Part of the Case Repair Manuals.
Case Solid State Selective Steering is the system that scares people off a 4490 or 4690. It gets real coverage here: How It Works theory, testing procedures, the steering system wiring diagram, and the column, pump, valve and cylinder work behind it.
From there the manual covers the rest of the articulated tractor. That includes the 504BDT turbo diesel down to wet sleeves and main bearings, Robert Bosch injection, the RPS-34 power shift, PTO, axles and planetaries. Brakes, the hitch, remote hydraulics and cab air are in here too.
Nothing stalls a job like a cylinder head sitting on the bench with no torque figure. The 210 ft. lbs. and the tightening sequence are both in here. Buy it once and it stays with this tractor, ready when the field is waiting.
What's Inside This Case 4490/4690 Manual
| System | Pages | Key Topics |
|---|---|---|
| Table of Contents | 1-2 | Section Index |
| General | 3-102 | Specifications, Lubrication, Engine Specifications, Fuel System Specifications, Steering System Specifications, Brake System Specifications |
| Engines | 103-464 | Engine Removal, Cylinder Head and Valve Train, Cylinder Block and Pistons, Lubrication System, Cooling System, Turbocharger |
| Fuel System | 465-510 | Fuel Filters, Robert Bosch Fuel Injection Pumps, American Bosch Fuel Injectors |
| Electrical | 511-694 | System Troubleshooting, Wiring Diagrams, Starting Motors, Battery Servicing, Delco-Remy Alternator System |
| Steering | 695-957 | Solid State Selective Steering, Steering Column, Pump and Valve, Steering Cylinder, Rear Steering Valve |
| Power Train | 958-1309 | Rps-34 Power Shift Transmission, Torque Limiter Clutch, Four Speed Transmission, Axles and Planetaries |
| Brakes | 1310-1343 | Brake System, Service and Repair |
| Hydraulics | 1344-1627 | Hitch System, Hydraulic Oil Filters, Hydraulic Pump, Remote Hydraulic Valves, Flow Divider |
| Accessories | 1628-1753 | Air Conditioning System, Cab Blower, Operator Seat Adjustments, Safety Decal Location |
| How It Works | 1754-1805 | System Operation Theory |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine Type | 6-cyl, 4-stroke, turbocharged (4490); turbocharged, intercooled (4690) | p. 7 |
| Engine Firing Order (504BDT Engine) | 1-5-3-6-2-4 | p. 7 |
| Engine Bore (504BDT Engine) | 4-5/8 Inches (117.5 mm) | p. 7 |
| Engine Stroke (504BDT Engine) | 5 Inches (127 mm) | p. 7 |
| Engine Piston Displacement (504BDT Engine) | 504 Cubic Inches (8 259 cm³) | p. 7 |
| Engine Compression Ratio (504BDT Engine) | 15.75 to 1 | p. 7 |
| Rated Engine Speed (504BDT Engine) | 2200 RPM | p. 7 |
| Engine Idle Speed (504BDT Engine) | 725 to 775 RPM | p. 7 |
| Rocker Arm-to-Valve Clearance (Exhaust) (504BDT Engine) | 0.025 Inch (0.635 mm) | p. 7 |
| Rocker Arm-to-Valve Clearance (Intake) (504BDT Engine) | 0.015 Inch (0.381 mm) | p. 7 |
| Engine Oil Pressure (504BDT Engine) | 45 to 60 PSI (310 to 414 kPa) (3.1 to 4.14 bar) | p. 7 |
| Engine Oil Capacity (504BDT Engine, With Filters) | 28 U.S. Quarts (27 litres) | p. 7 |
| Pump Timing (4490, 4690) | 25 Degrees (BTC) Before Top Center | p. 8 |
| Fuel Tank Capacity (Each Tank) (4490, 4690) | 64 U.S. Gallons (242.3 litres) | p. 8 |
| Fuel Tank Capacity (Total) (4490, 4690) | 128 U.S. Gallons (484.6 Litres) | p. 8 |
| Cooling System Capacity (4490, 4690) | 48 U.S. Quarts (45.4 litres) | p. 8 |
| Thermostats Start to Open (4490, 4690) | Approximately 175°F (79 °C) | p. 8 |
| Thermostats Fully Open (4490, 4690) | 202°F (94°C) | p. 8 |
| Cylinder head bolt torque (with sequence) | 210 ft. lbs. (285 Nm)(28.5 kgm) | p. 242 |
| Relief valve RV2 in CV2 control valve | 270 PSI (1 862 kPa)(18.6 bar) | p. 974 |
Case 4490/4690 Common Problems This Manual Covers
Rear steering will not respond or holds only one mode on the selective steering system
Start with the testing procedure in the Steering section, then trace the circuit on the steering system electrical wiring diagram. Check the wheel sensors and control box connections before touching hydraulics. After that, move to the steering valve, priority valves and check valves covered in the same section.
Manual Section: Steering - Solid State Selective Steering, Electronic Steering, Testing p. 695Hitch lifts slowly or will not hold, and the remote hydraulics feel weak
Work through the Hydraulics testing procedures before you pull any parts, so you know whether it is the pump or a valve. Then check the oil filters, pump, flow divider and remote valves in order. The Electronic Hitch pages cover the control side if the hydraulics check out.
Manual Section: Hydraulics - Hitch System, Electronic Hitch, Testing p. 1344Engine runs hot under heavy drawbar load
Check the specs first. The thermostats should start to open near 175°F and be fully open at 202°F. The system takes a 10 PSI pressure cap and holds 48 quarts. The Engines section covers thermostat testing, cooling system service and turbocharger and air induction checks for a restricted or overworked engine.
Manual Section: Engines - Cooling, Turbocharger, Air Induction p. 103RPS-34 power shift is slow to engage or shifts harshly between gears
Check oil level and filters first, then work through the control valve and linkage pages in the Power Train section. Linkage adjustment fixes more of these than people expect. If pressures and linkage are right, the same section covers the transmission teardown, the four speed transmission and the drive shafts.
Manual Section: Power Train - RPS-34 Power Shift Transmission, Control Valve, Linkage p. 958Frequently Asked Questions
What is the valve lash on the 504BDT engine in the 4490 and 4690?
Set intake rocker arm-to-valve clearance at 0.015 inch (0.381 mm) and exhaust at 0.025 inch (0.635 mm). Firing order is 1-5-3-6-2-4, so you can work through the cylinders in order as you roll the engine over. The Engines section tune-up pages walk through the procedure. p. 7
What is the cylinder head bolt torque on the Case 4490/4690, and is there a tightening sequence?
The head bolts go to 210 ft. lbs. (285 Nm). The manual prints the tightening sequence with that figure, so you are not guessing at the pattern on a six-cylinder head. Follow the sequence in steps rather than taking any one bolt to full torque first. p. 242
Does it help with the electronic rear steering, or is it just hydraulics?
It covers both sides. There is a dedicated steering system electrical wiring diagram, plus testing procedures for the Solid State Selective Steering and the wheel sensors. This era has no fault code readout. Diagnosis is done with a meter and the test steps, and the manual gives you those. p. 728
What is different between the 4490 and the 4690 in this manual?
Both run the six-cylinder turbocharged 504BDT layout, but the 4690 adds an intercooler. The specs are listed separately for each model. Much of it matches: Robert Bosch Type PES pump timed at 25 degrees BTC, two 64-gallon fuel tanks and 48 quarts of coolant. p. 31
How much oil does the Case 4490/4690 engine take, and what oil pressure should I see?
The 504BDT holds 28 U.S. quarts with filters and 24 without. Oil pressure should read 45 to 60 PSI. Rated speed is 2200 RPM, with high idle at 2340 to 2380 and low idle at 725 to 775. That gives you a baseline before you chase a problem. p. 7
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