Adjusting the Worm and Sector Type of Steering Gear.—An eccentric bushing is provided to take up play between the worm and sector. This adjustment is made by driving the notched cone to the right to take out play, and to the left to slack up or take out stiffness.
[Fig. 136] shows the worm and nut type of steering gear. This type of steering gear as well as the worm and sector, is called the irreversible steering gear, which means that no reverse action takes place, or is present at the steering wheel, should one of the front wheels encounter a stone in the road, or drop into a deep rut. The worm and nut type consists of a double armed and pivoted steering arm. Each arm carries a ball. The drag link socket is attached to the ball on the lower arm while the ball on the upper and shorter arm fits in a socket in the nut through which the worm on the steering shaft passes. This nut is threaded to fit the worm which passes through it and moves up and down on the worm according to the direction which the steering wheel is turned. The housing of this type of steering must be well packed with a light cup or graphic grease to prevent the screw or worm from binding, which will make steering difficult and tiresome.
| Steering Column | |
| Worm Screw | |
| Nut | |
| Pivot | |
| Frame | |
| Drag Link | |
| St. Arm |
Fig. 136. Worm and Nut Type Steering Gear
Steering Shaft
Ball
Gear
Housing