Part of the Case Repair Manuals.
Looking for a Case CX225SR repair manual PDF that actually came from the factory? This 801-page repair manual (OEM #9-40691) covers the CX225SR crawler excavator in both NA and WE builds, from the hydraulic pump all the way back to the digging hammer. You get wiring diagrams, hydraulic schematics, exploded views of every major assembly, error code references, and a full troubleshooting section, plus step-by-step procedures for the boom, dipper, travel motors, and swing system. Real numbers, too. Check piston-to-shoe clearance at 0.4 mm or less during pump rebuilds, then torque the stack valve outlet plug to 103-113 Nm on reassembly. No more chasing hydraulic faults with a pressure gauge and a hunch. Bookmarked with a live text layer, this PDF lets you jump to any section or search any spec on your phone, right beside the machine.
What's Inside This Case CX225SR Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 1-24 | Foreword, Safety Rules, Basic Instructions, Torque, Dimension, Weight, Consumables, Hydraulic Contamination |
| A - Distribution Systems | 25-176 | Primary Hydraulic Power System, Hydraulic Command System, Electrical Power System, Stack Valve, Relief Valve, Hydraulic Pump |
| B - Power Production | 177-293 | Engine, Fuel and Injection System, Air Intake System, Exhaust System, Engine Coolant System, Starting System |
| D - Travelling | 294-360 | Drive Sprocket, Steel Track, Roller, Idler Wheel, Track Tensioning Mechanism |
| E - Body and Structure | 361-422 | Shield, User Controls and Seat, User Platform, Environment Control, Safety Security Accessories |
| F - Frame Positioning | 423-600 | Travelling, Stabilising, Swinging |
| H - Working Arm | 601-732 | Boom Lift, Dipper Lift, Arm Tool Attachment Tilt |
| J - Tools and Couplers | 733-801 | Digging Hammer |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tightening torque for batteries | 20 - 29 Nm | p. 8 |
| Clearance between pistons and shoes | 0.4 mm or less | p. 44 |
| Scratches on the sliding surface of the shoes | 0.4 mm or more | p. 44 |
| Stack valve outlet section — spring/seat screws (22) torque | 19 - 22 Nm | p. 80 |
| Stack valve outlet section — cap (18) screws (78) torque | 8.8 - 10.8 Nm | p. 80 |
| Stack valve — body (28) cover (2) screws (1) torque | 64.7 Nm | p. 114 |
| Voltage for each battery | 12 volts | p. 136 |
| Starter motor voltage | 24 volts | p. 136 |
| Starter motor power | 4.5 kW | p. 136 |
| Total hydraulic circuit capacity | 206 L | p. 31 |
| Hydraulic fluid reservoir capacity | 120 L | p. 31 |
| Main relief valve (standard) pressure | 343 bar | p. 31 |
Case CX225SR Common Problems This Manual Covers
Case CX225SR engine cranks slowly, won't start, or dies right after starting in cold weather
Load test each battery before condemning the starter. Apply a 300 amp discharge; voltage must stay above 10 volts after 30 seconds, per the test on page 148. Each 12 volt battery should deliver 92 Ah and 800 amps cold cranking capacity. Clean corroded terminals and torque the battery hardware to 20 - 29 Nm.
Manual Section: A - Distribution Systems p. 148Boom and bucket move slowly, hydraulic pressure won't build or fluctuates under load
Check the main relief valve setting first: standard relief pressure is 343 bar, listed on page 31. Work through the troubleshooting procedures starting for no rise in pressure and unstable pressure. Inspect the pump pistons and shoes; clearance beyond 0.4 mm means replacement, per page 44. Verify oil level; the circuit holds 206 L total.
Manual Section: Primary Hydraulic Power System TroubleshootingJoystick or control lever sticks in position and will not return to neutral on its own
Remove the valve and inspect the spool for dirt and scoring; clean and oil every part before reassembly. Check the piston return spring and replace it if collapsed or broken. Follow the stack valve troubleshooting for a spool that does not move. Torque the cover screws (22) to 19 - 22 Nm during reassembly.
Manual Section: Stack Valve TroubleshootingNo movement on any hydraulic function even though the engine runs at full RPM
Check the pilot pressure supply before tearing into the main pump. Verify oil level; the reservoir holds 120 L of the 206 L total circuit. Trace the pilot circuit against the hydraulic schematic and confirm the safety lever gate valve is open. Clean the control pump strainer and torque its screws to 39.2 Nm on reassembly.
Manual Section: Hydraulic Command System TroubleshootingEngine speed hunts at idle or will not reach full RPM under load
Check for air in the fuel system first: replace the fuel filter and pre-filter, clean the supply pump strainer, and bleed the lines. Inspect the air cleaner element and check the blockage indicator. Drain water from the fuel tank; it holds 265 L per page 181, and condensation collects when the machine sits low on fuel.
Manual Section: B - Power Production p. 181Frequently Asked Questions
How do I erase fault codes on the Case CX225SR excavator?
To erase fault codes from the electronic control box memory, connect the fault code erasing connector (X13) for at least one second, then turn the start switch to the OFF position for at least half a second. p. 188
What is the procedure for clearing memory on the Case CX225SR engine controller?
All previous and current diagnosis results will be cleared if the engine controller receives the clear memory signal (IN2) being ON (=0 V) for 1 second or longer, followed by the OFF (≠0 V) signal for 0.5 seconds or longer. p. 775
What is the tightening torque for the engine mount bolts on the Case CX225SR?
The engine mount bolts (M10) should be tightened to a torque of 64 - 74 Nm. p. 12
What is the capacity of the hydraulic fluid reservoir for the Case CX225SR?
The hydraulic fluid reservoir has a capacity of 120 liters. p. 31
What is the standard pressure setting for the main relief valve on the Case CX225SR?
The standard pressure setting for the main relief valve is 343 bar (± 3 bar). p. 31
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