Fastener Tightening Specifications
| Application | Specification |
|---|
| Metric | English |
| Electronic Power Steering Control Module Bolt | 9 N.m | 80 lb in |
| Pitman Arm Nut (at the Relay Rod) | 62 N.m | 46 lb ft |
| Pitman Arm Nut (at the Steering Gear) | 250 N.m | 184 lb ft |
| Power Brake Booster Inlet Hose Fitting | 32 N.m | 24 lb ft |
| Power Steering Assist Motor Bolt | 13 N.m | 115 lb in |
| Power Steering Fluid Cooler Bolt | 9 N.m | 80 lb in |
| Power Steering Fluid Reservoir Stud | 58 N.m | 44 lb ft |
| Power Steering Gear Inlet Hose Fitting | 32 N.m | 24 lb ft |
| Power Steering Gear Inlet Hose Retaining Plate Bolt | 12 N.m | 106 lb in |
| Power Steering Pump Bolt | 50 N.m | 37 lb ft |
| Power Steering Pump Bracket Bolt | 50 N.m | 37 lb ft |
| Power Steering Pump Fitting | 75 N.m | 55 lb ft |
| Steering Gear Bolt (Non-Rack and Pinion) | 150 N.m | 110 lb ft |
| Steering Gear Bolt (Rack and Pinion Left Side) | 200 N.m | 148 lb ft |
| Steering Gear Bolt (Rack and Pinion Right Side) | 100 N.m | 74 lb ft |
| Steering Gear Cylinder Pipe Fitting | 34 N.m | 25 lb ft |
| Steering Gear Pitman Shaft and Housing Cover Bolt | 62 N.m | 46 lb ft |
| Steering Gear Pitman Shaft Lash Adjuster Lock Nut | 49 N.m | 36 lb ft |
| Steering Gear Rack Bearing Adjuster Plug Lock Nut | 68 N.m | 50 lb ft |
| Steering Linkage Inner Tie Rod (Hybrid) | 145 N.m | 107 lb ft |
| Steering Linkage Inner Tie Rod (Non-Hybrid) | 150 N.m | 111 lb ft |
| Steering Linkage Inner Tie Rod Nut | 75 N.m | 55 lb ft |
| Steering Linkage Outer Tie Rod Nut | 60 N.m | 44 lb ft |
| Steering Linkage Shield Bolt | 12 N.m | 111 lb in |
| Steering Shaft Coupling Bolt | 47 N.m | 45 lb ft |
| Stub Shaft Housing Bolt | 62 N.m | 46 lb ft |
Power Steering Pump Specifications
| Vehicle | Engine Size | High Flow (Liters per Minute) | High Flow (Gallons per Minute) | Pressure Relief (kPa) | Pressure Relief (PSI) |
|---|
| C/K 15/25 Utility | 4.8L 5.3L 6.0L 6.2L | 13.2/14.7 | 3.5/3.9 | 9825/10514 | 1425/1525 |
Scheme 1
Scheme 1: Power Steering Schematics
Scheme 2
Scheme 2: Power Steering Gear Disassembled View (680 Gear)
| Callout | Component Name |
|---|
| 1 | Stub Shaft Housing Bolt |
| 2 | Stub Shaft Housing |
| 3 | Stub Shaft Housing O-Ring |
| 4 | Stub Shaft Housing O-Ring |
| 5 | Steering Gear Pitman Shaft Housing Cover O-Ring |
| 6 | Steering Gear Pitman Shaft and Housing Cover |
| 7 | Steering Gear Pitman Shaft Lash Adjuster Nut |
| 8 | Steering Gear Pitman Shaft Housing Cover Bolt |
| 9 | Steering Gear Pitman Shaft Bearing |
| 10 | Steering Gear Pitman Shaft Seal |
| 11 | Steering Gear Pitman Shaft Washer |
| 12 | Steering Gear Pitman Shaft Seal Retaining Ring |
| 13 | Dust Seal |
| 14 | Pitman Arm Boot |
| 15 | Pitman Arm |
| 16 | Pitman Arm Washer |
| 17 | Pitman Arm Nut |
| 18 | Steering Gear Housing |
Scheme 3
Scheme 3: Power Steering Gear Disassembled View (Rack and Pinion)
| Callout | Component Name |
|---|
| 1 | Steering Linkage Outer Tie Rod |
| 2 | Steering Linkage Inner Tie Rod Nut |
| 3 | Steering Gear Boot Clamp |
| 4 | Steering Gear Boot |
| 5 | Steering Gear Boot Clamp |
| 6 | Steering Linkage Inner Tie Rod |
| 7 | Steering Gear Cylinder Pipe |
| 8 | Steering Gear Cylinder Pipe |
| 9 | Steering Gear Cylinder Pipe Seal |
| 10 | Steering Gear Cylinder Pipe Seal |
| 11 | Power Steering Gear Inlet Hose Retaining Plate |
| 12 | Power Steering Gear Inlet Hose Retaining Plate Bolt |
| 13 | Steering Gear |
| 14 | Steering Linkage Inner Tie Rod |
| 15 | Steering Gear Boot Clamp |
| 16 | Steering Gear Boot |
| 17 | Steering Gear Boot Clamp |
| 18 | Steering Linkage Inner Tie Rod Nut |
| 19 | Steering Linkage Outer Tie Rod |
Scheme 4
Scheme 4: Power Steering Gear Disassembled View (Two Mode Hybrid)
| Callout | Component Name |
|---|
| 1 | Steering Gear |
| 2 | Steering Linkage Inner Tie Rod |
| 3 | Steering Linkage Outer Tie Rod Nut |
| 4 | Steering Linkage Outer Tie Rod |
| 5 | Steering Linkage Inner Tie Rod Nut |
| 6 | Outer Steering Gear Boot Clamp |
| 7 | Steering Gear Boot |
| 8 | Inner Steering Gear Boot Clamp |
| 9 | Power Steering Assist Motor Bolt |
| 10 | Power Steering Assist Motor |
| 11 | Power Steering Assist Motor Seal |
| 12 | Power Steering Assist Motor Label |
| 13 | Power Steering Wiring Harness Extension Harness |
| 14 | Plastic Tie Strap |
| 15 | Power Steering Wiring Harness Extension Harness Retainer |
| 16 | Power Steering Wiring Harness Extension Harness Retainer |
Scheme 5
Scheme 5: Power Steering Pump Disassembled View
| Callout | Component Name |
|---|
| 1 | Power Steering Fluid Reservoir |
| 2 | Power Steering Fluid Reservoir Cap |
| 3 | Power Steering Fluid Reservoir Stud |
| 4 | Power Steering Fluid Reservoir Stud |
| 5 | Power Steering Pump Fitting |
| 6 | Power Steering Pump Fitting Seal |
| 7 | Power Steering Pump Flow Control Valve |
| 8 | Power Steering Pump Flow Control Valve Spring |
| 9 | Power Steering Pump Housing Seal |
| 10 | Power Steering Pump Housing Seals |
| 11 | Power Steering Fluid Reservoir Seal |
| 12 | Power Steering Pump |
| 13 | Power Steering Pump Shaft Seal |
| 14 | Power Steering Fluid Reservoir Magnet |
Torque Sensor
The power steering control module (PSCM) uses a combination of the torque sensor, motor rotational sensor, vehicle speed, and calculated system temperature inputs to determine the amount of assist needed. As the steering wheel is turned and torsional twist is applied to the steering shaft, the torque sensors input and output shaft sinusoidal voltage signals are processed by the PSCM to detect and calculate the steering torque. Additionally, the difference between the angle of the steering output and input shafts detected by the torque sensor and the sinusoidal voltage signals of the motor rotational sensor are both processed by the PSCM to detect and calculate the steering wheel angle.
