4 Wheel Steering
Introduction To Power Steering Systems - Night School
Power Steering Systems An Introduction To Classic Truck Steering Systems, Part 2
From the February, 2010 issue of Classic Trucks
By Moses Ludel
| The Saginaw rotary valve steering... read full captionThe Saginaw rotary valve steering gear is an integral, streamlined design introduced in 1959. By the end of the '60s, all GM cars and light trucks offered this gear. Ford, I-H, Dodge, and Jeep outsourced rotary valve gears as well. Saginaw's recirculating ball-and-rack piston engineering has become a worldwide standard.By 1951, many American vehicles required power steering. Gemmer's Hydraguide system, the first power steering system used on an American car, was Chrysler's answer to the massive front end weight created by the new hemi V-8. Other manufacturers quickly followed.Two power steering designs emerged. Linkage assist steering and the integral power steering gear-each use a constant flow, positive displacement hydraulic pump. The pump, belt-driven by the engine, pressurizes and circulates power steering fluid.Linkage assist steering consists of a hydraulic control valve attached to one end of the drag link or centerlink. The valve receives input signals from the steering wheel and steering gear. Left or right steering causes the valve to react, opening ports to move hydraulic fluid into a hydraulic ram. The ram attaches to the steering linkage. Fluid directed to one side of the ram's piston or the other determines which direction the power assist will apply.This apparatus is a Saginaw... read full captionThis apparatus is a Saginaw offset integral steering gear. Introduced in 1952 GM luxury models, the design preceded Saginaw's inline gear. Like the Gemmer Hydraguide, the offset was essentially a manual steering gear with a parallel power assist cylinder and rack drive. The unit was too large for light truck, ladder frame use.The linkage assist system is the easiest to adapt. Some truck manufacturers
Power Steering Systems An Introduction To Classic Truck Steering Systems, Part 2
From the February, 2010 issue of Classic Trucks
By Moses Ludel
| The Saginaw rotary valve steering... read full captionThe Saginaw rotary valve steering gear is an integral, streamlined design introduced in 1959. By the end of the '60s, all GM cars and light trucks offered this gear. Ford, I-H, Dodge, and Jeep outsourced rotary valve gears as well. Saginaw's recirculating ball-and-rack piston engineering has become a worldwide standard.By 1951, many American vehicles required power steering. Gemmer's Hydraguide system, the first power steering system used on an American car, was Chrysler's answer to the massive front end weight created by the new hemi V-8. Other manufacturers quickly followed.Two power steering designs emerged. Linkage assist steering and the integral power steering gear-each use a constant flow, positive displacement hydraulic pump. The pump, belt-driven by the engine, pressurizes and circulates power steering fluid.Linkage assist steering consists of a hydraulic control valve attached to one end of the drag link or centerlink. The valve receives input signals from the steering wheel and steering gear. Left or right steering causes the valve to react, opening ports to move hydraulic fluid into a hydraulic ram. The ram attaches to the steering linkage. Fluid directed to one side of the ram's piston or the other determines which direction the power assist will apply.This apparatus is a Saginaw... read full captionThis apparatus is a Saginaw offset integral steering gear. Introduced in 1952 GM luxury models, the design preceded Saginaw's inline gear. Like the Gemmer Hydraguide, the offset was essentially a manual steering gear with a parallel power assist cylinder and rack drive. The unit was too large for light truck, ladder frame use.The linkage assist system is the easiest to adapt. Some truck manufacturers