchable PDF, ready to download right away. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Am I able to print pages from this manual?
The PDF is DRM-free, so print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
Are hydraulic system diagrams in this Terex TXC 225LC-1 Shop Manual?
Full hydraulic system diagrams are included, covering circuits, valve locations, and hydraulic component specs for the Terex TXC 225LC-1.
Document Quality
This is a native digital PDF document, allowing you to search and copy the full text. The text quality is consistently crisp and easy to read on every page. Diagrams and illustrations are a mix; some are sharp vector graphics, while many others appear to be scanned raster images or photos that pixelate when zoomed, though their labels remain mostly readable. The hydraulic and electrical schematics are clear vector images. The pages are clean with no notable scan artifacts or skewed content, and you will find several blank pages throughout, typically at the end of sections.
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