Table of Contents
Advertisement
ZK-6
MANUAL STEERING GEAR
JBASSEMBLY If E1HAUL
Wormshaft a i l Ball lut
(1) Place clean shop cloths on workbench and posi-
tion wormshaft and ball nut on cloths.
(2) Remove upper bearing from wormshaft.
(3) Remove ball guide clamp attaching screws and
remove clamp.
(4) Remove ball guides. Separate guide halves and
retain ball bearings that stayed in guides during
removal.
(5) Remove remaining ball bearings from ball nut
circuits. Position ball nut over shop cloths and rotate
wormshaft back and forth until bearings drop out onto
cloth.
N O T E : There are a total of 50 ball bearings in the ball
nut with 25 in each circuit
(6) Remove wormshaft from ball nut.
Cleaning and Inspection
Wash all parts in solvent and dry using clean cloths or
compressed air. Inspect all components for wear, scor-
ing, cracks, nicks, or surface pitting and also check the
upper bearing and ball bearings for flat spots. If the
upper bearing is damaged, the upper bearing cup must
also be replaced.
(1) Position ball nut on workbench with ball guide
holes facing upward and deep side of ball nut teeth
facing edge of workbench (fig. 2K-7).
(2) Install wormshaft in ball nut from left side.
Thread shaft into nut until equal number of shaft
threads are visible at each end of nut (fig. 2K-7).
CAUTION: The ball nut
teeth are machined
to a
greater width and depth on one side. When
assembling
the wormshaft
and ball nut, position the ball nut so the
wider-deeper side of the teeth will face the housing side
cover opening after installation
(fig. 2K-7).
(3) Install one ball bearing in each ball guide hole.
(4) Move wormshaft up/down and side-to-side until
bearings roll into ball nut threads under wormshaft and
support wormshaft.
(5) Assemble and install ball guides in ball nut.
(6) Divide remaining 48 ball bearings in half and
install 24 bearings in each ball nut circuit. Insert bear-
ings into ball nut circuits through holes in ball guides
(fig.2K-8).
N O T E : To ease ball bearing installation,
rotate
the
wormshaft
back and forth slightly while inserting
the
bearings.
(7) Position ball guide clamp on ball nut and install
clamp attaching screws. Tighten screws to 4 foot-pounds
(6 N®m) torque.
(8) Lubricate
wormshaft
threads
with
chassis
grease and thread shaft in and out of ball nut to circu-
late grease.
C A U T I O N : To avoid damaging the tangs on the ball
guide ends, do not not allow the wormshaft
to bottom in
either
direction.
(9) Lubricate
wormshaft
upper
bearing
with
chassis grease and install bearing on wormshaft.
W O R M S H A F T
LOWER END
W O R M S H A F T
UPPER END
DEEP SIDE OF
B A L L N U T T E E T H
Fig. 2K-7
Positioning Wormshaft in Ball Nut
4 2 0 7 3
9 0 1 6 4
Fig. 2K-8
Installing Bearings in Ball Nut Circuits
Worm tearing Adjuster
Disassembly
(1) Remove wormshaft lower bearing retainer from
worm bearing adjuster. Use screwdriver to pry retainer
out of adjuster (fig. 2K-9).
(2) Remove
w o r m s h a f t
lower
b e a r i n g
from
adjuster.
Cleaning and Inspection
Clean parts in solvent and dry using clean cloths only.
Inspect all components for wear or damage and also
inspect the bearing for flat spots or scoring. If either the
lower bearing or bearing cup is damaged, both parts
must be replaced.
i — - " i w
—
!
m®? ~
• — l a w
'
. •
" . - . ^ _ _ _ _ _ _ z i _ z r ^ ! « ^
~
;
^ s ^ '
.
~ ;
mm••
-••
Advertisement
Table of Contents
Troubleshooting
