Part of the Case Repair Manuals.
This is the complete Case IH factory service manual for the STX280, STX330, STX380, STX430, STX480 and STX530 Steiger tractors, covering both the wheeled and QuadTrac versions. It is organized into functional groups: General, Safety & Maintenance, Engine, Cooling & Fan Drive, Electrical System, Steering, Cab & Controls, Powershift Transmission & Driveline, Axles & Undercarriage, and Hydraulic System. Each group carries specifications, torque data, troubleshooting, and step-by-step removal, disassembly, inspection, assembly, and installation procedures, with model-specific engine and undercarriage coverage and the pressure checks these high-horsepower articulated tractors require.
What's Inside This Case IH STX280–STX530 Series Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| General, Safety & Maintenance | Standard Torque Specifications, Safety, Lubrication and Maintenance, And General Service Data for the STX280-STX530 Steiger Tractors | |
| Engine | Engine Removal and Installation for the STX280/330, STX380/430 and STX480/530, Air Induction System, And Engine Specifications | |
| Cooling & Fan Drive | Viscous Fan Drive and Hydraulic Fan Drive Test, Cooling System, And Thermostat and Radiator Service | |
| Electrical System | Electrical System Operation and Troubleshooting, Battery Servicing and Testing, Charging and Starting, And Wiring | |
| Steering | Steering Hand Pump, Priority and Control Valve Removal and Installation, Steering Column Repair, And Steering Test and Adjustment | |
| Cab & Controls | Center Console, Steering Column, Pedals and Switches, Operator Controls, And Instrumentation | |
| Powershift Transmission & Driveline | Powershift Transmission Removal and Installation, Transmission Controls and Calibration, PTO, And Driveline | |
| Axles & Undercarriage | Front and Rear Axles, Final Drives, Wheels, And the QuadTrac Undercarriage and Tracks | |
| Hydraulic System | Hydraulic Pump, Remote Control Valves, Three-Point Hitch, TwinFlow Hydraulics, And Hydraulic Troubleshooting and Pressure Checks |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| STX380-STX530 | ||
| Rated Power | 384 HP (286 kW) STX380 / 434 HP (324 kW) STX430 / 485 HP (362 kW) STX480 / 535 HP (399 kW) STX530 | |
| Peak Torque (1400 RPM) | 1412 lb-ft (1914 Nm) STX380 up to 1873 lb-ft (2539 Nm) STX530 | |
| STX280-STX530 | ||
| Rated Engine Speed | 2000 RPM (2100 RPM on STX530) | |
| Fuel Tank Capacity | 200 gal (758 L) STX280/330; 300 gal (1136 L) STX380-STX530 | |
| Coolant Capacity | 11.4-12.4 gal (43-47 L) STX280/330; 18.25-21.0 gal (69-80 L) STX380-STX530 | |
| Standard Hydraulic Pump | 40 GPM (151 L/min) at 2000 PSI; High-Output 55 GPM (208 L/min) | |
| Total Hydraulic System Capacity | 63 gal (238 L) STX280/330; 71 gal (269 L) Wheel / 80 gal (303 L) QuadTrac STX380-STX530 | |
| STX280, STX330 | ||
| Maximum Steering Pressure | 2700 PSI (18,613 kPa) | |
Case IH STX280–STX530 Series Common Problems This Manual Covers
Weak hydraulics, slow or failing three-point hitch, or heavy steering
Follow the Hydraulic System and Steering groups. Measure pump output (40 GPM standard / 55 GPM high-output at 2000 PSI) and steering pressure (2700 PSI on the STX280/330) against spec, and check the priority and control valves. A single pump or relief fault affects several functions, so confirm pressure before replacing a valve or cylinder.
Manual Section: Hydraulic SystemEngine down on power or not reaching rated horsepower
Use the Engine and Air Induction group with the Specifications. Verify the air induction system, fuel delivery, and rated engine speed (2000 RPM, 2100 on the STX530) against the rated power and torque figures. A power loss under load is usually an air or fuel restriction, checked before internal engine work.
Manual Section: EnginePowershift transmission shifts harshly, slips, or will not engage
Work the Powershift Transmission & Driveline group. Confirm transmission oil level and the control and calibration first, then run the clutch-pack pressure checks against spec. Harsh shifting or slipping commonly traces to oil level, calibration, or pressure rather than wear, so measure and calibrate before opening the transmission.
Manual Section: Powershift Transmission & DrivelineFrequently Asked Questions
My STX loses hydraulic power, the hitch is weak, or steering is heavy. Where do I start?
Go to the Hydraulic System and Steering groups. Check the standard pump output (40 GPM at 2000 PSI, or 55 GPM high-output) and, on the STX280/330, the maximum steering pressure of 2700 PSI, measuring against spec before opening a valve. A weak hitch or heavy steering is most often a pump, relief, or priority-valve pressure fault, and the manual's pressure checks isolate it before teardown.
The engine is down on power or will not make rated horsepower. What should I check?
Use the Engine and Air Induction group with the Specifications. These tractors are rated 384 HP (STX380) up to 535 HP (STX530) with peak torque at 1400 RPM, so verify the air induction system, fuel delivery, and rated engine speed (2000 RPM, 2100 on the STX530) against spec. A power loss under load is usually air or fuel restriction, checked before condemning the engine.
My Powershift transmission shifts harshly, slips, or will not engage. Where do I look?
Work the Powershift Transmission & Driveline group. Check the transmission oil level and the control and calibration first, then run the pressure checks against spec. Harsh shifting, slipping, or a failure to engage usually traces to oil level, calibration, or clutch-pack pressure rather than internal wear, so measure and calibrate before removing the transmission.
What are the fluid capacities for the STX280 through STX530?
The Specifications list them by model: fuel tank 200 gal (758 L) on the STX280/330 and 300 gal (1136 L) on the STX380-STX530; coolant 11.4-12.4 gal on the smaller pair and 18.25-21.0 gal on the larger; and total hydraulic system capacity 63 gal (238 L) on the STX280/330, 71 gal (269 L) on wheeled and 80 gal (303 L) on QuadTrac STX380-STX530. Use the Lubrication and Maintenance section for the full service list.
Does this manual cover both the wheeled and QuadTrac tractors and all six STX models?
Yes. It is the factory service manual for the STX280, STX330, STX380, STX430, STX480 and STX530 Steiger tractors in both wheeled and QuadTrac form, with model-specific engine removal (STX280/330, STX380/430, STX480/530) and the undercarriage, and the shared electrical, steering, Powershift, and hydraulic service.
How quickly can I access this Case IH STX280, STX330, STX380, STX430, STX480?
A 2625-page Repair Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Are there any print restrictions on this Case IH STX280, STX330, STX380?
Zero restrictions. The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
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