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Delphi Power Recirculating-ball Steering Gears provide directional control of a vehicle. An open-centered, rotary-type valve provides smooth operation throughout the steering range while retaining excellent road feel. The integral rack piston converts hydraulic pressure to a rotation force that moves the steering linkage left or right. The steering system and hydraulic fluid also act as a cushion to help absorb road shocks. They are suitable for light-duty trucks, sport-utility vehicles, and vans.

 Models

• 670 Model: Up to 2800 pounds (1270 kg) front axle weight
• 680 Model: Up to 4500 pounds (2041 kg) front axle weight
• 684 Model: Up to 5400 pounds (2450 kg) front axle weight
  
  

Benefits

• Lightweight and highly durable
• Quiet operation 
• Available in three piston bore diameters to meet various vehicle front-axle weight requirements
• Long and short output shaft gear configurations available to provide flexibility of mounting and packaging for both right- and left-hand-drive vehicle applications
• Variable and straight ratio designs enable system designs for fewer turns corner to corner
• Custom valving profiles and center preload valve available to match steering system to vehicle handling requirements
• Low friction and quick response
• On-center turning torque of 0.9 to 1.2 N•m (versus industry average of 1.8 N•m)
• Variety of hose port geometries
• Multiple input shaft configuration
• Superior warranty and durability performance
   

Specifications

• Rack piston diameter: 69.9 mm, 79.4 mm, and  83.9mm
• Operating temperatures:
• Continuous: 135°C (275°F)
• Intermittent: 150°C (302°F)