This Terex Shop Manual is a 633 page factory workshop guide for the TXC 225LC-1 hydraulic excavator, serial number 30001 and up, powered by the DB58TIS diesel engine. It is written in English with a searchable, printable text layer.Coverage runs across the whole machine: safety, specifications and standard torques, the cab and fuel tank, the swing reduction gearbox, the track undercarriage, and the air conditioning system. The hydraulics receive deep treatment, including system troubleshooting, testing and adjustment, the cylinders, the main pump and regulator, and the Kayaba main control valve.The electrical system, the boom and arm, and the bucket sections round out the manual, giving an owner or heavy equipment technician the procedures and settings needed to diagnose and repair the excavator.
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 fades when warm
Hydraulic functions that weaken after the machine warms up often trace to aerated or contaminated oil, a clogged suction screen, or a sticking relief valve. This section covers system troubleshooting, testing, and pressure adjustment.
Manual Section: Hydraulics - Hydraulic System Troubleshooting, Testing and AdjustmentSlow or weak boom and arm
Main pump wear or a regulator fault leaves the boom, arm, and bucket slow under load. This section covers the pump regulator operation, overload protection, and pump overhaul.
Manual Section: Hydraulics - Main Pump (With Regulator)Cylinder drift and internal leakage
Worn piston seals let a cylinder drift or lose holding power under load. This section covers cylinder disassembly, seal replacement, and reassembly with the correct jig and piston nut.
Manual Section: Hydraulics - CylindersSticking main relief valve
Debris or contamination can make a relief valve stick, causing pressure loss and weak digging. This section covers the main control valve, the main relief valve, and the antidrift valve service.
Manual Section: Hydraulics - Main Control Valve (Kayaba)Rapid undercarriage wear
Poor track tension and skipped greasing wear the rollers, idlers, and links early. This section covers track tension, shoes and links, and idler and roller service.
Manual Section: Lower Structure and Chassis - Track AssemblyNo-start or intermittent electrics
A weak battery, a starter fault, a blown fuse, or a loose connection leaves the machine hard to start or acting up. This section covers the electric supply, the engine starting circuit, and the monitoring system.
Manual Section: Electrical SystemFrequently Asked Questions
Which machine does this manual cover?
It covers the Terex TXC 225LC-1 hydraulic excavator, serial number 30001 and up, powered by the DB58TIS diesel engine.
Does it include hydraulic pump specifications?
Yes. The main pump displacement is listed as 108.7 cc per revolution, with the pilot pump and flow rates alongside it in the main pump section. p. 401
Does it give final drive torque values?
Yes. The travel motor and gearbox section lists the mounting bolt torque figures, such as the M24 bolt at 72.3 kg-m. p. 346
Does it cover hydraulic system troubleshooting?
Yes. A dedicated hydraulics section covers system troubleshooting, testing, and adjustment, including the pilot pressure, the power mode valve, and the swing priority valve.
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.
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