Chrysler C-67, C-68, C-70, C-69 Service Manual
386—STEERING
CHRYSLER SERVICE MANUAL
MANUAL STEERING
DATA
MODELS
King Pin Diameter
King Pin Bushings (Manual Steering) Type
Upper
Lower
King Pin Bushings (Power Steering) Type
Upper
Lower
Dimensions of Lower Bushings
Inside Diameter
Outside Diameter
Length
Ream After Installation
AND
SPECIFICATIONS
C-67, C-68, C-69, C-70
Needle Type Bearing
Floating Bushing
Floating Bushing
1.195 to 1.205 in.
.7960 to .7975 in.
.7953 in.
Bushing
.787 to .789 in.
.823
to .825 in.
COAXIAL POWER STEERING
MODELS
Fluid Capacity of Hydraulic System
Fluid Capacity of Worm Housing
Type of Fluid
Maximum Pump Pressure
Maximum Fluid Flow at
Maximum Pump Rotor Clearances:
Between Rotor Lobes
Between Outer Rotor and Bushing
3,000
R.P.M
C-67, C-68, C-69, C-70
2qts.
lpt.
Automatic Transmission Fluid,
Type A
750 to 800 psi.
2 gal. (Minimum)
.008 in.
.006 in.
CHRYSLER SERVICE MANUAL
COAXIAL POWER STEERING (Cont'd)
End Clearance (Between Rotors and
STEERING—387
Face of Body)
Flow Control Valve Spring
Free Length
Working Length
Force at Working Length
Pressure Relief Valve Spring
Free Length
Working Length
Force at Working Length,
Front End Alignment
Steering Gear Ratio
Piston Rod Snap Ring Gap
(Upper and Lower) ...
.001
to .002 in.
2.13 in.
1.20 in.
14 lbs. ± lVo lbs.
1.51 in.
1.18 in.
30 to 33 lbs.
16.2:1
2
%4 in.
Tool Number
C-143
C-328
C-611
C-3428
C-619
C-630
SPECIAL TOOLS
MANUAL STEERING GEAR
Tool Name
Puller-—Steering Arm
Bushing—King Pin Remover
Bushing—Eccentric Adjusting
Puller—Steering Wheel
Bushing—Eccentric Adjusting
Reamer—Pilot Bushing
388—STEERING
CHRYSLER SERVICE MANUAL
COAXIAL POWER STEERING GEAR
Tool Number Tool Name
C-760 Pliers—Gear Snap Ring—Straight Type
C-3102 Gauge—Hydraulic Pump and Gear Checking
C-3106 Pliers—Gear Snap Ring—Right Angle
C-3107 Wrench—Adjustable Spanner
C-3108 Studs—(Pr.) Power Cylinder
C-
3109 Spacer—Aligning Unit In Chassis
C-3112 Puller—Steering Gear Tube Coupling Adapters for C-293 Puller (C-3145
Covers C-3112 Parts and C-293 Parts Required To Pull Coupling)
C-3113 Driver—Steering Gear Shaft Outer Bearing
C-3114 Driver—Steering Gear Shaft Inner Bearing
C-3116 Pilots—(Pr.)Reservoir Installing
C-3117 Plug—Oil Pump Return Hole (Tapered) (Small)
C-3128 Pliers—Pump Shaft Rear Bearing Ring
C-3129 Driver—Pump Oil Seal and Bearing
C-3130 Thimble—Protector—Pump Oil Seal
C-3136 Sleeve—Shaft Oil Seal Installing
C-3137 Remover—Shaft Oil Seal
C-3141 Driver—Valve Block Adjusting Pin Roller
C-3142 Driver—Steering Gear Shaft Inner Seal
C-3143 Driver—Steering Tube Oil Seal In Valve Body Cap
C-3189 Plug—Oil Pump Return Hole (Tapered) (Large)
C-485,
C-524 or
C-612 Puller—Steering Wheel
C-685 or C-3380 Wrench—Inch-Pound Torque
C-3005..
Wrench—Foot-Pound Torque
SP-2623 Puller Screw—For Use With C-143 Puller (Previously Released)
C-3185 Remover—Pump Shaft Bushings and Seal
C-3211 Hose—High Pressure P/S Test
C-3214 Puller—Main Bearing
CHRYSLER SERVICE MANUAL
STEERING—389
COAXIAL POWER STEERING GEAR (Cont'd)
Tool Number Tool Name
C-3227 Wrench—Flange Holding
C-3228 Thimble—Shaft Oil Seal Protecting
C-3229 Pliers
C-3230 Driver—Shaft Oil Seal Installing
C-3233 Driver—Shaft Bushing Installing
C-3234 Adapter—For using C-3214 Puller
C-3250 Pliers—Hose Clamp
C-3251 Driver—Main Bearing Installing
C-3309 Gauge—Oil Pump, pressure checking
C-3317 Driver—Worm Housing Oil Seal
C-3318 Hose—Low Pressure P/S Test W/adapters
C-3319 Nut—Worm Shaft Holding
C-3320 Wrench—Worm Shaft Bearing Adjusting Nut
C-3321 Wrench—Worm Connector Holding
C-3322 Remover and Installer Worm Housing Bearing Cups
C-3323 Fixture—Gear Assembly Holding
C-3328 Spanner—Upper Piston Rod Nut
C-3329 Thimble—Valve Control Spacer Seal Installing
C-3331 Driver—Housing Head and Gear Housing Seal
C-3333 Driver—Remove and Install Gear Shaft Bearing
C-3344—SP-2604 Installer—Piston and Ring Assembly
C-3350 Remover and Installer—Gear Shaft Oil Seal
C-3437 Protector—Lower Piston Rod Seal
C-3392 Wedge—Coupling Removing—(Not Required If C-3112 Is Available)
C-3398 Remover and Installer—Gear Shift Rod Bushings
C-3399 Tool—Shifter Dial Bulb Removing and Installing
C-3401 Thimble—Gearshift Adjusting Screw "0" Ring Installing
C-3469 Flange—Upper Housing—Used For Pretesting for Hydraulic Leaks
390—STEERING CHRYSLER SERVICE MANUAL
TIGHTENING REFERENCE
MANUAL STEERING
Foot-Pounds
Steering Gear to Frame Bolt 50
Steering Gear Arm (Pitman) Lock Bolt Nut. 80
Steering Knuckle Tie Rod Clamp Bolt 15
Steering Gear Mounting Bracket Bolts 50
Steering Wheel Nut 40
Steering Knuckle Tie Rod End Ball Nut 75
Intermediate Steering Arm Pin Nut 50
POWER STEERING GEAR ASSEMBLY
Foot-Pounds
Pump Body to Cover Bolts 30-35
Pump Reservoir to Pump Body Bolts 12-17
Pump Mounting Bolts 18-23
Pump Reservoir Mounting Stud 30-35
Steering Knuckle Arm Nuts (Brake Anchor Nuts) 55-75
Steering Gear Arm to Shaft Nut 100-125
Steering Arm to Transverse Link Nut 50-55
Steering Gear Assembly Mounting to Frame 65-70
Steering Wheel to Steering Shaft Nut 35-40
Jacket to Instrument Panel Screws 15-20
Tie Rod Clamp Bolts 10-15
CHRYSLER SERVICE MANUAL-
STEERING—391
POWER STEERING GEAR ASSEMBLY (Cont'd)
Foot-Pounds
Tie Rod to Steering Knuckle Arm Nuts 45-75
Pump Coupling Attaching Screw 15-20
Pump Flow Control and Relief
Pump Coupling Flange Attaching Screw 10-12
Upper Piston Rod Nut 25-30
Ball Guide Clamp Screws 10-12
Worm Housing to Gear Housing Screws 25-30
Gear Shaft Adjusting Screw Lock Nut 35-40
Valve
Adapter (Retaining) 45-50
RESERVOIR
Thread Size Foot-Pounds
Reservoir Cover Bolt %6 x 24 8
Relief Valve Assembly Cap 1x8 8
Hose Connector Inlet % x 18 30
PUMP
Thread Size Foot-Pounds
Pump Assembly Bolt %6 x 18 20
Hose Connector Outlet % x 18 30
By-Pass Plug % x 16 50
Relief Valve Plug 1 x 14 50
Flow Divider Valve Plug 1% x 12 50
94 e Drain Tube Nut % x 24 *y2 to % Turn
or 6 to 10
* The number of turns specified is after initial finger tightening.
392—STEERING
CHRYSLER SERVICE MANUAL
WASHER
LOCKWASHER
NUT
OIL
WASHER
WASHER
SEAL
GROMMET
LEVER
KNOB
JACKET
INSULATOR
GROMMET
SWITCH
BRACKET
OILSEM
BUSHINGS<^T%
CAGE
AND
TUBE
AND
CAGE
AND
OIL
SHIMS
COVER
SCREW
NUT
WORM
ROLLERS
SEAL
'^J^\\
ROLLERS
CUP
\ *
NUT
54x677
A
Fig.
1—Typical Steering Gear (Exploded View)
CHRYSLER SERVICE MANUAL
STEERING—393
Section
STEERING
(SEE FIG.
1.
LINKAGE
The symmetrical idler arm type
shown
in
Figure 2,
is
used on
ter link relays the motion from the Pitman arm
to an idler arm at its opposite end. The idler arm
is mounted
on a
bracket attached
Two equal length tie rods connect from the center relay link to the steering knuckle arms. Both
tie rods
are
threaded
for
adjustment.
2.
STEERING GEAR (THREE-TOOTH ROLLER
AND WORM) (Mechanical)
A three-tooth roller
is
mounted
bearings on a steel cross-shaft inserted through
the steering gear shaft.
of
all
models. A cen-
to the
proper
on
steering,
as
frame.
toe
aligning
needle roller
X
1)
The worm
and
is
bearings. The worm bearing pre-load is adjusted
by means
and housing end cover. The steering gear shaft
rotates
steering gear housing.
on
the
the steering wheel
the steering gear shaft
Pitman arm, which
shaft and held
Backlash between the steering gear shaft roller tooth and
justing screw that is threaded through the shaft
and roller cover. The base end
screw
is
steering gear shaft. Correct backlash
is
integral with
supported
of
in
two bronze bushings pressed into
shaft
engaged
at
each
shims placed between
is
meshed with
is
turned,
is
splined
in
place with
the
worm
in a
the
steering tube
end by
tapered roller
the
The
three-tooth roller
the
worm. When
the
worm rotates
and
roller, moving
to the
a nut.
is
controlled
of
the adjusting
slot
in the end of the
housing
the
the
end
of the
by an ad-
can be
STEERING KNUCKLE
ARM-RIGHT
TIE
ROD
END-OUTER
TIE
ROD
ENDS-INNER
CENTER LINK
IDLER
ARM
STEERING GEAR
STEERING KNUCKLE
ARM-LEFT
STEERING GEAR
ARM
55x5
Fig.
2—Idler Arm Type Steering Linkage
394—STEERING
CHRYSLER SERVICE MANUAL
obtained by turning the adjusting screw in or
out, as required.
The steering wheel and Pitman arm are
splined to the steering tube and steering gear
shaft, respectively. Both the steering wheel and
the Pitman arm have master serrations to in-
sure correct installation.
The high point is the point of least clearance
between the worm and roller and is at the midpoint of the worm and roller travel.
An oil seal is installed in the bore of the
steering gear housing at the outer end of the
shaft to prevent oil leakage and to keep foreign
material from entering the steering unit.
3.
REMOVAL OF STEERING WHEEL
ASSEMBLY
Disconnect battery and center the steering
wheel in the straight-ahead position. Press down
on the horn blowing ring ornament and turn
counter-clockwise. Lift out ornament retaining
spring and pad. Disconnect horn wire from terminal on travel plate and insulator assembly.
Remove bushing, travel plate, horn blowing contact ring spring, and triangular ground plate.
Curl and push horn wire into the steering gear
tube to make room for steering wheel puller
pilot. Remove the steering wheel nut. Attach
puller and remove steering wheel.
Drain lubricant from the steering gear housing. Mount the gear assembly in a suitable bench
vise,
holding the assembly by the housing to
chassis mounting flange, with the steering column in the horizontal position. Remove the shaft
cover attaching cap screws, cover, gasket and
steering gear shaft, and roller tooth assembly.
Loosen the column jacket clamp bolt, pry
open clamp and remove column jacket from
steering housing. Remove steering worm, lower
oil seal housing cover bolts, cover and shims.
Pull steering tube and worm assembly bearing
cups and bearing cages out of the lower end of
steering housing.
Clean the steering gear housing shaft, bearings and other parts thoroughly with a suitable
cleaning solvent. Inspect roller tooth shaft, shaft
serrations, bearings, bearing cups, oil seals,
worm and tube for wear, nicks and flat spots.
Replace with new parts as necessary.
Remove roller tooth assembly shaft cover
adjusting screw nut and locking plate. Check
adjusting screw threads in cover and on the
adjusting screw. Replace if necessary.
6. ASSEMBLY OF STEERING GEAR
(Unit Removed From Car)
4.
REMOVAL OF STEERING GEAR
ASSEMBLY
It is not necessary to remove the complete steering column and mast assembly from the car for
servicing the gear chuck and worm shaft. To
remove the gear chuck and worm shaft assembly proceed as follows. Disconnect the battery,
press down on the horn ring ornament while rotating it, and remove ornament. Remove steering column worm shaft nut. Pull steering wheel
with puller. Loosen jacket bracket bolts at instrument panel. Remove dust pad retaining
screws. Raise front of car and remove steering
gear (Pitman) arm from gear shaft. Loosen
jacket to gear chuck clamp bolt. Remove gear
chuck to frame attaching bolts and work gear
chuck and shaft assembly out of jacket. Remove
assembly from lower side of car.
5.
DISASSEMBLY OF STEERING GEAR
(Unit Removed From Car)
To disassemble the Manual Steering Gear As-
sembly, proceed as follows:
NOTE
When the steering gear assembly is disassembled,
it is always advisable to install new seals
and gaskets to insure against oil leaks.
If either of the worm thrust tapered roller
bearings have become damaged, it is advisable
to replace both bearings. After thoroughly
cleaning all parts, assemble the parts without
any lubrication. Lubrication should be done
after the adjustments have been completed. If
bushings or needle bearings have been removed,
press new bushings or needle bearings into
place. Use new oil seals.
Insert the worm and tube into the housing
with bearings and cups in the proper order, as
shown in Figure 2. Install the shims and lower
housing cover, making sure that bearings are
seated in cups before tightening
the cover screws evenly, turning the worm tube
at intervale to be sure no bind occurs. Final
screws.
Tighten
CHRYSLER SERVICE MANUAL
STEERING—395
tightening of the screws should cause the end
play to just disappear with the torque required
to rotate the wheel from % to % of a pound,
when measured with the pull applied at rim of
wheel. If a bind in the rotation of the tube occurs
when the cover screws are fully tightened, it
will be necessary to add shim thickness until
bind just disappears. If end play is present after
final tightening, less shim thickness is required.
Shims are available in .003, .006, .011 and .025
inch. By using a micrometer to measure shims, #
the proper combination can be chosen.
Refer to Figure 2 and 3. Install the roller
shaft bearing in the housing. Before installing
the cover, turn.the adjusting screw all the way
out (counter-clockwise). When the roller shaft
assembly is completely installed, with the exception of the Pitman arm, adjust as follows:
Place the steering wheel on the tube and rotate the wheel in either direction to the end of
its travel. Then, rotate in the opposite direction
to the end of travel while counting the turns.
Rotate the wheel back 1/2 the full number of
turns.
This is the center of travel (mid-travel or
high point). Turn the adjusting screw in (clockwise) until all end play in the roller shaft disappears. Roll the wheel back and forth several
times.
There should be no bind. Rotate the wheel
to one of the ends of travel and apply a spring
scale or torque wrench. With the pull applied
at the rim of the wheel, the tension should measure from 1 to 2 pounds. Rotate the wheel back
to the center and on past the center position.
The greatest tension should be felt as the wheel
is rotated through the center position. Adjust
the bearing load by turning adjusting screw in
or out of the cover, as required. Install lock
plate, nut, and Pitman arm. Fill the gear housing with SAE 90 Fluid Gear Lubricant. Rotate
the wheel back and forth through its full travel
several times to be sure all parts are fully lu-
bricated and check for leaks.
7.
ADJUSTING WORM BEARINGS (In Car)
Rotate steering wheel to extreme right or left
and turn back % turn. Press a finger at joint
between bottom of steering wheel hub and shell.
Have another mechanic shake the front wheels
hard sideways, but not enough to turn steering
wheel. Any end play in worm bearings can be
felt at steering wheel hub. There should be no
end play at the
fused with clearance between the roller and
worm. If any excessive end play exists, remove
the steering gear arm, drain the housing, and
disconnect the horn wire at connector between
steering gear and horn.
Remove cap
cover at bottom of steering gear housing. Remove shims of sufficient thickness between this
cover and housing to eliminate the end play in
worm, but not enough to cause binding when
cover is bolted tightly in place. Turn steering
wheel from extreme right to left. If any
ness exists, too many shims have been removed,
or the steering gear assembly is misaligned on
car.
8. INSTALLATION AND ALIGNMENT OF
STEERING GEAR ASSEMBLY
a. Installation
Where gear chuck and worm shaft assembly has
been removed for service, install as follows.
Raise front of car, insert worm shaft into jacket
and move gear chuck assembly up into position.
It may be necessary for an assistant to guide
the top of the worm shaft through the upper
jacket alignment bearing. Install gear chuck to
bracket attaching bolts and tighten forward
bolt to a snug fit. Lower car to floor. Center the
jacket in the instrument panel and tighten
bracket bolts. Install and tighten dust pad retaining screws. Install steering wheel horn ring
and ornament. Raise front of car. Tighten attaching bolts. Install steering (Pitman) arm
and tighten nut.
b.
Alignment (All Models)
A slight bind of the steering gear is sometimes
caused by shifting of body due to loosened bolts.
If this condition occurs, body bolts should first
be tightened. Then, the steering gear should be
loosened at frame, frame bracket and dash
bracket, and allowed to seek its natural position.
Position the center of steering column in cen-
ter of instrument cluster. If this cannot be ac-
complished by the shifting of the frame bracket,
as provided for by the oversize and elongated
mounting screw holes, it will be necessary to
add metal washer shims between the frame and
frame bracket. Tighten dash bracket and tighten steering gear to frame.
hub.
End play should not be con-
screws which hold grease retainer
stiff-
396—STEERING
CHRYSLER SERVICE MANUAL
NOTE
Be sure the body to frame bolts are tight and
the spacers are in place. With the body bolts
tight, loosen the gear housing mounting bolts
to allow the steering gear to move in relation
to the frame. Tighten the mounting bolts to
50 foot-pounds torque. Loosen the steering col-
umn bolts that hold column to instrument panel
to determine if the column shifts its position in
relation to the support.
9. ADJUSTMENT OF ROLLER TOOTH AND
WORM (In Car)
End play of steering arm shaft and mesh of
roller tooth with steering worm may be adjusted
as follows:
Remove steering gear (Pitman) arm from
shaft and install another arm for making adjustments. Turn steering wheel to mid-position.
This is obtained by turning wheel to extreme
right or left, and then turning it to opposite extreme, counting number of turns required. Turn
steering wheel back 1/2 the number of turns required for turning it from one extreme to the
other. With steering wheel in mid-position,
attempt to move steering gear arm back and
forth to determine whether or not there is any
backlash. There should be no backlash. But if
backlash exists, the roller tooth and worm
should be adjusted.
Remove roller tooth shaft adjustment screw
lock nut. Slide off lock plate far enough to clear
lock boss on roller tooth shaft cover. Tighten
roller tooth shaft adjusting screw (Fig. 3)
enough to eliminate free play between roller
tooth shaft and worm; but, it must not bind.
Slide lock plate in position against roller tooth
shaft cover and lock it. Install and tighten
roller tooth shaft adjustment screw lock nut.
Check steering gear operation again for binding
and backlash. Correct any inaccuracies in adjustments. Install steering gear arm with tie
rods.
WORM BEARING ADJUSTING SHIMS
ADJUSTING SCREW
ADJUSTING SCREW
LOCK PLATE
-LOCK PLATE
Fig.
3—Steering Gear Adjustments
NUT
54x46
the idler assembly. Screw the new idler arm
into the bracket until the shoulder on the arm
contacts the face of the bracket. Turn arm out
of bracket one complete turn. It may be necessary to rotate the arm slightly to line up the
bracket for installing attaching bolts.
11.
REMOVAL AND INSTALLATION OF
STEERING KNUCKLE TIE RODS
Remove cotter pin and loosen nut on upper end
of the rod ball. With Tool C-3394, remove tie
rod from steering arm (Fig. 4). Tie rod balls
are not removable from tie rod ends. If replace-
ment of either is necessary, the complete tie rod
end and ball assembly should be replaced. Loosen
clamping bolt nut on the tie rod end. Unscrew
tie rod end assembly from tie rod.
When assembling tie rod ends to tube body,
be sure to thread the ends evenly on tube body
to the nominal length listed in Data and Specifications. This is necessary to obtain proper positioning of the steering wheel with respect to the
straight-ahead position of the front wheels.
Care must be taken to make certain the clamping bolts are beneath the tie rods to prevent
interference on turns.
10.
SERVICING IDLER ARM
Service of the idler arm is restricted to replacement and adjustment. When replacing the idler
arm, disconnect the relay rod (center link) from
the idler arm. Remove the bracket attaching
screws from the bracket and frame and remove
12.
ADJUSTMENT OF FRONT WHEEL
BEARINGS
After removing the hub cap and the grease cap,
remove the cotter pin in the bearing adjusting
nut at the outer end of the steering knuckle
CHRYSLER SERVICE MANUAL
STEERING—397
STEERING KNUCKLE
Fig.
4—Removing Tie Rod From Steering Knuckle Arm
(Tool C-3394)
(wheel spindle). Turn bearing adjusting
(Fig.
5)
hand tight. Turn adjusting
one slot. Turn
cotter
pin
new cotter pin.
be
in
good condition and the cotter pin properly
the nut
hole centers over hole
The
bearing
ARM
nut
nut
back
back until slot nearest
and
nut
threads must
install
a
installed and spread. Always use new cotter pins.
13.
RECONDITIONING FRONT WHEEL HUB
AND DRUM ASSEMBLY
Raise front
end of car
until wheel
is off
floor.
Remove hub cap. Remove wheel hub bolts. Bolts
on left wheels have left-hand threads and those
on right wheels have right-hand threads.
move wheel
special Tool C-438,
driver
move threaded type
hub.
Remove cotter
wheel bearing adjusting
bearing and pull hub
not necessary
is
to
be removed from steering knuckle spindle.
Wheel and hub may
unit. Inspect
Before installing front wheel
hub
grease
and
tapping with a light hammer.
cup
or by
by
unscrewing
(snap type) with
prying with a screw
pin and
nut.
off
steering knuckle.
to
remove wheel from hub
be
removed
oil
seal
and
replace
unscrew front
Remove outer
as a
if
necessary.
hub and
ing assembly, remove lubricant from
and bearings and make sure parts
condition. Install inner
so there
ders.
is no
clearance between the hub shoul-
Pack bearings with Short Fiber Wheel
and
outer bearing cups
are in
Re-
Re-
cap
from
It is
if
hub
complete
bear-
the hub
good
Bearing Lubricant (Medium). When installing
the
oil
seals, make certain that
the
seal flange
bottoms on the bearing cup.
14.
REMOVAL AND INSTALLATION
OF
STEERING KNUCKLE KING PINS AND
BUSHINGS
NOTE
Should servicing
of
the steering knuckle be nec-
1—Bearing
2—Bearing thrust washer
3—Outer bearing cup
4—Hub
nut
Fig.
5—Front Wheel Bearings
5—Inner bearing cone and rollers
6-Hub dust seal
7—Hub cap
8—Grease cap
°—Bearing nut cotter pin
10—Outer bearing cone and rollers
11—Steering knuckle
12—Inner bearing cup
398—STEERING CHRYSLER SERVICE MANUAL
Fig.
6—Removing Brake Support
Fig.
7—Removing King Pin Bushing or Bearing
essary, time can
ing knuckle
Remove steering knuckle and brake support
an
assembly.
If
it
is
done
support. Remove brake hose connections,
leave brake support
move unit as an assembly with steering knuckle
after king pin is
ings,
seals,
knuckle and support assembly.
be
saved by removing the steer-
arm
from
the
steering knuckle.
as
Make necessary
in
this manner, eliminate removing
repairs
on
a bench.
but
on
removed.
steering knuckle.
Always use new bush-
Re-
and pins ivhen servicing the steering
1—King
pin bushing
at top and oil hole
hole
in
steering knuckle. Stationary type bushings (Fig.
move
8)
the
upper needle bearing. Install reamer
or
in
should
bearing 2—Tool C-328
bearing lined
be
line-reamed. First
up
with
oil
re-
pilot bushing Tool C-631 and reamer Tool C-379.
When installing lower
bushing (Fig.
9),
to the top. Both types
and
upper floating type
place open end
of
lower bushings should
of oil
groove
Remove wheel and hub assembly. Block brake
pedal
so it
cannot
and bolts that fasten brake support
knuckle. Remove steering knuckle
steering knuckle. Remove brake hose
nections and lift
be
depressed. Remove nuts
to
arm
and
off
brake support (Fig. 6). Do
steering
from
con-
not allow brake support and shoe assembly to be
supported
by
flexible brake hose. Remove king
pin locking pin.
Drive a punch into upper steering knuckle
welch plug and
Drive king
welch plug. A soft brass drift should
when driving against top
steering knuckle upper needle bearing
ing
by
pulling
special
tool,
ing knuckle lower bushing.
stationary type, use special tool to remove
The upper needle bearing must
from
top of
pry it out of
pin
downward, forcing
it
toward center knuckle, using
as shown in Figure
steering knuckle.
out
be
of
king pin. Remove
or
7.
Remove steer-
If
bushing
is of
lower
used
bush-
the
it.
be
installed
steering knuckle, with trade mark
49x607
Fig.
8—Bearing and Stationary Type Bushing
Installed
1—Bearing identification mark 3—Lubricant holes
2—Bushing identification line
or
notch A—3/32 inch
B-l/16inch
CHRYSLER SERVICE MANUAL
STEERING—399
STAKE IN PLACE
AS SHOWN
STAKE SECURELY
4 PLACES AS
SHOWN BOTH
ENDS
Fig.
9—Bearing and Floating Type Bushing Installed
1—Bearing identification mark
2—Lubricant holes
3—Floating type bushing
A-3/16inch
be installed with oil hole in bearing lined up
with oil hole in steering knuckle. On cars
equipped with Power Steering, the king pin
bushings should be installed with the open end
of the oil groove leading towards the "O" seal
rings.
After installing the steering knuckle, make
sure it is free in the support. Binding at this
point may cause sensitive steering and car wander. There should be .006 to .008 inch clearance
between the steering knuckle and the knuckle
support. This clearance can be adjusted by the
49x701
Fig.
10—Welch Plug and King Pin Lock Pin Installed
use of shims between the steering knuckle and
the thrust bearings.
When installing a welch plug, it is necessary
to stake it after it is properly in place, as shown
in Figure 10.
Before installing hub and drum assembly,
perform Major Brake Adjustment, described
in Section III, Brakes, as applied to cars
equipped with Manual Steering. After installing hub, drum and wheel assembly, check king
pin inclination, caster, camber, and toe-in or
toe-out, as outlined in Front Wheel Alignment
in this Section. Adjust brakes.
COAXIAL POWER STEERING
15.
DESCRIPTION (Fig. 11)
The Coaxial Power Steering Unit incorporates two basic gear mechanisms, a worm and
worm connector and a rack and sector gear.
The worm and worm connector act in a man-
ner similar to a bolt and nut assembly, rotation
of the worm causes linear (axial) motion of the
worm connector. Fastened to the worm connector, in succession, are an upper piston rod, a
piston, and a lower piston rod, all concentric to
the steering column axis. (This arrangement
provides a means for adding power assistance
to the system.)
400—STEERING
CHRYSLER SERVICE MANUAL
CHRYSLER SERVICE MANUAL
STEERING—401
FLOW CONTROL VALVE (CLOSED)
PRESSURE RELIEF
VALVE
HIGH PRESSURE - LOW FLOW
FLOW CONTROL VALVE (OPEN)
PRESSURE RELIEF
VALVE (CLOSED)
A rack, machined
lower piston
rod,
in
the lower portion
of
the
meshes with a sector gear.
This combination produces rotation of the steering gear arm and thereby actuates the steering
linkage.
The hydraulic system of the Coaxial gear con-
sists
of a
double-acting piston, a valve (which
fits inside the piston), and a hydraulic reaction
chamber (which gives
the road). Axial positioning
high pressure oil
double-acting piston.
to
one side
the
At
driver
the
the
of
the valve directs
or
the other
same time, valve
"feel"
of
of
the
movement opens an oil return line which carries
oil from
the oil reservoir. The direction
depends upon
the
low pressure side
the
direction
of
the
piston
of
oil
flow
of
steering wheel
to
(which
rotation) is such that hydraulic force is added to
the driver's effort and
rack and sector gear
Other components
is
transmitted through the
to the
of
steering gear
the
hydraulic system
arm.
are, a generator-driven oil pump with pressure
relief valve
with
the oil
limits the oil
(IV2 gallons
horsepower required
and
flow control valve,
reservoir.
flow
per
The
to a
predetermined maximu^n
minute)
to
drive the
and a filter
flow control valve
and
thus holds
oil
pump
tHe
to
minimum.
a
LOW PRESSURE - HIGH FLOW
•FLOW CONTROL VALVE (OPEN)
PRESSURE RELIEF
VALVE (OPEN)
HIGH PRESSURE - HIGH FLOW
Fig.
12—Pump Pressure
and
Flow
53x632
a. Power Steering
Assembly
The
oil
pump
mounted
at
cartridge-type filter element
reservoir. Oil from
flows through
body, through
the reservoir chamber. From
Oil
and
the
rear
end
the
an
internal passage
the
full-flow
Pump, Reservoir
and
reservoir assembly
of
the
generator.
is
located
in the
steering gear assembly
oil
the
in the
filter,
reservoir,
pump
and
is
A
into
oil
enters the oil pump intake (Fig. 12). The position
of
the oil pump
tain level fluid
is
adjustable
in
reservoir when drive belt
to
help main-
is
adjusted.
A small diaphragm vent valve
in
the
reservoir cover is forced open to provide a passage to
the atmosphere,
if
excessive pressure occurs
in
the reservoir.
With cold
through
pressure would build-up
the
oil,
filter
insufficient
to
the
reservoir,
in
oil
the
line from
would pass
and the oil
the
steering gear assembly. Therefore, a spring-
402—STEERING
OUT
(LOW
PRESSURE
CHRYSLER SERVICE MANUAL
OIL)
SPOOL VALVE
IN NEUTRAL POSITION,
AND VALVE BODY OFFER LITTLE FLOW RESTRICTION
PRESSURE
HOLDS PISTON STATIONARY.
PISTON
Fig.
THE
OPENINGS BETWEEN
IS LOW.
13—Oil Flow—Neutral Valve Position
EQUAL PRESSURE
(N
(LOW
THE
ON
BOTH PISTON FACES
PRESSURE
53x859
VALVE
SO OIL
OIL)
OUT (LOW PRESSURE
t
SPOOL VALVE
WHEN
"A"
AND "BM. OIL
LIC FORCE
PRESSURE CYLINDER,
FORCED
PISTON
OIL)
THE
VALVE
ON
PISTON.
OUT
RETURN PASSAGES.
IS
PULLED
PRESSURE INCREASES GREATLY, CREATING A HYDRAU-
AND OIL IN THE LOW
UP, IT
AS
PISTON MOVES,
OFFERS FLOW RESTRICTION
OIL
ENTERS
PRESSURE CYLINDER
THE
IN (HIGH PRESSURE
AT
HIGH
IS
OIL)
53x860
Fig.
14—Oil Flow—Right Turn—Valve Pulled
Up
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