Dodge D150 1990 Service Manual page 786

•
STEERING 19 - 7
MANUAL STEERING GEAR DIAGNOSIS
I
EXCESSIVE PLAY |
Oft LOOSENESS
IN IMS STIERINGl
WHIIL
FRONT WHEEL
BEARINGS
IMPROPERLY
ADJUSTED
STEE
LINK
WOR
L a
RING
AGE
N OR
DSE
PULL TO ONE
| SIDE (TENDENCY
Of VEHICLE TO
V E E R IN ONE
•DIRECTION ONL
1
INCORRECT TIRE
PRESSURES OR
TIRE SIZES
NOT UNIFORM
WHEEL
BEARINGS
IMPROPERLY
ADJUSTED
BENT STEERING
LINKAGE
DRAGGING
BRAKES
IMPROPER
FRONT END
ALIGNMENT
BROKI
BADLY S
REAR 5
EN OR
AGGING
>PRING
HARD
STEERING
LOW OR
UNEVEN
TIRE
PRESSURE
INSUFf
LUBRI
IN STE
GEA
UNK
:
IC»ENT
CANT
ERING
R OR
AGE
WHEEL TRAMP
(EXCESSIVE
VERTICAL
MOTION
OF WHEELS)
INCORRECT
TIRE
PRESSURE
LOOSE
STEERING
LINKAGE
WORNC
FRON
P E N S O
OR BALI
m LOOSE
TSUS-
M PIVOTS
L JOINTS
STEERING ARM
LOOSE ON
STEERING
GEAR SHAFT
SECTOR SHAFT
ADJUSTMENT
LOOSE
WORM SHAFT
ADJUSTMENT
LOOSE
STEERING GEAR
MOUNTING
BOLTS LOOSE
STEERING
WHEEL LOOSE
ON STEERING
SHAFT
FRC
SUSPE
PIVOI
BALL J
FRO
>NT
NSION
r s o R
OINTS
ZEN
GREASE, OIL OR
BRAKE FLUID ON
BRAKE UNINGS
(UPON BRAKING
ONLY)
IMPR
FRON
AUGh
OPER
TEND
IMENT
GEAR SHAFT
ADJUSTED
TOO TIGHT
WORN OR
INOPERATIVE
SHOCK
ABSORBERS
TIRES OR
WHEELS
OUT OF
BALANCE
* TESTS, ADJUSTMENTS AND PROCEDURES ARE DESCRIBED IN THIS MANUAL
ON-VEHICLE ADJUSTMENTS
Two adjustments are p r o v i d e d for m a n u a l s t e e r i n g
gears (Figs. 2 a n d 3). T h e w o r m s h a f t b e a r i n g " p r e -
l o a d " t o r q u e a d j u s t m e n t a n d t h e b a l l n u t rack/sector
shaft gear t e e t h mesh (lash) a d j u s t m e n t .
WORMSHAFT ADJUSTER PLUG
BALLS AND GUIDES \ LOCKNUT
OIL
SEAL
WORM
BEARING
(UPPER)
BALL NUT
WORM BEARING
(LOWER)
SECTOR
RH36
Fig. 2 Wormshaft "Preload" Torque Adjustment
Before a n a d j u s t m e n t c a n be i n i t i a t e d for t h e b a l l
n u t rack/sector shaft gear t e e t h mesh (lash), i t m u s t
RN817
SIDE COVER
BUSHING
BUSHING v
S E A L - ^ /
SECTOR SHAFT
BALL NUT
LASH
ADJUSTER
SCREW
RN789
Fig. 3 Ball Nut Rack/Sector Shaft Gear Teeth Mesh
(Lash) Adjustment
be determined t h a t t h e w o r m s h a f t b e a r i n g " p r e l o a d "
t o r q u e is properly adjusted.
T h e wormshaft b e a r i n g " p r e l o a d " t o r q u e adjust-
m e n t is provided b y t h e w o r m s h a f t t h r u s t b e a r i n g
p l u g adjuster t h a t threads i n t o t h e h o u s i n g a t t h e
l o w e r end of the wormshaft.
S a f e t y g o g g l e s s h o u l d b e w o r n a t a l l t i m e s
w h e n i n v o l v e d w i t h s t e e r i n g g e a r s e r v i c e .