Opel 1900 1973, Service Manual

Page: 194 / 625

STEERING GEAR ASSEMBLY
27
STEERING GEAR ASSEMBLY
CONTENTS
Subject
DESCRIPTION AND OPERATION:
Description and Operation of Steering Gear . . . . . . . . . . . .
DIAGNOSIS: (Not Applicable)
MAINTENANCE AND ADJUSTMENTS:
Adjustment of Steering Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAJOR REPAIR:
Removal and Installation of Steering Gear
Assembly and Tie Rods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly and Reassembly of Steering Gear
Assembly With Tie Rods
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS:
Tightening Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page No.
DESCRIPTION AND OPERATION
DESCRIPTION AND OPERATION OF
STEERING GEAR ASSEMBLY
The Opel 1900 Manta and GT steering gear is the
rack and pinion type. The steering gear pinion shaft,
connected to the lower end of the steering column,
moves the rack to the left or right thereby transmit-
ting the turning motion of the steering wheel to the
tie rods and steering arms.
The steering gear housing is held to the cross mem-
ber
by rubber bushings and clamps. The bushings
serve to prevent driving noises and vibrations from
being transmitted into the passenger compartment.
A pinion shaft is seated in the upper portion of the
steering gear housing and is supported by a needle
bearing in the upper housing, and a bushing in the
lower housing. The pinion is not adjustable.
A rubber “0” ring seal is provided for sealing needle
bearing, and a second “0” ring for sealing pinion
bushing. The rack and pinion shaft are held in mesh
by a thrust spring and shell. See Figure
The pressure of the thrust spring may be varied by
means of an adjusting screw. The spring forces the
sintered bronze shell against the rack, which in turn
is held against the pinion shaft. Backlash in the steer-
ing gear is avoided, and road shocks are effectively
absorbed.
The rack is seated in the long neck of the steering
gear housing in a self-lubricating sintered metal
bushing. It is laterally guided by the sintered bronze
shell in the adjusting screw opening, and in the short
gear housing neck by the rack guide bushing. See
Figure
MAINTENANCE ADJUSTMENTS
ADJUSTMENTS OF STEERING GEAR
Adjustment of Steering Gear
Adjustment of the steering gear assembly is accom-
plished by turning the adjusting screw in or out. See
Figure
Positioning of the adjusting screw exerts a pressure
on the rack, thereby varying the backlash between
the pinion and rack.
1. Set steering gear to high point by positioning front
wheels straight ahead with steering wheel centered.
Flexible coupling bolt hole will be positioned hori-
zontal (or parallel) to the rack.
2. Thread adjusting screw into steering gear housing