10. INSTALLATION OF STEERING SYSTEM INTO VEHICLE
To guarantee reliable operation of entire steering system, maximum
cleanliness is required during the installation of all the units included
in the system, as well as during installation of the lines. To prevent
operational trouble caused by foreign bodies or dirt in steering oil
circuit, the closing plugs on line connections of steering, oil pump,
power cylinder, valves, etc. should be removed only when the lines
are connected. Connecting lines and screw connections must be
carefully cleaned and deburred.
Ensure contact surfaces of fastening eyes of bearing bracket and steering free of paint and
Place steering gear into bearing bracket and screw down. Tighten screws at specified torque.
When fastening jacket tube and steering spindle, particularly with separately installed angular
gear units with flanged-on jacket tube avoid any distortions which may be caused during the
assembly of steering gear/bearing bracket by holding and mounting equipment on fire wall or
on instrument panel.
Distortions may cause bending torques, particularly in steering spindle, which may lead,
operation of steering gear.
A checkup with regard to correct installation of steering gear should be made as follows:
Check for Easy Operation of Steering Gear. Check for easy operation of steering
gear or separately installed angular gear unit in connection with bearing bracket, pitman
arm and drag link(s).
Checking Permitted Deformation of Steering Spindle.
Check up steering axle so that the steering can be easily turned manually.
Take off steering wheel and remove ball bearing cage or self-aligning bearing
from jacket tube of separately installed angular gear unit.
By turning steering spindle for min. 360º, check steering spindle for deformation.
Measurement can be performed with a dial gauge or a depth gauge. Always
take measurement from the same jacket tube peripheral point. The entire radial
run-out divided by 2 indicates the deformation of the steering spindle. The
maximum permissible deformation depends on length of jacket tube and on the
diameter of steering spindle. For this purpose refer to diagram Fig. 7, and
subparagraph 4) below for determining jacket tube length.
Checking for Permissible Distortion of Jacket Tube. For this purpose, mark
steering spindle at one point of circumference by a line. Then keep turning steering
spindle in steps (minimum four steps) and after each step always measure distance to
marked point on steering spindle from outside diameter of jacket tube by means of
depth gauge. Since the same steering spindle side is facing the measuring point
around jacket tube, the own run-out of the steering spindle is not included in the
measurement. The difference of the distance, max. dimension to min. dimension,
divided by 2, provides the deformation of the jacket tube. The max. possible
deformation depends on length and diameter of jacket tube, for this purpose refer to
diagram Fig. 7 as well as to explanations of jacket tube length.