Part of the Case Repair Manuals.
Need the factory book for your 2004 Case CX75SR or CX80? This 862-page repair manual (OEM #9-93290GB) covers both crawler excavators, from the primary and secondary hydraulic power systems down to the swing circle and boom lift cylinders. Inside: complete wiring diagrams for the electrical power and lighting systems, hydraulic schematics for the command and power circuits, and a full troubleshooting section for engine, fuel injection, and travel faults. You get every torque table split by model, plus exact wear limits: the lower roller diameter wears to 112 mm before replacement, and hand command valve shaft play tops out at 2 mm before you swap components. Your undercarriage, boom, and hydraulics don't forgive guesswork. This one opens on your phone, tablet, or shop laptop, with bookmarks built in so you jump straight to Frame Positioning or Working Arm without scrolling past 800 pages.
What's Inside This Case CX75SR, CX80 Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 1-30 | Foreword, Safety Rules, Basic Instructions, Torque CX75SR, Torque CX80, Dimension CX75SR, Dimension CX80, Weight CX75SR |
| Distribution Systems | 31-184 | Primary Hydraulic Power System, Secondary Hydraulic Power System, Hydraulic Command System, Electrical Power System, Lighting System |
| Power Production | 185-264 | Engine, Fuel and Injection System, Air Intake System, Exhaust System, Engine Coolant System, Lubrication System, Starting System, PTO Power in |
| Travelling | 265-334 | Wheels and Tracks Tracks, Steel Track, Rubber Track, Track Tensioning Mechanism, Roller |
| Body and Structure | 335-400 | Shield, User Controls and Seat, User Platform, Environment Control Heating, Ventilation and Air-Conditioning, Safety Security Accessories Safety |
| Frame Positioning | 401-604 | Travelling Travel, Stabilising Ballasting, Swinging Circular Swing |
| Working Arm | 605-802 | Boom Lift, Boom Swing, Dipper Lift, Arm Tool Attachment Tilt |
| Tools and Couplers | 803-862 | Digging Hammer, Landscaping Dozer Blade |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Roller Lower roller - Wear limit (diameter) | 112 mm | p. 275 |
| Roller Lower roller - Wear limit (B) | 11 mm | p. 275 |
| Command valve Hand command valve - Replacement criteria (play on shaft pin and seal) | Replace the components if the wear on the shaft pin and the seal causes play in the controls of more than 2 mm | p. 544 |
| Rubber track - Wear limit (lugs) | minimum 5 mm | p. 294 |
| Hydraulic motor - Leakage test (drift) | greater than 1 m | p. 470 |
| Hydraulic motor - Leakage test (oil quantity from drain) | greater than 1 L/min | p. 471 |
| Engine Oil Capacity | 9.6 L | p. 189 |
| Total Hydraulic Circuit Capacity | 95 L | p. 37 |
| Main Hydraulic Pump Max Flow | 2 x 71.4 L/min | p. 37 |
| Pilot Circuit Main Relief Valve Pressure | 42 bar | p. 37 |
| Battery Voltage | 12 volts | p. 152 |
| Alternator Current | 50 amps | p. 140 |
Case CX75SR, CX80 Common Problems This Manual Covers
Case CX80 hydraulic pump loses pressure and bucket response goes soft under load
Check the primary hydraulic power system troubleshooting chart. Verify the filter isn't clogged and inspect pump output; total circuit capacity runs 95 L with main pump flow rated at 2 x 71.4 L/min. If pressure still won't rise, check the pilot circuit relief valve, set at 42 bar, before condemning the pump.
Manual Section: Primary Hydraulic Power System TroubleshootingEngine cranks slowly or won't start even with a fully charged battery
Check battery voltage first; system runs on 12 volts, and confirm the alternator on page 140 is putting out its rated 50 amps under load. Inspect starter connections for corrosion and verify engine oil is filled to the 9.6 L capacity on page 189, since low oil can trigger a safety cutout on some starting circuits before you chase the starter motor itself.
Manual Section: Starting System p. 140Excavator drifts or pulls to one side when travelling in a straight line
Check the travel troubleshooting chart for speed differences between sprocket wheels. Test hydraulic motor drift directly: run the leakage test on page 470 and flag any motor drifting more than 1 m. Compare drain oil quantity between motors per page 471; if one motor drains more than 1 L/min over its pair, pull and repair or replace that motor.
Manual Section: Travelling Travel TroubleshootingUndercarriage rollers rattle or run rough after heavy hours in the dirt
Pull the lower rollers and measure the outer diameter against the wear limit on page 275; condemn at 112 mm. Check the (B) dimension too, replacing anything worn past 11 mm. Also inspect upper rollers against their 76 mm diameter wear limit. Grease and reseat before reassembly, and replace both rollers on a side together to keep wear even.
Manual Section: Wheels and Tracks p. 275Joystick controls feel loose or sloppy with noticeable play before the machine responds
Check the hand command valve shaft pin and seal per the replacement criteria on page 544; replace components once play in the controls exceeds 2 mm. Inspect for insufficient pilot pressure at the solenoid valve outlet as covered in the hydraulic command system troubleshooting before assuming the valve body itself is worn.
Manual Section: Hydraulic Command System TroubleshootingTrack tension keeps loosening and the track slaps against the frame on rough ground
Check the track tensioning mechanism's shock absorber preload; it should sit at 402 mm per page 304. Re-grease the tensioning cylinder and re-check after a short run, since a preload that won't hold usually points to a leaking grease valve or worn shock absorber rather than the track itself.
Manual Section: Track Tensioning Mechanism p. 304Frequently Asked Questions
What are the torque specifications for the turntable bearing on the Case CX75SR?
For the Case CX75SR, the turntable bearing (chassis and upperstructure) requires a torque setting of 252 - 283 Nm. This is achieved using an M16 screw with a 24mm wrench. p. 11
How do I reset the hydraulic system on a Case CX80 excavator?
To reset the hydraulic system, you should follow the 'Decontaminating' procedure, which involves preparing a portable filter, draining and cleaning the reservoir, replacing filters, and filling with clean hydraulic fluid (refer to page 64). Additionally, the system must be 'Bled' after component replacement to prevent damage (refer to page 63). p. 63
What is the total hydraulic fluid capacity for the Case CX75SR?
The total hydraulic circuit capacity for the Case CX75SR is 95 L. The hydraulic fluid reservoir specifically holds 50 L. p. 37
What is the engine oil capacity for the Case CX75SR/CX80?
The engine oil capacity for both the Case CX75SR and CX80 models is 9.6 L. p. 45
How will I receive this Case CX75SR, CX80 Repair Manual?
Immediate download of the complete 862-page searchable Repair Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Am I able to print pages from this Case CX75SR, CX80 manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Are hydraulic system diagrams in this Case CX75SR, CX80 Repair Manual?
Yes, this Case CX75SR, CX80 Repair Manual includes hydraulic system diagrams, circuit schematics, and component specifications.
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